How do I choose the right connector type for my project?

Select a connector based on the application (power, signal, board-to-board, cable-to-cable), required number of contacts, current and voltage ratings, mechanical mating style, and environmental factors such as exposure and movement; consult the product datasheet for dimensions and pinout before ordering.

What should I consider when selecting cable and wire size?

Choose wire by current-carrying capacity (AWG or mm²), voltage rating, insulation temperature and chemical resistance, and flexibility (stranded for movement); use shielded cable for sensitive or long signal runs and check manufacturer ampacity charts for guidance.

When should I crimp, solder or use screw terminals for connections?

Use crimped terminals with the correct ferrules and a suitable ratchet crimper for reliable mechanical and electrical connections, solder for permanent joints on PCBs or cables, and screw terminals when you need serviceable or frequently changed connections.

Can I collect connectors and cables from a branch and get a VAT invoice?

Yes — Communica offers branch collection from Samrand (head office/warehouse), Pretoria (CBD) and Cape Town where available; check the product page for stock status and lead times or contact your local branch, and request a VAT invoice at checkout or from sales if you need one for procurement or education purchases.

How do I confirm connector and cable compatibility before buying?

Compare manufacturer part numbers and datasheets for mating dimensions, pitch, contact plating, current/voltage ratings and cable termination requirements; if you are unsure, provide project details or part numbers to Communica staff for assistance in selecting compatible parts.

Order Coaxial Cable Online in South Africa - Fast Local Stock & Expert Guidance

Order coaxial cable online from Communica - fast local stock, connector bundles, branch pickup and expert spec guidance for makers, students and engineers.

Published:June 7, 2026

3 min read

Image supplied by 123RF

Local Stock & Pickup

Collect same-day from Samrand, Pretoria or Cape Town when available.

Spec-Driven Choices

Compare impedance, attenuation and connector fit before ordering.

Bundles & Support

Connector kits, crimp tools and quote support for education and projects.

Why choose Communica for ordering coaxial cable online

Finding the right coaxial cable for RF, CCTV, test setups or antenna work is about more than length - it’s about impedance, loss, shielding and connector fit. At Communica we combine broad brand choice with local availability, branch pickup options in Samrand, Pretoria and Cape Town, and support that helps students, makers and engineering teams get the correct parts quickly. Order online and check stock, or collect from a branch to avoid shipping delays.

Quick benefits

Local stock reduces lead times for project deadlines and classroom labs.
Clear spec sheets and compatibility notes for RG-58, RG-6, LMR-series and more.
Connector and accessory bundles (BNC, SMA, crimp kits) to finish installations cleanly.

Choosing the right coax: specs that matter

When you order coaxial cable online, confirm these four core specifications: impedance, velocity factor, attenuation (dB per metre) and shield coverage. Below is a compact spec comparison to use when selecting between common types.

Type	Nominal Impedance	Typical Use	Key trait
RG-58	50 ohm	Low-power RF, test leads	Flexible, moderate loss
RG-6	75 ohm	Cable TV, CCTV	Lower loss for video
LMR-400	50 ohm	Antennas, long runs	Low attenuation, larger diameter

Simple attenuation math

Estimate received power loss over a run with: Loss (dB) = attenuation (dB/m) × length (m). For RF link budgets, convert dB to power ratio: Pout/Pin = 10^{(-Loss/10)}. Use these to decide when a thicker, lower-loss cable (e.g., LMR-400) offsets extra cable cost.

Connector compatibility and termination

Match impedance and mechanical fit: 50 ohm cables use SMA, N or BNC (50 ohm versions); 75 ohm runs use F-type or 75 ohm BNC. Consider crimp vs solder terminations - crimp kits and ferrules are available in accessory bundles for rapid, repeatable installs.

Explore product categories and check stock using our collections for cable, connectors and tools: Shop by Category and browse all available items at All Products.

Practical ordering advice and accessory bundles

For hobbyists and labs, buy cable in standard reel lengths to reduce joins and signal loss. Order with connector-ready ends or as bulk and add a termination kit. Typical useful bundles include: bulk RG-58 with BNC crimp kit, RG-6 with compression F connectors for CCTV, and LMR-400 with N-type connectors for external antennas.

Wiring diagram examples

Basic coax termination (center conductor and shield):

Coax end view:  _________ |         | |  O---+  |  <- center conductor (pin) |     |   | |  ---+   |  <- shield braid (ground) |_________|Connector attaches to both features depending on type.

Troubleshooting common issues

If you see intermittent signal or high SWR: check for poor crimps, nicked dielectric, incorrect impedance connectors, or multiple mismatched joins. Use a TDR or SWR meter from the test and measurement range to locate faults quickly.

Need stock availability for urgent projects? Check real-time branch inventory and trading hours at Branches & Trading Hours. For background on our service and heritage that supports South African education and industry needs, visit our About Us.

Objections handled and final reassurance

Worried about ordering the wrong cable? Use our coaxial cable product pages and spec tables, or request a coaxial cable quote for bulk or education purchases - we support VAT invoicing for institutions. Concerned about delivery times? Choose branch collection from Samrand or other locations to start your project the same day when stock is available.

Summary and next steps

Ordering coaxial cable online should save time and reduce risk. Communica offers deep category coverage, connector and tool bundles, and local pickup to keep your build on schedule. Compare specs, check local stock, or request a tailored quote for classroom sets or multi-run installations. Shop now for cable and accessories, check stock in Samrand, or request a quote to secure the parts you need.

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Communica Samrand — Electronic Component Experts

Communica supplies semiconductors and electronic components to industries such as automotive, electrical, automation, mining, and education.

Last updated: June 7, 2026

Disclaimer: This content is for educational purposes only. Product availability, pricing, and specifications are subject to change. Always verify current details on the retailer's website before making a purchase. We may earn affiliate commissions from qualifying purchases.

ZAR 4.89

Coax Cable 75r Satellite Cable White Dstv Approved

Communica South Africa

Communica is a wholesale and retail distributor of semiconductors, electromechanical and passive electronic components for automotives, electronics, electrical, automation, mining and process control industries and technical and tertiary educational institutions.

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Frequently Asked Questions

Get answers to common questions about Connectors Wire And Cable

Why Choose Communica?

*Free Shipping

Free shipping for orders over ZAR 1,000.00.

7-Day Returns

Get a full refund if you had the product for less than 7 days.

Quick Delivery

Nationwide delivery within 2 - 4 working days.

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Why choose Communica for ordering coaxial cable online

Quick benefits

Local stock reduces lead times for project deadlines and classroom labs.
Clear spec sheets and compatibility notes for RG-58, RG-6, LMR-series and more.
Connector and accessory bundles (BNC, SMA, crimp kits) to finish installations cleanly.

Choosing the right coax: specs that matter

Type	Nominal Impedance	Typical Use	Key trait
RG-58	50 ohm	Low-power RF, test leads	Flexible, moderate loss
RG-6	75 ohm	Cable TV, CCTV	Lower loss for video
LMR-400	50 ohm	Antennas, long runs	Low attenuation, larger diameter

Simple attenuation math

Connector compatibility and termination

Explore product categories and check stock using our collections for cable, connectors and tools: Shop by Category and browse all available items at All Products.

Practical ordering advice and accessory bundles

Wiring diagram examples

Basic coax termination (center conductor and shield):

Coax end view:  _________ |         | |  O---+  |  <- center conductor (pin) |     |   | |  ---+   |  <- shield braid (ground) |_________|Connector attaches to both features depending on type.

Troubleshooting common issues

Objections handled and final reassurance

Summary and next steps

Shop Now

Order Coaxial Cable Online in South Africa - Fast Local Stock & Expert Guidance

Local Stock & Pickup

Spec-Driven Choices

Bundles & Support

Why choose Communica for ordering coaxial cable online

Quick benefits

Choosing the right coax: specs that matter

Simple attenuation math

Connector compatibility and termination

Practical ordering advice and accessory bundles

Wiring diagram examples

Troubleshooting common issues

Objections handled and final reassurance

Summary and next steps

Communica South Africa

Frequently Asked Questions

How do I choose the right connector type for my project?

How do I choose the right connector type for my project?

What should I consider when selecting cable and wire size?

What should I consider when selecting cable and wire size?

When should I crimp, solder or use screw terminals for connections?

When should I crimp, solder or use screw terminals for connections?

Can I collect connectors and cables from a branch and get a VAT invoice?

Can I collect connectors and cables from a branch and get a VAT invoice?

How do I confirm connector and cable compatibility before buying?

How do I confirm connector and cable compatibility before buying?

Why Choose Communica?

*Free Shipping

7-Day Returns

Quick Delivery

Order Coaxial Cable Online in South Africa - Fast Local Stock & Expert Guidance

Local Stock & Pickup

Spec-Driven Choices

Bundles & Support

Why choose Communica for ordering coaxial cable online

Quick benefits

Choosing the right coax: specs that matter

Simple attenuation math

Connector compatibility and termination

Practical ordering advice and accessory bundles

Wiring diagram examples

Troubleshooting common issues

Objections handled and final reassurance

Summary and next steps

Communica South Africa

Frequently Asked Questions

How do I choose the right connector type for my project?

How do I choose the right connector type for my project?

What should I consider when selecting cable and wire size?

What should I consider when selecting cable and wire size?

When should I crimp, solder or use screw terminals for connections?

When should I crimp, solder or use screw terminals for connections?

Can I collect connectors and cables from a branch and get a VAT invoice?

Can I collect connectors and cables from a branch and get a VAT invoice?

How do I confirm connector and cable compatibility before buying?

How do I confirm connector and cable compatibility before buying?

Why Choose Communica?

*Free Shipping

7-Day Returns

Quick Delivery

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