ABB Auxiliary Contact, 1 Contact, 1 CO, DIN Rail, 250V ac/dc, 1SDA066422R1

This auxiliary contact provides a changeover switching function for auxiliary signalling and control circuits in low-voltage installations. It is designed for DIN-rail mounting alongside moulded-case circuit breakers and contactors in industrial control panels, handling both AC and DC control voltages up to 250 V.

• Single changeover contact gives combined normally open and normally closed outputs
• Rated for 250V operation suitable for AC and DC control circuits
• DIN-rail mounting format enables straightforward panel integration
• Complies with IEC 60947-2 supporting standardised electrical characteristics
• Lightweight construction reduces additional load on rail-mounted assemblies

• Suitable for adding auxiliary signalling to Tmax XT breakers and contactors
• Used with control relays for status feedback in automation racks
• Ideal for monitoring breaker open/closed position in switchgear panels
• Can be used for interlocking functions in motor control systems

It is packaged as a single auxiliary contact module and intended to be fitted directly to a DIN rail adjacent to the primary device.

The device offers a single changeover arrangement delivering one normally open and one normally closed contact within the same module.

Its design follows IEC 60947-2 principles for auxiliary switching performance in low-voltage switchgear.

Yes, it functions as an accessory module compatible with the listed Tmax XT contactor family and similar DIN-rail assemblies.