Description
The M4 series is a specialized subminiature RF interface designed for the high-density requirements of modern digital telephony and radio frequency distribution. This male (plug) variant is specifically calibrated for micro-diameter cables, including the low-loss LMR100, flexible RG174, and high-temperature RG316. The M4 interface is highly regarded in telecommunications for providing a secure, threaded connection that offers superior mechanical stability compared to push-pull alternatives in high-vibration environments.
This connector utilizes a high-reliability dual-crimp termination system for both the center pin and the outer ferrule. This ensures a gas-tight mechanical bond, maintaining a consistent 75-Ohm impedance and providing excellent pull-off resistance—crucial for mission-critical E1, E3, and DS3 digital transmission circuits. Manufactured with a gold-plated brass body and premium PTFE (Teflon) insulation, it delivers exceptional signal integrity and low return loss up to 3 GHz, protecting sensitive data streams from electromagnetic interference (EMI) and signal jitter.
Key Technical Advantages
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Threaded Mechanical Security: The screw-on coupling mechanism ensures a vibration-proof connection, preventing signal interruptions caused by accidental cable movement or mechanical stress.
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Micro-Cable Precision Fit: Engineered specifically for the dimensions of LMR100, RG174, and RG316 (approx. 2.5mm–2.8mm OD), ensuring a seamless electrical transition and minimal signal reflection.
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75-Ohm System Integrity: Optimized to maintain strict impedance matching, preventing bit errors and signal reflections in high-capacity digital telephony and broadcast circuits.
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Rapid Dual-Crimp Assembly: The industrial-grade crimp design for both the center contact and outer sleeve provides a high-strength, repeatable termination ideal for large-scale infrastructure deployments.
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Superior Corrosion Protection: Premium gold-over-nickel plating on all critical surfaces ensures low contact resistance and long-term durability in professional networking environments.
Key Features
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Interface Type: M4 Male (Plug) with 75-Ohm threaded coupling.
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Termination Method: Dual-crimp (center pin and outer ferrule) for high-reliability mechanical bonding.
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Cable Compatibility: Optimized for LMR100, RG174, and RG316 75-Ohm coaxial cables.
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Premium Construction: Features a gold-plated brass body and a high-performance PTFE dielectric for electrical stability.
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Industrial Application: Ideal for high-density Digital Distribution Frames (DDF), telephony exchanges, and cellular base station equipment.
Technical Summary
| Parameter | Specification |
| Impedance | 75 Ohm |
| Frequency Range | DC – 3 GHz |
| Body Material | Brass (Gold Plated) |
| Contact Material | Brass (Gold Plated) |
| Coupling Mechanism | Threaded (Screw-on) |
| Insulator | PTFE (Teflon) |
| Operating Temp | -40°C ~ +85°C |
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