ABB OTM125F2C21D230C compact automatic transfer switch with 125A rating, 2-pole open transition switching and 220–240V AC motor operation for standby power systems.
£1,398.70
The ABB OTM125F2C21D230C is a compact and highly reliable automatic transfer switch (ATS) designed to provide uninterrupted power transfer between two electrical power sources in industrial, commercial and critical infrastructure applications. As part of the professional ABB Compact ATS range, this motor-operated switch ensures dependable automatic changeover functionality for standby power systems and generator installations.
Featuring a 125A rated operational current, 2-pole switching configuration and 220–240V AC motor operational voltage, the OTM125F2C21D230C is engineered for safe and efficient source transfer in demanding electrical systems. The unit includes a self-supplied controller with adjustable operating parameters, simplifying installation while improving operational reliability.
Designed with open transition type 1-0-2 switching, the ABB OTM125F2C21D230C provides secure transfer between normal and backup power supplies while reducing downtime during mains failure events. Its compact dimensions and flexible base or DIN rail mounting options make it ideal for modern electrical distribution panels and industrial automation systems.
Automatic transfer switches such as the ABB OTM125F2C21D230C continuously monitor available power sources and automatically transfer electrical loads between primary and backup supplies during mains failure events. This ensures uninterrupted operation of critical systems while helping protect industrial processes and essential equipment.
The ABB Compact ATS range is designed for industrial and commercial applications where dependable power continuity, compact installation and operational safety are essential. Its motor-operated mechanism and integrated controller provide efficient automatic switching for standby generators, backup systems and dual-supply installations.
| Power | 45 kW |
|---|---|
| Current | 125 A |
| IP Rating | IP20 |
| Series | Compact ATS |
| Product type | Automatic transfer switch |
| ABB Product ID | 1SCA151418R1001 |
| Rated operational current AC-21A | 125A |
| Rated operational current AC-23A | 90A |
| Rated operational power AC-23A | 45kW at 380–415V |
| Number of poles | 2P |
| Motor operational voltage | 220–240V AC |
| Rated insulation voltage (Ui) | 800V |
| Rated impulse withstand voltage (Uimp) | 8kV |
| Transition type | Open transition |
| Switch positions | 1-0-2 |
| Mounting type | Base mounting or DIN rail mounting |
| Terminal type | Screw terminals |
| Protection rating | IP20 front protection |
| Short-time withstand current | 2.5kA for 1 second |
| Dimensions (W × H × D) | 233 × 103 × 131 mm |
| Weight | approx. 1.85 kg |
| EAN | 6417019818238 |
| HS Code | 85365080 |
| Country of Manufacture | China |
The OTM125F2C21D230C is used to automatically transfer electrical loads between two power sources, such as mains and generator supplies.
The switch supports a 125A rated operational current for industrial and commercial applications.
The device uses an open transition 1-0-2 switching mechanism with automatic motor-operated transfer functionality.
Yes, the switch supports both base mounting and DIN rail mounting for flexible installation.
The switch is suitable for industrial, commercial and critical power applications requiring reliable automatic source transfer and standby power continuity.
ABB Compact ATS automatic transfer switches are trusted by electrical engineers and panel builders for reliable source transfer, dependable standby power management and robust industrial performance.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...