1808489

Voltage - UL:	300V
Insulation Height:	0.472" (12.00mm)
Contact Tail Length:	0.154" (3.90mm)
Housing Material:	Polybutylene Terephthalate (PBT)
Contact Material:	--
Wire Strip Length:	--
Torque - Screw:	--
Screw Size:	--
Ingress Protection:	--
Material Flammability Rating:	UL94 V-0
Features:	Ejectors
Contact Mating Finish:	Tin
Operating Temperature:	--
Color:	Green
Wire Gauge or Range - mm²:	--
Wire Gauge or Range - AWG:	--
Series:	COMBICON MSTBV
Current - UL:	12A
Voltage - IEC:	400V
Current - IEC:	12A
Mounting Type:	Through Hole
Termination Style:	Solder
Plug Wire Entry:	--
Header Orientation:	Vertical
Pitch:	0.200" (5.08mm)
Number of Levels:	1
Positions Per Level:	4
Number of Positions:	4
Type:	Header, Male Pins, Shrouded (4 Side)
Part Status:	Active
Packaging:	Bulk

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Terminal Blocks - Headers, Plugs and Sockets

Terminal blocks are electrical connectors used for connection and disconnection of wires without the need for solder. They provide easy installation, maintenance and replacement of wires while protecting individual electrical components. Standard terminal blocks’ headers, plugs and sockets are rated with an IP rating from IP00 to IP67.

Application Field

Terminal blocks are commonly used in industrial, commercial and residential settings for reliable, stable connections in applications ranging from low voltage motor control circuits and distributed power systems to safety equipment and low voltage lighting products. They are also regularly used for termination of earth wires. In applications that may require changing, additional or relocation of wires, terminal blocks play an important role.

Working Principle

Standard terminal blocks are designed in function of safe and reliable connection and disconnection of wires. The general working principle is to use a plug and a socket in order to establish an electrical connection. The plug is designed to force a mechanical connection with the socket and an electrical connection of the two wires involved. The plug-socket connection is completed when all required wires are connected and the plug is inserted. To insure permanent connection and optimal electrical performance, terminal blocks are equipped with a locking device, such as a spring latch. After the plug is inserted into the socket, the spring latch prevents axial and/or rotational movement of the plug. To release the plug-socket connection, the plug must be pushed outward until the spring latch is unlocked

Materials

The most common materials for the construction of terminal blocks are insulators, opposed to conductors. Insulating materials are used because they resist the flow of electricity and protect against shock. Commonly-used insulating materials for terminal blocks include polyamide, polycarbonate, polybutylene terephthalate (PBT) and modified polyphenylene oxide (PPO).

Types

Terminal blocks are categorized into a wide variety of types, the most popular being basic blocks, disconnectable blocks, and barriers. Basic blocks connect incoming and outgoing wires in a single wiring phase, without the need of additional installation. Disconnectable blocks enable the easy and fast replacement of wires during maintenance or repair, whilst barriers ensure isolation between the power supply and other circuits. More recently, design advancements have lead to the development of special types, like signal blocks and sensor blocks, specifically tailored to accommodate signal and sensor connections in automation, security and energy management systems.

Conclusion

Terminal blocks are useful and versatile connectors that serve as a reliable connection and disconnection for a wide range of applications, from industrial use to residential settings. Their general working principle is based on plug-socket connection, and they are usually made from insulating materials such as polyamide and polycarbonate to ensure shock resistance. Standard terminal blocks come in a variety of types, from basic blocks to barriers and sensor blocks. Different blocks serve different purposes, allowing them to be easily and safely tailored to different circuits.

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