The TNC (Threaded Neill-Concelman) connector is a threaded version of the BNC connector. The connector has a 50 Ω impedance and operates best in the 0–11 GHz frequency spectrum. It has better performance than the BNC connector at microwave frequencies.
Invented in the late 1950s, the TNC connector has been employed in a wide range of radio and wired applications.
| Requirement | MIL-C-39012 Paragraph | Specification |
| ELECTRICAL DATA | ||
| Impedance | 50Ω, 75Ω | |
| Frequency range | DC 11GHz, DC 1GHz | |
| Contact current | DC 3.5A max. | |
| Voltage rating | 250V rms | |
| Contact resistance | 3-16 | Center contacts : 2.0 mΩ |
| Outer contacts : 0.2mΩ | ||
| Insulation resistance | 3-11 | 5000MΩmin. |
| Insertion loss | 3-27 | 0.18dB max. at 9GHz |
| V.S.W.R | 3-14 | ≤ 1.5 |
| MECHANICAL DATA | ||
| Coupling nut torque | 20Ncm-170Ncm | |
| Life | 500 matings. | |
| Contact captivation | 3-14 | ≥ 27N |
| Proof torque | Not applicable | |
| ENVIRONMENTAL DATA | ||
| Temperature range | : -65℃~+125℃ | |
| Corrosion resistance | 3-13 | MIL-STD-202, Method 101,Condition B. |
| Moisture resistance | 3-21 | MIL-STD-202, Method 106. |
| Thermal shock | 3-20 | MIL-STD-202, Method 107,Condition B. |
| Vibration | 3-18 | MIL-STD-202. Method 204,Condition B. |
| Shock | 3-19 | MIL-STD-202. Method 213,Condition G. |
| MATERIALS | ||
| Bodies and Male contacts | Brass | |
| Female contacts | Beryllium copper | |
| Insulators | PTFE Teflon | |
| Gasket | Silicone Rubber | |
| PLATINGS | ||
| Bodies, Coupling nuts | Nickel plated | |
| Center contacts | Gold plated | |