Why choose circular connectors from Communica near you
When your project or machine needs a reliable multi-pin connection that survives vibration, outdoor use or frequent mating cycles, circular connectors are the practical choice. Communica stocks a deep range of sizes, contact counts and termination styles so South African makers, students and technicians can source what works today - not wait weeks for imports. Local availability shortens lead times, supports branch collection and ensures you get VAT invoices for education and procurement workflows.
Fast local access and branch support
Order online and collect from Samrand, Pretoria CBD or Cape Town, or use our sub-distributor channels for projects outside major centres. Check branch stock levels and opening hours on the Branches & Trading Hours page to avoid delays.
Range highlights and typical applications
We carry circular connectors for signal, power and mixed-signal use - from small M8/M12 sensor connectors to larger 7-19 pin circulars for motor controllers and OEM equipment. Popular maker and OEM brands stocked include Amphenol-style multipin bodies and rugged crimp/contact kits. Browse by category on our Collections page to match series and accessories.
Specification callouts to check before you buy
When selecting a circular connector, verify these practical specs: shell size, contact count and layout, current rating per contact, contact plating (gold for low-level signals), termination style (solder, crimp, PCB), and IP/ingress considerations listed on the product page. If you need a quick comparison, use the "Compare Specs" checklist in-store or request a quote for bulk needs.
Quick spec comparison table
Below is a compact comparison of common families to help narrow options.
| Family | Typical Pins | Current/Pin | Termination |
|---|---|---|---|
| M8 | 3-4 | 2-4 A | Solder / Push-fit |
| M12 | 3-8 | 2-4 A | Crimp / Threaded |
| 7-19 pin circular | 7-19 | 5-16 A | Crimp / Solder / PCB |
Accessory bundles and compatibility guidance
Avoid buying a connector body without the correct contacts and backshell. Common accessory bundles to consider: crimp contact kits (with insertion/removal tools), threaded backshells with cable clamps, and sealing grommets for outdoor use. For sensor-to-controller runs, pair M12 A-coded or D-coded connectors with matching cables to maintain shielding and pin mapping.
Practical wiring diagram (ASCII)
Use this simple mapping when replacing a 4-pin M12 sensor connector - L+ (pin 1), L- (pin 3), N/O or signal (pin 4), shield to shell.
Connector face view (pins):
[ 1 ] [ 2 ]
[ 3 ] [ 4 ]
Wiring:
Pin1 -> +V (Brown)
Pin2 -> Not used / NC
Pin3 -> 0V (Blue)
Pin4 -> Signal (Black)
Shell -> Shield / EarthIf you need a datasheet or precise pinout, select the exact series on our All Products index and compare specs before purchase.
