SQUARE D
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Square D
Keep your specialised distribution boards, commercial installations, and heavy-duty industrial power networks running safely with our immediately available stock of genuine Square D circuit protection components. As dedicated UK electrical supply experts, we specialise 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 Square D catalog is updated regularly and designed to accommodate a diverse range of configurations, including:
- Square D MCBs: High-quality miniature circuit breakers tracking single-pole, double-pole, and triple-pole layouts across legendary modern and heritage families—featuring the premium QOE (10000 and 6000 lines), KQ, SQO, Domae, and classic domestic QA or QO black-clip plug-in profiles.
- Square D RCBOs & Earth Protection: Comprehensive residual current breakers with overcurrent protection tracking popular compact single-module and double-pole lines—including the high-demand QOE, KQE, SQOE, SQOR, and heavy-duty Type 4 QOH-RCDX safety modules built for robust earth-leakage defense.
- Square D RCCBs & ELCBs: High-sensitivity residual current devices available across multi-pole distribution setups, featuring standalone double-pole and four-pole RCCB blocks (such as the RSD, QOE, and classic FIN series) providing reliable earth fault isolation up to 100 Amp.
- Square D MCCBs & Heavy Switchgear: High-capacity moulded case circuit breakers built for complex commercial engineering, featuring the premium I-Line framework alongside robust multi-pole SFA, SKA, SLA, SMA, and traditional FA/FAL collection lines scaling from 16A up to massive 1000 Amp industrial thresholds.
- Main Switches, Overloads & Accessories: Industrial-grade installation equipment and control gear, including 9065 triple-pole thermal overload relays, 5TE7 and QO series double-pole or four-pole main switch disconnectors up to 250A, multi-pole lugs units, terminal blocks, 7-day electronic timers, and low-voltage bell safety transformers.
- Advanced Circuit Safety: Reliable fault isolation across classic distributions, tracking versatile physical breaking capacity metrics (from standard 3kA, 4.5kA, 6kA, 10kA, 14kA, up to industrial 25kA, 36kA, and high-performance 50kA parameters) paired with distinct tripping curves (Curves B, C, D, and legacy Type 1, Type 2, or Type 3 options).
Why Choose Circuit Breaker Specialists?
- Free UK Delivery: Enjoy cost-free shipping automatically applied on every single order across our entire catalog.
- 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 minimise system downtime during critical faults.