Tanner r A] 1/4" LONG FRAME TELEPHONE JACKS JACK MATERIALS The complete Switchcraft line of standard size panels, jacks, plugs, switches and accessories are rugged, premium quality devices...hand-crafted by experts...100% inspected... and carefully adjusted to meet the traditionally high quality demands of the telephone industry and the military. Tightly controlled incoming inspection, manufacturing methods, and QC procedures assure you of long-life, reliable components. Typical applications where Switchcraft components have been specified for more than five decades are: telephone central office equipment, switchboards, jackfields, test and patch panels, and station equipment; TV and radio broadcasting consoles; PA and communication consoles; telegraph systems and apparatus; multichannel video and audio patching; and data processing equipment, such as computers, telemetry, I/O devices and facsimile. FRAMES Jack frames are heavy steel, formed and press welded for added strength. Side member adds to frame rigidity and resistance to shock and vibration. Both A and C type frames can be supplied. (See next page.) SPRINGS - A special copper alloy is used for leaf springs because it offers excellent mechanical and electrical characteristics, and good corrosion resistance. The spring alloy has special hardness and ductility, and springs are produced from custom-designed dies. Although normally adjusted to mate with telephone (and MIL-type) plugs, springs can be adjusted to mate with commercial phone plugs. BUSHINGS - Bushings are copper alloy (except insulated jacks), drilled to accept either a standard (.250" diameter finger) plug or a popular smaller (.206" diameter finger) plug. Series M Hi-D Jax have a threaded brass bushing, or a molded thermoplastic bushing for insulated mounting. CONTACTS - Jack design includes wiping action of contacts for low resistance connections. The contacts supplied depend on the jack selected. Gold or silver plating is normally offered as an option on tip, ring and/or sleeve springs. Several precious metals and shapes are used on jacks. Material Shape Description Palladium Welded Best overall combination of life, Crossbar current carrying, and resistance to environment. Also known as WEco #2. Fine silver Riveted, Carries higher current than button-type palladium. Gold alloy Welded Recommended for dry circuit Crossbar switching. Excellent resistance to corrosion and contamination. Also known as WEco #1. Fine silver Riveted, Heavy currents, (Large) button-type Gold or Plating For lower contact resistance Silver (used on through circuit springs). SOLDER LUGS TERMINALS - Lugs project out directly from rear of jack and are solder-coated for easy wiring and soldering. Offset lugs can be supplied on special order (except standard on MT-Jax). Jacks with offset ground lugs are particularly suitable for bussing connections on jack panels. Contact Switchcraft for special order lug requirements. STRAIGHT SOLDER LUGS OFFSET SOLDER LUGS WIRE-WRAPPING TERMINALS -- _ Wire-wrapping eliminates the need for soldering. Each terminal accepts up to three wrapped wires (22 or 24 gauge, 5 wraps each), applied with standard wire-wrapping tools. Terminal base has standoff shoulder which prevents first wrapped wire from accidentally sliding down and shorting against another terminal or adjacent spring. Terminal tips are radiused to facilitate positioning of wire-wrapping tool over terminals. See page 80 for wire-wrapping data. WIRE-WRAPPING TERMINALS PRINTED CIRCUIT TERMINALS - Components can be supplied with printed circuit terminals on special order. Terminals can be specified in various lengths to accommodate different thicknesses of single and double sided boards, as well as multilayers, and flat flexible cable and circuitry. PRINTED CIRCUIT TERMINALS (SPECIAL) OTHER TERMINALS Many other special terminal styles are possible. For example, where mounting permits, jacks can be supplied with stacks having right-angle terminals. Contact Switchcraft for special terminals. CUSTOM COMPONENTS Only the most popular types of jacks are listed. DIMENSIONS ARE FOR REFERENCE ONLY 2 8 LONG FRAME TELEPHONE JACKS LONG FRAME TELEPHONE JACKS MT-Jax (A Frame) y XMT-Jax, Number MT-Jax XMT-332A (C Frame) WMT-Jax, Number WMT-332B YMT-Jax, Number YMT-332B Details of Typical Buss Wiring of Jacks with Offset Ground Lugs Ground Lug Toward Frame (Y Offset) Buss Wire Between es Rows - Buss Wire Outside of Ground Lug Ground Lug Away Rows Toward Frame from Frame (X Offset) Long frame jacks are designed especially for high quality == communication equipment, and to meet exacting MIL specifications, as well as telephone and communication systems. Many jacks have WEco equivalent types. MT-Jax phone jacks are offered in four styles: MT-Jax, WMT-Jax, XMT-Jax and YMT-Jax. Rugged steel frames are produced in specially designed dies, press welded to provide rigidity and dimensional stability required by telephone and communication jack panels - and to meet MIL frame strength tests. A and C frame styles are available. TERMINALS Solder Lug: All MT-Jax have solder lug termi- nals. Wire-Wrapping Terminals: WMT-Jax have wire-wrapping ter- minals. Offset Ground Lugs: XMT-Jax and YMT-Jax have ground lugs, which simplify production line wiring time. A single row of jacks can be installed with a single buss wire connected to all ground lugs in a row, or when double rows are mounted on .625" vertical centers with lugs oriented between rows, holes in ground lugs line up so a single buss wire provides connections for both rows. XMT-Jax have ground lugs oriented away and YMT-Jax are oriented toward jack frame. See illustration. MIL STANDARDIZATION - MIL jack types listed have been adjusted for use with plugs specified in Amendment No. 1, MIL-P-642, usually M642/1-1, M642/1-2, M642/2-1, M642/2-2, M642/4-1 or M642/4-2. When applicable, specify the plug you will use; we will adjust with that plug where the item is not a MiL-type. NOTE: MT-Jax jacks Numbers $MT-342B and 0MT-344B have shorter bushings, 0.5" long with a hold inside diameter of .21". They will mate with MIL plug M642/5-1 or M642/8-1. M642/5-1 plug (Switchcraft 480) cannot be used with OMT-342B or 0MT-344B if these jacks are mounted on standard .625" thick panels. The short jack bushings are recessed .125", and the M642/5-1 is too wide to fit in the panel recess. Use plug M642/8-1 (Switchcraft 484) with a narrower diameter to fit in the recess and mate properly. CONTACTS Contacts on shuts and isolated switching circuits are welded crossbar palladium. Welded crossbar gold alloy contacts (WEco #1) are available on special order for dry circuit applications. SPECIFICATIONS Frame and Stack Screws: Plated steel, with iridescent iridite finish. Springs: Copper alloy, spring tempered. Solder lugs are tinned.. Bushings: Plated copper alloy standard. Natural brass finish optional. Insulation: Rigid plastic spacers (MIL-type PBE-P per Specification LP-513). One piece molded through stack. Contacts: Welded crossbar palladium contacts in shunt and isolated switching circuits are standard. Gold alloy (WEco #1) and fine silver are available on special order. MECHANICAL Life: Commercial jacks: 10,000 insertion/withdrawal cycles, minimum. Military Jacks: 20,000 insertion/withdrawal cycles, minimum. Mechanical Shock: Military Jacks Per MIL-STD-202, method 213, Test Condition H (75g). Vibration: Miltary Jacks Per MIL-STD-202, method 213, (10-55 Hz). ELECTRICAL Contact Resistance: Commercial Jacks .030 ohms maximum (initial), .050 ohms maximum (after humidity, durability exposure). Military Jacks .010 ohms maximum (initial), .020 ohms maximum (after life), .10 ohms maximum (after salt spray). Insulation Resistance: Commercial Jacks 10,000 MQ minimum (initial), 1,000 MQ minimum (after humidity). Military Jacks 10,000 MQ minimum (initial), 1,000 MQ minimum (after humidity, durability exposure). Dielectric Withstanding Voltage: 500 V, 60 Hz (rms) AC. ENVIRONMENTAL Thermal Range: Commercial Jacks -55C to +85C (non-operating); -20C to +65C (operating). Military Jacks - -55C to +85C (non operating); -40C to +65C (operating). Thermal Shock: Commercial Jacks Per MIL-STD-202, method 107. Military Jacks Per MIL-STD-202, method 107. Humidity: Commercial Jacks - Per MIL-STD-202, method 106. Military Jacks 0% to 95% operating and non-operating. Salt Spray: Commercial Jacks Per MIL-STD-202, method 101. Military Jacks Per MIL-STD-202, method 101 (48 hours). Moisture Resistance: Military Jacks Per MIL-STD-202, method 106 (240 hours). ORDERING Order jacks by part number. Additional variations in jacks are available on special order. Special circuitry, frames, contacts, natural brass bushings, as other terminals are available. Inch DIMENSIONS ARE FOR REFERENCE ONLY - (mm) Registered trademark of Swite! heraft, representa J price on fer WITS CronLONG FRAME TELEPHONE JABKS 1/4" LONG FRAME TELEPHONE JACKS CAL MT-JAX* (with WEco Equivalent Jacks)? Sche- Dim. X Sche- Dim, X Switchcraft | WEco MIL matic | maximum | Mating Switchcraft WEco MIL matic | maximum Mating Part Number | Equiv. Typet Circuit* | Inch (mm) Plug3 Part Number | Equiv. Type | Circuit*} Inch (mm) Plug* 2-CONDUCTOR 2 3-CONDUCTOR MT331 233A, MT332B 238A M641/3-1 | IV .562 (14.3) 221E3 M641/2-8 I 436 (11.1) 9CMT332B 238C - IV 962 (14.3) OCMT331__| 2290 z l 498 (11.1) WMT3328 | 238AM = iV -562(14.3) OWMT331 223AM - | 438 (11.1) OWCMT332B 238CM - IV 562 (14.3) OWCMT331 | 223CM = 438 (11.1) MT333B 300A = vil__| 562 (14.3) OMT332 232A, OMT334B 239A M641/3-2 Xi 562 (14.3) 544A4 - ll 4 (12.7) OCMT334-B 239C - Xil 562 (14.3) OCMT332__| 2320 : i 5 (12.7) WMT334B | _:239AM - Xl 578 (14.7) MT332A | 218A =| M641/2-3 | Il 5 (12.7) OWCMT334B | 239CM ~ Xil 578 (14.7) OCMT332A | 218C - Ill 5 (12,7) OMT336 241A M641/3-4 | XX 562 (14.3) OMT332C 303A M641/2-1 | XVIII 562 (14.3) OCMT336 241C ~ XX 562 (14.3) MT333 215A M641/2-6 | V .469 (11.9) OWMT336" 241AM - XX .625 (15.9) OCMT333 215C = V 469 (11.9) OWCMT336 241CM = XX .625 (15.9) Med2/2-4 OMT333E 237A - IX .625 (15.9) OMT336A" 242A M641/5-5 | XIV .688 (17.5) OCMT333A_[ 237C - xX (625 (15.9) | M642/4-1 OCMT336A | 242C = | XV 088175) =) asco MT334A | 225A, Me42/4-2 OWMT336A | 242AM - XIV_| .75 (19.0) 234A _ Xl 562 (14.3) af OWCMT336A | 2420M - XIV | .75 (19.0) OCMT334A_ | 2250, MOAGIA-S OMT336B" | 285A | M641/3-6 | xxl | 812 (206) 2340 * xl 562 (14.3) OCMT336B | 285C = XX! | 812 (20.6) MT334C 216A M641/2-5 | XVII .625 (15.9) MT336C" 240A M641/3-3 | XXII .688 (17.5) OCMT334C 216C, OCMT336C 240C = Xxil .688 (17.5) 48405 - XVIl .625 (15.9) OWMT336C" | 240AM ~ XXiIl .75 (19.0) MT334E 217A M641/2-7 | XXV 562 (14.3) OWCMT336C 240CM - XXil .75 (19.0) OCMTS34E | 217C XXV__| 562 (14.3) OMT336D" | 280A _ XX _| 75 (19.0) OMT334F 226A M641/2-4 | XIX 562 (14.3) OCMT336D 2680C - XXX|_ | .75 (19.0) OCMTa34F | 226C - XIX 562 (14.3) OWMT336D" | 280AM - XXXI_ | 938 (23.8) OMT335 236A - Xill 562 (14.3) OWCMT336D | 280CM - XXXI | .938 (23.8) OCMT335 | 236C : XI 562 (14.3) OMT338 267A = XXXII | .562 (14.3) OMT336E 438A - XXIll .75 (19.0) OCMT338 2676 - XXXIl_| .562 (14.3) CMT336E 438C M641/1-2 | XXII .75 (19.0) OMT339" 2B4A6 | M641/3-7 | XXVIl | .967 (24.6) OMT337 411A M641/2-9 | XXIV .75 (19.0) OCMT339 384C6 ~ XXVIl_ | .967 (24.6) OCMT337 411C M641/1-1 XXIV .75 (19.0) OMT342B 246A = IV 563 (14,3) M642/5-1 OCMT351C | 394C - XXXIIl_ | .812 (20.6) OMT352A__| 218) = ll 5 (12.7) ee lhe MT-JAX (WITH WECO EQUIVALENT JACKS)? Refer to page 79 and 80 for schematics. Sche- Dim."x 4 Special order only; contact Switchcraft. z ; ; ian : Switchcraft WEco MIL matic | maximum Mating x coree mbeeaee leg fs ont ere gemma pecdecee Seat en Part Number | Equiv. | Type | Circult*| Inch(mm) | Plug? numbers have been assigned. 3-CONDUCTOR 2 2 hava pl coarekonmasree coors Neco ogiaentecs = Mae [Rem Iam has nickel-plated copper alloy bushing). MT344B 248A = XII .625 (15.9) 3. Mating plugs and patch cords are contained in the catalog. | OMT346 249A = XX 562 (14.3) | M642/5-1 4. Adjust non-short tip-ring. OCMT346 249C - XX 562 (14.3) 5. Adjusted for plug M642/1-1 or M642/1-2. OMT354B 248E - Xil 625 (15.9) 6. Actuates differently (insulated A off ring instead of tip). OMT355" 243C = XXXV__|_.812 (20.6)10 7. Same as MIL type M641/2-3 except with offset ground lug. OMTa56C" | 245A - | XXXVI_| 938 (23.8)10| M6425-1 8. Same as MIL type M641/3-1 except with offset ground lug. OCMT356C 245C - XXXVI_| .938 (23.8) Me 9. Same as MIL type M641/3-2 except with offset ground lug. OMT357" 363A = __| XXxvil | .75 (19.010 | M642/2-2 tone et eet gee ete ee a Conte jacks wih C" heme P . OCMT359 326C = __| XxXIX_T 75 (19.0) h DIMENSIONS ARE FOR REFERENCE ONLY IC (mm)INA MT-JAX MT-JAX (Industry Standard No WEco Equivalent) (Industry Standard No WEco Equivalent) Dim. Xx Dim. x Switchcraft MIL Schematic maximum Mating Switchcraft MIL Schematic maximum Mating Part Number Type Circuit* Inch (mm) Plug? Part Number Type Circuit* Inch (mm) Plug* 2-CONDUCTOR? 3-CONDUCTOR + OWMT3324 = iil 5 (12,7) XMT332B = Vv 562 (14.3 _ OWCMT332A = {tl 5 (12.7) OYMT332B - WV 562 (14.3) XMT332A - ill 5 (12.7) 0CMT333B 2 Vil 562 (14.3 OVYMT332A - ul 5 (12.7) OWMT333B = Vil 562 (14.3) M642/2-1 = OCMT332C ba XVII 562 (14.3) XMT334B - xil 562 (14.3) or an OWMT332C - XVIII 5 (12.7) OYMT334B - XII 562 (14.3) M642/2-2 oi OWMT333 - Vv 469 (11.9) OWMT336B me ed 812 (20.6) sates OWCMT333 = V 469 (11.9) OWCMT336B = Xx! 812 (20.6) is gl OMT333A - Vi .967 (24.6) oMT343B - Vil 5 (12,7) = 6| OWMT333E - IX 625 (15.9) 0CMT342B - IV 562 (14.3) OWMT334A ss XI 562 (14,3) | M642/4-1 0CMT344B = xii 625 (15.9) ssf owmTs34c = XVII 562 (14.3) | Mede/-2 OWMT344B - Xil "625 (15.9) | M642/5-1 OWMT334E = XXV 662 (14.3) ot OMT346A" XIV 688 (17.5) OWMT334F xix 641 (16,3) | M#2/4-3 OMT346B - xxi B12 (206 QOWMT335" - xill .686 (17.5) OMT346C" = XXil .688 (17.5) M642/5-1 OWCMT335 - XIill .686 (17.5) OCMT346C = XXil "688 (17.5) | medz/2-2" MT335A M641/2-2 XXVI .75 (19.0) OCMT335A = XXVI 75 (19.0) "Refer fo pages 79 and 80. m4 OWMT335A 3 XxVI 75 (19.0) i 8 wa only; a, Switchcratt. an OWCMT335A Ld XXVI -75 (19.0) : eyes Benes ee sonra ha MIL tia OWMT336E" = XXIII .875 (22.2) because no MIL type numbers have been assigned. OWCMT336E - XXIII .875 (22.2) 2. MT-Jax have nickel plated copper alloy bushing. WEco equiv. jacks OCMT341 cS i 438 (11.1) have plain copper alloy bushings _ WEco No. 221E, which has nickel plated copper alloy bushing). ; 3. Mating plugs and patch cords are contained in this catalog. J 7. Same as MIL type M641/2-3 except with offset ground lug. pes) 8. Same as MIL type M641/3-1 except with offset ground lug. 9. Same as MIL type M641/3-2 except with offset ground lug. 10. When mounted on A frames, stacks are too high to fit in standard eae panes with .625" horizontal space add prefix C" to part number a to order jacks with C frame. ae "y" TYPE GROUND LUG ; (TOWARD" FRAME) : 546 ee fie : LUG Sree rte x uaF PRE MT-Jax, Offset Lugs MT-Jax and WMT-Jax fat MT-Jax,Wire-Wrapping Detall Inch (rm) DIMENSIONS ARE FOR REFERENCE ONLY Registered trademark SWC OC ret Hrciye TO! of Switchcraft, Inc. price ana ry Represt