# RF Coaxial Connector Guide: SMA, BNC, N-Type, TNC and More

- Published: 2026-11-12
- Author: Intorfilters team
- URL: https://intorfilters.com/rf-coaxial-connector-guide/

> Frequency limits, sizes, impedance and coupling styles of the RF connectors buyers ask about most.

Key points

- Match impedance first: 50 Ω for RF and test, 75 Ω for video and CATV.
- Each series has a frequency ceiling — SMA to 18 GHz, N-type to 11 GHz, BNC to 4 GHz typically.
- RP (reverse polarity) versions do not mate with standard ones.

| Series | Coupling | Typical max frequency | Use |
| --- | --- | --- | --- |
| SMA / RP-SMA | Thread | 18 GHz | Antennas, modules, test |
| BNC | Bayonet | 4 GHz | CCTV, instruments |
| TNC | Thread | 11 GHz | Vibration-prone radio |
| N-type | Thread | 11 GHz | Base stations, outdoor |
| 4.3-10 / 7/16 DIN | Thread / push | 6 GHz | Cellular infrastructure, low PIM |
| MCX / MMCX / U.FL | Snap | 6 GHz | Compact devices, GPS |
| 2.92 / 2.4 mm | Thread | 40–50 GHz | Microwave test |

## Adapters

[Between-series adapters](https://intorfilters.com/connectors/rf-coaxial-connectors/bnc-tnc-n-type-adapters/) let you join different families, at the cost of some loss and VSWR. Keep them out of high-power or precision paths.

Background: [coaxial connectors on Wikipedia](https://en.wikipedia.org/wiki/Coaxial_connector). Browse [SMA and miniature RF](https://intorfilters.com/connectors/rf-coaxial-connectors/sma-smb-miniature-rf/) and [microwave connectors](https://intorfilters.com/connectors/rf-coaxial-connectors/rf-microwave-connectors/).

**Examples from our sma, smb, smc & miniature rf connectors range**  — [see all 1,173 →](https://intorfilters.com/connectors/rf-coaxial-connectors/sma-smb-miniature-rf/)

![Yuv Certified Female SMB Audio Connector for Car Antenna Applications](https://intorfilters.com/wp-content/uploads/2026/electronic-connectors-product-images/Yuv-Certified-Female-SMB-Audio-Connector-for-Car-Antenna-Applications.webp)

SMA, SMB, SMC & Miniature RF Connectors

### [Yuv Certified Female SMB Audio Connector for Car Antenna Applications](https://intorfilters.com/product/yuv-certified-female-smb-audio-connector-for-car-antenna-applications/)

Generally Coaxial Connector · BNC

**US$0.36** MOQ 100 pieces

![Yeonho 20037wr SMT SMA Connector Monitor Digital TV](https://intorfilters.com/wp-content/uploads/2026/electronic-connectors-product-images/Yeonho-20037wr-SMT-SMA-Connector-Monitor-Digital-TV.webp)

SMA, SMB, SMC & Miniature RF Connectors

### [Yeonho 20037wr SMT SMA Connector Monitor Digital TV](https://intorfilters.com/product/yeonho-20037wr-smt-sma-connector-monitor-digital-tv/)

Male,Female · Power, Automobile, RF, Audio & Video, PCB, Microwave, FP…

**US$0.0001 – 0.024** MOQ 1,000 pieces

![Y-Type Splitter SMA Male to Dual SMA Female Cable Adapter](https://intorfilters.com/wp-content/uploads/2026/electronic-connectors-product-images/Y-Type-Splitter-SMA-Male-to-Dual-SMA-Female-Cable-Adapter.webp)

SMA, SMB, SMC & Miniature RF Connectors

### [Y-Type Splitter SMA Male to Dual SMA Female Cable Adapter](https://intorfilters.com/product/y-type-splitter-sma-male-to-dual-sma-female-cable-adapter/)

Coaxial · Multimedia, DVD Player

**US$2.40 – 2.64** MOQ 10 pieces

![Wr650 Ef RF Waveguide to Coaxial Adapter with N SMA 7/16 Connector](https://intorfilters.com/wp-content/uploads/2026/electronic-connectors-product-images/Wr650-Ef-RF-Waveguide-to-Coaxial-Adapter-with-N-SMA-7-16-Connector.webp)

SMA, SMB, SMC & Miniature RF Connectors

### [Wr650 Ef RF Waveguide to Coaxial Adapter with N SMA 7/16 Connector](https://intorfilters.com/product/wr650-ef-rf-waveguide-to-coaxial-adapter-with-n-sma-7-16-connector/)

Optical · SMA-Female

**US$336.00 – 804.00** MOQ 1 piece

![Wireless GSM Internal More Car Portable SMA Male Connector with 1.37gray Cable](https://intorfilters.com/wp-content/uploads/2026/electronic-connectors-product-images/Wireless-GSM-Internal-More-Car-Portable-SMA-Male-Connector-with-1-37gray-Cable.webp)

SMA, SMB, SMC & Miniature RF Connectors

### [Wireless GSM Internal More Car Portable SMA Male Connector with 1.37gray Cable](https://intorfilters.com/product/wireless-gsm-internal-more-car-portable-sma-male-connector-with-1-37gray-cable/)

Cat 5 · Gold Plated

**US$0.84 – 1.32** MOQ 500 pieces

![WiFi Antenna Omnidirectional Antenna 824-6920 & 1700-2700MHz, 2dBi/3dBi Gain SMA-J Connector](https://intorfilters.com/wp-content/uploads/2026/electronic-connectors-product-images/WiFi-Antenna-Omnidirectional-Antenna-824-6920-1700-2700MHz-2dBi-3dBi-Gain-SMA-J-Connector.webp)

SMA, SMB, SMC & Miniature RF Connectors

### [WiFi Antenna Omnidirectional Antenna 824-6920 & 1700-2700MHz, 2dBi/3dBi Gain SMA-J Connector](https://intorfilters.com/product/wifi-antenna-omnidirectional-antenna-824-6920-1700-2700mhz-2dbi-3dbi-gain-sma-j-connector/)

ABS · 2-3 dBi

**US$0.30 – 0.60** MOQ 100 pieces

## Frequently asked questions

### Can a 75 Ω BNC mate with a 50 Ω BNC?

Mechanically yes, but the impedance mismatch causes reflections at higher frequencies. Use the matching version.

### What is RP-SMA?

Reverse-polarity SMA swaps the pin and socket while keeping the thread gender; it is common on Wi-Fi equipment.

### Find these products in our catalog

[SMA, SMB, SMC & Miniature RF Connectors](https://intorfilters.com/connectors/rf-coaxial-connectors/sma-smb-miniature-rf/) · [BNC, TNC, N-Type & RF Adapters](https://intorfilters.com/connectors/rf-coaxial-connectors/bnc-tnc-n-type-adapters/) · [RF & Microwave Connectors](https://intorfilters.com/connectors/rf-coaxial-connectors/rf-microwave-connectors/)

[Request a quote or sample](https://intorfilters.com/request-quote/)

## Contact & ordering

- Request a quote: https://intorfilters.com/request-quote/
- E-mail: info@intorfilters.com
- Product catalog: https://intorfilters.com/products.md
- Site guide for AI assistants: https://intorfilters.com/llms.txt