Circuit breakers in Johannesburg: reliable local supply for projects and installations
Need a quick replacement, a batch for site work, or compliant components for a college project? Communica stocks a broad selection of circuit protection devices in South Africa with immediate availability from our Samrand head office and Johannesburg CBD branch. We prioritise real-world needs: same-day collection where possible, VAT invoicing for procurement, and specification guidance so you choose the right breaker for the job.
Why choose local stock and branch pickup
Local availability shortens lead times and removes freight uncertainties. Collect from Samrand or Pretoria CBD, use our branch network for urgent pick-ups, or request an account quote for larger orders. See branch hours and collection details here: Branches & Trading Hours.
Common types and where they fit
We stock low-voltage miniature circuit breakers (MCBs) for domestic and light commercial panels, moulded-case circuit breakers (MCCBs) for higher currents, and motor protection devices for small motors and HVAC. For makers and labs, we keep DIN-rail mount options, panel-mount holders, and accessory kits for safe prototyping.
| Type | Typical application | Rated currents |
|---|---|---|
| MCB (B, C, D curves) | Lighting, sockets, small circuits | 1 A - 63 A |
| MCCB | Distribution boards, motor feeders | 40 A - 1250 A |
| RCBO / Residual Current | Combined overload + earth-fault protection | 6 mA - 300 mA sensitivity |
Specification callouts to check before you buy
- Breaking capacity (kA) - match or exceed incoming fault levels.
- Tripping curve (B/C/D) - select based on inrush and motor characteristics.
- Voltage rating - single-phase vs three-phase systems.
- Mounting style - DIN-rail, panel, or busbar compatibility.
If you need help matching a breaker to a motor starter or distribution board, our product pages and brand listings provide datasheets and cross-reference info: Shop by Brand. Browse parts by category at Collections.
Compatibility and accessory bundles
Common compatibility issues are mechanical (rail width, enclosure depth) and electrical (breaking capacity, curve). We offer accessory bundles-DIN rails, terminal covers, link bars and labelled bus bars-so you receive a ready-to-install set. Request a tailored bundle or compare spec sheets using our Compare Specs guidance link: All Products.
