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AMPHENOL RF 3148901 BNC Connector

Amphenol's 31-4890-1 BNC connector is a miniature RF connector developed in the late 1940s. It utilizes a bayonet coupling mechanism for quick and reliable connections, making it ideal for cable termination in applications such as medical equipment, test instrumentation, antennas, and base stations. Available in 50Ω and 75Ω impedance designs, and various termination styles, these connectors offer versatility and performance for a wide range of industrial and commercial applications. Military grade versions are produced to MIL-C-39012 specifications.

Authorized Distributors
Part No:31-4890-1
Stock:41
Inv Date:05-28-2026
Price: Unit price: $41.92
Buy/RFQ:
Part No:31-4890-1
Stock:41
Inv Date:05-28-2026
Price: Unit price: $41.92
Buy/RFQ:

AMPHENOL RF 3148901 BNC Connector Specifications:

  • Impedance: 50 Ω nominal
  • Frequency Range: DC - 4 GHz (usable to 11 GHz)
  • VSWR: 1.3 max. @ DC - 4 GHz (straight)
  • RF Leakage: 55 dB minimum @ 3 GHz
  • Voltage Rating: ≥ 500 V peak (depending on cable)
  • Contact Resistance: {'Center Contact': '≤ 1.5 mΩ', 'Outer Contact': '≤ 0.2 mΩ', 'Braid to Body': '≤ 0.1 mΩ'}
  • Insulation Resistance: 5,000 MΩ minimum
  • Insertion Loss: maximum 0.2 dB max. @ 3 GHz
  • Dielectric Withstanding Voltage: 1,500 Vrms (at sea level)
  • Mating: 2-stud bayonet lock coupling (MIL-STD-348)
  • Coupling Torque: 0.6 / 2.5 in-lbs (7 / 28 N-cm)
  • Coupling Nut Retention Force: 101 lbs (450N) min.
  • Center Contact Retention Force: ≥ 6.1 lbs (27N)
  • Body and Outer Contacts: Brass, nickel plated
  • Male Contact: Brass, gold plated
  • Female Contact: Beryllium copper or phosphor bronze, gold or silver plated
  • Insulator: PTFE, copolymer of styrene

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Frequently Asked Questions

Where can I buy AMPHENOL RF 3148901?

You can click on the BUY or RFQ button to purchase 3148901 from an authorized AMPHENOL RF distributor.

How do I troubleshoot issues or seek technical support for part 3148901?

You can download the 3148901 datasheet or visit the AMPHENOL RF website for support.

Who is the manufacturer of 3148901?

AMPHENOL RF

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