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Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Earth & Lightning Protection
Fuse Holders & Accessories
Fuses

52446 Products showing for Fuses & Circuit Breakers

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In Stock
RS Better World
Siemens SENTRON 5SY4 Miniature Circuit Breaker, 1-Pole, 10A, Type C, 400V ac AC, 72 V dc DC, 10 kA Breaking Capacity
  • RS Stock No. 383-2024
  • Mfr. Part No. 5SY4110-7
Subtotal (1 unit)
£19.78(exc. VAT)
£19.78/unit
In Stock
RS Better World
ABB System Pro M Compact S200 Miniature Circuit Breaker, 3-Pole, 32A, Type D, 440V ac AC, 6 kA Breaking Capacity
  • RS Stock No. 527-9633
  • Mfr. Part No. 2CDS253001R0321 S203-D32
Subtotal (1 unit)
£57.66(exc. VAT)
£57.66/unit
In Stock
Littelfuse Automotive Fuse Kit
  • RS Stock No. 219-9556
  • Mfr. Part No. 00940957XXN
Subtotal (1 unit)
£45.49(exc. VAT)
£45.49/unit
In Stock
Schneider Electric Acti9 iC60H Miniature Circuit Breaker, 3-Pole, 63A, Type D, 12V, 133 V, 220 V, 240 V, 380 V, 415 V,
  • RS Stock No. 791-3580
  • Mfr. Part No. A9F55363
Subtotal (1 unit)
£161.58(exc. VAT)
£161.58/unit
In Stock
RS Better World
Schneider Electric Acti9 A9N1 Miniature Circuit Breaker, 3-Pole, 100A, Type D, 375 V dc DC, 15 kA Breaking Capacity
  • RS Stock No. 221-0891
  • Mfr. Part No. A9N18513
Subtotal (1 unit)
£310.43(exc. VAT)
£310.43/unit
In Stock
Allen Bradley 1492 1492-SPM Miniature Circuit Breaker, 1-Pole, 6A, Type C, 277V ac AC, 48 V dc DC, 10 kA Breaking
  • RS Stock No. 125-1456
  • Mfr. Part No. 1492-SPM1C060
Subtotal (1 unit)
£21.88(exc. VAT)
£21.88/unit
In Stock
Contactum Defender B Board DDB Miniature Circuit Breaker, 1-Pole, 10A, Type C, 250V ac AC, 10 kA Breaking Capacity
  • RS Stock No. 184-9028
  • Mfr. Part No. CPB1010C
Subtotal (1 unit)
£5.20(exc. VAT)
£5.20/unit
In Stock
Littelfuse 15A Blue Car Fuse, 32V dc
  • RS Stock No. 787-4120
  • Mfr. Part No. 0287015.PXCN
Subtotal (1 pack of 10 units)
£2.54(exc. VAT)
£2.54/pack
In Stock
Littelfuse 10A Red Car Fuse, 32V dc
  • RS Stock No. 787-4101
  • Mfr. Part No. 0287010.PXCN
Subtotal (1 pack of 10 units)
£2.73(exc. VAT)
£2.73/pack
In Stock
RS Better World
ABB System Pro M Compact S200 Miniature Circuit Breaker, 3-Pole, 10A, Type C, 400V ac AC, 110 V dc DC, 6 kA Breaking
  • RS Stock No. 746-7769
  • Mfr. Part No. 2CDS253001R0104 S203-C10
Subtotal (1 unit)
£54.92(exc. VAT)
£54.92/unit
In Stock
Schneider Electric Acti9 iC60N Miniature Circuit Breaker, 1-Pole, 4A, Type C, 240V ac AC, 72 V dc DC, 50 kA Breaking
  • RS Stock No. 776-3449
  • Mfr. Part No. A9F74104
Subtotal (1 unit)
£58.83(exc. VAT)
£58.83/unit
In Stock
RS Better World
Schneider Electric Residual Current Circuit Breaker with Overload Protection, 16A Current Rating, 1-Pole, 30 mA Trip
  • RS Stock No. 212-166
  • Mfr. Part No. A9D07616
Subtotal (1 unit)
£60.50(exc. VAT)
£60.50/unit
In Stock
Littelfuse 5A Brown Car Fuse, 32V dc
  • RS Stock No. 787-4108
  • Mfr. Part No. 0287005.PXCN
Subtotal (1 pack of 10 units)
£2.65(exc. VAT)
£2.65/pack
Currently unavailable
Eaton xEffect xEffect Miniature Circuit Breaker, 4-Pole, 40A, Type D, 400V ac AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4813
  • Mfr. Part No. 168094 FAZ6-D40/4
Subtotal (1 unit)
£169.66(exc. VAT)
£169.66/unit
In Stock
RS Better World
ABB System Pro M Compact S200 Miniature Circuit Breaker, 1-Pole, 1A, Type C, 230V ac AC, 72 V dc DC, 6 kA Breaking
  • RS Stock No. 746-7646
  • Mfr. Part No. 2CDS251001R0014 S201-C1
Subtotal (1 unit)
£19.41(exc. VAT)
£19.41/unit
In Stock
Schneider Electric Acti9 iC60H Miniature Circuit Breaker, 1-Pole, 20A, Type C, 240V ac AC, 48 V dc DC, 10 kA Breaking
  • RS Stock No. 791-3307
  • Mfr. Part No. A9F54120
Subtotal (1 unit)
£26.13(exc. VAT)
£26.13/unit
In Stock
RS Better World
Siemens SENTRON 5SY4 Miniature Circuit Breaker, 1-Pole, 16A, Type C, 400V ac AC, 60 V dc DC, 10 kA Breaking Capacity
  • RS Stock No. 383-2030
  • Mfr. Part No. 5SY4116-7
Subtotal (1 unit)
£19.78(exc. VAT)
£19.78/unit
In Stock
Eaton xEffect xEffect Miniature Circuit Breaker, 1-Pole, 1A, Type B, 240V ac AC, 6 kA Breaking Capacity
  • RS Stock No. 230-0868
  • Mfr. Part No. 177373 FAZ6-B1/1
Subtotal (1 unit)
£19.76(exc. VAT)
£19.76/unit
In Stock
Schneider Electric Acti9 iC60H Miniature Circuit Breaker, 1-Pole, 40A, Type C, 240V ac AC, 48 V dc DC, 10 kA Breaking
  • RS Stock No. 791-3313
  • Mfr. Part No. A9F54140
Subtotal (1 unit)
£30.60(exc. VAT)
£30.60/unit
Temporarily out of stock
Eaton xEffect xEffect Miniature Circuit Breaker, 2-Pole, 4A, Type B, 415V ac AC, 96 V dc DC, 10 kA Breaking Capacity
  • RS Stock No. 922-7100
  • Mfr. Part No. 278726 FAZ-B4/2
Subtotal (1 unit)
£75.40(exc. VAT)
£75.40/unit
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