Eaton xEffect MCB, 2P, 4A Curve B, 240 → 415V AC, 96V DC, 10 kA Breaking Capacity
- RS Stock No.:
- 922-7100
- Mfr. Part No.:
- 278726 FAZ-B4/2
- Brand:
- Eaton
Subtotal (1 unit)*
£71.24
(exc. VAT)
£85.49
(inc. VAT)
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In Stock
- Plus 2 unit(s) shipping from 27 October 2025
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Units | Per unit |
|---|---|
| 1 + | £71.24 |
*price indicative
- RS Stock No.:
- 922-7100
- Mfr. Part No.:
- 278726 FAZ-B4/2
- Brand:
- Eaton
Specifications
Technical Reference
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | Eaton | |
| Number of Poles | 2 | |
| Current Rating | 4A | |
| Tripping Characteristics | Type B | |
| Rated AC Voltage | 240 → 415V | |
| Rated DC Voltage | 96V | |
| Breaking Capacity at Maximum Voltage Rating | 10 kA | |
| Range | xEffect | |
| Circuit Breaker Type | MCB | |
| Width | 66mm | |
| Length | 35.4mm | |
| Mounting Style | DIN Rail Mount | |
| Depth | 80mm | |
| Model Number | 278726 | |
| Application | Commercial, Residential | |
| Reset Actuator Type | Toggle Switch | |
| Terminal Contact Type | Screw | |
| Break Time | Instantaneous | |
| Tripping Mechanism | Thermal-Magnetic | |
Select all | ||
|---|---|---|
Brand Eaton | ||
Number of Poles 2 | ||
Current Rating 4A | ||
Tripping Characteristics Type B | ||
Rated AC Voltage 240 → 415V | ||
Rated DC Voltage 96V | ||
Breaking Capacity at Maximum Voltage Rating 10 kA | ||
Range xEffect | ||
Circuit Breaker Type MCB | ||
Width 66mm | ||
Length 35.4mm | ||
Mounting Style DIN Rail Mount | ||
Depth 80mm | ||
Model Number 278726 | ||
Application Commercial, Residential | ||
Reset Actuator Type Toggle Switch | ||
Terminal Contact Type Screw | ||
Break Time Instantaneous | ||
Tripping Mechanism Thermal-Magnetic | ||
Eaton Miniature Circuit Breakers (MCBs) - FAZ Series
The FAZ series of miniature circuit breakers (MCBs) from Eatons xEffect range has a current limiting design providing fast short-circuit interruption that reduces the let-through electrical energy and overload currents that can damage the circuit.
Ideally suited to control circuits and electrical distribution boards the FAZ series of MCBs offer a wide range of diverse protection characteristics, protecting your electrical equipment against overload damage. For additional safety, the MCB breaker cannot be defeated by holding the handle in the ON position, these MCBs are also finger proof and have a trip-free mechanism.
These MCBs have both a thermal and electromagnetic release, with rated currents of 0.16 A up to 63 A and a switching capacity of 15kA or 10kA depending on the device type.
The FAZ series includes miniature circuit breakers, interlocks, busbars and snap-on accessories including auxiliaries and tripping modules.
Ideally suited to control circuits and electrical distribution boards the FAZ series of MCBs offer a wide range of diverse protection characteristics, protecting your electrical equipment against overload damage. For additional safety, the MCB breaker cannot be defeated by holding the handle in the ON position, these MCBs are also finger proof and have a trip-free mechanism.
These MCBs have both a thermal and electromagnetic release, with rated currents of 0.16 A up to 63 A and a switching capacity of 15kA or 10kA depending on the device type.
The FAZ series includes miniature circuit breakers, interlocks, busbars and snap-on accessories including auxiliaries and tripping modules.
Features and Benefits
Thermal-magnetic overcurrent protection
Power to the miniature circuit breakers can be fed from the line or load side
Clear indication of contact position via front switch toggle
Easy installation on DIN rail. MCB module width of only 17.5 mm (per pole)
Six levels of short-circuit protection, categorized by Type B, C, D, K, S and Z curves
Small modular width of the device and accessories saves space in the panel or equipment, which can lead to cost savings
Available in single pole up to 4 pole
Dual rating for IEC 60947-2 standard
MCB Module widths: 1P 17.5mm, 2P 35mm and 3P 52.5mm
Power to the miniature circuit breakers can be fed from the line or load side
Clear indication of contact position via front switch toggle
Easy installation on DIN rail. MCB module width of only 17.5 mm (per pole)
Six levels of short-circuit protection, categorized by Type B, C, D, K, S and Z curves
Small modular width of the device and accessories saves space in the panel or equipment, which can lead to cost savings
Available in single pole up to 4 pole
Dual rating for IEC 60947-2 standard
MCB Module widths: 1P 17.5mm, 2P 35mm and 3P 52.5mm
Standards
IEC 898; BS/EN60-898; EN50 022/DIN46277-3 (BS5584).
FAZ-C*/* & FAZ-S*/* = IEC/EN60947-2
IEC 60947-2 Relates to Low Voltage Circuit Breakers for use in industrial and similar installations. In the UK these are traditionally known as miniature circuit breakers (MCBs), moulded case circuit breakers
(MCCBs) and also air circuit breakers (ACBs).
FAZ-C*/* & FAZ-S*/* = IEC/EN60947-2
IEC 60947-2 Relates to Low Voltage Circuit Breakers for use in industrial and similar installations. In the UK these are traditionally known as miniature circuit breakers (MCBs), moulded case circuit breakers
(MCCBs) and also air circuit breakers (ACBs).
Standards
IEC 898; BS/EN60-898; EN50 022/DIN46277-3 (BS5584).
FAZ-C*/* & FAZ-S*/* = IEC/EN60947-2
FAZ-C*/* & FAZ-S*/* = IEC/EN60947-2
Eaton 2-Pole MCB, 4A Current Rating, 10kA Breaking Capacity - FAZ Series - 278726 FAZ-B4/2
Features & Benefits
• Screw terminals for a secure connection
• Line-side or load-side power feed for connection flexibility
• IP20 rating means it's touch-proof and safe to handle
• Not possible to override faults by holding the toggle down for increased safety of use
• Line-side or load-side power feed for connection flexibility
• IP20 rating means it's touch-proof and safe to handle
• Not possible to override faults by holding the toggle down for increased safety of use
How easy is this MCB to use?
Once installed, this MCB is simple to use. It has red and green indicators underneath the toggle for quick status identification. The toggle switch itself means it's quick to turn a circuit off to carry out checks or repairs to the connected circuits.
Note
Eaton formerly known as Moeller
Related links
- Eaton xEffect MCB 4A Curve B 96V DC, 10 kA Breaking Capacity
- Eaton xEffect FAZ MCB 4A Curve B 60V DC, 15 kA Breaking Capacity
- Eaton xEffect MCB 2A Curve B 96V DC, 10 kA Breaking Capacity
- Eaton xEffect FAZ MCB 4A 400V AC 10 kA Breaking Capacity
- Eaton xEffect MCB 32A Curve C 96V DC, 10 kA Breaking Capacity
- Eaton xEffect MCB 12A Curve C 96V DC, 15 kA Breaking Capacity
- Eaton xEffect MCB 500mA Curve C 96V DC, 10 kA Breaking Capacity
- Eaton xEffect FAZ MCB 4A Curve K 96V DC, 10 kA Breaking Capacity
