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7.62mm Barrier Terminal Blocks
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7.62mm Barrier Terminal Blocks

With the 7.62mm Barrier Terminal Blocks from SUN, you can connect conductors safely and conveniently. In combination with Push-in connection technology, the screw connection principle with spring-guided screw makes wiring quick and easy. The 7.62mm Barrier Terminal Blocks are available for DIN rail or direct mounting. As China barrier terminal block manufacturers, SUN offers an electrical terminal block to meet the needs of most any application. A SUN barrier terminal block can be found to support either wire-to-board or wire-to-wire configurations.
  • EX25S/EX25SM

The 7.62mm Barrier Terminal Blocks are available with various connection technologies and as hybrid versions. Barrier connection technology provides a convenient to use, the high-performance connection that is reliable in any application. The barrier connection technology is subjected to tests that go beyond the basic standard testing, enabling barrier strip terminal block to be used in all sectors of industry, such as energy supply, transportation technology, and chemical, as well as shipbuilding industries.

Wiring Method of Barrier Terminal Blocks

1. Welding

The most common type of welding is soldering. The most important thing for the solder connection is that the continuity of the metal should be formed between the solder material and the surface to be soldered. Therefore, for terminal blocks, especially cold-pressed terminal blocks, solderability is important. The most common coatings on the soldering end of the ring terminal are tin alloy, silver, and gold. The reed contact has a solder tab type, a punching solder tab type, and a notched solder tab type for the common welding end. The pinhole contact has a drilled arc notch type for the common welding end.

2. Crimp

Crimping is a technique for compressing and displacing metal within prescribed limits and connecting wires to contact pairs. A good crimp connection can produce a mutual melting flow of metal so that the wire and contact deform the material symmetrically. This connection is similar to cold welding connection, it can get better mechanical strength and electrical continuity, it can withstand more severe environmental conditions. At present, it is generally believed that the correct crimp connection is better than soldering, especially in high-current occasions. When crimping, special crimping pliers or automatic or semi-automatic crimping machines must be used. According to the cold-pressed terminal and the cross-section of the cold-pressed end wire, the correct contact wire barrel should be selected correctly. It should be noted that the crimp connection is a permanent connection and can only be used once.

3. Winding

Winding is to wind the wire directly on the winding post of the angular contact. During the winding, the wire is wound under the control of the tension, pressed in and fixed at the corners of the winding post of the contact to form an airtight contact. There are several requirements for wire wrapping: the nominal value of the wire diameter should be in the range of 0.25mm~1.0mm; when the wire diameter is not greater than 0.5mm, the elongation of the conductor material is not less than 15%; when the wire diameter is greater than 0.5mm, the conductor The elongation of the material is not less than 20%. Tools for winding include winding gun and fixed winding machine.

4. Puncture connection

Puncture connection, also known as insulation displacement connection, is a novel terminal technology invented by the United States in the 1960s. It has the characteristics of high reliability, low cost, and ease of use. It has been widely used in various terminals for printed boards, cold-pressed terminal, cold-pressed end, and the ring terminal. It is suitable for the connection of ribbon cables. It is not necessary to strip the insulation layer of the cable during the connection. The tip of the U-shaped contact spring of the terminal is penetrated into the insulation layer to make the conductor of the cable slide into the groove of the contact spring and be clamped so that a tight electrical connection is formed between the cable conductor and the terminal spring. It requires only simple tools, but cables with specified wire gauges must be selected.

5. Screw connection

The screw connection is a connection method using screw terminal blocks, which allows the maximum and minimum cross-sections of the connecting wires and the maximum tightening torque allowed by screws of different specifications.

Sun is top 10 barrier terminal block manufacturers in China, offering high quality and low price barrier strip terminal block, barrier terminal block connector, and barrier strip connector.


EX25S    EX25SM



7.62 mm




M3Steel ,Zinc plated

Pin header

Brass, Tin   Plated


PA66 UL94V-0


Rated   voltage


Rated   current


Withstanding   voltage

AC2000V/1   Min

Wire range




Max torque   value


Sun Electric Co., Ltd
Founded in 2011, Sun Electric Co., Ltd specializes in the production of terminal blocks and industrial electrical connection products.

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