Specifications for BNC Connectors BNC style connectors are miniature, light-weight, weatherproof interconnecting devices characterized by their two-stud, quick disconnect bayonet lock coupling arrangement. Their design functions satisfactorily from DC to 11 GHz in static applications, or from DC to 4GHz in applications involving vibration. The connectors typically yield a low VSWR (reflected signal) to 4GHz. Primary applications include radio telecommunications, broadcast equipment, medical equipment, computer, Precision Video, High definition studio broadcast, video switching and test instrumentation where frequent coupling and de-coupling are necessary. Bomars BNCs are available in an extensive variety of configurations and cable sizes and are impedance matched to either 50 ohm or 75 ohm. MATERIALS Connector Parts Material Equivalent Standard Connector Body and Parts Brass ISOCuZn38Pb2 Body Part Male Contact Pin Brass QQ-B-626 Commercial Grade Zinc Alloy/Brass -------------- Outer Contact Brass QQ-B-750 Socket Contact Beryllium Copper QQ-C-530 / MIL-H-7199 ---------- Phosphor Copper CuBe2 Crimp Ferrule Annealed Copper QQ-C-576 Insulators, Standard Versions Teflon L-P403 / BS4271 ---------- Delrin Grade B Rubber Gaskets Silicone Rubber ASTM-E1418PSI Plating Nickel (Silver Optional) MIL-G-45204 ELECTRICAL Requirement Performance Test Specification Impedance 50W 75W Frequency Range 0-4GHz 0-1 GHz ------------ VSWR 1.30 Max. MIL-C-39012 RF Insertion Loss 0.2 db Min. at 3 GHz MIL-C-39012 RF Leakage -55 db Min. at 3 GHz MIL-C-39012 Test Voltage ( At Sea Level) 1500V rms MIL-STD-202 Working Voltage ( At Sea Level ) 500V rms MIL-STD-202 Insulation Resistance 5000 Meg ohms Min. MIL-STD-202 Contact Resistance 3 Milli ohms Max. MIL-C-39012 MECHANICAL & ENVIRONMENTAL Requirement Performance Test Specification Durability 500 Insertions & Extractions Min. MIL-C-39012 Shock 50 G MIL-STD-202 Vibration 20 G from 80-2000 Hz MIL-STD-202 Cable Retention (Cable Types) 60 lbs. Minimum Pull Test MIL-C-39012 Coupling Nut 60 lbs. Maximum MIL-C-39012 Teflon: -55 to +199 C ------------ Temperature Range Delrin: -40 to +85 C ------------ Moisture Resistance Continuous Test MIL-STD-202 Salt Spray 48 Hours MIL-STD-202 Products are made to conform to the Mil standard but are for commercial applications and are not QPL FOR TECHNICAL SUPPORT: PHONE 973-347-4040 / FAX973-347-2111 Back to Index 1 3 Piece Crimp BNC three piece crimp connectors feature semi-captive contacts that click into place assuring perfect installation. Each crimp pin has a vent hole for optional soldering. Soldering is recommended for all stranded conductors 26 AWG or smaller. Part Number (I.D.) ** Fig. No. RG/U Cable (Male) 310A205A .200 In. Fig. 1 6, 21 AWG Center Conductor 310A205A18 .200 In. Fig. 1 6 CATV, 18 AWG Center Conductor 310A205F .124 In. Fig. 1 58A/U, 58C/U Stranded, 141, Thin PVC Fig.1 Fig.2 310A205FS .124 In. Fig. 1 58/U Solid Conductor 310A205FV .125 In. Fig. 2 58/U Thin-Net Plenum 310A205FV2 .125 In. Fig. 2 Mini 59, RGB Cable (23 AWG) 310A205FV3 .125 In. Fig. 2 Mini 59, RGB Cable (26 AWG) 310A204G .150 In. Fig. 1 59, 62, 210 310A205G20 .150 In. Fig. 1 RG59 20 AWG Center Cond. Fig.3 310A205G23 .150 In. Fig. 1 Belden 8241 310A205MV .125 In. Fig. 3 174, 178, 196, Mini RGB Cable 50 W 310B205MV .125 In. Fig. 3 174, 178, 196, Mini RGB Cable 75 W 310A205N .090 In. Fig. 3 179, 187 310A205P .125 In. Fig. 1 223 Fig.4 Fig.5 310B205Q .205 In. Fig. 1 Belden 8281 True 75 Ohms 310A204T .150 In. Fig. 2 59, 62, Plenum 310A208W2 .103 In. Fig.1 Mini 59, RGB Cable (26 AWG) RoHS compliant ** crimp shank Twist-On and 2 Piece Crimp BNC Twist-On connectors are field installable and require no tooling other than a stripping tool for the cable preparation. The center conductor is inserted into Bomars unique Posi- Con contact, as the connector is twisted onto the cables outer jacket. BNC 2 Piece crimp connectors make use of a fully captivated pin. Just insert the center conductor into the connector body, slide the ferrule over the braid, and apply a single hex-crimp to the ferrule. These connectors are easy to install and reliable and are recommended only for the lower data transmission speeds. Fig. Part Number Gender RG/U Cable No. 310A405A Male Fig. 8 6, Thick net 310A405F Male Fig. 8 58A/U Solid Cond, 141, Thin PVC 310A405F1 Male Fig. 8 58/U Solid Cond. -.172 - .178 Fig.8A Fig.8 310A405F2 Male Fig. 8 58/U Thin Plenum - .158 - .162 310A405F3 Male Fig. 8 Thin Plenum .150 310A405G Male Fig. 8 59, 62, 210 PVC 310A405T Male Fig. 8 59, 62, 210 Plenum 320A405F Female Fig. 8A 58 Solid (PVC) s 320A405G Female Fig. 8A 59, 62, 210 (PVC) Fig.6 Fig.7 310X205F Male Fig. 6 RG58 (PVC) s 310X205G Male Fig. 6 RG59, 62 (PVC) 320X205F Female Fig. 7 RG58 (PVC) 320X205G Female Fig. 7 RG59, 62 (PVC) RoHS compliant Standard Clamp BNC standard clamp style is a simplified version of the original military clamp style. It is required that the contact be soldered to the center conductor of the cable. Part Gender Fig. No. RG/U Cable Number 310A105A Male 9 6 310A105D Male 9 11A 310A105F Male 9 58, 58A, 58C, 141 310A105G Male 9 59, 62, 210 310A105M Male 9 174, 188, 316 320A105F* Female 10 58, 58A, 58C, 141 320A105G* Female 10 59, 62, 214 Figure 9 Figure 10 RoHS compliant Specialty Broadcast Plugs Click here for complete Broadcast Catalog Broadcast grade BNC connectors are perfectly matched to 75 ohm impedances. The superior plugs are for studio wiring and other broadcast uses. Solid precision machined brass, not die-cast, hold up under the toughest conditions. Here, we are showing the eight most popular but there are many more versions matched to the popular cable manufacturers part number. Part Number Gender Belden Cable SBC1505A Male 1505A SBC1694A Male 8281 Male 1694A SBC1695A SBC1855A Male Male 1695A 1855A SBC7731A Male 7731A SBC8218 Male 8218 SBC8241 Male 8241 SBC8281