Circuit Protection

Circuit Protection: MCBs, RCDs and RCBOs

Circuit protection devices guard final circuits against overload, short circuit and earth-leakage faults. This range stocks ABB System pro M compact S200 MCBs, DS200 RCBOs and F200 RCDs, Mersen fuses and fuse gear, Chint NB1 and NL1, IMO, Lovato Electric P1 and Finder devices, in B, C, D and K curves from 0.5 A to 125 A.

Filter by brand, current rating, curve, pole count and breaking capacity. For higher currents see MCCB & ACB; for DC-rated breakers see PV MCB; for the boards they fit see Power Distribution Systems.

Showing 12,585 products

Product Key Specs Price Qty Stock Actions
Mersen Surge Protector Type 1+2 SPD 2 Pole 230 Volt 25KA TT Mersen STPT12-25K275V-2PG Type 1+2 surge protection device with 25 kA lightning impulse current rating and…
Mersen Surge Protector Type 1+2 SPD 2 Pole 230 Volt 25KA TT Mersen STPT12-25K275V-2PG Type 1+2 surge protection device with 25 kA lightning impulse current rating and…
  • 230 V
£188.64 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: 83120154
MERSEN FUSE 250V FC 0,20A. 5X20 AL MI5FCP25V0,20 Mersen M205033 MI5FCP25V0.20 fast-acting 5 × 20 mm miniature fuse with axial leads, rated at…
MERSEN FUSE 250V FC 0,20A. 5X20 AL MI5FCP25V0,20 Mersen M205033 MI5FCP25V0.20 fast-acting 5 × 20 mm miniature fuse with axial leads, rated at…
  • 250 V
£1.49 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: M205033
ABB s203p-z63na mcb s200p 4p z type 63a ABB S203P-Z63NA System pro M compact miniature circuit breaker featuring a 3P+N configuration, 63 A…
ABB s203p-z63na mcb s200p 4p z type 63a ABB S203P-Z63NA System pro M compact miniature circuit breaker featuring a 3P+N configuration, 63 A…
POA Manufacturer Lead Time Contact us for availability
Unavailable
SKU: S203P-Z63NA
Mersen Surge Protector Type 2+3 SPD 1 Pole 230/277 Volt 10KA L-N Remote Indication Mersen 83230103 STPT23-20K320V-1PM Type 2+3 pluggable surge protection device with 20 kA Imax, 320 V…
Mersen Surge Protector Type 2+3 SPD 1 Pole 230/277 Volt 10KA L-N Remote Indication Mersen 83230103 STPT23-20K320V-1PM Type 2+3 pluggable surge protection device with 20 kA Imax, 320 V…
  • 277 V Single Phase
£26.68 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: 83230103
MERSEN FUSE D01-RECTI.EINSATZ 440V 2A GR D01GR44V2 Mersen M215038 D01 NEOZED gR high-speed fuse link rated at 2 A and 440 V…
MERSEN FUSE D01-RECTI.EINSATZ 440V 2A GR D01GR44V2 Mersen M215038 D01 NEOZED gR high-speed fuse link rated at 2 A and 440 V…
  • 440 V
£8.38 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: M215038
MERSEN FUSE H 729P BCKUP 192-56/6,3 S209293 Mersen S209293 Limitor-PD high voltage DIN back-up fuse rated at 7.2 kV AC and 6.3…
MERSEN FUSE H 729P BCKUP 192-56/6,3 S209293 Mersen S209293 Limitor-PD high voltage DIN back-up fuse rated at 7.2 kV AC and 6.3…
£59.40 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: S209293
Mersen Surge Protector Type 2+3 SPD 3 Pole 400 Volt 10KA TNC Mersen 83230120 STPT23-20K275V-3P-LF Type 2+3 leakage current free surge protection device with 20 kA maximum…
Mersen Surge Protector Type 2+3 SPD 3 Pole 400 Volt 10KA TNC Mersen 83230120 STPT23-20K275V-3P-LF Type 2+3 leakage current free surge protection device with 20 kA maximum…
  • 400 V Three Phase
£72.37 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: 83230120
MERSEN FUSE BS GP FUSE HOLDER FB125 FORA4G BFB125A4G/1 Reliable front-back fuse mounting compliant with British Standards, suitable for AC/DC circuits up to 690VAC/460VDC…
MERSEN FUSE BS GP FUSE HOLDER FB125 FORA4G BFB125A4G/1 Reliable front-back fuse mounting compliant with British Standards, suitable for AC/DC circuits up to 690VAC/460VDC…
£65.61 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: M239119
MERSEN FUSE D02-H LSENPASSEINSATZ 4A 01706.004000 Mersen S222127 D0-system adapter sleeve for installing compatible D01 fuse links in D02 fuse bases,…
MERSEN FUSE D02-H LSENPASSEINSATZ 4A 01706.004000 Mersen S222127 D0-system adapter sleeve for installing compatible D01 fuse links in D02 fuse bases,…
£0.76 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: S222127
Mersen Surge Protector Type 2+3 SPD 4 Pole 230/400 Volt 10KA TNS Mersen 83230136 STPT23-20K275V-4P-LF Type 2+3 leakage current free surge protection device with 20 kA discharge…
Mersen Surge Protector Type 2+3 SPD 4 Pole 230/400 Volt 10KA TNS Mersen 83230136 STPT23-20K275V-4P-LF Type 2+3 leakage current free surge protection device with 20 kA discharge…
  • 400 V Three Phase
£130.42 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: 83230136
MERSEN FUSE A 070 URD 30 LI 0063 A070URD30LI0063 High-speed semiconductor protection fuse with striker indication and slotted blade connection, rated 63A at 690VAC…
MERSEN FUSE A 070 URD 30 LI 0063 A070URD30LI0063 High-speed semiconductor protection fuse with striker indication and slotted blade connection, rated 63A at 690VAC…
£143.44 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: M300138
MERSEN FUSE 6,9 URD 33 D11 A 0500 6,9URD33D11A0500 High-speed aR characteristic fuse rated for 500A at 690VAC (IEC) and 700VAC (UL) with striker…
MERSEN FUSE 6,9 URD 33 D11 A 0500 6,9URD33D11A0500 High-speed aR characteristic fuse rated for 500A at 690VAC (IEC) and 700VAC (UL) with striker…
£170.26 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: S300258
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