Siemens 3TX7144-H12 Size B Protection Module

Product Description

The SIEMENS 3TX7144-H12 is a Size B protection module designed for use with compatible contactors in industrial and commercial electrical control systems. This accessory mounts directly to the contactor to provide suppression and protection functions that extend the service life of switching components and reduce electrical interference on control circuits. It is installed by licensed electricians and industrial maintenance technicians working on motor control centers, panel boards, and automation equipment.

The 3TX7144-H12 is suited for commercial and industrial applications where contactor protection and coil suppression are required. It is appropriate for use in motor control, HVAC equipment panels, and other automated switching installations where Size B contactor accessories are specified. Consult the equipment documentation to confirm size and mounting compatibility before installation.

Key Features

• Size B form factor for direct mounting to compatible contactors
• Provides coil suppression to reduce voltage transients on control circuits
• Extends contactor service life by limiting electrical stress during switching
• Compact design with minimal footprint inside control enclosures

Compatibility

Designed as an OEM-style accessory protection module for Size B contactors in industrial and commercial electrical control applications.

Installation Notes

Installation should be performed by a qualified electrician in accordance with NEC guidelines and applicable local codes. De-energize and lock out the panel or control circuit before handling any contactor accessories. Verify the module size matches the contactor before mounting. Do not energize the circuit until the module is fully seated and secured.

Technical Specifications

• Size: B
• Weight: 0.11 pounds
• UPC: 75455493314

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 3TX7144-H12