Microminiature Connectors Hermetic-MDMH MDMH connectors are ideal for applications requiring a better seal than can be achieved with epoxy resins. The connector utilizes size 24 AWG contacts that are compression glass sealed through a steel shell and into a diallyl pthalate front end insulator. An interfacial seal provides environmental protection when mated. We recommend MDMH receptacles be soldered to the chassis or container for a completely leak-proof joint. MDMH receptacles mate with standard MDM plugs. Features • Hermetically sealed connector designed for those applications where a vacuum, inert gas or a constant controlled pressure are required to eliminate adverse effects created by atmospheric changes. • Steel shells to provide greater strength, prevent chipping, cracking or breaking, offer electro-magnetic (EMI) and RFI shielding. • Silicone elastomer compression interfacial seal to provide a moisture and humidity seal between each contact and between contacts and shell. Specifications Standard materials & finishes Shell Insulator Contacts Hermetic seal Leak rate ELECTRICAL DATA No. of contacts Dielectric withstanding voltage Insulation resistance Wire size Contact termination MECHANICAL FEATURES Size or length Service class Coupling Polarization Contact spacing Shell style Mild steel, tin-lead plated Glass filled diallyl phthalate per MIL-M-14. Type SDGF Copper alloy, gold plated sockets on mild steel gold plated pins. Solder pots - mild steel gold plated Compression glass 1 micron cubic ft/hr max (1.04 x 10-5 cc/sec at 1 ATM pressure differential) 9 to 100 150 VAC 5000 Mohm minimum #26 through #30 AWG Solder pot 8 sizes Hermetically sealed Friction/jacks Keystone shaped shells .050 (1,27) centers Receptacle, solder mount How to Order MDMH – 51 Hermetic Micro D Receptacle Series Contact layout 9, 15, 21, 25, 31, 37, 51, 100 Socket Contacts (only) Termination type Dimensions shown in inch (mm) Specifications and dimensions subject to change www.ittcannon.com 23 S S Microminiature Connectors Hermetic-MDMH Contact Arrangements Face vew of socket insert - use reverse order for wiring side. 5 4 9 3 8 2 7 1 8 6 7 6 5 4 3 15 14 13 12 11 10 9 Contacts 2 11 1 10 9 8 7 6 5 4 3 2 7 6 5 4 3 2 13 12 11 10 9 1 21 20 19 18 17 16 15 14 13 12 9 25 19 18 17 16 15 14 13 12 11 10 1 9 8 7 6 5 8 7 6 5 4 3 2 1 24 23 22 21 20 19 18 17 16 15 14 21 Contacts 15 Contacts 16 15 14 13 12 11 10 9 8 25 Contacts 4 3 2 18 17 16 15 14 13 12 11 10 1 9 8 7 6 5 4 3 2 1 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 37 Contacts 31 Contacts 1 2 3 4 5 6 7 8 51 Contacts 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 100 Contacts Contact identification numbers are for reference only and do not appear on insulator or connector body. Shell Dimensions 6,61 (.260) MAX A B F 4,58 (.180) MAX D 2 HOLES G E 2-56 UNC (9-51 WAY) 4-40 UNC (100 WAY) 5,06 (.199) MAX 1,93 (.076) MAX C Part Number by shell size A max B max C max D max E max F ±.005 (0,13) G max MDMH-9S .885 (22,48) .738 (18,74) .400 (10,16) .270 (6,86) .430 (10,92) .565 (14,35) .261 (6,63) MDMH-15S 1.035 (26,29) .888 (22,55) .550 (13,97) .270 (6,86) .430 (10,92) .715 (18,16) .261 (6,63) MDMH-21S 1.185 (30,10) 1.038 (26,36) .770 (17,78) .270 (6,86) .430 (10,92) .865 (21,97) .261 (6,63) MDMH-25S 1.285 (32,64) 1.137 (28,87) .800 (20,32) .270 (6,86) .430 (10,92) .965 (24,51) .261 (6,63) MDMH-31S 1.435 (36,45) 1.288 (32,72) .950 (24,13) .270 (6,86 .430 (10,92) 1.115 (28,32) .261 (6,63) MDMH-37S 1.585 (40,26) 1.438 (36,53) 1.100 (27,94) .270 (6,86) .430 (10,92) 1.265 (32,13) .261 (6,63) MDMH-51S 1.535 (38,99) 1.388 (35,26) 1.050 (26,67) .310 (8,00) .473 (12,01) 1.215 (30,86) .315 (8,00) MDMH-100S 2.275 (57,78) 2.078 (52,78) 1.455 (36,97) .365 (9,27) .522 (13,26) 1.800 (45,72) .410 (10,41) Dimensions shown in inch (mm) Specifications and dimensions subject to change www.ittcannon.com 24