Coaxial Connectors (RF)

Coaxial Connectors (RF) - Terminators

Part Number	Description / PDF	Quantity
147-0701-801 Vitelec / Cinch Connectivity Solutions	TERMINATOR JACK 2.4MM 50OHM	25
3840-75 Pomona Electronics	CONN TERMINATOR PLUG BNC 75OHM	20
CT3335-50 Cal Test Electronics	CONN TERMINATR PLUG N TYPE 50OHM	0
4119-50 Pomona Electronics	CONN TERMINATOR ADAPT BNC 50OHM	201
SF8012-6103 SV Microwave (Amphenol SV Microwave)	CONN TERMINATOR PLUG SMP 50 OHM	0
TRM-2090-M0-SMA-02 Vitelec / Cinch Connectivity Solutions	CONN TERMINATOR PLUG SMA 50 OHM	6
000-35650-51 Connex (Amphenol RF)	CONN TERMINATOR PLUG BNC 51OHM	81
51S1RR-001N4 Rosenberger	CONN TERMINATOR PLUG BNC 50OHM	28
227997-1 TE Connectivity AMP Connectors	CONN TERMINATOR JACK N 50OHM	0
R404N61000 Radiall USA, Inc.	TERM SMP M 18 GHZ 1W	5
SF8015-6002 SV Microwave (Amphenol SV Microwave)	CONN TERMINATR PLUG 2.92MM 50OHM	175
8012-4006 SV Microwave (Amphenol SV Microwave)	CONN TERMINATOR JACK SMP 50 OHM	0
221629-5 TE Connectivity AMP Connectors	CONN TERMINATOR PLUG BNC 75OHM	295
202117RP Connex (Amphenol RF)	CONN TERMINATR PLUG RP-TNC 50OHM	14
46650-51 Connex (Amphenol RF)	CONN TERMINATOR PLUG BNC 51OHM	5
142270 Connex (Amphenol RF)	CONN TERMINATOR	0
53S17R-001N3 Rosenberger	CONN TERMINATOR PLUG N 50OHM	14
53K15R-005N3 Rosenberger	N TYPE TERMINATOR	0
D-621-0460 TE Connectivity Aerospace Defense and Marine	D-621-0460	32
531-40172 Connex (Amphenol RF)	F-TYPE TERMINATION 1/4 WATT, 75	6

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