ABB OTM40F4CB21D400C compact automatic transfer switch with 40 A current rating, 4-pole switching configuration, integrated BTM voltage sensing and 380–415 V AC motor operation for commercial and industrial power transfer systems.
£1,699.04
The ABB OTM40F4CB21D400C is a compact and highly reliable automatic transfer switch (ATS) designed for seamless switching between primary and standby power sources in commercial, industrial and infrastructure applications. As part of the advanced ABB Compact ATS range, this motor operated transfer switch automatically transfers electrical loads during mains failures to help maintain continuous power availability for critical systems.
Engineered for dependable low-voltage switching applications, the ABB OTM compact ATS series combines intelligent automatic transfer functionality, compact dimensions and robust electrical performance in a single integrated unit. ABB transfer switches are trusted worldwide by panel builders, electrical engineers and industrial contractors for installations requiring dependable source transfer and operational continuity.
With a 40 A operational current rating, 4-pole switching configuration, integrated BTM voltage sensing module and a 380–415 V AC motor operating voltage, the OTM40F4CB21D400C is ideal for generator changeover systems, small commercial installations and industrial power continuity applications. The integrated 21D controller provides adjustable operating parameters for flexible automatic transfer functionality and simplified commissioning.
Automatic transfer switches such as the ABB OTM40F4CB21D400C continuously monitor available power sources and automatically transfer electrical loads during mains failures or generator startup events. This helps reduce downtime while maintaining continuity for essential systems and electrical infrastructure.
The ABB Compact ATS range is widely used in commercial buildings, generator systems and industrial control applications where compact dimensions, dependable operation and straightforward installation are required. Its integrated motor mechanism, BTM voltage sensing functionality and configurable automatic controller simplify switchboard integration while improving operational reliability.
| Power | 18.5 kW |
|---|---|
| Current | 40 A |
| Phase | Three Phase |
| IP Rating | IP20 |
| Series | Compact ATS Switches |
| Product ID | 1SCA150580R1001 |
| Product type | Automatic transfer switch |
| Rated operational current | 40 A |
| Number of poles | 4P |
| Motor operational voltage | 380–415 V AC |
| Controller type | 21D |
| Voltage sensing | Integrated BTM module |
| Transition type | Open transition 1-0-2 |
| Rated operational voltage | 380–415 V AC |
| Rated insulation voltage (Ui) | 800 V |
| Rated impulse withstand voltage (Uimp) | 8 kV |
| Frequency | 50 / 60 Hz |
| Short-time withstand current | 2.5 kA for 1 second |
| Rated operational power AC-23A | 18.5 kW at 380–415 V AC |
| Power loss | approx. 1.6 W per pole |
| Mounting type | Base or DIN rail mounting |
| Protection rating | Front IP20 |
| Position of line terminals | Supplies on bottom - Load on top |
| Fourth pole type | Switched simultaneous function |
| Terminal type | Screw terminals |
| Dimensions (H × W × D) | approx. 103 × 286 × 131 mm |
| Weight | approx. 2.11 kg |
| HS Code | 85365080 |
| Country of Manufacture | China |
This automatic transfer switch is used to automatically transfer electrical loads between mains and backup power supplies such as generators.
The switch supports a rated operational current of 40 A for low-voltage commercial and industrial systems.
The motor operated mechanism requires a 380–415 V AC supply.
Yes. The 4-pole configuration allows simultaneous switching of all conductors including the neutral connection.
The “B” version includes an integrated BTM voltage sensing module used for automatic source monitoring and transfer functionality.
ABB Compact ATS transfer switches are trusted worldwide for dependable source transfer performance, compact construction and reliable operation in critical power continuity applications.
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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...