Rating of the best scotch-locks (ScotchLok) - connectors instead of "twists"

Many electricians are faced with the need to cut wires and make new connections. When repairing wiring in a car, household appliances, a cable line in a residential building or in production, the twisting method is most often used, closing the joint with electrical tape. This method makes the junction of the cables a "weak point", since voltage losses can occur here, and, with mechanical impact on the wiring connection, the contacts can break or a short circuit can occur.

Since the technologies do not stand still, in order to bring the damaged integrity of the electrical wiring as close as possible to its original state, so-called adhesive tape locks were developed. In this review, we will consider what ScotchLoks are and how to use them, what to look for in order not to make mistakes when choosing, and we will also make a rating of popular models based on reviews of real buyers.

What is ScotchLok

They are clamp-on terminal blocks. The cable core is securely clamped in the terminal block. Compared to a soldering joint, the use of an adhesive tape does not imply the use of additional equipment, it is enough to simply insert the wires into the connector and squeeze the joints with pliers. This technique saves time and makes the work of an electrician easier. Most connectors have a built-in blade plate that, when squeezed, cuts through the cable insulation and provides direct contact, after which the cables are locked tightly against each other. By using this method, the electrician does not need to strip the insulation. Some terminal blocks do not require the use of any tools at all, except for the hands of the master. Docking of cables is carried out in two stages - inserting the cables and snapping in the fixing cover.

Such connectors are made of dielectric fire-resistant materials (nylon, propylene), which provide not only insulating properties, but also prevent the penetration of moisture, dirt, dust. Waterproof properties are provided due to the use of a hydrophobic gel inside the adhesive tape (it repels water and prevents it from penetrating into the junction of the veins).

Scope of application

Most often, contact connections of this type are used for polymer-coated copper cables. According to electricians, the use of scotch-locks is best used for repairing auto-wiring conductors, installing computer networks, telecommunication wires, LED lighting, etc. This is the best option for low-voltage networks. So, scotch-lock is perfect for twisted pair telephone or network wire.

Despite the fact that most manufacturers of docking elements claim that their products can be used for wiring high voltage networks (up to 600 volts), experienced electricians do not recommend using such terminal blocks for them, since despite the high quality of the connection, there is still a possibility touching a bare wire, which could result in an electrical injury.

For use in high voltage power grids, it is recommended to use special tape locks that allow wider conductor cross sections. Such products are made of polypropylene and have shown themselves well when operated under conditions of exposure to various chemicals. The blade in this type of model is made of tinned brass, which does not corrode. Standard pliers can be used to clamp these terminal blocks.

What are the types of adhesive tape

Most often, there are three main types of connectors on sale: straight through, dead-end and T-shaped. Based on the name of each group, it is easy to get an idea of ​​the appearance and method of connecting cable cores, the functionality of each product. Dead-end and T-shaped models are used in places where rotation at a certain angle is required. T-shaped models also allow you to perform a side outlet from the wire, without breaking the main line.

Based on the number of wires to be connected, there are models for two, three and four wires. Double terminal blocks are used to connect cables at the break point, triple terminals are used for branching. Four-hole connectors are used to parallelize the baseline.

Another criterion for choosing a connector is the presence of a protective gel. According to the recommendations of specialists, regardless of the type of electrical engineering, it is best to use models with a protective gel, which ensure reliable and long-term functioning, as well as protected from moisture and dirt.

By the type of opening, there are two types of scotch locks - the so-called "suitcase" (open like a suitcase lid) and non-opening (after the wires are inserted, you need to press the lid, resulting in a cut of the insulation). Contacts in both modifications are made according to the same technology, there are no special differences in the process of use.

For the convenience of electricians, special clamps for non-expandable adhesive tape are sold. In appearance, they resemble ordinary pliers without perforation on the working surfaces. These clamps can be replaced with standard pliers without loss of quality. Some products can be pinched with just your fingers.

It is most convenient to connect waterproof connectors with gel. Non-bare veins are inserted into them. It is enough just to cut the ends evenly, and put them in the open tape. Due to the gel, the wires are securely fixed inside. If adhesive tape without gel is used, the fixation of the cores may be unreliable, in which case it is recommended to additionally strengthen the connection.

Manufacturers do not recommend using wires with a cross section lower or higher than that stated for a particular model. In the first case, the required level of fixation will not be achieved, in the second, the bearing cores may be damaged, which may cause problems, up to a short circuit. Another feature of this type of terminal blocks is the prohibition of their use on aluminum wiring. Due to the fact that aluminum has increased fluidity, the contact at the junction cannot be of good quality, and weakens over time.

Rating of quality scotch locks

Since there are three different types of terminal blocks, for convenience, we will divide the models under consideration into three categories: pass-through, dead-end, T-shaped.

Pass-through models

As previously mentioned, through-through models are terminal blocks, in which, when connecting wires, a perpendicular branch is not required, the wire is joined at two opposite ends. Despite the ease of use of such connectors, they are not often purchased.

UDW2

This Russian-made connector is used for a pair of cores, suitable for parallelization. The terminal block is used for wires with a core diameter of 0.9 to 1.3 mm. Allowable insulation thickness is up to 4.4 mm. According to buyers, such an adhesive tape is recommended for copper cables, or steel, but covered with copper. The product is made of plastic that has increased UV resistance properties. Inside the connector there is a hydrophobic gel that prevents the penetration of water and other liquids into the junction of the conductors. The manufacturer claims that the junction will perform its functions for at least the service life of the cable and wire products (40 years or more). For crimping the adhesive tape, it is recommended to use a special crimp or pliers, since it is difficult to do it manually. The average price of a product is 151 rubles per unit.

• suitable for parallel connections;
• conductors are connected without bending, which prevents the occurrence of creases;
• long service life.

• high unit cost.

SCOTCHLOK 534

The product of one of the best Russian manufacturers 3M is well known in the field of selling electrical goods. This cut-in model is used for power cables up to 600 V. It can be used for copper wiring with one or two cores. No cleaning is required during installation, the contact point is completely isolated. The U-shaped knife is tin-plated, thanks to which it easily cuts any insulation and does not corrode for a long time. The popularity of this model is also due to the use by the manufacturer of a material that does not lend itself to combustion. The manufacturer allows the use of cables with a cross-section of 1.5 to 2.5 sq. Mm. Installation is carried out by crimping using special pliers or pliers. Unit weight does not exceed 2 grams, the average price is 35 rubles.

• budget price;
• you can buy not only in a stationary, but also order online in an online store using a photo and description;
• can be used for both automotive wiring and backbone networks.

• not suitable for cable and wire products with a large cross-section.

Heat shrinkable connector 3M

A feature of this model is a different method of installation - for this, you need to insert the wires into the holes (having previously cleaned them), and then warm up the heat-shrinkable cut (for example, using a lighter), after which it adheres tightly to the insulation and fixes it. Suitable for conductors with a cross section of 0.5 - 1.5 sq. mm. Inside the capsule there is a hydrophobic composition, which not only prevents moisture from penetrating inside (100% tightness is declared), but also additionally fixes the wiring.

The manufacturer guarantees the reliability of the connection throughout the entire service life of the wiring (up to 40 years). Of the advantages of the product, electricians note a transparent case, which allows you to visually assess the depth and location of the wiring inside. Shrink ratio - 1: 3. The product is made of a material that is highly resistant to abrasion and chemicals. The clamp can be used at temperatures from -55 ° C to + 105 ° C. The average price for 1 unit is 45 rubles.

• there is a hydrophobic gel;
• reliable fixing of the wiring;
• long service life.

• high price;
• stripping of insulation is required.

HJKT8 2044B

This is one of the most inexpensive Chinese-made terminal blocks. Used for quick connection of wires with a cross section from 1.1 to 1.8 sq. Mm. The core diameter is 1.2-1.5 mm, the insulation diameter is 2.3-3.3 mm. Clamps are supplied in a pack of 10. To connect the cables, insert them into the clamp and press firmly on it. Like previous models, terminal blocks are convenient to use for parallelizing wires. Many stores offer differentiated discounts when purchasing large quantities of terminal blocks.The average unit price is 22 rubles.

• connectors are inexpensive in price;
• suitable for fine wiring in vehicles;
• you can place an order on AliExpress, significantly saving money;
• at the junction of the veins, no bends are formed, which is an advantage when repairing wiring in a car, according to drivers.

• Since these products are manufactured in China, their quality is poor.

TWT TWT-SLC-UG

Another representative of Chinese connectors. It is a clamp with the ability to connect two parallel wires. The capsule is made of silicone, the bridge button is made of pvc plastic. All materials have increased thermal and fire resistance. Scotchlock is designed for joining electrical wiring with a diameter of 0.4 to 0.9 mm. The compact size allows the connection to be made discreetly and securely. The product is delivered in packaging in the amount of 100 pieces, with a total weight of 75 grams. The average cost of the kit is 570 rubles.

• economical price;
• compact size;
• there is a hydrophobic gel;
• high-quality materials of manufacture.

• the product is difficult to find in free sale, most often it is ordered on AliExpress.

HJKT4-A

Another interesting model from China. It differs from competitors in its square design, as well as the ability to connect only 2 wires. As in other clamps of this type, when you press the capsule cover, the wire is cut to the core, after which a reliable contact is established.

Inside the capsule there is a hydrophobic substance that prevents moisture from penetrating to the junction. The scotchlock itself is made of plastic compound with increased resistance to acids and solvents. The clamp is recommended for use for wiring with a cross-sectional thickness of 0.4 to 0.7 mm2. Operating temperature from -40 to +85 ° С. Unit weight is 0.66 g, cost - 12 rubles.

• budget price;
• adhesive tape with a function of increased resistance to chemicals can be used in a car, as it is not afraid of contact with technical fluids.

• the clamp prevents the connections from branching.

LSD-D2

This connector has several features: firstly, it is designed to connect two wiring lines, and secondly, it is equipped with a lock that allows you to connect and disconnect at the junction as needed. The key is designed in such a way as to exclude the possibility of mating with incorrect polarity. As in the other clamps under consideration, installation does not require stripping the insulation, docking is quick and without the use of additional equipment (with the exception of pliers or other similar tools). Rated current - 10 A, mains voltage - 300 V, wire cross-section - 18-24 AWG, diameter - 0.5-1.0 mm. Overall dimensions of the scotch tape - 22 * ​​9 * 5mm. According to electricians, despite the fact that the manufacturer allows a mains voltage of up to 300 V, the clamp is best used for auto-wiring and the joint of LED strips and modules. The average price of a product is 42 rubles per unit.

• there is the possibility of opening the circuit with a lock;
• wide range of applications;
• low price for a product of this level.

• difficult to find on sale;
• there is no hydrophobic composition inside the capsule.

Dead-end models

SCOTCHLOK 314

This is one of the most popular dead-end models. A feature of products of this type is the ability to connect simultaneously only two ends of one wire, which excludes parallel docking. Also, such connectors form a branch on the wiring, which is not always convenient. The considered modification is suitable not only for auto-wiring, but can also be used in household electrical installations, for insertion into the main power grid. The terminal block is suitable for all types of copper cables, including flexible and rigid, solid and stranded. The clamp does not require stripping the insulation and soldering the conductors.Inside it there is a hydrophobic gel that prevents water and other liquids from entering the product, increasing the durability of the product. Like other adhesive tape from this manufacturer, model 314 is made of polypropylene, which has increased resistance to combustion and melting at high temperatures. The maximum wiring section is 1.5 sq. Mm. Unit weight - 4 grams, average price - 85 rubles.

• there is a hydrophobic gel that prevents moisture from penetrating into the capsule;
• ease of installation - the capsule snaps into place with little effort;
• tin-plated contact provides piercing and secure fixation at the joint;
• can be used both for repairing wiring in the car and for household electrical networks;
• made of non-combustible materials;
• reliable assembly;
• low price for this type of clamps.

• when connecting the capsule, a bend is formed, which can damage the wiring in places where it is exposed to mechanical stress.

HJKT1

In appearance, the scotchlock in question is similar to the previous model, it differs from it only in color and the round shape of the capsule. Inside the silicone capsule there is a gel filler that not only prevents moisture from penetrating inside, but also contributes to a tighter fit of the contacts to each other. The connector is designed for thin wiring - clamped cross-section from 0.4 to 0.7 mm2, terminal diameter - 1.52 mm. The product can be used in bad weather conditions - operating temperature from -40 to +80 ° С. Buyers note the good quality of the adhesive tape, despite how much they cost - 9 rubles per unit. Product weight - 0.43 gr.

• budget price;
• wide range of operating temperatures;
• there is a hydrophobic filler.

• not suitable for high voltage wiring.

7UR

The product resembles the main competitors of Russian and Chinese production in appearance. The principle of operation and the method of installation are completely identical to analogues. Of the features, one can single out the type - AWG and the thickness of the cable section - up to 1.5 sq. Mm. The push button is red, the body is transparent, made of polyvinyl chloride, resistant to high temperatures. The weight of one unit is 0.2 grams. The cost is 20 rubles.

• durable and resistant material of manufacture.

• high price.

UR2

This model is designed for branching wiring, it has one inlet and two outlets. The permissible core diameter is 0.4-0.9 mm. Inside the capsule there is a hydrophobic filler that prevents the wiring from coming into contact with moisture. Crimping the mechanism is performed using a clamp or pliers. The average cost of a package (100 pcs.) Is 700 rubles.

• convenient to use for branching wires;
• there is a hydrophobic gel;
• small unit cost.

• not detected.

Netlan EC-SL-UY2-YL-100

The considered model is a kit used for branching telephone and network two-core wires. Supplied in a pack of 100. The cut-in knife is double, which ensures a tight connection of the cores. Each connector contains a hydrophobic gel that holds the wires in place and keeps them out of contact with the environment. The adhesive tape is made of plastic, it has no additional resistance to chemicals and mechanical damage. The unit weight is 0.6 g, the cost of the package is 215 rubles.

• profitable price;
• suitable for thin wiring;
• several contacts with different diameters can be connected.

• plastic is not of the highest quality.

3M Scotchlok O / B + 1.0-5.0 mm2

This cap-type adhesive tape is used for joining cables to wires. The product is not a mortise connector, but a twisted type. The principle of operation is that there is a spring inside the capsule, which strengthens the contact of the veins.Since the spring is not in a static state, it can change the compression force, as a result of which it is possible to connect wires of different cross-sections. A plastic skirt is provided inside the capsule that hides the exposed ends of the wiring. The product can be used in electrical networks up to 600 V. Polypropylene and thermoplastic elastomer are used for insulation. The materials used also have increased fire resistance and resistance to high temperatures (up to 105 ° C). Allowable wire section - 0.3-3.3 sq. Mm. The package contains 6 caps, the cost of the set is 320 rubles.

• can be used on high voltage wiring;
• can be used to join cables and wires;
• installation does not require the use of additional equipment;
• high quality wear and fire resistant materials.

• high price.

DORI insulated tape (K3)

Another representative of dead-end scotch locks, implying branching of the wiring (there are 3 inlets). The connector is made of transparent plastic, the push button is also made of plastic, red. The maximum cross-section of the conductor is 0.9 sq. mm. Clamps are used in low-current lines, such as computer networks, telephone connections, connection of low voltage lamps, LEDs, etc. The products are sold in packs of 25 pieces, with a total cost of 130 rubles. There is no hydrophobic filler inside, which explains the low cost of the product.

• profitable price;
• suitable for branching wiring.

• can only be used for wiring with a small cross-section;
• materials of manufacture are not of the highest quality.

Rexant 07-5402

Another representative of Chinese clamps. It is used for cables with a core diameter of 0.4-0.9 mm. Excellent for restoring the integrity of electrical wiring in the car. On the advice of buyers, this tape lock is convenient to use in confined spaces, since its small size allows you to discreetly hide the connection. Due to the well thought-out design and high degree of insulation, the possibility of oxidation of electrical wiring is excluded. The product is supplied in a transparent blister of 10 pieces, on the back there is a step-by-step instruction on how to use the clips. The average price of a package is 90 rubles.

• the small size of the products allows you to connect the wiring imperceptibly;
• low cost;
• since the product is sold in transparent packaging, this allows the buyer to evaluate its quality before choosing which Scotch-lock is better to buy;
• since the model is popular, buyers have no difficulty in where to buy the required quantity.

• no filler with water repellency and insulation function.

T-shaped models

These connectors are most often used for branching electrical wiring. Most have two inlets that are in line and one outlet that is perpendicular to them.

KW-6

This splitter is used for fine conductor wiring with a cross section of 0.5 - 0.75 sq. mm. The simplicity of the design, the absence of a hydrophobic filler and budget materials determine the inexpensive cost of the product. Depending on the number of purchased items, the price may vary from 5 to 15 rubles per 1 piece. The splitter is manufactured in China, so many experienced electricians recommend buying clips directly through AliExpress, which will significantly save money when purchasing a large number of them.

• the most preferable option for quick removal of the cable from the main line;
• favorable cost;
• when ordering through AliExpress, you can save a lot.

• cheap materials;
• poor-quality assembly of some products (there are occasional defects).

LSD-T2

This rare modification allows for branching of double parallel connections. Can be used for wiring 0.5-1.0 sq.mm with a rated current of 10 A. For the convenience of the master, a diagram is drawn on the connector cover that allows the docking to be done correctly. As in the case of the previous model, the price of a product depends on the purchased quantity, and ranges from 93 to 130 rubles per unit.

• it is possible to branch two parallel cables;
• high-quality assembly and material of manufacture.

• rarely on sale;
• high price.

Conclusion

Due to the fact that scotchlock is a novelty in the field of electrical installation, many electricians do not know what it is and complicate their lives by making poor-quality electrical wiring connections using twisting, or spending a lot of time soldering wires. Our article will allow you to evaluate this wonderful invention, understand the types and features of each model, and understand which connector is better to buy in each particular case.

Despite the low popularity of such connectors, if desired, you can find any model on sale, if not in a stationary, then in an online store, or on the AliExpress electronic platform. When choosing, we recommend paying attention not to the cost of a particular connector, but to the quality of the assembly and the material of its manufacture, since electrical wiring is an area where you should not save money during the repair, since the consequences of an error can be very expensive, both materially and morally aspect. We hope that our article will help you make the right choice!