Description
The SMZ Male (Plug) Crimp Connector is a specialized 75-Ohm RF interface designed specifically for the digital telephony and telecommunications sectors. Widely known as the BT43 connector, the SMZ series provides a more robust and larger-scale interface than the standard SMB, specifically tuned to maintain 75-Ohm impedance for digital signals such as E1, E3, and DS3. This crimp-style variant is optimized for high-volume field installations, offering a fast and highly repeatable termination process for micro-diameter cables.
Precision-machined for the exact geometry of LMR100, RG174, and RG316 cables, this connector utilizes a dual-crimp termination for the center pin and the outer ferrule. This ensures a gas-tight, vibration-resistant mechanical bond that maintains signal integrity even in high-density distribution environments. The snap-on coupling mechanism allows for quick “push-to-lock” mating with SMZ female jacks, providing a secure electrical connection with a distinct tactile click. Manufactured with a gold-plated brass body and premium PTFE (Teflon) insulation, it ensures low insertion loss and superior protection against environmental oxidation.
Key Technical Advantages
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75-Ohm Impedance Precision: Specifically engineered for telecommunications standards, minimizing return loss and preventing data errors in high-speed digital circuits.
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Micro-Cable Compatibility: Precision-calibrated for the dimensions of LMR100, RG174, and RG316 (approx. 2.5mm–2.8mm OD), ensuring a secure mechanical grip and optimized signal path.
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High-Strength Dual Crimp: The industrial crimp design for both the center contact and outer sleeve provides maximum pull-off resistance and excellent EMI/RFI shielding.
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Telecommunications Grade Reliability: Designed for the rigors of central office exchanges, providing a more substantial mechanical lock than standard 75-Ohm SMB connectors.
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Corrosion-Resistant Gold Plating: Premium gold-over-nickel plating on critical contact surfaces ensures low contact resistance and long-term durability in critical infrastructure.
Key Features
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Interface Type: SMZ Male (Plug) with 75-Ohm snap-on coupling (BT43 Standard).
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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 coaxial cables.
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Premium Construction: Features a gold-plated brass body and PTFE dielectric for high-frequency electrical stability.
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Industrial Application: Primarily used in Digital Distribution Frames (DDF), telephony racks, and high-speed data exchange equipment.
Technical Summary
| Parameter | Specification |
| Impedance | 75 Ohm |
| Frequency Range | DC – 2 GHz (Optimized for Telephony) |
| Body Material | Brass (Gold Plated) |
| Contact Material | Brass (Gold Plated) |
| Insulator | PTFE (Teflon) |
| Termination Style | Dual Crimp (Pin & Ferrule) |
| Operating Temp | -40°C ~ +85°C |







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