Datasheet TCR22-x (Littelfuse) - 6

Thyristors
1.5 Amp Sensitive SCRs
Figure 17: Surge Peak On-State Current vs. Number of Cycles
100.0 SUPPLY FREQUENCY: 60 Hz Sinusoidal LOAD: Resistive RMS On-State Current: [I ]: Maximum Rated T(RMS) Value at Specified Case Temperature
) – Amps
10.0 Notes:
TSM
1. Gate control may be lost during and immediately following surge current interval. 2. Overload may not be repeated until junction temperature has returned to steady-state 1.0 rated value.
Peak Surge (Non-repetitive) On-state Current (I
0.1 1 10 100 1000
Surge Current Duration -- Full Cycles Figure 18: Simple Test Circuit for Gate Trigger Voltage and Current
Reset Note: V1 — 0 V to 10 V dc meter Normally-closed V — 0 V to 1 V dc meter GT Pushbutton I — 0 mA to 1 mA dc milliammeter G R1 — 1 k potentiometer To measure gate trigger voltage and current, raise gate 100 voltage (V ) until meter reading V1 drops from 6 V to 1 V. GT Gate trigger voltage is the reading on V just prior to V1 + GT D.U.T. dropping. Gate trigger current I Can be computed from 6V GT DC I IN4001 – GT the relationship IG R1 V1 100 1 k V V GT (1%) GT I = I - ____ Amps GT G 1000 where I is reading (in amperes) on meter just prior to V1 G dropping Note: I may turn out to be a negative quantity (trigger GT current flows out from gate lead). If negative current occurs, I value is not a valid reading. Remove 1 k resistor GT and use I as the more correct I value. This will occur on G GT 12 µA gate products. © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 01/16/18