TNC Series



Table of contents

  TNC connectors are based on MIL-C-39012 requirements.
  They have the same inner interface design as the BNC.
  The only difference is the thread mating which ensures the working frequency is up to 11 GHz for 50 Ohm.
  Due to the thread mating design, TNC's can withstand more vibration load than BNC's.

Plug interface

Jack interface

Click to see dimensions

Click to see dimensions



Brass, nickel plated

Center contact

Brass (male)/BeCu or PhBz (female), gold plated



Crimp ferrule

Annealed copper, nickel plated


Silicone rubber



50 Ohm

Frequency range

0 ~ 11 GHz

Working voltage

500V rms max
RG174, 188, 316 = 250V rms @sea level max
RG178 = 170V rms @sea level max
RG58 = 335V rms @sea level max

Insulation resistance

5000 MOhm min

Dielectric withstanding voltage

1500V rms min
RG174, 188, 316 = 750V rms min
RG178 = 500V rms min
RG58 = 1000V rms min

Contact resistance

Center contact = 1.5 mOhm max
Outer contact = 1.0 mOhm max


1.3 max

Insertion loss

0.2 x (f) GHz  dB  max @3.0 GHz



Screw type coupling mechanism

Coupling nut retention force

100 lbs min

Coupling proof torque

15.0 in/lbs min (for plug only)


500 matings

Cable retention force

Non-crimp = 40 lbs min
RG174 = 12.1 lbs min
RG178 = 7.3 lbs min
RG58 = 28.7 lbs min


Corrosion (Sail spray)

MIL-STD-202F, Method 101D, Condition B

Thermal shock

MIL-STD-202F, Method 1017G, Condition B


MIL-STD-202F, Method 204D, Condition B

Mechanical shock

MIL-STD-202F, Method 213B, Condition A

Alpha Center
351 Irving Drive, Oxnard, CA 93030, USA

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