Abb CR305X300A Auxiliary Contact Block

Product Description

The ABB CR305X300A is an auxiliary contact block designed as an add-on accessory for motor starter assemblies. Auxiliary contacts expand the switching capacity of a contactor or motor starter by providing additional control circuit contacts used for signaling, interlocking, and status indication. This component is installed by licensed electricians and industrial maintenance technicians in commercial and industrial electrical control panels. It mounts directly to a compatible base contactor, extending the contact configuration without requiring a separate relay or additional panel space.

The CR305X300A is suited for motor control center applications, industrial control panels, and machinery where additional control circuit contacts are required alongside the main power contactor. Typical install scenarios include conveyor systems, pump controls, compressor starters, and HVAC motor control panels where auxiliary signaling or interlock circuits are needed. This part is appropriate for both new installations and replacement of worn or failed auxiliary contact blocks in existing starter assemblies.

Key Features

• Add-on auxiliary contact block for motor starter and contactor assemblies
• Provides additional control circuit contacts for interlocking and status signaling
• Direct-mount design attaches to compatible base contactor without additional hardware
• Supports motor control center and industrial panel applications

Compatibility

Designed as an OEM-style auxiliary contact accessory for compatible ABB motor starters and contactors in the CR305 series. Verify base contactor model acceptance of auxiliary contact blocks before installation.

Installation Notes

Installation should be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize and lock out the control panel before handling any contactor or starter components. The auxiliary contact block snaps or bolts onto the base contactor per the manufacturer mounting method — confirm mechanical fitment before applying power. Do not attempt to modify or disassemble the contact block assembly.

Technical Specifications

• UPC: 78316635262

Standard Information

• Brand: ABB
• Manufacturer Part Number: CR305X300A