Phase Control Thyristor T123-320 (400 – 1600V)

Average forward current, ITAV 320A
Voltage, VDRM/VRRM 400–1600V
Voltage code, VRRM / 100 4 – 16
T123-320 on request
Dimensions ØD×Ød×H
42x19x14 mm
Weight 70 g
Datasheet Datasheet

Phase Control Thyristor T123-320 AS ENERGITM is general purpose disc thyristor, also known as Silicon Controlled Rectifier (SCR). This is a power thyristor designed for converting and control DC and AC currents up to 320A with frequency up to 500Hz in circuits with voltages up to 400V – 1600V (voltage class from 4 to 16). Thyristor dimensions ØDxØdxH – 42x19x14 mm (outer case diameter X contact surface diameter X case height), weight – 70 g.

Thyristor ratings: T123-320-4 (320A 400V), T123-320-5 (320A 500V), T123-320-6 (320A 600V), T123-320-7 (320A 700V), T123-320-8 (320A 800V), T123-320-9 (320A 900V), T123-320-10 (320A 1000V), T123-320-12 (320A 1200V), T123-320-14 (320A 1400V), T123-320-16 (320A 1600V).

The anode and cathode of the thyristor (polarity) are determined by the symbol on the case. Thyristors are in a press pack disc (capsule, tablet) housing. This SCR thyristor can be an alternative product, replacement, analog, equivalent for other types thyristors 280A, 290A, 300A, 310A, 320 amp in a disk package.

For cooling during the operation of power thyristors they are mounted with coolers (heat sinks). Depending on the amount of heat generated and the working conditions of the semiconductors, either natural air flow cooling or forced cooling can be used.

When assembling, the necessary clamping force Fm specific for each type of thyristor case (indicated in the parameter table) must be provided.

Thyristors SCR disc type are used in power equipment – power and control units, power regulators, converters (e.g. melting furnaces), controllers where fast switching and control of currents is necessary.

Specifications and parameters, datasheets PDF, sample technical passport, dimensions, outline drawings, case diagrams thyristors, recommended coolers are listed below.

Our company provides a quality guarantee for power scr thyristors of 2 years from the date of purchase. When supplying thyristors, if necessary, we provide technical passport, certificate of conformity.

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The final price for phase control disc thyristors depends on the voltage class, quantity, delivery terms, manufacturer, country of origin and form of payment.

General specifications of phase control thyristors T123-320:

Thyristor specifications T123-320
Maximum allowable average forward current (Case temperature) IT(AV) (Tcase) 320 A (85°C)
410 A (70°C)
Repetitive peak off-state voltage; Repetitive peak reverse voltage VDRM/VRRM 400-1600 V
RMS on-state current ITRMS 640 A
Surge on-state current ITSM 5.0 kA
Safety factor I2t 125 kA2·s
Peak on-state voltage, max VTM 1.65 V
Peak on-state current ITM 1005 A
On-state threshold voltage, max VT(TO) 1.04 V
On-state slope resistance, max rT 0.64 mΩ
Turn-off time, max tq 160 µs
Repetitive peak off-state and Repetitive peak reverse currents, max IDRM/IRRM 20 mA
Critical rate of rise of off-state voltage, min (dVD/dt)cr 500-1600 V/µs
Gate trigger direct voltage, max VGT 2.5 V
Gate trigger direct current, max IGT 250 mA
Critical rate of rise of on-state current (diT/dt)cr 200 A/µs
Temperature of p-n junction, max Tvj max 125 ºC
Thermal resistance, junction to case, max Rth(j-c) 0.08 ºC/W
Clamping force Fm ±10% 6 kN
Weight, approx. W 70 g
Package type, Dimensions ØDxØdxH PT21-1
42x19x14 mm
Recommended heatsinks Heatsinks O123
Datasheet PDF PDF

Part Numbering Guide for SCR Thyristors T123-320:

T 123 320 16 7 3
T Thyristor, brand AS ENERGITM
123 Thyristor type (disc type).
320 Average current in open state IT(AV), Amp.
16 Voltage class VRRM / 100  (Nominal voltage – 1600 V).
7 Parameter of the critical rate of rise of off-state voltage (dVD/dt)cr:
Alpha-numeric coding P2 K2 Е2 A2 T1 P1 M1
Digital coding 4 5 6 7 8 9
(dVD/dt)cr, V/µs 200 320 500 1000 1600 2000 2500
3 Parameter of turn-off time tq:
Alpha-numeric coding 0 B2 C2 E2 H2 K2 М2 P2 T2 X2 A3
Digital coding 0 1 2 3 4
tq, V/µs not standardized 800 630 500 400 320 250 200 160 125 100

Polarity (anode, cathode, gate) and dimensions of disc thyristor T123-320:

Thyristor polarity Dimensions

Thyristor T123-320 datasheet:

PDFDownload pdf datasheet for thyristors T123-320

Technical Passport for Phase Control Thyristors (sample):

When supplying thyristors, if necessary, we provide technical passport and certificate of conformity.

  • Technical Passport
  • Technical Passport
  • Technical Passport

High Power Semiconductors AS ENERGITM

Our company is engaged in the manufacturer and sale of wide range of power semiconductors (power thyristors, modules, rectifier diodes, rotor and welding diodes, triacs etc.) currents up to 15000A and voltages to 9000V, and air and water heatsinks to them. You can buy semiconductors in any volumes, and when ordering large lots, the price will be lower.
We have earned the trust of customers and cooperate with companies from neighboring countries.

For questions regarding the acquisition of Power Thyristors, Diodes, Modules send an email request to:

And we will provide you a commercial offer for delivery.
For a large number, we will provide an individual price!!!

We are open to manufacture products at our production facilities
according to your requests and technical task.

Heat sinks for power disc thyristors:

Heat sinks (radiators) are used for single- and double-sided cooling of power semiconductor devices in disc design.

Heat sinks of coolers are made of aluminum radiator profiles and do not require additional protective coating when used in various climatic conditions.

See for more information about coolers "Air-heatsink" and "Water-heatsink".

Photo of Phase Control Thyristor SCR:

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