Coaxial Connectors (RF)

Coaxial Connectors (RF) - Terminators

Part Number	Description / PDF	Quantity
202109-10 Connex (Amphenol RF)	CONN TERMINATOR PLUG N 50OHM	1033
132360 Connex (Amphenol RF)	CONN TERMINATOR PLUG SMA 50OHM	11659
301-T75TP Triplett Test Equipment and Tools	BNC ADAPTER, MALE, 75 OHM	30
D-621-0415 TE Connectivity Aerospace Defense and Marine	D-621-0415	34
CT3339 Cal Test Electronics	CONN TERMINATOR JACK SMA	0
CT2944-93 Cal Test Electronics	CONN TERMINATOR ADAPT BNC 93 OHM	5
000-1075 Connex (Amphenol RF)	CONN TERMINATOR SMA	0
8038-6005 SV Microwave (Amphenol SV Microwave)	CONN TERMINATOR PLUG SMPS 50 OHM	0
CT2944-75 Cal Test Electronics	CONN TERMINATOR ADAPT BNC 75 OHM	0
CT3367 Cal Test Electronics	CONN TERMINATR PLUG N TYPE 50OHM	10
SF8018-6061 SV Microwave (Amphenol SV Microwave)	CONN TERMINATOR PLUG SMA 50 OHM	0
4119-75 Pomona Electronics	CONN TERMINATOR ADAPT BNC 75OHM	156
TRM-2444-MC-SMA-02 Vitelec / Cinch Connectivity Solutions	CONN TERMINATOR PLUG SMA 50 OHM	0
5221629-4 TE Connectivity AMP Connectors	CONN TERMINATOR PLUG BNC 50OHM	533
8017-6002 SV Microwave (Amphenol SV Microwave)	CONN TERMINATOR JACK BMA 50 OHM	0
8012-4013 SV Microwave (Amphenol SV Microwave)	CONN TERMINATOR JACK SMP 50 OHM	2
CGT-1400-F0-29M-02 Vitelec / Cinch Connectivity Solutions	FEMALE 2.92MM TERMINATION, 40GHZ	43
RFB-1150 RF Industries	BNC MALE; 50 OHMS	290
59K15R-001E3 Rosenberger	SMB TERMINATOR	0
CT3365 Cal Test Electronics	CONN TERMINATOR PLUG BNC 50 OHM	0

Coaxial Connectors (RF) - Terminators

1. Overview

RF coaxial connector terminators are passive components designed to match the characteristic impedance of coaxial cables and systems, preventing signal reflections that cause interference and power loss. They are critical in maintaining signal integrity in high-frequency applications. These terminators absorb transmitted energy, ensuring optimal performance in RF circuits, test systems, and communication networks.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
N-Type Terminator	50 impedance, threaded coupling, weatherproof design	Cellular base stations, microwave systems
BNC Terminator	Quick-connect bayonet style, 50/75 options	Test equipment, video systems
SMA Terminator	Subminiature threaded design, 0-18 GHz frequency range	Wireless communication modules, aerospace systems
TNC Terminator	Threaded BNC variant, vibration-resistant	Military radios, mobile networks
F-Type Terminator	75 screw-on design for CATV systems	Cable TV modems, satellite receivers

3. Structure and Components

Typical terminators consist of: - Outer conductor (copper/aluminum) for shielding - Dielectric material (PTFE/ceramic) maintaining impedance - Center conductor termination resistor (precision chip) - Threaded/snap-fit coupling mechanism - Corrosion-resistant plating (nickel/gold)

4. Key Technical Specifications

Parameter	Description	Importance
Impedance ( )	Standard 50 /75 matching	Ensures minimal signal reflection
Frequency Range	DC-18GHz for SMA, DC-11GHz for N-Type	Defines operational bandwidth
VSWR	0.1-2.0:1 ratio	Measures impedance matching quality
Power Handling	10W-500W average power	Determines thermal stability
Environmental Rating	-55 C to +165 C operating temp, IP67	Guarantees reliability in harsh conditions

5. Application Fields

Telecommunications: 5G base stations, fiber optic nodes
Broadcast: TV transmission equipment, satellite systems
Test & Measurement: Spectrum analyzers, signal generators
Aerospace: Avionics, radar systems
Industrial: Medical imaging equipment (MRI), IoT devices

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Amphenol	901-5066 SMA Terminator	18GHz, 50 , VSWR 1.1:1
TE Connectivity	N-Term-50-12 N-Type	IP68 rated, 500W power handling
Keysight Technologies	8120-0033 BNC Terminator	50 precision load for lab testing
Rosenberger	806 343S TNC Terminator	Corrosion-proof, -40 C to +125 C

7. Selection Guidelines

Key considerations: - Impedance match with system (50 vs 75 ) - Frequency requirements (check cutoff points) - Environmental conditions (temperature, moisture) - Connection type (threaded vs quick-connect) - Power dissipation needs (high-power applications require larger terminators) - Industry standards (MIL-STD, IEC, EIA)

8. Industry Trends

Current developments include: - Miniaturization for 5G mmWave applications (2.4mm, 1.85mm connectors) - Enhanced thermal management for high-power 5G arrays - Standardization of 75 terminators for automotive radar (76-81GHz) - Adoption of RoHS-compliant materials (lead-free plating) - Integration with smart monitoring systems for network health diagnostics - Development of reusable terminators for lab environments