1503-3/4ST

Top Termination:	Screws with Solder Lugs, Single
Material Flammability Rating:	UL94 V-0
Material - Insulation:	Polyphenylene Oxide (PPO)
Operating Temperature:	110°C
Mounting Type:	Chassis, Panel
Terminal Screw Finish:	Tin
Terminal Screw Material:	--
Color:	--
Features:	Flange
Barrier Type:	2 Wall (Dual)
Bottom Termination:	Closed
Series:	1500
Wire Gauge:	10-22 AWG
Voltage Rating:	--
Current Rating:	20A
Number of Rows:	2
Pitch:	0.375" (9.53mm)
Number of Wire Entries:	6
Number of Circuits:	3
Terminal Block Type:	Barrier Block
Part Status:	Active
Packaging:	Bulk

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Terminal blocks are electronic components that grant an efficient connection between wires and other instruments, allowing an effective electrical transfer. Barrier blocks are unique terminal blocks which offer flat and moment-proof electrically segregated pathways through the interstitial connection. There are two primary barrier block types, which is split by the number of connection points. The 3/4ST (3 pole/4 stage) model utilizes three poles and four stages in order to enclose four different conductor pairs within one block. This design allows for effective cable segregation, even within tightly packed arrangements. It also provides an effective solution in confined or hazardous areas, like wiring cabinets, machine rooms, and the like. Furthermore, the 3/4ST model allows the user to establish up four distinct connections via a single terminal block. This convenience increases versatility and eases bulk wiring and the resulting clutter.The application of a 3/4ST terminal block and its associated working principles are the focus of this article. Specifically, this article will take an in-depth look at the component’s versatile structure and its value to equipment and wiring connection operations.

Structure

The 3/4ST terminal block has four 1/4-inch connection points, three of which are “L-shaped” flat push-in clips, while the fourth point is a slightly larger one, which is used to engage the power cable. The upper section of the block has two distinct pathways; while the lower section has two other distinct pathways. Two paths are each situated at each side; dividing the upper from the bottom section.The power cable is connected by engaging the fourth connection point. It then extends through each of three sections’ pathways, until reaching the lower section’s fourth point. After connecting the fourth power cable, users can complete the connection with the aid of the L-shaped clips in order to place two more cables in the block.

Working Principles

The 3/4ST terminal blocks are connected to power supplies, control circuits, or measuring devices by means of tabs or another connecting element that is suitable for this type of connection. Connecting cables that can be used for the L-shaped clips are plastic or rubber cables and metal cables. These cables are used for permanent and temporary connections. The wiring sequence is rather simple; first, the power cable is connected to the bottom section’s fourth point, followed by two cables connected to the L-shaped clips on the top section. The connection point of the top section’s first two cables should be directed downwards, and the connection point of the bottom section should be directed upwards. This setup ensures a stable and reliable connection between the two points for each cable.This design allows for a stable and secure connection between the terminal block and equipment. The L-shaped clips ensure that the cables’ conductor bundles can be held securely and safely for extended periods of time. The 3/4ST terminal block design provides excellent insulation, which prevents interferences and reduces the risk of activity disruption and equipment damage.

Conclusion

Barrier blocks are essential components in electronics and electrical wiring systems and the 3/4ST model offers an efficient and effective solution. It allows for separation of conductors while still providing a connection pathway for four conductors in a single terminal block. The unique structure and working principles of the 3/4ST terminal block make them an invaluable tool in residential, industrial, and electronic power applications; as they offer reliable and secure connections, thanks to the L-shaped clips and effective conductor insulation.

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