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2CCS800900R0021 ABB S800-AUX/ALT Auxiliary/Signal Contact
ABB S800-AUX/ALT is a combined auxiliary and signal contact with two changeover contacts for remote operating-status and trip indication on compatible ABB S800 high-performance circuit breakers.
£33.17
Why Choose the ABB S800-AUX/ALT Auxiliary/Signal Contact?
The ABB S800-AUX/ALT is a compact combined auxiliary and signal contact designed for electrical status and trip indication when used with compatible ABB S800 high-performance circuit breakers. As part of the ABB S800 accessory range, it provides separate auxiliary and alarm signalling functions for integration into industrial control, monitoring and automation systems.
The device incorporates two changeover contacts: one AUX auxiliary contact and one AUX/ALT signal contact. The auxiliary contact follows the operating state of the associated circuit breaker, while the signal contact can indicate protective trips caused by thermal overload, magnetic short-circuit operation or compatible ABB release accessories.
With a 6 A conventional free-air thermal current, 690 V rated insulation voltage and 6 kV rated impulse withstand voltage, the S800-AUX/ALT is engineered for dependable signalling in demanding electrical installations. Its slim 9 mm width, IP20 protection and compatibility with AC and DC control circuits make it a versatile accessory for S800 circuit protection assemblies.
Key Advantages
- Combined auxiliary and signal contact for ABB S800 circuit breakers.
- Provides two changeover contacts: one AUX and one AUX/ALT.
- Enables remote indication of circuit breaker operating status and protective trips.
- 6 A conventional free-air thermal current.
- 690 V rated insulation voltage for demanding control applications.
- Suitable for AC and DC signalling circuits.
- Compact 9 mm wide design minimises panel space requirements.
- Complies with IEC 60947-5-1 and UL 489.
Key Features
- ABB S800 auxiliary/signal contact accessory.
- Two changeover contacts: 1 × AUX and 1 × AUX/ALT.
- 6 A conventional free-air thermal current (Ith).
- 24 V minimum operational voltage.
- 3 mA minimum operational current.
- 690 V rated insulation voltage (Ui).
- 6 kV rated impulse withstand voltage (Uimp).
- AC-15 and DC-13 utilisation categories for control and signalling circuits.
- IP20 protection rating.
- Mechanical lifetime of 6000 switching cycles.
Reliable Circuit Breaker Status and Trip Signalling
Auxiliary and signal contacts allow the operating condition of a circuit breaker to be communicated to external control and monitoring equipment. On the S800-AUX/ALT, the AUX contact operates together with the main contacts of the associated circuit breaker and can indicate manual switching as well as operation caused by overload, short circuit or compatible opening releases.
The ALT signal function is intended to distinguish protective or release-induced tripping from ordinary manual switching. This allows control systems, alarm circuits and remote monitoring equipment to identify circuit breaker trips more effectively, supporting faster fault diagnosis and improved visibility of electrical distribution systems.
Typical Applications
- Remote circuit breaker status indication.
- Protective trip and fault signalling.
- Industrial switchgear and distribution boards.
- PLC and automation system status inputs.
- Building management and monitoring systems.
- Machine control panels and industrial equipment.
- ABB S800 high-performance circuit breaker installations.
Technical Specifications
| Series | S800 |
|---|---|
| Product group | S800 / S800P / S750 MCB |
| ABB order code | 2CCS800900R0021 |
| EAN / GTIN | 7612271206819 |
| Product type | Combined auxiliary and signal contact |
| Contact function | Changeover contact |
| Number of contacts | 2 (1 × AUX, 1 × AUX/ALT) |
| Conventional free-air thermal current (Ith) | 6 A |
| Minimum operational current | 3 mA |
| Minimum operational voltage | 24 V |
| Rated insulation voltage (Ui) | 690 V |
| Rated impulse withstand voltage (Uimp) | 6 kV |
| AC-15 rating | 2 A at 400 V AC; 6 A at 240 V AC |
| DC-13 rating | 0.55 A at 250 V DC; 1.1 A at 125 V DC; 2 A at 60 V DC; 4 A at 24 V DC |
| UL 489 rating | 6 A at 125 V AC; 5 A at 250 V AC |
| UL 489 DC rating | 4 A at 24 V DC; 0.3 A at 125 V DC; 0.15 A at 250 V DC |
| Pollution degree | 3 |
| Protection rating | IP20 |
| Terminal capacity | 1 × 2.5 mm² or 2 × 1.5 mm² Cu; 14 AWG |
| Tightening torque | 1 Nm |
| Operating temperature | -25 to +60 °C |
| Storage temperature | -40 to +70 °C |
| Mechanical lifetime | 6000 switching cycles |
| Standards | IEC 60947-5-1 / UL 489 |
| Dimensions (H × D × W) | 95 × 82.5 × 9 mm |
| Product net weight | approx. 0.05 kg |
Frequently Asked Questions
What is the ABB S800-AUX/ALT used for?
The ABB S800-AUX/ALT is a combined auxiliary and signal contact used to provide remote electrical indication of the operating and trip status of compatible ABB S800 circuit breakers.
How many contacts does the S800-AUX/ALT have?
The S800-AUX/ALT has two changeover contacts, comprising one AUX auxiliary contact and one AUX/ALT signal contact.
What is the difference between the AUX and ALT functions?
The AUX contact follows the operating state of the circuit breaker, including manual switching and protective trips, while the ALT signal function indicates trips caused by overload, short circuit or compatible ABB opening releases.
What electrical ratings does the ABB S800-AUX/ALT have?
The S800-AUX/ALT has a conventional free-air thermal current of 6 A, a rated insulation voltage of 690 V and a rated impulse withstand voltage of 6 kV.
Which standards does the S800-AUX/ALT comply with?
The ABB S800-AUX/ALT is specified in accordance with IEC 60947-5-1 and UL 489 for use in compatible control and circuit breaker applications.
Trusted Circuit Breaker Accessories from ABB
ABB S800 auxiliary accessories extend high-performance circuit breakers with practical monitoring and signalling functions, allowing operating status and protective trips to be integrated into industrial control, automation and electrical distribution systems.
