BNC Female to TNC Male adapter is a specialized coaxial RF (Radio Frequency) component designed to facilitate the interconnection between devices or cables equipped with different types of connectors. Specifically, it converts a BNC (Bayonet Neill-Concelman) female interface into a TNC (Threaded Neill-Concelman) male interface. This “between-series” adapter is commonly used when there’s a need to connect a BNC-terminated cable or equipment to a TNC-equipped system, or vice versa, without altering the existing cable assemblies. Both BNC and TNC connectors are typically 50 Ohm impedance, ensuring good signal matching and minimal loss across the adapter. The BNC side features a quick connect/disconnect bayonet coupling, while the TNC side utilizes a threaded coupling for a more secure and vibration-resistant connection. These adapters are widely used in various RF applications, including wireless data transmission, test and measurement, and radio communication, where flexible connectivity between different connector types is required.
Technical Specification
1. Electrical Characteristics:
- Impedance: 50 Ohms (Ω) (Both BNC and TNC are commonly 50 Ohm; 75 Ohm versions of BNC exist but are distinct and would require a 75 Ohm TNC equivalent, which is less common for TNC).
- Frequency Range: DC to 4 GHz (typical), with some high-performance adapters capable of extending up to 6 GHz.
- VSWR (Voltage Standing Wave Ratio):
- Typically ≤1.25:1 up to 3 GHz
- ≤1.40:1 up to 4 GHz
- Insertion Loss: Low, typically ≤0.15 dB at 3 GHz (minimal signal loss across the adapter).
- Return Loss: High, typically ≥18 dB at 3 GHz.
- Working Voltage: 500 V RMS (at sea level)
- Dielectric Withstanding Voltage: 1500 V RMS (at sea level)
- Insulation Resistance: ≥5000 M$\Omega$
- Contact Resistance:
- Center Contact: ≤1.5 m$\Omega$ (BNC side), ≤1.0 m$\Omega$ (TNC side)
- Outer Contact: ≤1.0 m$\Omega$ (BNC side), ≤0.5 m$\Omega$ (TNC side)
2. Mechanical Characteristics:
- Connector Type (Input): BNC Female (Jack/Receptacle)
- Connector Type (Output): TNC Male (Plug)
- Mating Interface Standards:
- BNC: Per MIL-STD-348B/301 or IEC 61169-8
- TNC: Per MIL-STD-348B/303 or IEC 61169-17
- Coupling Mechanisms:
- BNC Side: Bayonet (quick connect/disconnect)
- TNC Side: Threaded Coupling (7/16-28 UNEF-2A thread)
- Body Style: Straight adapter
- Durability (Mating Cycles):
- BNC Side: ≥500 cycles
- TNC Side: ≥500 cycles
3. Materials and Finishes:
- Body: Brass, Nickel Plated (typically 100 µin min for corrosion resistance)
- Center Contacts: Brass or Beryllium Copper, Gold Plated (typically 3-50 µin over Nickel for optimal conductivity and wear resistance)
- Insulators: PTFE (Polytetrafluoroethylene / Teflon) for excellent electrical properties and high-temperature performance.
4. Environmental Characteristics:
- Operating Temperature Range: −65∘C to +165∘C (with PTFE insulator)
- Thermal Shock: MIL-STD-202, Method 107, Condition B
- Vibration: MIL-STD-202, Method 204, Condition D
- Mechanical Shock: MIL-STD-202, Method 213, Condition I
- Moisture Resistance: MIL-STD-202, Method 106
- Corrosion (Salt Spray): MIL-STD-202, Method 101, Condition B (48 hours)
There are no reviews yet.