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DORMAN SMITH

DORMAN 40 MCB 3kA CIRCUIT BREAKER LOADMASTER

DORMAN 40 MCB 3kA CIRCUIT BREAKER LOADMASTER

£36.70

  • Item Condition:Used
  • SKU:8254
DORMAN 400 MCCB TRIPLE POLE 35kA LLBD400

DORMAN 400 MCCB TRIPLE POLE 35kA LLBD400

£499.99

  • Item Condition:Used
  • SKU:2356
DORMAN 5 AMP 3kA MCB CIRCUIT BREAKER LOADMASTER LM5

DORMAN 5 AMP 3kA MCB CIRCUIT BREAKER LOADMASTER LM5

£8.95

  • Item Condition:New
  • SKU:11422
DORMAN 50 AMP 3kA TRIPLE POLE MCB CIRCUIT BREAKER LOADMASTER
DORMAN 50 AMP CURVE C 10kA MCB CIRCUIT BREAKER AS50C BC

DORMAN 50 AMP CURVE C 10kA MCB CIRCUIT BREAKER AS50C BC

£23.95

  • Item Condition:Used
  • SKU:4222
DORMAN 50 AMP CURVE C 10kA TRIPLE POLE MCB CIRCUIT BREAKER X3PC50
DORMAN 50 AMP TYPE 3 M6 MCB CIRCUIT BREAKER AS503

DORMAN 50 AMP TYPE 3 M6 MCB CIRCUIT BREAKER AS503

£9.95

  • Item Condition:Used
  • SKU:11471
DORMAN 500 AMP TRIPLE POLE MCCB LOADLINE

DORMAN 500 AMP TRIPLE POLE MCCB LOADLINE

£399.99

  • Item Condition:Used
  • SKU:11007
DORMAN 6 AMP CURVE B 10kA 30mA RCBO TYPE A KR1PB0630A

DORMAN 6 AMP CURVE B 10kA 30mA RCBO TYPE A KR1PB0630A

£33.00

  • Item Condition:New
  • SKU:11411
DORMAN 6 AMP CURVE B 10kA 30mA RCBO TYPE AC KR1PB0630

DORMAN 6 AMP CURVE B 10kA 30mA RCBO TYPE AC KR1PB0630

£45.00

  • Item Condition:New
  • SKU:5682
DORMAN 6 AMP CURVE B 10kA MCB CIRCUIT BREAKER X1PB06

DORMAN 6 AMP CURVE B 10kA MCB CIRCUIT BREAKER X1PB06

£6.53

  • Item Condition:New
  • SKU:1190
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Dorman Smith
Keep your specialized distribution boards, commercial installations, and heavy-duty industrial power networks running safely with our immediately available stock of genuine Dorman Smith circuit protection components. As dedicated UK electrical supply experts, we specialize in sourcing both current and rare or obsolete modules, allowing you to find the exact replacements you need without facing costly panel retrofits.
Our online Dorman Smith catalog is updated regularly and designed to accommodate a diverse range of configurations, including:
  • Dorman Smith MCBs: High-quality miniature circuit breakers tracking single-pole, double-pole, and triple-pole variants across extensive historic and modern lines—including Loadmaster, Loadlimiter (LLR), Series 15, and classic AS, K, and X product series spanning 1A to 70A.
  • Dorman Smith MCCBs: High-capacity moulded case circuit breakers engineered for high-integrity commercial power distribution, featuring the premium Loadline collection (Type AA, YA2, YA3, and YA3J lines) scaling up to heavy-duty 800 Amp benchmarks.
  • Dorman Smith RCBOs & RCDs: Comprehensive earth-leakage protection modules available right now, including multi-pole RCCBs and double-pole RCBOs from the GR, KR1, KR2, and XR series lines across Type A and Type AC safety configurations.
  • Main Switches & Control Gear: Robust double-pole, triple-pole, and four-pole switch disconnectors up to 250 Amp alongside heavy-duty modular contactors with standard 230V and 240V coil specifications.
  • Advanced Circuit Safety: Reliable fault tracking across varied breaking capacity metrics (ranging from 3kA, 10kA, 25kA, up to industrial 65kA parameters) and distinct tripping characteristics (Curves B, C, D, and legacy Type 2, 3, and 4 curves).
Why Choose Circuit Breaker Specialists?
  • Free UK Delivery: Enjoy cost-free shipping automatically applied on every single order.
  • Same Working Day Dispatch: Complete your online checkout before 3PM, and we dispatch your package today.
  • Next Working Day Shipping: Urgent delivery options available at checkout to minimize system downtime during critical faults.