1SBN010042R1131 ABB CA5-31MRT Top Mount Auxiliary Contact Block 3 N.O. + 1 N.C.

Why Choose the ABB CA5-31MRT Top Mount Auxiliary Contact Block?

The ABB CA5-31MRT is a reliable 4-pole auxiliary contact block designed for the operation of auxiliary and control circuits in standard industrial environments. As an ABB contactor accessory, it provides additional signalling and control contacts for compatible contactors while maintaining a compact, front-mounted installation.

The CA5-31MRT provides 3 normally open (N.O.) and 1 normally closed (N.C.) instantaneous auxiliary contacts. Its top/front mounting arrangement enables the block to be fitted directly to compatible ABB contactors, expanding their available auxiliary contact capacity without requiring a separate control relay.

Designed with ring-tongue terminal connections, the CA5-31MRT is particularly suited to industrial control panels where secure wired connections are required. ABB order code 1SBN010042R1131 identifies this exact CA5-31MRT configuration.

Key Advantages

• Compact top/front-mounted auxiliary contact block for ABB contactors.
• 4-pole configuration provides additional control and signalling contacts.
• 3 N.O. + 1 N.C. instantaneous contacts for flexible control circuit design.
• Ring-tongue terminal connections support secure industrial wiring.
• Designed for auxiliary and control circuits in standard industrial environments.
• Compact construction simplifies integration within electrical control panels.

Key Features

• ABB CA5-31MRT auxiliary contact block.
• 4-pole auxiliary contact arrangement.
• 3 normally open and 1 normally closed contacts.
• Instantaneous auxiliary contact operation.
• Top/front mounting on compatible ABB contactors.
• Ring-tongue terminal type.
• Auxiliary circuit rated operational voltage up to 690 V.
• Rated auxiliary circuit frequency of 50 / 60 Hz.
• Compact dimensions of approximately 47 × 43 × 39 mm.

Reliable Auxiliary Control for Industrial Contactors

Auxiliary contact blocks extend the control and signalling capabilities of contactors by providing additional electrically operated contacts. The ABB CA5-31MRT provides three normally open and one normally closed instantaneous contact, allowing designers to implement functions such as electrical interlocking, status indication, sequencing and control logic.

Its compact top/front-mounted construction makes the CA5-31MRT suitable for use within industrial control panels and machinery assemblies where space-efficient expansion of contactor auxiliary circuits is required. Ring-tongue terminal connections provide a secure connection method for demanding industrial control applications.

Typical Applications

• Industrial contactor control circuits.
• Motor starter assemblies and control panels.
• Electrical interlocking circuits.
• Contactor status and position signalling.
• Industrial machinery and automation systems.
• Sequencing and control logic circuits.