LETTER SYMBOLS FOR THYRISTORS7
SymbolParameter (English)
UDRMRepetitive peak off‑state voltage
URRMRepetitive peak reverse voltage
URSMNon‑repetitive peak reverse voltage
ITAVMean on‑state current
ITRMSRMS on‑state current
ITSMSurge on‑state current
i2tLimiting load integral
TstgStorage temperature
TjJunction temperature
TcCase temperature
MTightening torque
FMounting force
UTMPeak on‑state voltage (25 °C)
UT(TO)Threshold voltage
rTSlope resistance
IRRMRepetitive peak reverse current
IGTGate trigger current
UGTGate trigger voltage
IGQMGate non‑trigger (latching) current
ILLatching current
IHHolding current
tqTurn‑off time (50 V/µs)
tgtTurn‑on time
tdDelay time
tsStorage time
(di/dt)critCritical rate of rise of on‑state current
(du/dt)critCritical rate of rise of off‑state voltage
PRSMSurge reverse power dissipation (10 µs)
RthJCThermal resistance, junction‑case
THYRISTOR GROUP CODES7

(du/dt)crit — Critical Rate of Rise of Off‑State Voltage

V/µsGroup symbolCode No.
Not limited00
20P31
50E32
100A33
200P24
320K25
500E26
1000A27
1600T18
2000P1–
2500M19

tq — Phase‑Control Thyristors (50 V/µs)

tq, µsGroup symbolCode No.
Not limited00
800B2–
630C2–
500E21
400H2–
320K22
250M2–
200P23
160T2–
125X24
100A3–
80B3–

tq — Fast Thyristors (50 V/µs)

tq, µsGroup symbolCode No.
Not limited00
63C31
50E32
40H33
32K34
25M35
20P36
16T37
12.5X38
10A4–
8B4–
6.3C4–
5E4–
4H41
3.2K42

tgt — Turn‑On Time Groups

tgt, µsGroup symbolCode No.
Not limited00
16T31
10A4–
8B4–
6.3C4–
4H41
3.2K42
2.5M43
2P44
1.6T45
1.25X46
1A57
0.63C58
0
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Wintech Automation LTD
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Power Semiconductor
About
Contact
Schedule a call
Our Capabilities
Our Services
Power Semiconductor
About
Contact
Schedule a call

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