Original price was: $30.00.Current price is: $27.00.

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device application
product or component type
Miniature circuit-breaker.
device short name
Easy9 MCB.
number of protected poles
[In] rated current
40 A.
network type
trip unit technology
curve code
breaking capacity
4500 A Icn at 230 V AC 50/60 Hz conforming to IEC 60898-1.
4500 A Icn at 400 V AC 50/60 Hz conforming to IEC 60898-1.
suitability for isolation
Yes conforming to IEC 60898-1.
network frequency
50/60 Hz.
[Ue] rated operational voltage
230 V AC 50/60 Hz.
magnetic tripping limit
5…10 x In.
[Ics] rated service breaking capacity
4.5 kA 100 % x Icn at 230 V AC 50/60 Hz conforming to IEC 60898-1.
[Ui] rated insulation voltage
500 V AC 50/60 Hz conforming to IEC 60898-1.
[Uimp] rated impulse withstand voltage
4 kV conforming to IEC 60898-1.
contact position indicator
control type
local signalling
mounting mode
mounting support
DIN rail.
9 mm pitches
81 mm.
18 mm.
66.5 mm.
Grey (RAL 7035).
mechanical durability
10000 cycles.
electrical durability
4000 cycles.
connections – terminals
Tunnel type terminal (top or bottom) 1…25 mm² flexible.
Tunnel type terminal (top or bottom) 1…35 mm² rigid.
tightening torque
3.5 N.m top or bottom.
earth-leakage protection


IEC 60898-1.
product certifications
IP degree of protection
IP20 conforming to IEC 60529.
pollution degree
relative humidity
95 % at -25…60 °C.
ambient air temperature for operation
-25…60 °C
ambient air temperature for storage
-40…85 °C
Packing Units
Unit Type of Package 1
Number of Units in Package 1
Package 1 Weight
119 g
Package 1 Height
7.4 cm
Package 1 width
1.8 cm
Package 1 Length
8.5 cm
Package 2 Weight
1.505 kg
Package 3 Weight
17.136 kg
Offer Sustainability
Sustainable offer status
Green Premium product.
REACh Regulation
REACh Declaration.
EU RoHS Directive
EU RoHS Declaration.
Mercury free
RoHS exemption information
China RoHS Regulation
China RoHS declaration.
Product out of China RoHS scope. Substance declaration for your information.
Environmental Disclosure
Product Environmental Profile.
The product must be disposed on European Union markets following specific waste collection and never end up in rubbish bins.

The ABB S251-L10 breaker pole is a crucial component in modern electrical systems, providing essential circuit protection in residential, commercial, and light industrial applications. As part of ABB’s extensive range of miniature circuit breakers (MCBs), the S251-L10 is designed to safeguard electrical circuits from overcurrents and short circuits, thereby ensuring the safety of both property and individuals.

Overview of ABB S251-L10 Breaker Pole

The ABB S251-L10 breaker pole is a single-pole MCB, meaning it protects one electrical circuit. It is commonly rated at 10 amps (A), suitable for applications where moderate current protection is required. This MCB is part of ABB’s commitment to providing reliable, high-quality electrical products that meet global safety and performance standards.

Design and Construction

The S251-L10 features a compact design, allowing for efficient use of space within electrical distribution panels and consumer units. It is engineered for DIN rail mounting, which simplifies installation and integration into existing electrical setups. The breaker’s housing is typically made from durable materials capable of withstanding the rigors of electrical environments, ensuring longevity and reliability in operation.

Functionality and Performance

The primary function of the ABB S251-L10 breaker pole is to protect circuits from overloads and short circuits. Overload protection is crucial in preventing overheating of electrical components due to excessive current flow, which can lead to fire hazards or damage to equipment. Short-circuit protection, on the other hand, rapidly interrupts the circuit in case of a fault, minimizing potential damage and ensuring the safety of connected devices and personnel.

ABB’s S251-L10 MCBs are designed to trip quickly under fault conditions, thereby reducing the risk of electrical accidents and minimizing downtime in electrical systems. These breakers are precision-engineered to operate reliably over their service life, maintaining consistent performance in diverse environmental conditions.


The ABB S251-L10 breaker pole finds widespread use in various applications, including:

  1. Residential Installations: Protecting electrical circuits in homes from overloads and short circuits, ensuring the safety of household appliances and occupants.
  2. Commercial Buildings: Safeguarding electrical systems in offices, retail spaces, and other commercial establishments where reliable circuit protection is essential for uninterrupted operations.
  3. Light Industrial Settings: Providing essential circuit protection in industrial environments with moderate electrical loads, such as small-scale manufacturing facilities or workshops.

Features and Benefits

  • Compact Design: Space-efficient MCB suitable for installations where panel space is limited.
  • DIN Rail Mounting: Facilitates easy installation and integration into electrical distribution panels.
  • Reliable Protection: Ensures robust protection against overcurrents and short circuits, enhancing the safety and longevity of electrical systems.
  • Compliance: Meets international standards such as IEC 60898-1, ensuring compliance with safety and performance requirements across different regions.

Safety Standards and Certifications

The ABB S251-L10 breaker pole complies with rigorous international safety standards, reflecting ABB’s commitment to delivering products that prioritize safety and reliability. These standards ensure that the MCB operates effectively under specified conditions and provides consistent performance over its operational life.


In conclusion, the ABB S251-L10 breaker pole is a vital component in electrical distribution systems, offering dependable circuit protection against overcurrents and short circuits. Designed for residential, commercial, and light industrial applications, this MCB combines compact design with robust performance, making it a preferred choice for electrical professionals and installers worldwide. With its adherence to international safety standards and ABB’s reputation for quality and innovation, the S251-L10 ensures safe and reliable operation in diverse electrical environments.