ABB OT125G3-4DSN1 125A 4-pole door-mounted switch disconnector with left-hand neutral pole for industrial electrical isolation.
£115.00
The ABB OT125G3-4DSN1 (SKU: 1SCA162533R1001) is a robust 4-pole door-mounted switch disconnector designed to provide safe, dependable electrical isolation for industrial machinery, commercial switchboards and low-voltage power distribution systems. As part of the proven ABB OT Plus switch disconnector range, it delivers reliable switching performance, compact dimensions and long-term durability for demanding industrial applications.
Designed specifically for door-mounted installations, the OT125G3-4DSN1 features integrated screw terminals with IP20 protected terminal clamps from the front for improved installer safety. It is intended for use with ABB external operating handles and shafts (sold separately), making it ideal for enclosed control panels and switchgear assemblies. The N1 configuration incorporates the neutral pole on the left-hand side for applications requiring neutral isolation.
With a rated operational current of 125 A, a 4-pole configuration and a maximum operational voltage of 690 V AC, the OT125G3-4DSN1 provides dependable isolation for three-phase systems with neutral across industrial automation, motor control centres and commercial electrical installations.
The ABB OT125G3-4DSN1 provides a safe and visible means of isolating electrical circuits before maintenance and servicing. Its door-mounted design enables operators to disconnect power externally without opening the enclosure, improving personnel safety while reducing downtime.
Part of ABB's proven OT Plus family, this switch disconnector combines dependable switching performance, robust construction and straightforward installation, making it an excellent choice for electrical contractors, OEM manufacturers and panel builders.
| Current | 40 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | OT Plus |
| Model | OT125G3-4DSN1 |
| Order code | 1SCA162533R1001 |
| Product type | Door-mounted switch disconnector |
| Rated operational current | 125 A |
| Number of poles | 4 |
| Neutral position | N1 (4th pole left) |
| Rated operational voltage | Up to 690 V AC |
| Maximum motor power (AC-23A, 400/415 V) | 55 kW |
| Mounting type | Door mounted |
| Connection type | Screw terminals |
| Terminal protection | IP20 (front) |
| Standards | IEC 60947-3 |
| HS Code | 85365080 |
| Country of Manufacture | Finland |
The ABB OT125G3-4DSN1 is designed to safely isolate four-pole electrical circuits in industrial machinery, switchboards and power distribution systems.
The switch disconnector has a rated operational current of 125 A.
N1 indicates the switch features a left-hand fourth neutral pole, allowing all three phases and the neutral conductor to be isolated together.
Yes. The OT125G3-4DSN1 is specifically designed for door-mounted installations and is intended for use with ABB external operating handles and shafts.
It is commonly installed in industrial control panels, motor control centres, OEM machinery and commercial power distribution systems.
ABB OT Plus switch disconnectors are trusted by electrical engineers, OEM manufacturers and panel builders for dependable circuit isolation, robust construction and reliable long-term performance across demanding industrial environments.
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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...