Inverter Grade Thyristors (Capsule Type)
Thyristors may be used to bond a source of stored energy, such as a capacitor to a load, or to bypass and protect the load in the case of a crowbar circuit. In these pulsed power applications where the rate of rise of current is very fast, the pulse power switch is acting as a closing switch and ordinary phase control thyristors (SCRS) are probable to fail due to the high di/dt experienced?
Thyristors or SCRs (silicon controlled rectifiers). The Phase Control SCR provides phase-control of ac signals with a line frequency of 50-60 Hz. The Inverter SCR is used in pulsed power applications connecting higher frequencies. The main difference between the two families is the turn-off time (tq). Inverter SCRs typically have a tq of less than 30 microseconds (µs). Similar phase control SCRs has tq ratings of several hundred µs.
| Device | VRRM/ VDRM | IT(AV) | TC | VTM | ITM | ITSM | di/dt | dv/dt | IGT | VGT | IRRM/ IDRM | TVJ | Tq | Rth(j-c) | Mounting | Outline |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Type | Force | |||||||||||||||
| (V) | (A) | (0C) | (V) | (V) | (A) | (A/µS) | (V/µS) | (mA) | (V) | (mA) | (0C) | (µSec) | (0C/W) | (KN) | ||
| DCR444 | 400-1600 | 280 | 80 | 2 | 600 | 5000 | 500 | 200 | 200 | 3 | 25 | 125 | 20 | 0.09 | 5 | T |
| DCR855 | 1200-1600 | 480 | 80 | 2.8 | 2000 | 8000 | 500 | 200 | 200 | 3 | 60 | 125 | 40 | 0.05 | 15 | G |
| DCR944 | 3000-3400 | 850 | 80 | 2.4 | 1500 | 13000 | 500 | 500 | 250 | 3 | 100 | 125 | 50 | 0.026 | 22 | D |
| DCR915 | 1200-1400 | 1080 | 80 | 1.75 | 2000 | 20000 | 500 | 300 | 200 | 3 | 60 | 125 | 40 | 0.026 | 22 | D |
| DCR1059 | 1800-2100 | 1080 | 80 | 1.45 | 1000 | 18000 | 800 | 200 | 350 | 3 | 60 | 125 | 40 | 0.028 | 22 | D |
