ABB Aux.Contact 1+1 SF 40A OA4B1C

Why Choose the ABB OA4B1C Auxiliary Contact Mechanism?

The ABB OA4B1C is a compact and dependable auxiliary contact mechanism designed for use with compatible ABB low voltage switching equipment, including selected switch-disconnectors, non-fusible disconnect switches and fusible disconnect switches. It provides reliable auxiliary signalling for control, indication and automation circuits.

Featuring 1 normally open (1NO) and 1 normally closed (1NC) auxiliary contact, the OA4B1C gives engineers flexible switch status feedback from compatible ABB disconnect devices. This makes it ideal for applications requiring remote indication, interlocking, PLC input signalling or electrical control feedback.

With a 16 A conventional thermal current rating, compact dimensions of approximately 50 × 10 × 60 mm and a lightweight accessory design, the ABB OA4B1C is a practical and space-saving solution for industrial control panels and switchgear assemblies.

Key Advantages

• Genuine ABB auxiliary contact mechanism for compatible low voltage switchgear.
• 1NO + 1NC contact configuration for flexible control and indication circuits.
• 16 A conventional thermal current rating for dependable auxiliary switching.
• Compact accessory format suitable for panel and switchgear installations.
• Supports remote indication, interlocking and PLC feedback applications.
• Designed for use with compatible ABB disconnect and switch-disconnector equipment.

Key Features

• ABB OA4B1C auxiliary contact mechanism.
• 1 normally open and 1 normally closed auxiliary contact.
• Suitable for compatible ABB non-fusible and fusible disconnect switches.
• 16 A conventional enclosed thermal current.
• Compact snap-on auxiliary accessory format.
• Designed for switch position signalling and control feedback.
• Suitable for industrial control, monitoring and automation circuits.
• Lightweight construction for easy integration into switchgear assemblies.

Technical Specifications

• Manufacturer: ABB
• Model: OA4B1C
• Product type: Auxiliary contact mechanism / auxiliary contact block
• Contact configuration: 1 normally open (1NO) + 1 normally closed (1NC)
• Conventional enclosed thermal current (Ithe): 16 A
• Mounting style: Snap-on / accessory mounting
• Compatible equipment: ABB disconnect switches and switch-disconnector accessories
• Application: Auxiliary signalling, indication and control feedback
• Dimensions (W × H × D): approx. 50 × 10 × 60 mm
• Weight: approx. 0.02 kg
• Country of origin: Finland
• ABB product ID: 1SCA022193R0150
• EAN: 6417019018119
• UNSPSC: 39121522

Reliable Auxiliary Signalling for Switchgear

Auxiliary contact mechanisms such as the ABB OA4B1C are used to provide electrical feedback from a main switching device. This allows the switch status to be monitored by indicator lamps, relays, PLC inputs or wider automation systems.

The OA4B1C is especially useful where both normally open and normally closed signalling are required from one accessory. Its compact construction helps save space inside electrical panels while providing dependable control circuit integration for industrial installations.

Typical Applications

• Industrial control panels and switchgear assemblies.
• Remote switch position indication.
• PLC and automation system feedback.
• Electrical interlocking circuits.
• Machine control and monitoring systems.
• Compatible ABB non-fusible and fusible disconnect switch installations.

Trusted by Panel Builders and Industrial Engineers

ABB auxiliary contact mechanisms such as the OA4B1C are widely used in industrial switchgear and control panel applications where compact installation, reliable signalling and dependable electrical performance are required.