TO-92 TO-218AC TO-202AB TO-218X THERMOTAB TO-220AB General Description The Teccor Electronics line of thyristor SCR semi-conductors are half-wave, unidirectional, gate-controlled rectifiers which comple- ment Teccor's line of sensitive SCRs. Teccor offers devices with ratings of 1-70 amps and 50-800 volts, with gate sensitivities from 10-50 milliamps. If gate currents in the 12-500 microamp ranges are required, please consult Teccor's sensitive SCR tech- nical data sheets. Electrically Isolated Packages Teccor's SCRs are available in a choice of nine different device packages. Four (of the eight) packages are offered in electrically isolated construction where the case or tab is internally isolated to allow the use of low-cost assembly and convenient packaging techniques. The Teccor line of SCRs features glass passivated device junc- tions to ensure long term device reliability and parameter stabil- ity. Teccor's glass offers a rugged, reliable barrier against junction contamination. SCRs (1-70 Amps) Variations of devices covered in this data sheet are available for custom design applications. Please consult the factory for more information. Features Electrically-isolated package * High voltage capability 50 up to 800 Volts * High surge capability up to 950 Amps Glass passivated chip Teccor Electronics, Inc. 6-1 (972) 580-7777 SCRsElectrical Specifications Isolated Non-lsolated Maximum On-State Current (1) (2) TO-92 | TO-220AB | TO - 202AB | TO -220AB Dimensions section for variations. S0506L S1006L $2006L S4006L S6006L S8006L SOS06F1 $1006F1 $2006F1 S4006F1 S6006F1 General Notes All measurements are made at 60Hz with a resistive load at an ambient temperature of +25C unless otherwise specified. Operating temperature range (Ty) is -65C to +125C for TO-92 devices and -40C to +125C for all other packages. Storage temperature range (Tg) is -65C to +150C for TO-92 devices, -40C to +150C for TO-202 and TO-220 devices, -40C to +125C for all others. Lead solder temperature is a maximum of 230C for 10 seconds maximum; 1/16" (1.59mm) from case. The case temperature (Tc) is measured as shown on dimensional outline drawings. See Package Dimensions section of this catalog. Repetitive Peak Off-State Forward & Reverse Voltage (4) DC Gate Trigger Peak On-State Voltage at Max Rated Vp = 12VDC RMS R,_ = 60Q Current (8) Te = 25C (3) Peak Off-State Forward & Reverse Current Current at Vp = 12VDC Vorm & Venu R, = 6022 (13) DC Gate- Trigger Voltage Volts 25C | 125C MAX | MIN mAmps To=,1c= 100C , 125C MAX To= 25C Electrical Specification Notes (1) (2) (3) (4) (5) (6) (7) (8) (9) See Figures 6.5 through 6.16 for current rating at specified operat- ing case temperature. See Figures 6.1 and 6.2 for free air current rating. See Figures 6.19 and 6.20 for instantaneous on-state current vs on-state voltage (typical). See Figure 6.18 for Ig7 vs Te. See Figure 6.17 for ly vs Te. For more than one full cycle rating, see Figure 6.23. See Figure 6.22 for ty, vs ler. See Figure 6.21 for Vez vs Te. Test conditions are as follows: ly = 1A for 1.0A devices and 2A for all other devices. Pulse duration =: 50us, dv/dt = 20V/ps, di/dt = -10A/s for 1.0A devices, and -30A4/uS for other devices. gt = 200mMA at turn-on. (10) See Figures 6.5 through 6.10 for maximum allowable case tem- peratures at maximum rated current. (11) Pulse width < 10pus. (12) Initial on-state current = 200mA(DC) for 1A through 16A devices; 400mA(DC) for 20A through 70A devices. (13) Te =Ty for test conditions in off-state. SCRs Teccor Electronics, Inc. (972) 580-7777SCRs Peak One Cycle Surge Forward Current (6) (10) DC Holding | Peak Gate Current Current Gate Open (11) (5) (12) Peak Gate Power Dissipation (11) Average Gate Power Dissipation Watts 60Hz 50Hz Critical Rate of Applied Forward Voltage To = 100C MIN To = 125C MIN Maximum Rate-of-Rise of On-State Current let = 150mA with 0.1ps Rise Time RMS Surge (Non-Repetitive) On-State Current for a Period of 8.3 ms for Fusing Circuit Commutated Turn-Off Time (9) (10) Gate Controlled Turn-On Time Gate Pulse = 100mA Minimum Width=15uS with Rise Time < 0.1uS (7) Teccor Electronics, Inc. (972) 580-7777 SCRsElectrical Specifications Isolated Non-lsolated Maximum Repetitive DC Gate On-State Peak Trigger Current Off-State Current 1) Forward Vp = 12VDC and Ry = 60Q Reverse (4) Voltage TO-220AB TO-202AB TO-220AB See Dimensions section for variations. MAX MAX MIN MAX $0512R $1012R $2012R $4012R $6012R $8012R $0516R $1016R $2016R $4016R S6016R Peak Off-State Peak Forward and On-State Reverse Current Voltage at at Vory & Varo Max Rated (13) RMS Current To = 25C (3) To=| Tc=| Tos 25C | 100C }125C| Volts MAX MAX DC Gate Trigger Voltage Vp = 12VDC Ry = 602 (8) Volts To=|Tce= 25C | 125C MAX | MIN General Notes All measurements are made at 60Hz with a resistive load at an ambient temperature of +25C unless otherwise specified. * Operating temperature range (Ty) is -65C to +125C for TO-92 devices and -40C to +125C for all other packages. Storage temperature range (Ts) is -65C to +150C for TO-92 devices, -40C to +150C for TO-202 and TO-220 devices, -40C to +125C for all others. * Lead solder temperature is a maximum of 230C for 10 seconds maximum; 1/16" (1.59mm) from case. * The case temperature (Tc) is measured as shown on dimensional outline drawings. See Package Dimensions section of this catalog. SCRs 6-4 Teccor Electronics, Inc. (972) 580-7777SCRs pc Peak Peak Average Peak One Critical Holding Gate Gate Gate Cycle Surge | Rate-of-Applied Current Current Power Power Forward Forward Voltage Gate Open (11) Dissipation | Dissipation Current (5) (12) (11) (6) (10) (15) To= To= Watts 60Hz | 50Hz | 100C 125C MIN MIN RMS Surge Maximum Gate Controlled Circuit (Non-Repetitive) Rate-of- Turn-On Time Commutated On-State Current Change of Gate Pulse Jurn-Off for a Period of On-State = 100mMA Time 8.3 ms for Current Min. Width = 15us (9) (10) Fusing ler = 150mMA with Rise Time with 0. tus <0.1ps Rise Time (7) Electrical Specification Notes (1) See Figures 6.5 through 6.16 for current rating at specified operat- (12) ing case temperature. (2) See Figures 6.1 and 6.2 for free air current rating. (13) (3) See Figures 6.19 and 6.20 for instantaneous on-state current vs (14) on-state voltage (typical). (4) See Figure 6.18 for Ig7 vs Te. (5) See Figure 6.17 for ly vs Te. (6) For more than one full cycle rating, see Figure 6.23. (7) See Figure 6.22 for tg, vs Igy. (8) See Figure 6.21 for Vez vs Te. (9) Test conditions are as follows: iy = 1A for 1.0A devices and 2A for all other devices. Pulse duration = 50us, dv/dt = 20V/us, di/dt = -10A/ps for 1.0A devices, and -30A/us for other devices. Igy = 200mA at turn-on. (10) See Figures 6.5 through 6.10 for maximum allowable case tem- peratures at maximum rated current. (11) Pulse width < 10us. (15) Initial on-state current = 200mA(DC) for 1 through 16A devices; 400mA(DC) for 20A through 70A devices. Te =Ty for test conditions in off-state. The R, K or M package rating is intended for high surge condi- tion use only and not recommended for >50A(RMS) continuous current use since narrow pin lead temperature can exceed PCB solder melting temperature. Recommend for >50A(RMS) continu- ous current requirements, Teccor's J or W package. For various durations of an exponentially decaying current wave- form, see Figures 6.3 and 6.4. (t, is defined as 5 time constants.) Teccor Electronics, inc. 6-5 (972) 580-7777 SCRsElectrical Specifications tsolated TO TO 220AB 218X $0525L $1025L $2025L $4025L $6025L $8025L $0565J $1065J $2065J $4065J S6065J $8065J Non-lsolated a kK AG KAS TO TO TO 218AC 220AB 218X Dimensions section for variations. $0525R $1025R $2025R $4025R $6025R $8025R S0540R $1040R $2040R $4040R $6040R $8040R S0565K S$1065K $2065K S4065K S6065K S8065K Maximum On-State Current (1) (14) Repetitive Peak Off-State Forward and Reverse Voltage DC Gate Trigger Current Vp = 12VDC RL = 300 (4) MIN | MAX Peak Off-State Peak Forward and Reverse On-State Current at Vor and Varm Voltage at (13) Max Rated RMS Current To = 25C (3) Tz= | To= | To= 25C | 100C | 125C Volts MAX MAX See General Notes and Electrical Specification Notes on pages 6-4 and 6-5. SCRs 6-6 Teccor Electronics, Inc. (972) 580-7777SCRs DC Gate Trigger Voltage Vp = 12VDC Ry = 302 (8) Volts To= 125C MIN DC Holding Current Gate Open (5) (12) mAmps MAX Peak Gate Gurrent (11) Peak Gate Power Dissi- pation (11) Watts Average Peak One Critical Rate- RMS Surge Gate Cycle Surge of-Applied (Non-Repeti- Power | Forward Current Forward Voltage tive) Dissipa- | (8) (10) (15) tion On-State Current for a Period of 8.3 msec for Fusing Watts | 60Hz | 50Hz | To = 100C |}Tc =125C| Amps*Sec MIN MIN Maximum | Gate Controlled Circuit Rate-of- Turn-Cn Time | Commutated Change of Gate Pulse Turn-Off On-State = 150mA Time Current Min. Width (9) (10) Iqp = 150mMA} = 15S with with 0.11S Rise Time Rise Time <0.1uS (7) TYP See General Notes and Electrical Specification Notes on pages 6-4 and 6-5. Teccor Electronics, Inc. (972) 580-7777 SCRsElectrical Specifications THERMOTAB TO- 220AB Non-lsolated TO-220AB Isolated Non-lsolated TO- iam TO- 218AC Electrical !solation Teccors isolated SCR packages will withstand a minimum high potential test of 2500VAC(RMS) from leads to mounting tab over the device's operating temperature range. See table below for standard and optional isolation ratings. isolated * Isolated TO- 220AB = TO-218AC *For 4000V isolation, add V suffix to part number. *UL Recognized File #71639. SCRs Teccor Electronics, Inc. (972) 580-7777SCRs 120 ot + + r r CURRENT WAVEFORM: Sinusoidal i LOAD: Resistive or Inductive CONDUCTION ANGLE: 180 - 10 100 FREE AIR RATING 4 5 i Te. | 5 Pn! ~ Aas My, 0.8 ee ie Oo | ae Se 3 TT =o 80 Ia, 06 65 O, a <8 - NG 3 gs e S o es ZN SCS N 04 3 s v xa) a = 60 TEs Es q , 5 3S > S 02 =5 y OS = 2 40 ie. DS MN \ 7K N 0 < NY | 25 50 75 100 125 20 Case Temperature (Tc) - C 0 02 04 06 01 10 12 14 16 18 20 22 RMS On-State Current {l7(AMs))} - Amps Figure 6.1. Maximum Allowable Ambient Temperature vs RMS On- Figure 6.4 Peak Capacitor Discharge Current Derating for 12R, 16R, State Current and 25R 120 T r 7 ' 130 CURRENT WAVEFORM: Sinusoidal CURRENT WAVEFOAM: Sinusoidal LOAD: Resistive or Inductive MN LOAD: Resistive or Inductive, . 120 CONDUCTION ANGLE: 180 oO fe CONDUCTION ANGLE: 180 oO S CASE TEMPERATURE: Measure as |, 100 m= AIR RATING 4 : Ngee drawing = 110 oa < \ NY an 1 Sse By alo aN Bo NAS =~ 100 PrN == B60 73 igs So Qg 22 BAY, | =5 50 AMPS (RMS) SS CONTINUOUS CURRENT USE:, SINCE 1 NARROW PIN LEAD TEMPERATURE, i) _ CAN EXCEED PCB SOLDER MELTING ' TEMPERATURE. "J" OA "W" PACKAGES | ARE RECOMMEND FOR >S0AMPS (RMS) Cl NTINUOUS CURRENT REQUIREMENTS. J CURRENT WAVEFORM: Sinusoidal OAD: Rasistive or Inductive CONDUCTION ANGLE: 180 CASE TEMPERATURE: Measure as | shown on dimensional drawings BB AMP TO-218AC | (ISOLATED) / ~ 55 AMP TOQ-218AC S5AMP TO-220 _- (NON-ISOLATED) } a s l 1 ' ' ' L l ' l 20 30 40 50607075 RMS On-State Current [I7(@Rms)] - Amps 10 Figure 6.7 Maximum Allowable Case Temperature vs RMS On-State Current (10, 12, 16, and 20 Amps) Figure 6.10 Maximum Allowable Case Temperature vs RMS On-State Current (55 and 65 Amps) 130 120 Oo 410 on 20 BE Bg 10 = 3 =e 90 Oo 2a EE g0 ar =2 4 oc Oo 60 50 ISS. 35 AMP TO-218 (ISOLATED) =~ ~ oR > 25 AMP TO-220 (NON-ISOLATED) ~ a 25 AMP TO-220 J (ISOLATED) o Sh Nw t CURRENT WAVEFORM: Sinusoidal LOAD: Resistive or Inductive | CONDUCTION ANGLE: 180 CASE TEMPERATURE: Measure as shown oO 4 8 on dimensional drawings ee ee 12 16 20 24 28 32 36 RMS On-State Current [It(RMs)] - Amps 130 9 G 120 CONDUCTION ANGLE: 180 Ee CASE TEMPERATURE: Measure as > shown on dimensional drawings 5 110 N g a 100 7 5 aN Ke 7a 2 90 Go Oo oD 2 2 3 = 70 < E 60 = 50 CURRENT WAVEFORM: Sinusoidal LOAD: Resistive os inductive N\ 9 2 4 & B Average On-State Current (lt(avy] - Amps RMS On-State Current [tt(RMs)! - Amps Average On-State Current (ty AV)! - Amps: Figure 6.8 Maximum Allowable Case Temperature vs RMS On-State Figure 6.11 Maximum Allowable Case Temperature vs Average On- Current (25 and 35 Amps) State Current (TO-92, 1 Amp) 130 __.- 130 ry ao + cones ee wpe ee CURRENT WAVEFORM: Sinusoidal CURRENT WAVEFORM: Sinusoidal . seebi i LOAD: Resistive or Inductive 120 ie CONDUSTION ANGLE: 180" 4 CONDUCTION ANGLE: 180 NS CASE TEMPERATURE: Measure as o CASE TEMPERATURE: Measure as shown o shown on dimensional drawings ~ 120 - on dimensinnal Grawings / 110 poo o | 42 AMP TO-220 23 e 1 (NON-ISOLATED) , a 0 @ 71 ' ek 100 Ss 2 10 DN | 10 AMP TO-220 (ISOLATED)! 3 2 55 AMP Torx | 5 > & 10 AMP TO-202 a2 go |. (NON ISOLATED) = Sq, ~ 5 poe. 30 AMP 10.220 65 AMP TO-218X ep, 8 S/ (NONISOLATED) = ISOLATED | EE 20 USOLATED) hM & 100 | Ro ~ a 8 AMP TO-220 =o 70 z (NON-ISOLATED) a 40 AMP TO-220 ~~ < | C6 (NON-ISOLATED) 5 90 anne nrg - E 8 AMP TO-220 (ISOLATED) | | g 8 AMP TO-202 | | 50 ' | | ! | BO Id | - L. 1 1. Oo 10 20 30 40 50 60 70 0 1 2 3 4 5 6 7 8 Figure 6.9 Current (40-70 Amps) Maximum Allowable Case Temperature vs RMS On-State Figure 6.12 Maximum Allowable Case Temperature vs Average On- State Current (8, 10, and 12 Amps) SCRs Teccor Electronics, Inc. (972) 580-7777SCRs 130 16 CURRENT WAVEFORM: Sinusoidal 120 Alp LOAD: Resistive or Inductive SS 70.5 CONDUCTION ANGLE: 180 q 20 Ne CASE TEMPERATURE: Measured as o 110 QWig6) shown on dimensional drawings. 3 AE g = 100 2s Sy 20 AMP TO-220 E 90 J PSN sotateo) a | ce / 35 380 4 2 10 AMP TO-220 oO 70 ({NON-ISOLATED) 60 k 15 AMP TOQ-220 jt 50 (ISOLATED) J 0 2 4 6 8 10 12 14 Average On-State Current thy AV)! - Amps 130 120 = _ fo} 100 8 Maximum Allowable ao 3S Case Temperature (Tp) - C ~ 3 a a oS CURRENT WAVEFORM: Sinusoidal LOAD: Resistive or Inductive _.. CONDUCTION ANGLE: 180 CASE TEMPERATURE: Measure as shown on dimensional drawings *55 AMP TO-21BAC (NON-ISOLATED) Se | 55 AMP TO-220 (NON-ISOLATED) foo 65 AMP TO-218AC (ISOLATED) SURGE CONDITION USE ONLY AND NOT RECOMMENDED FOR >32 AMPS (AV) CONTINUOUS CURRENT USE SINCE ~ NARROW PIN LEAD TEMPERATURE CAN EXCEED PCB SOLDER MELTING TEMPERATURE. J* OR W" PACKAGES ARE RECOMMEND FOR >32 AMPS (AV) NS "THE "R*, *K", OR "M" wcutce : RATING |S INTENDED FOR HIGH wo MI i l ( sot a CONTINUOUS CURRENT REQUIREMENTS. 10 20 30 Average On-State Current [It(ayy] - Amps 40 50 Figure 6.13 Maximum Allowable Case Temperature vs Average On- State Current (10-20 Amps) Figure 6.16 Maximum Allowable Case Temperature vs Average On- State Current (55 and 65 Amps) 130 1 T , CURRENT WAVEFORM: Sinusoidal LOAD: Resistive or Inductive A, 120 CONDUCTION ANGLE: 180 4 L CASE TEMPERATURE: Measure as = shawn on dimensional drawings @ 110 NX 25 ~_ i 4 9 2 ae s & 100 & od Ee Q 90 3 S OD @ Bm 80 San g m&N 2 =z 70 a = 60 a = 50 0 4 a 12 16 20 24 Average On-State Current [IT/ay)] - Amps 2.0 18 H ly (Tc = 25C) Ratio of a T I T INITIAL ON-STATE CURRENT = 200 mA (DC) FOR 1-20 AMP DEVICES AND 400 mA (DC) FOR 25-70 AMP DEVICES 400-15 +25 +65 Case Temperature (Tc) - C +105 +125 Figure 6.14 Maximum Allowable Case Temperature vs Average On- State Current (25 and 35 Amps) Figure 6.17 Normalized DC Holding Current vs Case Temperature 130 _ CURRENT WAVEFORM: Sinusoidal LOAD: Resistive or Inductive 120 |____ GONDUCTION ANGLE: 180 Oo CASE TEMPERATURE: Measure as shown y 110 on dimensional drawings 2 coat poms te a _. ge ge 100 =+-_70 AMP TO-218X | 5 < 2 YS (NON-ISOLATED) = 28 90 > 3 5 55 AMP TO-218x~ * Sogo | (NON-ISOLATED) IS g pa 3 3 | \ o 70 | 65 AMP TO-218X_, _ = (ISOLATED) & 60 | . 40 AMP T0-220 NON-ISOLATED: so LS ? ) -40 15 +25 +65 +105 +125 10 20 30 40 50 Average On-State Current (tay! - Amps Case Temperature (Tc) Cc Figure 6.15 Maximum Allowable Case Temperature vs Average On- Figure 6.18 Normalized DC Gate-Trigger Current vs Case Temperature State Current (40-70 Amps) Teccor Electronics, Inc. (972) 580-7777 SCRsElectrical Specifications 90 (Typical) (6-25 Amps) 15 : ga 4 & * we Ns = 70 > ' = 6 HORN = i Ss 60 a 1.0 t K| ou = 50 2 2 Mm 2 15-20 AMP cc ! H 40 ot J < 12 AMP DEVICES > I i oO _ 5 1 o 30 _ f Ss 6-10 AMP DEVICES | a o I 2 20 zs | 2 oc I i S 10 wo \ i Cc Q = 1 AMP 5 -40 -15 +25 +65 +105 4125 oO 6 8 1.0 1.2 1.4 1.6 Instantaneous On-State Voltage (v7) - Volts Case Temperature (Tc) - C Figure 6.19 Instantaneous On-State Current vs On-State Voltage Figure 6.21 Normalized DC Gate-Trigger Voltage vs Case Temperature 200 7 TS 7 180 | : 6-12 AMP DEVICES Tg = 25C _ oe 6 \ H | 160 Tg = 25C J. | 2 : / 15-36 AMP DEVICES i 5 a & 2 140 { g 5 \= : i 5< 120 65 & 70 AMP DEVICES 3 \ \ - T S 2E 100 Ts L e 4 | Kore B= = 4 \ 40-70 AMP DEVICES = E 80 AL | & , 1 AMP ML = E ~~~ DEVICE i i Be 60 55 AMP DEVICES /- O1) 5 oR SSN 40 Boo 7 20 L 3 JA 35-40 AMP DEVICES a | L 0 6 8 1.0 1.2 1.4 1.6 0. | 10 20 30 40 50 60 80 100 200 Instantaneous On-State Voltage (v7) - Volts OC Gate Trigger Current (Iq7} - mA Figure 6.20 Instantaneous On-State Current vs On-State Voltage Figure 6.22 Typical Turn-On Time vs Gate-Trigger Current (Typical) (35-70 Amps) SCRs Teccor Electronics, Inc. (972) 580-7777SCRs 1000 800 SUPPLY FREQUENCY: 60 Hz Sinusoidal LOAD: Resistive 600 RMS ON-STATE CURRENT: [IT(RMS)I: 500 at T 400 300 70 ES 55 VICES 200 oan = 5 Aup 100 80 60 50 40 30 20 10 8 6 - GATE CONTROL MAY BE LOST ~ DURING AND IMMEDIATELY 4 FOLLOWING SURGE CURRENT _ INTERVAL. 3 OVERLOAD MAY NOT BE REPEATED UNTIL JUNCTION TEMPERATURE HAS RETURNED TO STEADY-STATE RATED VALUE. 1 bo 1 2 3 45678 10 20 30 40 60 80100 200 300400 600 1000 Surge Current Duration - Fuil Cycles Figure 6.23 Peak Surge Current vs Surge Current Duration T T 1 T 18 CURRENT WAVEFORM: Half Sine Wave CURRENT WAVEFORM: Half Sine Wave LOAD: Resistive or Inductive o CONDUCTION ANGLE: 180 7 g LLOAD: Resistive or Inductive A; > = = CONDUCTION ANGLE: 180 VY = = 14 { 1 fA 3 1 of 2S 5-20 Ae oevices YY esi? a= | Sa sf DA 12 AMP DEVICE 4 A 9A 8 ca, a. 1 CAMP DEVICE c 6-10 AMP DEVICES 8 eS 6 a 3 a 8g WA SS 6 A of 4 ZL zB ooo tg 7 Qa 4 fu} J a | ri 2 = ~~ & 2 0 ; | oo 2 4 6 8 1 o 2 4 6 8 10 12 14 16 18 20 RMS On-State Current [I7(RMs)l - Amps RMS On-State Current [It(RMS)] - Amps Figure 6.24 Power Dissipation (Typical) vs RMS On-State Current Figure 6.25 Power Dissipation (Typical) vs RMS On-State Current (TO-92, 1 Amp) (6-20 Amps) Teccor Electronics, Inc. 6-13 SCRs (972) 580-7777Electrical Specifications Average On-State Power Dissipation [Pp(avy] - Watts 32 T T T T T T CURRENT WAVEFORM: Haif Sine Wave 28 |LOAD: Resistive or Inductive __t oS) CONDUCTION ANGLE: 180 a Cr 24 ae 2 20 a i | A a4 12 SG ot iS 8 Rs FD 4 MA po a o 4 8 12 16 20 24 28 32 3 RMS On-State Current [!T(Ris)l - Amps Figure 6.26 Power Dissipation (Typical) vs RMS On-State Current (25 and 35 Amps) Average On-State Power Dissipation Poy av)! - Watts 60 . - CURRENT WAVEFORN: Half Sine Wave LOAD: Resistive or Inductive Be 50 |. CONDUCTION ANGLE: 180 . av > 40 web ce a s 2 S ee 30 7 | 4 Oo a _ 0 10 20 30 40 50 60 70 RMS On-State Current ['t(RMs)! - Amps Figure 6.27 Power Dissipation (Typical) vs RMS On-State Current (40-70 Amps) SCRs Teccor Electronics, Inc. (972) 580-7777