The BNC series RF coaxial connector is a bayonet-type RF coaxial connector developed in accordance with the US military standard MIL-C-39012. It has the characteristics of rapid connection and reliable contact, and is one of the most widely used and used connectors in the world. The characteristic impedance of the BNC series RF coaxial connector is divided into 50Ω and 75Ω, and the sizes of the two different impedance connectors are matched.
Main Technical Specifications:
◆ Characteristic Impedance: 50Ω/75Ω
◆ Frequency Range: DC-4GHz(50Ω)/DC-1GHz(75Ω)
◆ Insulation Resistance: ≥5000MΩ
◆ Dielectric Withstand Voltage: 1500V(rms)
◆ Voltage Standing Wave Ratio (VSWR): ≤1.25
◆ Mating Cycles: 500 times

| Dim Ltr |
Millimeters (Inches) | |
| Minimum | Maximum | |
| A | .432 (10.97) | .436 (11.07) |
| B | .378 (9.60) | .382 (9.70) |
| C | .327 (8.31) | .333 (8.46) |
| D | .319 (8.10) | .321 (8.15) |
| F | .204 (5.18) | .208 (5.28) |
| G | .327(8.31) | .335 (8.51) |
| H | .075 (1.91) | 081(2.06) |
| 」 | .186(4.72) | .206 (5.23) |
| K | ------- | .006(0.15) |
| L | .195 (4.95) | ------- |
| M | .081 (2.06) | 087 (2.21) |
| N | .346(8.79) | .356 (9.04) |
| P | ------- | .256 (6.50) |
| R | .015 (0.38) | .030 (0.76) |
| S | .414 (10.52) | ------- |
Notes:
1. Dimensions are in inches. Metric equivalents are in parentheses.
2. Metric equivalents are given for general information only.
3. This interface shall meet the gauge requirements as specified in DSCC drawing or specification.
4. Clearance for mating connector coupling nut.
5. "P" dimension applies to that portion (if applicable) of dielectric which extends beyond references planes by dimension K.
6. "M" applies only over length "L".

| Dim Ltr |
Millimeters (Inches) | |
| Minimum | Maximum | |
| A | 385 (9.78) | .390 (9.91) |
| B | Gauge test | |
| D | .052 (1.32) | .054 (1.37) |
| E | .210 (5.33) | .230 (5.84) |
| G | .091(2.31) | .097 (2.46) |
| H | .463 (11.76) | .473 (12.01) |
| H alternate | .394 (10.01) | .400 (10.16) |
| J | .124(3.15) | ------- |
| K | .091(2.31) | .097 (2.46) |
| L | .003 (0.08) | ------- |
| M | .018 (0.46) | .022 (0.56) |
| N | ------- | .025 (0.64) |
| P | .208 (5.28) | ------- |
| Q | .078 (1.98) | ------- |
| T | .045 (1.14) | .049 (1.24) |
| U | .180(4.57) | .184 (4.67) |
Notes:
1. Dimensions are in inches. Metric equivalents are in parentheses.
2. Metric equivalents are given for general information only.
3. In the mated condition, the longitudinal force of the spring of the coupling mechanism shall exceed the pressure exerted by the sealing gasket by an amount necessary to linsure butting of the outer contacts at the reference plane.
4. This interface shall meet the gauge requirements as specified.
| Model | Cable type |
| BNC-JB3 | SFT-50-3、670-141 |
| Model | Cable type |
| BNC-KB3 | SFT-50-3,670-141 |
| Model | Cable type | d |
| BNC-KYB2 | SFT-50-2,670-086 | Φ2.2 |
| BNC-KYB3 | SFT-50-2,670-141 | Φ3.6 |
| Model | Cable type |
| BNC-J3 | SYV-50-2-1,RG316 |
| BNC-J4 | SYV-50-2-2 |
| BNC-J5,(K)5 | SYV-50-3,SFCJ-50-3-51,RG142 |
| BNC-J7 | SYV-50-5-1,SFCJ-50-5-51 |
| BNC-J10 | SYV-50-7-1,SYV-50-7-2,SFCJ-50-7-51 |
| Model | Cable type |
| BNC-J3Y | SYV-50-2-1 |
| BNC-J5Y | SYV-50-3 |
| Model | Cable type |
| BNC-J12 | SYV-75-3 |
| Model | Cable type |
| BNC-75J13Y | SYV-75-5 |
| Model | Cable type |
| BNC-JW3Y | SYV-50-2-1,RG316 |
| Model | Cable type |
| BNC-KF3 | SYV-50-2-1,RG316 |
| BNC-KF4 | SYV-50-2-2 |
| BNC-KF5 | SYV-50-3,SFCJ-50-3-51,RG142 |
| Model | Cable type |
| BNC-KY3 | SYV-50-2-1,RG316 |
| BNC-KY4 | SYV-50-2-2 |
| BNC-KY5 | SYV-50-3,SFCJ-50-3-51,RG142 |
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