Abb CR305X100B Auxiliary Contact Block Basic

Product Description

The ABB CR305X100B is a basic auxiliary contact block designed for use with motor starters and contactors in industrial and commercial electrical control systems. Auxiliary contact blocks extend the switching capability of a contactor by providing additional normally open or normally closed contacts for control circuit logic, interlocking, and status signaling. This unit is installed by licensed electricians and electrical maintenance technicians working on motor control centers, panel boards, and control cabinets where reliable auxiliary switching is required.

The CR305X100B is suited for industrial control applications where supplemental contacts are needed alongside primary contactor operation. Typical installations include motor control circuits in commercial HVAC systems, pump controls, conveyor systems, and other motor-driven equipment requiring control logic feedback or interlock wiring. It is intended as a direct add-on block that mounts to compatible ABB contactor and starter frames.

Key Features

• Basic auxiliary contact block configuration for add-on mounting to compatible contactors
• Extends control circuit switching without adding a separate relay
• Compact form factor at 3.5 inches long, 2.5 inches wide, and 1.0 inch tall
• Lightweight construction at 0.23 pounds for easy handling during panel assembly
• Suitable for control circuit interlocking and status signaling applications

Compatibility

Designed as an OEM-style add-on auxiliary contact block for compatible ABB motor starter and contactor assemblies. Verify contactor frame series compatibility before installation.

Installation Notes

Installation should be performed by a qualified electrician in accordance with NEC requirements and local electrical codes. De-energize and lock out the control panel before installing or removing auxiliary contact blocks. Confirm that the block is fully seated and mechanically secured to the contactor before restoring power. Do not exceed the contact rating of the auxiliary block when wiring control circuits.

Technical Specifications

• Length: 3.5 inches
• Width: 2.5 inches
• Height: 1.0 inch
• Weight: 0.23 pounds
• UPC: 78316635212

Standard Information

• Brand: ABB
• Manufacturer Part Number: CR305X100B