Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
abb Automatic transfer switch 125 amps with 4 Poles
ABB OTM125F4C20D400C automatic transfer switch with 125 A rating, 4 pole switching and 380–415 V AC operation for standby power and distribution systems.
£1,791.13
Why Choose the ABB OTM125F4C20D400C Automatic Transfer Switch?
The ABB OTM125F4C20D400C is a compact and reliable automatic transfer switch (ATS) designed for automatic power source changeover in industrial, commercial and standby power applications. As part of the ABB OTM Compact ATS series, it provides dependable motor-operated switching between two electrical sources to help maintain continuity of supply in low-voltage systems.
This automatic transfer switch features a motor-operated open transition 1-0-2 switching mechanism with a self-supplied controller and fixed operating parameters. Its compact construction makes it suitable for distribution boards, switchboards and control panels where reliable automatic source transfer is required.
With a rated operational current of 125 A, a 4-pole configuration and a 380–415 V AC operating voltage, the ABB OTM125F4C20D400C is ideal for three-phase power distribution systems, generator backup applications and commercial standby power installations.
Key Advantages
- Compact automatic transfer switch for reliable power continuity.
- 125 A rated current capacity for low-voltage power systems.
- 4-pole switching configuration including neutral switching.
- Integrated motor-operated automatic transfer functionality.
- Self-supplied controller with fixed operating parameters.
- Suitable for standby generator and dual-source applications.
Key Features
- ABB OTM Compact ATS series.
- Model: OTM125F4C20D400C.
- 125 A rated operational current.
- 4-pole automatic change-over switching.
- 380–415 V AC operating voltage.
- Motor-operated open transition 1-0-2 switching.
- Controller type: 20D.
- Integrated motor drive.
- Compact design for switchboards and distribution panels.
Reliable Automatic Source Transfer for Critical Systems
Automatic transfer switches such as the ABB OTM125F4C20D400C monitor available power sources and automatically transfer connected loads between normal and backup supplies when required. This helps improve system availability and reduce downtime during power interruptions.
The ABB OTM Compact ATS range provides electrical engineers, contractors and panel builders with a compact and dependable solution for automatic mains changeover, generator backup and industrial power management applications.
Typical Applications
- Automatic mains and generator transfer systems.
- Industrial power distribution panels.
- Commercial standby power installations.
- Electrical switchboards and control cabinets.
- Emergency power systems.
- Low-voltage automatic changeover applications.
Technical Specifications
Tick the specs you need, then view products that match.
| Mounting Type | Panel / door | |
|---|---|---|
| Device Type | Automatic transfer switch | |
| Operation | Automatic | |
| Poles | 4-pole | |
| Manufacturer | ABB | |
| Series | OTM Compact ATS | |
| Model | OTM125F4C20D400C | |
| Manufacturer part number | 1SCA151250R1001 | |
| Product type | Automatic transfer switch | |
| Rated operational current | 125 A | |
| Number of poles | 4P | |
| Rated operational voltage | 380–415 V AC | |
| Motor operational voltage | 380–415 V AC | |
| Rated insulation voltage | 800 V AC | |
| Rated impulse withstand voltage | 8 kV | |
| Frequency | 50 / 60 Hz | |
| Rated short-time withstand current | 2.5 kA for 1 s | |
| Rated operational current AC-21A | 125 A | |
| Rated operational current AC-22A | 125 A | |
| Rated operational current AC-23A | 90 A | |
| Rated operational power AC-23A | 45 kW | |
| Transition type | Open transition | |
| Controller type | 20D | |
| Mounting type | Distribution board / panel mounting | |
| Protection rating | Front IP20 | |
| Dimensions (W × H × D) | approx. 286 × 103 × 131 mm | |
| Weight | approx. 2 kg |
Frequently Asked Questions
What is the ABB OTM125F4C20D400C used for?
The ABB OTM125F4C20D400C is an automatic transfer switch used to transfer electrical loads between two power sources such as mains supplies and generators.
What current rating does this transfer switch support?
The OTM125F4C20D400C supports a rated operational current of 125 A.
How many poles does the ABB OTM125F4C20D400C have?
The unit features a 4-pole switching configuration for three-phase power systems with neutral switching.
What type of transfer operation does this ATS use?
The switch uses an open transition 1-0-2 transfer mechanism with a self-supplied controller and fixed operating parameters.
Where is this automatic transfer switch installed?
The ABB OTM125F4C20D400C is typically installed in distribution boards, electrical switchboards and standby power systems.
Trusted for Standby Power Applications
ABB OTM Compact ATS automatic transfer switches are trusted by electrical engineers and installers for reliable source transfer, compact installation and dependable power continuity.
