ABB OT125G3-4BSN1 125A 4-pole switch disconnector with left-hand neutral pole, base plate and DIN rail mounting for industrial electrical isolation.
£140.81
The ABB OT125G3-4BSN1 (SKU: 1SCA162525R1001) is a premium 4-pole switch disconnector designed to provide safe and dependable isolation for industrial machinery, commercial electrical installations and low-voltage power distribution systems. As part of the proven ABB OT Plus switch disconnector series, it combines robust performance, compact dimensions and flexible installation to meet the needs of panel builders, OEMs and electrical contractors.
Designed for base plate or DIN rail mounting, the OT125G3-4BSN1 features integrated screw terminals with front IP20 terminal protection for safe and straightforward installation. It is supplied with a direct-mounted, padlockable operating handle and can also be fitted with an external operating shaft where remote operation is required.
With a rated operational current of 125 A, a 4-pole configuration and a 55 kW switching capacity at 400 V AC, the OT125G3-4BSN1 is ideal for isolating three-phase systems with a left-hand neutral pole in industrial power distribution and automation applications.
Switch disconnectors provide a safe and visible method of isolating electrical circuits before maintenance, servicing and equipment replacement. The ABB OT125G3-4BSN1 enables reliable isolation of all three phases together with the left-hand neutral conductor, helping improve safety and minimise downtime.
The ABB OT Plus range is recognised for its durable construction, dependable switching performance and straightforward installation. These qualities make the OT125G3-4BSN1 a preferred solution for industrial control panels, switchboards and OEM electrical equipment.
| Current | 125 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | OT Plus |
| Model | OT125G3-4BSN1 |
| Order code | 1SCA162525R1001 |
| Product type | Switch disconnector |
| Rated operational current | 125 A |
| Number of poles | 4 |
| Neutral position | N1 (4th pole left) |
| Switching power at 400 V AC | 55 kW |
| Conditioned short-circuit current (Iq) | 50 kA |
| Mounting type | Base plate / DIN rail |
| Connection type | Screw terminals |
| Protection rating | IP20 terminal protection |
| Dimensions (H × W × D) | approx. 129 × 102 × 102 mm |
| HS Code | 85365080 |
| Country of Manufacture | Finland |
The ABB OT125G3-4BSN1 is used to safely isolate four-pole electrical circuits in industrial machinery, switchboards and power distribution systems.
The switch has a rated operational current of 125 A.
N1 indicates the switch has a left-hand fourth neutral pole, allowing all three phases and the neutral conductor to be isolated together.
Yes. The OT125G3-4BSN1 is supplied with a direct-mounted, padlockable operating handle and supports external shaft operation if required.
It is commonly installed in industrial control panels, switchboards, OEM machinery and commercial power distribution systems.
ABB OT Plus switch disconnectors are trusted by electrical engineers, panel builders and OEM manufacturers for dependable circuit isolation, robust construction and reliable long-term performance in demanding industrial 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...