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Showing Results For: MCBs

MCBs

What are MCBs?

MCBs, which stands for miniature circuit breakers, are a kind of switch installed in an electrical circuit to switch off automatically during unfavorable conditions. Primarily, these are tiny wires being used to control or prevent the system from major damage, so they are frequently replaced with fuses in the low-voltage circuit since they are robust, efficient, secure, and more sensitive. They are typically designed to secure electrical circuits from overvoltage or heating. Commonly used in consumer units and distribution boards in a variety of industrial, commercial, and home applications, it is placed on DIN Rail.

Miniature Circuit Breakers from top manufacturers like ABB, Siemens, Schneider Electric, Eaton, Rockwell Automation, and Lovato is available from Enrgtech in a wide range of high-quality models.

How does a Miniature Circuit Breaker Function?

Overcurrent that flows for a long time through a miniature circuit breaker, then the bimetallic strip causes heat, which in turn bends it. This bending of the bimetallic strip expands a robotic handle, opening the interfaces and switching off the MCB; by doing so, it pauses the voltage to pass through the circuit. 

The MCB must be manually turned on to resume the flow of electricity. This device is designed to stop unintentional overloading of the cable in a no-fault scenario and safeguard the MCB from faults caused by overload or overcurrent. The degree of the overload will affect how quickly the MCB trips. Typically, a thermal device in the MCB is used to do this.

What are the Various Types of Circuit Breakers?

The three most commonly used types of circuit breaker protection being used in applications today are households, commercials, and industrials. The use is characterized by a curve structure, which finds out the falling features of the MCB: 

Curve B - trips between 3 and 5 times the Load Current

At rated current, type B would fail immediately at a pace of three to five times. They are configured to be used against inductive loads when turning surges are too limited. so that the household and commercial light configurations are compatible in such a scenario.

Curve C - trips between 5 and 10 times the full Load Current

Type C instantaneously trips at a rate of five to ten times its rated current. These are typically employed in situations with high inductive loads and high switching surges, such as in fluorescent lighting and tiny motors. Type C MCBs are preferred in these situations to manage larger amounts of short-circuit current.

Curve D - trips between 10 and 20 times the full Load Current

Type D - at a rate of between ten and twenty-five times its rated current, it will trip immediately. These are frequently used for extremely high inductive loads with strong inrush currents. Applications include big winding motors, industrial welding equipment, UPS systems, x-ray machines, etc.


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Rohs Verified
120938 PKZ-SOL20, Eaton
2 In Stock
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1 +
£ 103.29
Schneider Electric
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A9C62216, Schneider Electric
1 In Stock
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£ 173.90
Schneider Electric
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A9C62425, Schneider Electric
1 In Stock
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£ 276.52
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120939 PKZ-SOL30, Eaton
1 In Stock
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£ 108.77
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120937 PKZ-SOL12, Eaton
2 In Stock
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£ 97.82
Legrand
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0 225 25, Legrand
Pre Order
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£ 191.78
5SY7106-6KK13, Siemens
1 In Stock
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£ 30.20
Legrand
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401003, Legrand
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£ 165.89
Legrand
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409797, Legrand
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£ 341.35
174497 AZ-2-B50, Eaton
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£ 158.86
Legrand
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411623, Legrand
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£ 197.21
174498 AZ-2-B63, Eaton
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£ 179.21
174511 AZ-3-B63, Eaton
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£ 261.37
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278577 FAZ-D5/1, Eaton
1 In Stock
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£ 39.20
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2CDS253001R0164 S203-C16, ABB
1 In Stock
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£ 52.64
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278556 FAZ-C8/1, Eaton
9 In Stock
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£ 40.92
Legrand
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407648, Legrand
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£ 54.69
174540 AZ-4-B125, Eaton
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£ 447.62
278757 FAZ-C12/2, Eaton
2 In Stock
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£ 100.95
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£ 100.95
174499 AZ-2-B80, Eaton
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£ 203.46
Legrand
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005818, Legrand
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£ 174.02
Legrand
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409565, Legrand
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£ 156.48
Legrand
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410855, Legrand
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£ 331.07
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278532 FAZ-B12/1, Eaton
2 In Stock
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£ 18.23
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278548 FAZ-C1,6/1, Eaton
33 In Stock
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£ 41.55
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New Items
New items
4 035 45, Legrand

4 035 45, Legrand

The Legrand Thermal magnetic Miniature Circuit Breaker which is compatible with prong-type and fork type supply busbars. Conform to IEC 60898-1 Equipped with special DIN rail clamp Can be equipped with DX³ signalling Nominal Rating is 16A Number of modules is 3
New items
4 035 46, Legrand

4 035 46, Legrand

The Legrand Thermal magnetic Miniature Circuit Breaker which is compatible with prong-type and fork type supply busbars. Conform to IEC 60898-1 Equipped with special DIN rail clamp Can be equipped with DX³ signalling Nominal Rating is 20A Number of modules is 3
New items
4 035 49, Legrand

4 035 49, Legrand

The Legrand Thermal magnetic Miniature Circuit Breaker which is compatible with prong-type and fork type supply busbars. Conform to IEC 60898-1 Equipped with special DIN rail clamp Can be equipped with DX³ signalling Nominal Rating is 40A Number of modules is 3
New items
EDB14020, Schneider Electric

EDB14020, Schneider Electric

Square D MCBs E-Frame Square D For use with Qwikline I consumer units and can be retrofitted in to existing systems,Type B characteristic offers instantaneous short circuit response level of 3-5 x normal rated current, making it suitable for circuits with moderate inrush currents such as filament lamps, heating loads and most domestic/small building protection applications.,Type C characteristic offers short circuit response of 5-10 x normal rated current, making it ideal for circuits with higher inrush currents such as motor control and fluorescent lighting installations in industrial buildings where nuisance tripping might occur if a faster type was used
New items
P1RA4P63A300, Lovato

P1RA4P63A300, Lovato

The Lovato P1RA4P63A300 Differential lock with 4 Poles and 63 A Rating. Protect against fire
New items
P1RB1NC25A300, Lovato

P1RB1NC25A300, Lovato

The Lovato P1RB1NC25A300 Differential magneto thermal switch 1 Pole with type C characteristics. Type C characteristics
New items
278812  FAZ-S20/2, Eaton

278812 FAZ-S20/2, Eaton

Eaton Miniature Circuit Breakers (MCBs) - FAZ Series Features and Benefits Standards What are the differences between the Tripping Curves? Type B: Type C: Type D: Type K: Type S: Type Z:
New items
AHC041, Eaton

AHC041, Eaton

10kA MCBs Complies with BS EN 60898 Accept cable up to 25mm² Thermal/magnetic operation Positive contact indication (red-on, green-off) 1, 2 or 3 pole Memera Incoming & Outgoing Devices & Accessories MEM 250V DIN rail mount RCD’s and MCB’s etc, for use as spares and replacements in Memera consumer units.
New items
AHC103, Eaton

AHC103, Eaton

10kA MCBs Complies with BS EN 60898 Accept cable up to 25mm² Thermal/magnetic operation Positive contact indication (red-on, green-off) 1, 2 or 3 pole Memera Incoming & Outgoing Devices & Accessories MEM 250V DIN rail mount RCD’s and MCB’s etc, for use as spares and replacements in Memera consumer units.
New items
236272 | PXL-C5/2, Eaton

236272 | PXL-C5/2, Eaton

PXL series, C characteristic, 2-pole Circuit breaker with high selectivity as a pre-fuse with low passband energy Bus bar compatible With double terminal, lift / jaw top and bottom Free selection of rail arrangement top and bottom Finger-proof / back-of-hand-proof Quick-fit action with 3 locking positions for top-hat rail IEC / EN 60715 Standards IEC / EN 60898
New items
168080  FAZ6-D10/3, Eaton

168080 FAZ6-D10/3, Eaton

Type D MCB's An updated version of the PLS6 MCB but now certified to IEC / EN 60898 standard
New items
168084  FAZ6-D32/3, Eaton

168084 FAZ6-D32/3, Eaton

Type D MCB's An updated version of the PLS6 MCB but now certified to IEC / EN 60898 standard
FAQs
We offer free shipping for orders over £200 if delivery is in the UK. All other orders in the UK, shipping from £7.99 depending on the weight and measurement. Mainland Europe shipping charges start from £25. For all other countries shipping charges start from £50 for products like MCBs and all others.
You can email us directly at sales@enrgtech.co.uk or via our website for any queries regarding MCBs or any other product.
This depends on the MCBs individual product and information that can be found on our website.
Yes, we offer special discounts on orders above £200 for MCBs and all other products.
UK orders normally take between 2/3 working days. International orders normally take between 3/5 working days for all products including MCBs.
Yes. We keep updating our stock frequently and if a product like MCBs is not in stock then we will let you know.