ca_I1-I40.qxd:Layout 1 2/10/11 8:43 AM Page 1 ca_I1-I40.qxd:Layout 1 2/10/11 8:44 AM Page 27 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 use of torque wrenches. SSMB connectors are quick disconnect versions of the SSMC and are used in applications where limited space prohibits the use of torque wrenches or when components or modules must be quickly changed to keep down time to a minimum. Key Features • Small size • Low mass • Close packing density I • Used in airborne applications RF Mating Interface SSMB (SNAP-ON) CLOSED ENTRY CONTACT 3,10 (.122) Ø1,37 (.054) MIN Ø1,35 (.053) MAX Ø4,83 (.190) MAX 1,91 (.075) MIN Ø2,67 (.105) MAX Ø0.36/0.38 (.014/.015) 0,84 (.033) MIN 1,78 (.070) MAX 0,00 (.000) MIN 3,10 (.122) MIN RP 0,00 (.000) MIN SEE NOTE #2 0,84 (.033) MIN PLUG SSMC (SCREW-ON) 3,96 (.156) A/F HEX 6,40 UNF-2B THREAD CLOSED ENTRY CONTACT Ø2,57 (.101) MIN 0,00 (.000) MIN RP Ø1,35 (.053) MIN 0,00 (.000) MIN 2,29 (.090) MAX 2,29 (.090) MAX 5,08 (.200) MAX Ø1,37 (.054) MIN Ø2,54 (.100) MAX Ø 0,36/0,38 (.014/.015) 0,00 (.000) MIN 2,29 (.090) MIN RP 2,29 (.090) MIN NOTES 1) Inside diameter of female contact to meet VSWR, mating characteristics and connector durability, when mated with a 0,36 - 0,38 (.014 - .015) diameter male contact. www.ittcannon.com I-27 JACK 4,32 (.170) MIN 3,00 (.118) 0,84 (.033) MAX PLUG Dimensions shown in inches (mm) Specifications and dimensions subject to change 1,91 (.075) MIN 0,84 (.033) MAX RP 6,40 UNF-2A THREAD JACK 2) Must meet the force to engage and disengage when mated with its mating part. ca_I1-I40.qxd:Layout 1 2/10/11 8:44 AM Page 28 SSMB / SSMC Specifications Impedance Frequency Range Voltage Rating Insulation Resistance Contact resistance ELECTRICAL 50Ω SSMB = 0 to 4.0 GHz. SSMC = 0 to 12.4 GHz At Sea Level = 250 Vrms. at 21km (70k feet) = 60 Vrms 1000 MΩ minimum Center Contact = 4.0 m Ω maximum initial. 6.0 m Ω maximum after environment Outer Contact = 1.0 m Ω maximum initial. 1.5 m Ω maximum after environment Braid to Body = 1.0 m Ω maximum Contact Current Rating Insertion Loss RF Leakage 1.0 A dc maximum 0.30 dB maximum @ 1.5 GHz SSMB = -40 dB minimum @ 2 - 3 GHz SSMC = -50 dB minimum @ 2 - 3 GHz RF I Voltage Standing Wave Ratio (VSWR) To 12.4 GHz or 80% of upper cut-off frequency of the cable, whichever is lower. Applicable to 50Ω cables only.(F = GHz) Engagement Forces MECHANICAL Connector Configuration SSMB SSMC Cable group Straight Right Angle Straight Right Angle 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 SSMB: Initial = 26.7 N (6 lbs.) max. engagement and 8.9 N(2 lbs.) minimum disengagement. 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 Locknut Torque Coupling Nut Retention Materials SSMB: N/A SSMC: 0.2 Nm to 0.23 Nm (28 - 32 in.oz) 0.28 Nm to 0.35 Nm (40 - 50 in. oz) SSMB: N/A SSMC: 111 N (25 lbs. ) minimum 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 Corrosion (salt spray) Vibration, High Frequency Shock -65° C to 165° C MIL-STD-202, Method 101, test condition B, 5% salt solution MIL-STD-202, Method 204, SSMB: test condition B (15 G's). SSMC: test condition D (20 G's) 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 85º C. High temperature shall be 200ºC for connectors using 200ºC cables. GENERAL Connector Durability Contact Captivation Cable Retention 500 matings minimum 8,9 N (2 lbs.) minimum axial force. 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 inches (mm) Specifications and dimensions subject to change I-28 www.ittcannon.com ca_I1-I40.qxd:Layout 1 2/10/11 8:44 AM Page 29 SSMB PLUGS, JACKS AND RECEPTACLES Straight Plug A MAX Part Number Cable Numbers A 051 - 424 - 3188220 RG174/U, 316/U 20,01 (.790) A51 - 424 - 3196220 RG178/U, 196/U 19,33 (.761) 12,19 (.480) MAX Cable Numbers A51 - 428 - 3188220 RG174/U, 316/U 9,55 (.376) A51 - 428 - 3196220 RG178/U, 196/U 9,55 (.376) A51 - 428 - 3875220 RP A RD316 10,16 (.400) Cable Numbers A A MAX 3,96 (.156) Bulkhead Jack Part Number 051 - 427 - 3188220 RG174/U, 316/U 9,93 (.391) A51 - 427 - 3196220 RG178/U, 196/U 10,41 (.410) A MAX 9,12 (.359) 4,75 (.187) A/F HEX Bulkhead Receptacle - Rear Mount Mounting Nut Outside Panel 3,99 (.157) Part Number Ø0.91 (.036) 9,20 (.382) MAX 051 - 443 - 0000220 2,03 (.080) 4,75 (.187) A/F HEX 3,96 (.156) A/F HEX Dimensions shown in inches (mm) Specifications and dimensions subject to change www.ittcannon.com I-29 RF Part Number I 7,62 (.300) MAX Right Angle Plug ca_I1-I40.qxd:Layout 1 2/10/11 8:44 AM Page 30 SSMB BULKHEAD AND PRINTED CIRCUIT RECEPTACLES Bulkhead Receptacle - Front Mount Mount Nut Inside Panel 6,69 (.263) Part Number 6,76 (.266) MAX Ø0,91 (.036) 051 - 445 - 0000220 2,03 (.080) 3,96 (.158) A/F HEX 4,75 (.187) A/F HEX RF I Printed Circuit Receptacle - Straight Jack 6,71 (.264) 3,94 (.155) Part Number A51 - 451 - 0000220 0,51 (.020) 4 POSNS 3,96 (.156) 0,51 (.020) Printed Circuit Receptacle - Straight Plug 12,45 (.490) 0,51 (.020) 4 POSNS Part Number 051 - 452 - 0000220 3,94 (.155) Ø4,75 (.187) 9,75 (.384) 7,77 (.306) Printed Circuit Receptacle - Right Angle Jack Part Number 6,05 (.238) 3,81 (.150) A51 - 453 - 0000220 0,51 (.020) 3,94 (.155) 3,96 (.156) 0,51 (.020) 4 POSNS Dimensions shown in inches (mm) Specifications and dimensions subject to change I-30 www.ittcannon.com