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.
2CSR255151R1205 ABB DSE201 B20 A30 Residual Current Circuit Breaker with Overcurrent Protection DSE201 – 1P+N – 30 mA – 20 A – B – Type A
ABB DSE201 B20 A30 RCBO providing 20 A Type B overcurrent protection with 30 mA residual current protection in a compact one-module DIN rail device.
£46.58
Why Choose the ABB 2CSR255151R1205 RCBO?
The ABB 2CSR255151R1205, also known as the DSE201 B20 A30 - N Blue, is a compact 20 A Type B RCBO (Residual Current Circuit Breaker with Overcurrent Protection) that combines the functions of an MCB and RCD into a single DIN rail module. Designed for residential, commercial and light industrial installations, it provides comprehensive protection against overloads, short circuits and earth leakage faults while occupying minimal panel space.
With a 30 mA residual current sensitivity, the DSE201 offers additional protection against electric shock while helping reduce the risk of electrical fires caused by earth faults. Its compact one-module design makes it particularly suitable for modern distribution boards where space is at a premium.
The ABB DSE201 series is engineered to IEC standards and features thermal-magnetic overcurrent protection, making it ideal for protecting final circuits supplying sockets, lighting and general-purpose electrical loads.
Key Advantages
- Combines MCB and RCD protection in one compact device.
- 20 A Type B tripping characteristic.
- 30 mA earth leakage protection for additional personal safety.
- One-module width saves valuable distribution board space.
- Protects against overloads, short circuits and earth faults.
- Suitable for residential, commercial and light industrial installations.
Key Features
- ABB DSE201 RCBO series.
- 20 A rated current.
- Type B tripping characteristic.
- 30 mA residual current sensitivity.
- 1P+N configuration.
- Thermal-magnetic tripping mechanism.
- DIN rail mounting.
- Screw terminals for secure wiring.
Comprehensive Circuit Protection in One Compact Device
The ABB DSE201 RCBO combines overload, short-circuit and residual current protection within a single device, simplifying installation while improving electrical safety. By disconnecting the circuit rapidly during earth faults or abnormal current conditions, it helps protect both people and electrical equipment from potentially hazardous situations.
Its compact one-module construction makes it an excellent choice for modern consumer units and distribution boards where space efficiency and reliable protection are equally important. The integrated neutral conductor and functional earth wire further simplify installation and operation.
Typical Applications
- Residential consumer units.
- Commercial distribution boards.
- Socket outlet circuits.
- Lighting circuits.
- Small industrial installations.
- Electrical refurbishment projects.
Technical Specifications
Tick the specs you need, then view products that match.
| Poles | 1-pole + N | |
|---|---|---|
| Current | 20 A | |
| Phase | Single Phase | |
| Device Type | RCBO | |
| Trip Curve | B curve | |
| Breaking Capacity | 6 kA | |
| Residual Current | 30 mA | |
| RCD Type | Type A | |
| Manufacturer | ABB | |
| Series | DSE201 | |
| Model | DSE201 B20 A30 - N Blue | |
| Product ID | 2CSR255151R1205 | |
| EAN | 8012542658429 | |
| Product type | RCBO (Residual Current Circuit Breaker with Overcurrent Protection) | |
| Rated current | 20 A | |
| Tripping characteristic | Type B | |
| Residual current sensitivity | 30 mA | |
| Rated voltage | 230–240 V AC | |
| Configuration | 1P+N | |
| Breaking capacity | 6 kA | |
| Mounting type | DIN rail | |
| Terminal type | Screw terminals | |
| Width | 18 mm | |
| Height | 100 mm | |
| Depth | 69 mm | |
| Standards | IEC 61009-1, IEC 61009-2-2, AS/NZS 61009-1 | |
| Net weight | approx. 165 g |
Frequently Asked Questions
What is the ABB 2CSR255151R1205 used for?
The ABB 2CSR255151R1205 is an RCBO that protects electrical circuits against overloads, short circuits and earth leakage faults.
What is the current rating?
This RCBO has a 20 A rated current with a Type B tripping characteristic.
What is the residual current sensitivity?
The device provides 30 mA residual current protection for additional protection against electric shock.
How is the RCBO mounted?
The ABB DSE201 is designed for quick installation onto a standard DIN rail.
What standards does the RCBO comply with?
The device complies with IEC 61009-1, IEC 61009-2-2 and AS/NZS 61009-1 standards.
Trusted ABB Circuit Protection
ABB DSE201 RCBOs are trusted by electricians, panel builders and contractors worldwide for delivering dependable overload, short-circuit and residual current protection in residential, commercial and industrial electrical installations.
