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)a nd 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. 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. 2) must meet the force to engage and disengage when mated with its mating part. 0,84 (.033) min 0,00 (.000) min rp plug jack 1,78 (.070) max 0,84 (.033) min see note # 2 ?1,35 (.053) max ?4,83 (.190) max ?1,37 (.054) min ?2,67 (.105) max ?0.36/0.38 (.014/.015) 0,00 (.000) min 0,84 (.033) max rp 1,91 (.075) min 1,91 (.075) min closed ent ry con tac t 3,10 (.122) 3,10 (.122) min 0,00 (.000) min 6,40 unf-2b thread 3,96 (.156) a/f hex 2,29 (.090) max 2,29 (.090) min 2,29 (.090) min 6,40 unf-2a thread 2,29 (.090) max 5,08 (.200) max ?1,35 (.053) min ?2,57 (.101) min ?1,37 (.054) min ?2,54 (.100) max ? 0,36/0,38 (.014/.015) 4,32 (.170) min 3,00 (. 1 18) 0,84 (.033) max 0,00 (.000) min 0,00 (.000) min jack plug rp rp closed e ntry con tact ssmb (snap-on) ssmc (screw-on) m m a a t t i i n n g g i i n n t t e e r r f f a a c c e e cannon 50 ohm connectors ssmb / ssmc 27 www.ittcannon.com dimensions shown in mm (inch) specifications and dimensions subject to change key features ? small size ? low mass ? close packing density ? used in airborne applications
electrical i mpedance frequency range voltage rating insulation resistance contact resistance contact current rating 50 ssmb = 0 to 4.0 ghz. ssmc = 0 to 12.4 ghz at sea level = 250 vrms. at 21km (70k feet) = 60 vrms 1000 m minimum center contact = 4.0 m maximum initial. 6.0 m maximum after environment o uter contact = 1.0 m maximum initial. 1.5 m maximum after environment braid to body = 1.0 m maximum 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 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. 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 f emale contacts: beryllium copper. insulators: ptfe. lockwashers: phosphor bronze. crimp f errule: annealed copper alloy . center contacts: gold plated. other metal parts: gold or nickel plated to meet the finish and corrosion requirements of mil-c-39012 -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. mil -std -202, method 107, test condition b, except high temperature shall be 85oc. high temperature shall be 200o for connectors using 200?ocables. 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 insertion loss rf leakage voltage standing wave ratio (vswr) to 12.4 ghz or 80% of upper cut-off frequency of the cable, whichever is lower. applicable to 50 cables only.(f = ghz) engagement forces mating torque locknut torque coupling nut retention materials finish/plating temperature rating corrosion (salt spray) vibration, high f requency shock thermal shock connector durability contact captivation cable retention mechanical environmental general s s p p e e c c i i f f i i c c a a t t i i o o n n s s cannon 50 ohm connectors ssmb / ssmc www .ittcannon.com dimensions shown in mm (inch) specifications and dimensions subject to change 28
mounting plan u (p age 40) mounting plan u (page 40) assembly instructions ai-128 (page 44) assembly instructions 051 - 424 - 3188220 ai 663 (page 44) a51 - 424 - 3196220 ai 128 (page 44) assembly instructions a51 - 428 - 3188220 ai 129 (page 45) a51 - 428 - 3196220 ai 696 (p age 45) a51 - 428 - 3875220 ai 696 (p age 45) straight plug part number 051 - 424 - 3188220 a51 - 424 - 3196220 cable numbers rg174/u, 316/u rg178/u, 196/u a 20,01 (.790) 19,33 (.761) a max right angle plug part number a51 - 428 - 3188220 a51 - 428 - 3196220 a51 - 428 - 3875220 cable numbers rg174/u, 316/u rg178/u, 196/u rd316 a 9,55 (.376) 9,55 (.376) 10,16 (.400) 1 2,19 (.480) max 7,62 (.300) max rp 3,96 (.156) a max bulkhead jack p art number 051 - 427 - 3188220 a51 - 427 - 3196220 cable numbers rg174/u, 316/u rg178/u, 196/u a 9,93 (.391) 10,41 (.410) a max 9,12 (.359) 4,75 (.187) a/f hex bulkhead receptacle - rear mount mounting nut outside panel part number 051 - 443 - 0000220 9,20 (.382) max 3,99 (.157) ?0.91 (.036) 2,03 (.080) 4,75 (.187) a/f hex 3,96 (.156) a/f hex p p l l u u g g s s , , j j a a c c k k s s a a n n d d r r e e c c e e p p t t a a c c l l e e s s cannon 50 ohm connectors ssmb 29 www.ittcannon.com dimensions shown in mm (inch) specifications and dimensions subject to change
cannon 50 ohm connectors ssmb b b u u l l k k h h e e a a d d a a n n d d p p r r i i n n t t e e d d c c i i r r c c u u i i t t r r e e c c e e p p t t a a c c l l e e s s mounting plan u (page 40) mounting plan c (page 40) mounting plan c (page 40) mounting plan c (page 40) bulkhead receptacle - front mount mount nut inside panel part number 051 - 445 - 0000220 6,69 (.263) 6,76 (.266) max ?0,91 (.036) 2,03 (.080) 4,75 ( .187) a/f hex 3,96 ( .158) a/f hex printed circuit receptacle - straight jack part number a51 - 451 - 0000220 3,94 (.155) 6,71 (.264) 0,51 (.020) 4 posns 0,51 (.020) 3,96 (.156) printed circuit receptacle - straight plug part number 051 - 452 - 0000220 12,45 (.490) 0,51 (.020) 4 posns 3,94 (.155) ?4,75 (.187) printed circuit receptacle - right angle jack p art number a51 - 453 - 0000220 9,75 (.384) 7,77 (.306) 6,05 (.238) 3,81 (.150) 3,94 (.155) 0,51 (.020) 4 posns 0,51 (.020) 3,96 (.156) 30 www .ittcannon.com dimensions shown in mm (inch) specifications and dimensions subject to change
p p l l u u g g s s a a n n d d r r e e c c e e p p t t a a c c l l e e s s mounting plan u (p age 40) mounting plan u (page 40) assembly instructions 050 - 424 - 3188220 ai 663 (page 44) 050 - 424 - 3196220 ai 128 (page 44) assembly instructions 050 - 428 - 3188220 ai 286 (page 45) 050 - 428 - 3196220 ai 696 (p age 45) straight plug part number 050 - 424 - 3188220 050 - 424 - 3196220 cable numbers rg174/u, 316/u rg178/u, 196/u 20,07 max (.790) bulkhead receptacle - rear mount mounting nut outside panel part number 050 - 443 - 0000220 9,20 (.362) max 3,99 (.157) ?0,91 (.036) 2,03 (.080) 4,75 (.187) a/f hex bulkhead receptacle - front mount mounting nut inside panel part number 050 - 445 - 0000220 6,69 (.263) 6,76 (.266) max ?0,91 (.036) 2,03 (.080) 4,75 (.187) a/f hex right angle plug part number 050 - 428 - 3188220 050 - 428 - 3196220 cable numbers rg174/u, 316/u rg178/u, 196/u a 10,16 (.400) 9,40 (.370) 12,19 (.480) ref 4,32 (.170) max rp 3,96 (.156) a max cannon 50 ohm connectors ssmc 31 www.ittcannon.com dimensions shown in mm (inch) specifications and dimensions subject to change
cannon 50 ohm connectors ssmc p p r r i i n n t t e e d d c c i i r r c c u u i i t t r r e e c c e e p p t t a a c c l l e e s s printed circuit receptacle - straight jack part number 050 - 451 - 0000220 3,94 (.155) 6 ,71 (.264) 0,51 (.020) 4 posns 3,96 (.156) printed circuit receptacle, right angle jack part number 050 - 453 - 0000220 10,54 (.415) 7,77 (.306) 5,97 max (.235) 3,94 (.155) ?4,75 (.187) 0,51 (.020) 4 posns mounting plan c (page 40) mounting plan c (page 40) 32 www .ittcannon.com dimensions shown in mm (inch) specifications and dimensions subject to change
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