Cannon 50 Ohm Connectors SSMB / SSMC This range of 50 ohm microminiature radio frequency connectors is suitable for both military and commercial equipment operating at frequencies up to 4 GHz (SSMB) and 12.4 GHz (SSMC). They provide a choice of Snap-on (SSMB) or Screw-on (SSMC) and are available for a wide range of flexible cables. SSMC connectors are used where a positive mechanical engagement is required and where space permits the Key Features use of torque wrenches. SSMB connectors are quick disconnect versions of the SSMC and are used in Small size applications where limited space prohibits the use of torque wrenches or when components or modules must Low mass be quickly changed to keep down time to a minimum. Close packing density Used in airborne applications MMAATTIINNGG IINNTTEERRFFAACCEE SSMB (SNAP-ON) CLOSED ENTRY CONTACT 1,91 3,10 (.075) 1,37 (.122) MIN (.054) MIN 2,67 1,35 4,83 (.105) (.053) (.190) MAX MAX MAX 0.36/0.38 (.014/.015) 0,84 1,78 0,84 (.033) (.070) 0,00 SEE NOTE (.033) MIN 0,84 MAX (.000) 2 MAX (.033) 0,00 1,91 3,10 MIN MIN RP (.000) (.075) (.122) RP MIN MIN MIN PLUG JACK SSMC (SCREW-ON) 4,32 (.170) 3,96 CLOSED ENTRY 6,40 UNF-2B MIN (.156) CONTACT 3,00 THREAD 1,37 A/F HEX (.118) 0,84 (.054) (.033) MIN MAX 2,54 2,57 (.100) (.101) MAX MIN 0,36/0,38 1,35 (.014/.015) 0,00 (.053) 2,29 0,00 0,00 6,40 UNF-2A (.000) 2,29 MIN (.090) (.000) (.000) THREAD MIN (.090) MAX MIN MIN MIN 2,29 2,29 (.090) MAX RP 5,08 RP (.090) PLUG JACK (.200) MAX MIN NOTES 2) Must meet the force to engage and 1) Inside diameter of female contact to meet VSWR, mating characteristics and disengage when mated with its connector durability, when mated with a 0,36 - 0,38 (.014 - .015) diameter male mating part. contact. Dimensions shown in mm (inch) Specifications and dimensions subject to change www.ittcannon.com 27Cannon 50 Ohm Connectors SSMB / SSMC SSPPEECCIIFFIICCAATTIIOONNSS 50 Impedance ELECTRICAL SSMB = 0 to 4.0 GHz. SSMC = 0 to 12.4 GHz Frequency Range At Sea Level = 250 Vrms. at 21km (70k feet) = 60 Vrms Voltage Rating 1000 M minimum Insulation Resistance Center Contact = 4.0 m maximum initial. 6.0 m maximum after environment Contact resistance Outer Contact = 1.0 m maximum initial. 1.5 m maximum after environment Braid to Body = 1.0 m maximum Contact Current Rating 1.0 A dc maximum Insertion Loss 0.30 dB maximum 1.5 GHz RF Leakage SSMB = -40 dB minimum 2 - 3 GHz SSMC = -50 dB minimum 2 - 3 GHz Voltage Standing Wave Ratio (VSWR) Connector Configuration To 12.4 GHz or 80% of upper cut-off SSMB SSMC frequency of the cable, whichever is lower. Cable group Straight Right Angle Straight Right Angle Applicable to 50 cables only.(F = GHz) RG178/U, 196/U 1.25 + .02F 1.25 + .03F 1.20 + .02F 1.20 + .03F RG188/U, 316/U 1.30 + .02F 1.30 + .03F 1.25 + .03F 1.30 + .02F Engagement Forces SSMB: Initial = 26.7 N (6 lbs.) max. engagement and 8.9 N(2 lbs.) minimum disengagement. MECHANICAL After 500 matings = 26.7 N (6 lbs.) max. engagement and 4.4 N (1 lb.) min. disengagement. SSMC: 0.11 Nm (16 in. oz.) torque max. Mating Torque SSMB: N/A SSMC: 0.2 Nm to 0.23 Nm (28 - 32 in.oz) Locknut Torque 0.28 Nm to 0.35 Nm (40 - 50 in. oz) Coupling Nut Retention SSMB: N/A SSMC: 111 N (25 lbs. ) minimum Materials Body, Body Components: Brass, half hard. Male and Female Contacts: Beryllium Copper. Insulators: PTFE. Lockwashers: Phosphor Bronze. Crimp Ferrule: Annealed copper alloy. Finish/Plating Center Contacts: Gold plated. Other Metal Parts: Gold or nickel plated to meet the finish and corrosion requirements of MIL-C-39012 ENVIRONMENTAL Temperature Rating -65 C to 165 C Corrosion (salt spray) MIL-STD-202, Method 101, test condition B, 5% salt solution Vibration, High Frequency MIL-STD-202, Method 204, SSMB: test condition B (15 G s). SSMC: test condition D (20 G s) Shock MIL-STD-202, Method 213, SSMB: test condition B, 75 G s 6 milliseconds, 1/2 sine. SSMC: test condition C, 100 G s 6 milliseconds, 1/2 sine. Thermal Shock MIL-STD-202, Method 107, test condition B, except high temperature shall be 85 C. High temperature shall be 200C for connectors using 200C cables. GENERAL Connector Durability 500 matings minimum Contact Captivation 8,9 N (2 lbs.) minimum axial force. Cable Retention When properly assembled to the compatible single braided coaxial cable, the retention is equal to the breaking strength of the cable. Body plating options The following part number suffices can be specified for SSMB and SSMC connectors..220 gold body ...910 nickel body Dimensions shown in mm (inch) Specifications and dimensions subject to change www.ittcannon.com 28