SCR DATA

UNIT SERIES
Silicon Control Rectifiers 		22CR 70CR 300CR-* 240CRD 550CRE 750CRG 900CRH 1250CRH 1750CRJ 1700CRR
40CR 150CR 350CR
350CR-C
353CR-C 		300CRD 550CRG 900CRG 1000CRH 2000CRJ 2500CRR
Electrical Characteristics Maximum Ratings Symbol Units  
RMS Forward Current IT (RMS) A 35 125 470 380 865 1,100 1,400 1,965 2,200 2,600
99 235 550 470 1,400 1,600 3,100 4,000
Average
Forward Current		 IT (AV) A 22 80 300 240 550 750 900 1,250 1,750 1,700
63 150 350 300 900 1,000 2,000 2,500
Peak One-cycle Surge @ 8.3ms. IT SM A 285 1,800 10,000 5,500 9,000 11,000 18,000 27,000 30,000 26,000
1,172 4,000 11,000 15,000 13,500 40,000 45,000
I2t @ 8ms. I2t A2/sec 375 13,500 416,000 125,000 265,000 500k 1.31m 3,040,000 6.63m 2.75m
7,049 66,000 935k 2.089m 6.67m 8.5m
Maximum Forward Voltage Drop @ 25°C at Noted Amps VTM V


A 		1.9 3.0 1.5 2.1 1.84 1.80 2.1 160 1.45 1.85
2.10 2.25 1.75 1.64 1.45 2.15 1.20
90 1,000 1,100 1,000 1,500 1,700 2,000 2,500 3,000 2,000
195
Maximum Voltage Ratings VRRM
VDRM 		V 1,200 1,600 2,000 1,200 2,200 2,400 3,800 2,400 2,400 4,500
1,400 1,500 1,800 1,200 2,200 2,400 2,200
Maximum Thermal Resistance Junction to Case °C/W 0.35 0.23 0.09 0.10 0.045 0.04 0.03 0.03 0.015 0.012
0.13
Maximum Rate of Rise on State Current (non-rep.) di/dt A/µ sec. 400 800 800 800 600 400 1,000 600 400 600
Minimum Critical Exponential Rate of Rise Off - State Voltage dv/dt
125° 		V/µ sec. 100 300 300 300 300 300 300 200 300 1,000
500
200 500
Maximum Gate Voltage to Trigger VGT V 3.00 3.00 3.00 3.00 3.00 3.00 3.00 3.00 3.00 4.5
Maximum Non Triggering Gate Voltage VGD V 0.25 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15
Typical Gate Current to Trigger IGT MA 40 150 150 150 150 150 150 150 200 300
100
Maximum Turn Off Time 200 Volts/µ second reapplied Tq µ second   10-25 25 10-30 15-25 10-25 250 250
TYP 		250
TYP 		250
TYP
10-25       25-50
Mechanical Characteristics       For Tq Add Letter "X" and Turn Off time After Voltage
Mounting Torque ----- inch Lbs. 30 130 300 ----- ----- ----- ----- ----- ----- -----
300
Thread Size ----- ----- 1/4-28 1/2-20 3/4-16 ----- ----- ----- ----- ----- ----- -----
3/4-16
Mounting Force PSI Gauge MIN Lbs. ----- ----- ----- 1,000 2,000 3,000 5,000 5,000 9,000 9,000
MAX 1,400 2,500 3,700 6,000 6,000 11,000 11,000
Maximum Operating Temperature on All SCRs (TJ)=125°C

SCR NOMENCLATURE
All SCRs are negative base. Flat packs have one polarity, to reverse, point the arrow of the polarity sign to the side you want positive. When the amperage of the device is unknown, check the stud or puck size and select a device of the same size with the highest rating available. When the voltage of the device is unknown, use the transformer secondary voltage or the dc voltage times 2.5 for device voltage.


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