Why buy your circuit breakers from Communica in South Africa
When a distribution fault, lab build or production run depends on reliable overcurrent protection, fast local availability and the right spec matter more than the lowest headline price. Communica combines deep local stock of MCBs, RCCBs, thermal-magnetic breakers and DIN-rail accessories with branch pickup in Samrand, Pretoria CBD and Cape Town, prompt VAT invoicing, and practical technical guidance for makers, students and procurement teams.
Benefits you actually use
- Immediate access to commonly used ratings (6A-63A) and trip curves for prototyping and teaching labs.
- Branch pickup and same-day collection from our Samrand warehouse to avoid production delays.
- Simple VAT invoicing and account quotes for institution and project procurement.
Who this helps
If you are a university lab buying multiple units, a technical college equipping practical benches, a systems integrator specifying protective devices, or a maker building a solar microinverter bench - stock, spec guidance and compatibility matter. We stock brands and module styles that are widely compatible with standard consumer and small industrial distribution boards.
Quick links to get started
Explore product ranges, check branch hours or browse brands: Shop by category, Branches & trading hours, or see our company background at About Us.
Specification callouts: pick the right breaker for the job
Choosing a breaker means matching continuous current, trip characteristic, and installation form factor. Below is a compact comparison to help you narrow options before checking stock.
| Type | Typical use | Common ratings | Notes |
|---|---|---|---|
| MCB (B/C curve) | Lighting, outlets, machine protection | 6A-63A | C-curve common for motors; B-curve for resistive loads |
| RCCB / RCD | Earth fault protection, safety sockets | 30mA, 100mA | Select sensitivity for personnel protection |
| MCCB | Larger panels and distribution | >63A to 1000A | Adjustable trip settings; used in mains panels |
Specification tips from our engineers
Match the breaker's continuous current to at least 125% of sustained load for inductive circuits, and choose trip curves that protect wiring and equipment without nuisance trips. When in doubt, bring your circuit details to the Samrand branch for hands-on advice or request a quote for bulk purchases. For a broader view of parts and accessories, browse circuit breakers in stock.
Installation checklist and compatibility guidance
Confirm DIN-rail vs screw-mount, pole count (1P, 2P, 3P, 4P), neutral switching needs, and busbar spacing. Use the wiring diagram below for single-phase MCBs used on small panels.
Single-phase panel (top view) ----------------------------- | Line (L) ---[MCB]--- Load | | Neutral (N) ---------- Load| -----------------------------
If integrating with meters or contactors, confirm mechanical and electrical interlocks and busbar compatibility. For brand choices and maker-focused modules, see our curated brands list at circuit breakers stockist.
