Why choose Communica for your circular connectors quote
When a project hinges on reliable cable terminations, getting the right circular connectors quickly matters. Communica combines broad local stock, technical selection guidance, and practical purchasing for South African makers, students, technicians and procurement teams. Request a quote and you get accurate lead-times, VAT invoices for tertiary or company accounts, and options for branch collection from Samrand, Pretoria CBD or Cape Town to keep schedules on track.
Scope and support we provide
We help specify circular connectors in stock by application: signal, power, sensor, Ethernet or rugged field interconnects. Our team will confirm pinouts, shell sizes, contact plating, and mating compatibility so your quote reflects the assemblies and accessories you actually need - backshells, grommets, seals and mating plugs.
Practical spec callouts to include in your quote
- Shell size (e.g., M8 / M12 / 7/8") and thread variant
- Contact layout & number of poles (3, 4, 8, etc.)
- Current & voltage rating per contact
- Contact material and plating (gold, tin) for signal vs power
- IP or sealing options and gasket accessories
- Cable OD range and backshell clamp type
Quick specification comparison
| Type | Typical Use | Poles | Notes |
|---|---|---|---|
| M8 | Sensor/fieldbus | 3-8 | Small footprint, common in automation |
| M12 | Ethernet / power / sensors | 3-12 | Variants: A-code (sensors), D-code (Ethernet) |
| 7/8" | Industrial power & signal | 2-12 | Robust, higher current |
Compatibility guidance and checking
Compatibility is about mating geometry and contact layout, not just thread size. When you request a quote, include part numbers (if available) or these details: shell code, pin count, coding (A/D/X), and cable OD. We cross-check against stocked brands to confirm compatible mating pairs and suggest low-cost mating plugs or panel cutout templates.
Explore product ranges and sample brands to help describe your needs: Shop by Category, or browse our full index at All Products.
Example wiring diagrams (quick references)
Use these ASCII sketches when specifying pinouts in your quote:
M12 D-code (Ethernet RJ45 mapping - example) Shell top 1: Tx+ 2: Tx- 3: Rx+ 4: Rx- Shell bottom
And a simple power pin mapping for a 3-pin sensor connector:
3-pin: 1 = +V 2 = GND 3 = Signal
