MIL SPECS MILITARY SPECIFICATION cM oooo1es cooe3a1 & SEMICONDUCTOR DEVICES, THYRISTOR, REVERSE BLOCKING, SILICON, TYPES 2N1792 2N1793, 2N1795, 2N1797, 2N1798, 2N1799, 2N1800, 2N1805, 2N1806, 2N1910, 2N1911, 2N1913, 2N1915, 2N1916, 2N2031, JAN, JANTX, AND JANTXV This specification is approved for use by all Depart~ ments and Agencies 1. SCOPE of the Department of Defense. MIL-S-19500/204F Soret 4 MIL -S-19500/204E 19 August 1975 1.1 Scope. This specification covers the detail requirements for silicon thyristors. Three levels of product assurance are provided for each device type as specified in MIL-S-19500. 1.2 Physical dimensions. See figures 1 (TO-94) and 2 (10-83). 1.3 Maximum ratings. TT I T-V [V IT [P [P T Stud [Operating | T IT IR | p TAT) poTSHy GM GM GH GMP SCAY) torque Jaltitude (chee fark Peo | L = | | l | | | | | | temper- | ty i | | | | | | | | | | | ture) | | | | r | | Adc IA(pk)(11 v(pk) Ivipk) IA(pk) | Woo} M0 bein Jom 61 20) ECO CM I | Icycle) | | | i i | | | | | i | | | | | | | | | | | | | | 50 |1000 | 5 | 10 | 2 [| 5 | 05 |} 150 | 15 [-40 to |-40 to} 0.4 | es a ee 1/ This average on-state current is for a maximum allowable case temperture of 83C and 180 electrical For other operating conditions see figure 3. degrees of half sine wave conduction. 2/ Surge rating is nonrecurrent and applies only with device in the conducting state. 1.3.1 Individual ratings. ! TVp(rms) Vrrm 17 Tprm 17 TVpsm 27 | | Types | i | | | | | Vans | VUpk) | VUpk) | Vtpky i | | | i i | 2N2031 | 35 | 50 | 560 | 7 4} | 2N1792, 2N1910 | 35 | 50 | 50 | 75 | | 2N1793, 2N1911 | 70 | to {| it00 | 150 | | 2N1795, 2N1913 | 140 | 200 |} 200 | 300 | | 2N1797, 2N1915 | 210 | 300 | 300 | 400 4} | 2N1798, 2N1916 | 28 | 400 | 400 | 500 |} | 2N1799, 2N1805 | 350 {| 500 | 00 | 650 | | 2N1800, 2N1806 | 420 | 600 | 600 | 720 | / Values apply for zero or negative gate voltage (Vg). 2/ Transient inverse voltage, nonrecurrent, t = 5.0 ms max. TBenefictal conments (recommendations, additions, deletions) and any pertinent data which may be ofl Juse in improving this document should be addressed to: Naval Electronic Systems Command, ATTN: | [ELEX 8111, Washington, DC 20360 by using the self-addressed Standardization Document Improvement | [Proposal (DD Form 1426) appearing at the end of this document or by letter. | Page 1 of 12 FSC 5961MIL SPECS tcf Oo00125 dooa3a2 6 MIL -S-19500/204F 1.4 Primary electrical characteristics at Ta = 25C (unless otherwise specified). T Limits IWyMl7 [iq a7 Idv/dt I7 [Woy 17 ligt 27 Tot, S/ | | pe OE TD VST tte 1 Toor | | | | | | | | | 1 | | v(pk) mAdc ! V/us ! Vde ! mAdc | us ! } Min jf --- [| --- | 200 |0.252/ 1 5 | 77" | | Max ! 2.1 ! 40 | --- 3.0 ! 70 3/ | 40 / See conditions column for the applicable group A test. / This value also applies at Ta = +125C. ~40C. / This value also applies at T, 2. APPLICABLE DOCUMENTS 2.1 Government specifications and standards. Unless otherwise specified, the following specifications and standards, of the issue listed in that issue of the Department of Defense Index of Specifications and Standards specified in the solicitation, form a part of this specification to the extent specified herein. SPECIFICATION MILITARY MIL-S-19500 - Semiconductor Devices, General Specification for. STANDARD MILITARY MIL -STD-750 - Test Methods for Semiconductor Devices. (Copies of specifications, standards, drawings, and publications required by manufacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer. ) 2.2 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification shall take precedence. 3. REQUIREMENTS 3.1 Detail specification. The individual item requirements shall be in accordance with MIL-S-19500, and as specified herein. 3.2 Abbreviations, symbols, and definitions. The abbreviations, symbols, and definitions used herein shall be as specified in MIL-S-19500. 3.3 Design, construction, and physical dimensions. The design, construction, and physical dimensions shall be as specified in MIL-S-19500, and figures 1 and 2 herein. 3.4 Marking. Marking shall be in accordance with MIL-S-19500, except that the country of origin may be omitted at the option of the manufacturer. 4. QUALITY ASSURANCE PROVISIONS 4.1 Sampling and inspection. Sampling and inspection shall be in accordance with MIL-S-19500, and as specified herein. 4.2 Qualification inspection. Qualification inspection shall be in accordance with MIL-S-19500, and as specified herein. 4.3 Screening (JANTX, and JANTXV levels only). Screening shall be in accordance with MIL-S-19500 (table TI) and as specified herein. The following electrical measurements shall be made in accordance with table I herein. Devices that exceed the limits of table I herein shal? not be acceptable.i MIL SPECS 1c oo0001Le5 9002333 T ii / MIL-S-19500/204F lange. 7 100% of initial value lor 1 mA( pk), whichever is greater. lalppm1 = 100% of initial value lor 1 mA( pk), whichever is greater. TT T Measurements | [Screen (see table II [ | | of MIL-~S-19500) [SANT and JANTXY levels 1 i | | | | 3 ITLow = -40C; Thigh = *150C | | | i | 4 {2500 G (leads removed or secured) ! T ] I 9 {hot required ! T ] ] 10 (kot required |! ] ] i | il | TRRMA Ipgmi Yeti and Vry | | I I | |Test condition A (ac brocking voltage); | | 12 ITc = 125C; Vem = Ver | | I(see J. 23. 1),VpM = VoRM (see 1.3.1); | | IRex | | i | | ] i ! 13 | Subgroup 2 of table 1 herein, | i | | i | | | 4.4 Quality conformance inspection. Quality conformance inspection shall be in accordance with MIL-S-19500, and as specified herein. All testing shall be conducted on devices prior to attachment of external leads or terminals. After attachment of leads or terminals, the tests of subgroups 1 and 2 of table I shall be performed prior to shipment. 4.4.1 Group A inspection. Group A inspection shal] be conducted in accordance with MIL-S-19500, and table I herein. End point electrical measurements shall be in accordance with the applicable steps of table IV herein. 4.4.2 Group B inspection. Group B inspection shal] be conducted in accordance with the conditions specified for subgroup testing in table IVb of MIL-S-19500, and table II herein. Electrical measurements shall be in accordance with the applicable steps of table IV herein. Subgroups 3 and 6 of table II shall be performed on a sample from the sublot containing the highest voltage rated devices in the lot. 4.4.3 Group C inspection. Group C inspection shall be conducted in accordance with the conditions specified for subgroup testing in table V of MIL-S-19500, and tabie IJ] herein. Electrical measurements shal] be in accordance with the applicable steps of table IV herein. Subgroups 5 and 6 of table III shall be performed on a sample from the sublot containing the highest voltage rated devices in the lot to accept that type and ail lower voltage rated devices. In the event subsequent lots contain a higher vol tage type, that type shall be subjected to the tests of subgroups 5 and 6 prior to the acceptance of the lot.MIL SPECS 1f coo0125 oooe334 1 MIL-S-19500/204F 4.5 Methods of inspection. Methods of inspection shall be as specified in appropriate tables and as follows: 4.5.1 Intermittent life test. The thyristors shall be operated jn a single phase circuit as shown on figure 4 with 175 #5 degree conduction angle. Cell stud temperature shall be maintained at 80 #5C as measured with a thermocouple rigidly attached to a cell hex. Peak input voltage from a 60 Hz sinusoidal blocking voltage power supply shall be equal to rated blocking voltage. Average forward current shall be 50 amperes per cell from the 60 Hz sinusoidal forward current supply. The blocking voltage supply shall be phase delayed 90 electrical degrees with respect to the forward current supply in order to impose both forward and reverse blocking duty on the cells under test. The forward current supply consists of a low voltage transformer with a means of adjusting the secondary voltage. The blocking voltage supply consists of a high voltage transformer with a synchronous switch connected in series with one of the secondary transformer leads. The synchronous switch is set to conduct for 170 #5 electrical degrees conduction during the interval when terminal A is negative with respect to terminal C. A minimum of 2 and a maximum of 5 electrical degrees off time shall be allowed after forward current conduction before blocking voltage is applied by the synchronous switch. The gate firing pulses shall be delivered from a firing circuit with an open circuit voltage of 7.0 43.0 volts and a short circuit Current of 1.2 #0.8 amperes. The gate pulse average power input shall not exceed 0.5 watt. The gate firing supply shall be in phase with the cell forward current supply. 5. PACKAGING 5.1 Packaging requirements. The requirements for packaging shall be in accordance with MIL-S~19500. 6. NOTES 6.1 Notes. The notes specified in MIL-S-19500 are applicable to this specification. 6.2 Changes from previous issue. Asterisks are not used in this revision to identify changes with respect to the previous issue, due to the extensiveness of the changes. Custodians: Preparing activity: Army - ER Navy - EC Navy - EC Air Force - 17 (Project 5961-0810) Review activities: Army - AR, MI Air Force - 11, 19, 85, 99 DLA - ES NASA - NA User activities: Army ~- SM Navy - AS, CG, MC, OS, SH Agent: DLA ~ ES verMIL SPECS Icy 00001285 0002935 3 i MIL-S-19500/204F TABLE I. Group A inspection. I | MIL-STD-750 T LTPD i Limits | T | ] I | | Inspection [Method] Conditions | JANTX | Symbol | Min | Max | Unit | | | {| JANTXV | | | | | | | i | | | I | | ] l I Subgroup 1 ! ! 5 | \Visual and mechanical | 2071 | l | l i | | inspections | | | | | | I | | | i | | | | ! Subgroup 2 I 5- ! ! ! ! i [Reverse blocking | 4211 [AC method, bias condition D, | [IRRMI i --- | 5 [mA(pk) | current i If = 60 Hz, i | | | I ! | {Vee = Vprm (see 1.3.1) | | | | | [Forward blocking | 4206 [AC method, bias condition D, | iIprmi }--- | 5 |mA(pk) | current | [f = 60 Hz, | | | | | ! {YOM = VDRM (see 1.3.1) ! ! IGate-trigger voltage | 4221 |Vo = 6.0 Vdc, | Ver 10.25 [3.0 J|Vdc [ and gate-trigger | IR; = 10 ohms, | [ety | 5 i 70 |mAdc ! current | [Re = 25 ohms maximum ! ! | | | Forward "on" voltage | 4226 {Iqy = 220 A(pk) (pulse), | Vm J~-- [2.1 |V(pk) i | [Pulse width = 8.3 ms maximum, | | | I | ! ! |Duty cycle = 2% maximum ! ! ! [Holding current | 4201 [Vag = 22.5 Vdc, | ly | --- | 40 |mAdc | | [Igy = 5 Adc, | I | | | | | iIpo = 500 mAdc, i | | i [ | i Ibias condition D, i | | | | | | iGate-trigger source | | | | | [ | | voltage = 6 Vdc, | | { i | I | [Ro = 50 ohms { | | | | | | | I | | | | [Reverse gate current | 4219 Ve = -5.0 Vde ! M4 ! --- |-300 |mAdc | | | Subgroup 3 ! | 5 ! High-temperature | 4211 JAC method, Tc = 125C, | I Ippwe [ --- | 15 [mA(pk) | reverse blocking i Ibias condition D, f = 60 Hz, | i | | | ! current | IVaM = Verm (see 1.3.1) | | | | | | | |High-temperature for- | 4206 [AC method, Tc = 125C, | {I | --- | 15 = |mA(pk) | ward Blocking | Ibias condition D, l | DRM2 | | | P current ! Yom = Vprpm (see 1.3.1) | ! ! ! [Gate-trigger voltage | 4221 |Tp = 125C, | I Vere 10.25 | --- [Vdc | | Re = 25 ohms maximum, | | | | | | | IR, > 500 ohms, | | | | | ! ! W2 = VorM (see 1.3.1) ! ! ! [Low-temperature reverse! 4211 [AC method, Tc = -40C, | | Trpm3 {| --- | 5 |mA(pk) | blocking current | Ibias condition D, f = 60 Hz, | | | { | ! ! Ire = Var (see 1.3.1) ! ! ! [Low-temperature for- [ 4206 IAC method, Tc = -40C, | lIppm3 | --- [| 5 |mA(pk) | ward blocking | Ibias condition D, | | | J i | current ! Von = Vpopm (see 1.3.1) | | | | ILow-temperature gate- | 4221 |V2 = 6.0 Vdc, | iVGT3 10.25 | 3.0 [Vdc | trigger voltage and | iRL = 10 ohms, | | i | | | gate-trigger current | IRe = 25 ohms maximum, | [Igt2 [| --- | 130 [mAdc | | Feet pope yyMIL -S-19500/204F Ie pl 25 ohms maximum, IForward current pulse = 4A/ys I< di < 200A/us 7" dt 7 | I MIL SPECS cf cooo125 oooz33. 5 ff TABLE I. Group A inspection -Continued. 1 I MIL-SfTD-750 1 LIPD ] | Limits | I l ] ] ] J | | | [ Inspection [Method | Conditions | JANTX | Symbol | Min | Max [ Unit | | | | [ JANTXV| i | | | | | | | | | | | | I I | | | | | | T [ Subgroups 4 & 5 | [ i | i | I | | | i | | i i | i iNet applicable ! ! | | utes pepo bP | ISurge current | 4066 [I7sy = 1000 A(pk) (1/2 | | | | | | | | istne wave), 10 surges at | | | | | i | We Vin (e013 4), | | see . | | RM pRB | | i of | | ! ! strge! duration = 7 ms minimum ! ! | [Electrical measurements | {See table IV, | | | | | | | | Isteps 1, 2, 3, and 4 | | | | | | | | | | | | i | | | mae pe por tb | JExpotential rate of | 423I~iT = 125C, | IVp | i | | | voltage rise | Ibias condition D, | | | i | | | i IC = .05 uF, | | | | | i | | IR, = 100 ohms, | | i | | I | i Irpetition rate = 60 pps, | | | | | | i | |test duration = 15 s, | i | i | i | | Idv/dt = 200 V/us ! ! | | | ]2N1910, 2N1792, 2N2031 | iaa = 50 Vdc | | [45 | --- [de | [2N1911, 2N1793 | IVa = 100 Vde | | | 95 [ --- | Vde | ]2N1913, 2N1795 | IVan = 200 Vdc | I {190 J --- | Vde | [2N1915, 2N1797 | [Vay = 300 Vdc | | [280 |--- | Vdc | 12N1916, 2N1798 | Van = 400 Vdc | | [370 | --- | Vdc | |2N1805, 2N1799 | IVaq = 500 Vdc | | 1470 [--- | Vdc | J2N1805, 2N1800 ! IVAA = 600 Vdc ! jo70 ! o- Vdc ! [Circuit-commutated | 4224 IT. = 100C, | Itg | --- [40 [us | | turn-off time | [It = 50 A(pk), | | | | | | | | [ton = 100 #50 us, | | | | | | | lai/at = 25 A/us maximum, ! ! Vow = V maximum | | (See 1.58%) | | | | | | | | Irev. voltage @ | | | | I | i | It, = 15 V minimum, i | i | | | | | Irdpetition rate = 60 pps | i i | | | I | vent an (ate 20 V/us; | | | | | | | | [Vom = Vprm (see 1.3.1), | | | | | | | i I gate pink Mcondition, | | | | | | | l Igate source voltage = 0, | i | | | | I | |gate source resistance = | | | i | I ! ! ! 100 ohms maximum | [Gate-controlled turn- | 4223 IVa, = 6 Vdc, | [ton [ --- | 15 [ys | | on time (2N2031 | [Ity = 2A(pk), | | | | | | | only) | Veg = 6 Vdc, | | | | | | | | It,7 = 11 us maximum, | | | | | | I i I | | | i | i i | i | | | | | | | [ | | | | | i i i | | | | | | | | | | | | | i | | | | | |MIL-S-19500/204F Electrical measurements See table IV, steps 1, 2, 3, and 4 MIL SPECS ma | 0000125 O000c33? 7 i TABLE 11. Group B inspection. | | MIL-STD-750 | I | Inspection | | LTPD i | ! Method Conditions | ! T | I I I ! Subgroup 1 15 | | [Resistance to solvents i 1022 | | | | | | | | Subgroup 2 i i f 10 | | | | | | [Thermal shock (temperature cycling) } 1051 iTest condition Fy, except | | | pO ea a [Hermetic seal | 1071 | | i | Fine leak | | | | ! Gross Teak | ! [Electrical measurements ! \See table IV, steps 1, 2, 3, and 4! | ! Subgroup 3 ! 5 ! IBlocking life jas iTest conditions per MIL-STD-750, | | | | Imethod 1040, test condition A i | | | I(ac blocking voltage); i i | | Hoy = Vepq (see 1.302) | | Vom = Yarn (see 1.3.1), | I Vom = Vppm (see 1.3.1); | | | | IRox = @ | | i | | | | [Electrical measurement |See table IV, steps 1, 2, 3, and | | i i | | |! Subgroup 4 | ! | |Decap internal visual design verification | 2075 | 1 device | | | | 1/0 failure | | | i for each | | | | llot | | | | i | | Subgroup 5 | | ! 20 | I i | \ [Thermal resistance [ 4081 lI71 = 50 Adc, | | | | ITp = 125C maximum, | | | | lIt2 = lowest level which assures | | | | | complete turn on (approximately | | | i | 1 Adc), | | ! ! IRegc = 0.4 C/W maximum | | ! Subgroup 6 ! | 10 ! . | |High- temperature life (non operating) | 1032 ITa = 150C, t = 340 hours ! | | | | | | i | i | | | i | | | |MIL-S-19500/204F Constant acceleration MIL SPECS ra | goodies O002e3354 4 i TABLE III. Group C inspection. I MIC-STD-750 | | Inspection | i Method Conditions I T i | i Subgroup 1 [ [Physical dimensions 2066 Ise figures 1 and 2 | | Subgroup 2 | Thermal shock (glass strain) 1056 {Test condition B | |Terminal strength stud torque 2036 |Test condition D2 torque = | | | 150 1b-in, | | t = 15 seconds minimum ! | [Hermetic seal 1071 | | | Fine teak | | Gross leak [Moisture resistance 1021 {Omit initial conditioning | | | | [External visual 2071 |JElectrical measurements [See table IV, steps 1, 2, 3, and 4| | | | | Subgroup 3 | | | | | {Shock 2016 15 blows each Yq, Yo, 2], axes; | ! 100 G, 1.0 ms. | | lVibration, variable frequency 2056 {10 G, 100 to 1000 Hz, leads | |secured or removed | | | l | | 2006 12500 G, orientations X4, Yy, 21 | Electrical measurements See table IV, steps 1, 2, 3, and 4 | I | | | | Subgroup 4 i | | | | {Salt atmosphere (corrosion) 1041 |! | |! Subgroup 5 ! | | iBarometric pressure (reduced) 1001 115 mm Hg, Vpm = Vppm (see 1.3.1), | | [Voy = Vorm (see 1.3.1), l | it = 60 s | | | | ! Subgroup 6 | | [Intermittent operation life 1036 [ton = 50 minutes, | | [tof = 10 minutes, see paragraph | | [4.5.1 | | | | [Electrical measurements IS | | ee table IV, steps 1, 2, 3, and 4 iMIL-~S-19500/204F It. Pulse width = 8.3 ms maximum, Duty cycle = 2% maximum MIL SPECS IC@ 0000125 00023345 o i TABLE IV. Group A, B, and C. i I I MIL-STD-750 | Limits | I iStep| Inspection | Symbol | | Unit | | |Method Conditions [Min VNax | | [ i | ] | I | 1. [Reverse blocking current | 4211 [AC method, bias condition D, LIRRMI {--- | 5 [mA(pk}] | | i If = 60 Hz, | | | | | ! | RM = Vppm (see 1.3.1) | ! ! | 2. [Forward blocking current | 4206 |AC method, bias condition D, !Ippmi [--- | 5 {mA(pk)] | | | lf = 60 Hz, | | | | | | ! (Yow = Vorm (see 1.3.1) | | | | 3. IGate-trigger voltage and | 4221 |Vp = 6.0 Vdc, era 10.2513.0 [Vdc | | [ gate-trigger current =| IR, = 10 ohms, let, 15 [| 70 ImAdc | ! ! | IRe = 25 ohms maximum |! ! ! ! ! 4. |Forward on" voltage 4226 ! = 220 A(pk) (pulse), rm I--- (2.1 IVipk) ! | i | | | | | | | | | | | | | | | | | i | | | | | |MIL-S-19500/204F MIL SPECS ic o000125 d002e340 7? I CATHODE SEE NOTE 3 1.062 { .020 1,031 FT 4 AUXILARY CATHODE SEE NOTE 6 .300 MAX DIA INCHES MM 150 7 | GATE 020. 51 140 IL _ 0401.02 r .055 1, 40 1102.79 oe / Ho 8 MAX .150 3.81 ai i .170 4,32 1 { { _l .250 6.35 GH _ .300 = 7.62 425 =| ,310 7.87 250 | 325 3258.26 { MAX .350 8. 89 319 50 .425 10, 80 . 7.6 6435 11.05 RED oer 7.000 .50 12.70 | WHITE .650 16.51 6.512 r ' .797 20,24 6,075 roo! .827 21.01 : 1,000 25, 40 ke 1.000 1.031 26.19 MAX DIA 1,062 26.97 l 1,125 28.58 1.750 350 i 1.750 44,45 MAX 170 1.125 6,075 154,31 MAX 6.512 165,40 | 7,000 177.80 435 pia SEATING PLANE 7.650 194.31 .827 .425 .797 4 \_50-20UNF-2A NOTES: }. Complete threads to extend within 2.50 (63.50 mm) threads of seating plane. 2. Maximum pitch diameter of plated threads shall be basic pitch diameter .4675 (11.87 mm) Ref. (Screw Thread Standards for Federal Services) FED-STN-H28, Pl. . 3. Angular orientation of these terminals is undefined, Square or radiu ~ nd of terminal is optional. A chamber or undercut on one or both ends of hex portions is optional. Dimensions are in inches. This auxiliary cathode lead may be cut off if not required for shielding of stray signals which might trigger the thyristor. Metric equivalents are given for general information only and are based upon 1 inch = 25.4 mm, ~ nos FIGURE 1. Dimensions of controlled rectifier, types 2N1805, 2N1806, 2N1910, 2NI911, 2N1913, 2N1915, 2N1916, and 2N2031, TO-94 outline. 10MIL SPECS Ic OO001e5 0002341 4 J MIL-S-19500/204F oT; CATHODE pent B SEATING PLANE By fs TERM. @ NI in ANODE Low TERM. 3 CATHODE INCHES MILLIMETERS TERM. 2 OPTION SYMBOL] MIN MAX MIN MAX | NOTES B . 360 .480 | 9.14 | 12.19] 1 Bi . 059 6115 | 1.49 2.92) 1 Cc 115 .160 | 2.92 4.06] 1 Ci . 012 . 050 .30 127] 1 0D ~-- 1,227 | --- 31. 16 OD1 | --- 1.031 | --- 26.19] 2 E 1.031 | 1.062 | 26.19 | 26.97 F .170 .400 | 4.32 | 10.16} 3 J eee 1.610 | --- 45,97] 2 L --- .650 | --- 16,51} 2 Li . 180 oe 4.57 --- OM 425 .499 | 10.80 | 12.67] 4, 7 N 797 827 | 20.24 | 21.00 t Ni | --- 1125 | --- 3.18] 4 s ao .575 | --- 14.60} 2 41 _4 oT . 180 .260 | 4.57 6. 60 OT1 | .060 .080 | 1.52 2. 03 ow .4619 | 4675] 11.73 | 11.87] 5 Z . 180 > 4.57 --- 6 NOTES: Contour and orientation of fixed terminal lugs are undefined. The body and terminals of the device, with the exception of the extended lug length S and L, lies within the cylinder defined by OD1 and length J. 3. A chamfer (or undercut) on one or both ends of the hexagonal portions is optional. Length of incomplete or undercut threads. Pitch diameter of .50-20 UNF 2-A (coated) threads (USA Bl]. 1-1960). Minimum fiat. Complete threads to extend to within 2.50 threads of head. Angular orientation of terminals 1 and 2 is undefined. moa oo. ONAN FIGURE 2. Dimensions of thyristor types 2N1792, 2N1793, 2N1795, 2N1797, 2N1798, 2N1799, 2N1800, TO-83 outline. 7MIL SPECS Ich gooo1eS Oo0234e O a MIL-S-19500/204F TURE, _ 58 8 MAX. ALLOWABLE STUD TEMPERATUR SaRS8SEBSESBBS o fe) to 20 30 40 50 60 70 80 90 100s tO AVERAGE FORWARD CURRENT = AMPERES FIGURE 3. Maximum allowable stud temperature. R pp we- 5 | R i A 4-9 ! OB | R L- pe aw pooh 4 FORWARD BLOCKING CURRENT R R R VOLTAGE SUPPLY rn SUPPLY ~OC " RESISTOR R IS FOR EQUAL CURRENT DISTRIBUTION BETWEEN PARALLELED CELLS, APPROXIMATELY 0.005 OHM FIGURE 4. Basic test circuit for intermittent life test. 12 Wu.s. GOVERNMENT RINTING OF FICE: 1982505-022/2736