Phase Control Thyristor 1200A, 1250A, type T173-1250 (5000V – 6500V)

Average forward current, ITAV 1250A
Voltage, VDRM/VRRM 5000–6500V
Voltage code, VRRM / 100 50 – 65
T173-1250 on request
Dimensions ØD×Ød×H
112x75x26 mm
Weight 1200 g
Datasheet Datasheet

Phase Control Thyristor T173-1250 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 1250A with frequency up to 500Hz in circuits with voltages up to 5000V – 6500V (voltage class from 50 to 65). Thyristor dimensions ØDxØdxH – 112x75x26 mm (outer case diameter X contact surface diameter X case height), weight – 1200 g.

Thyristor ratings: T173-1250-50 (1250A 5000V), T173-1250-52 (1250A 5200V), T173-1250-54 (1250A 5400V), T173-1250-56 (1250A 5600V), T173-1250-58 (1250A 5800V), T173-1250-60 (1250A 6000V), T173-1250-62 (1250A 6200V), T173-1250-64 (1250A 6400V), T173-1250-65 (1250A 6600V).

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 1100A, 1150A, 1200A, 1250 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.

Read more

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 T173-1250:

Thyristor specifications T173-1250
Maximum allowable average forward current (Case temperature) IT(AV) (Tcase) 1240 A (85ºC)
1530 A (70ºC)
Repetitive peak off-state voltage; Repetitive peak reverse voltage VDRM/VRRM 5000-6500 V
RMS on-state current ITRMS 2400 A
Surge on-state current ITSM 26 kA
Safety factor I2t 3400 kA2·s
Peak on-state voltage, max VTM 2.40 V
Peak on-state current ITM 3930 A
On-state threshold voltage, max VT(TO) 1.30 V
On-state slope resistance, max rT 0.450 mΩ
Turn-off time, max tq 1000 µs
Repetitive peak off-state and Repetitive peak reverse currents, max IDRM/IRRM 200 mA
Critical rate of rise of off-state voltage, min (dVD/dt)cr 1000-2000 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) 0.012 ºC/W
Clamping force Fm ±10% 50 kN
Weight, approx. W 1200 g
Package type, Dimensions ØDxØdxH PT73
112x75x26 mm
Recommended heatsinks Heatsinks O173, O273
Datasheet PDF PDF

Part Numbering Guide for SCR Thyristors T173-1250:

T 173 1250 65 4 3
T Thyristor, brand AS ENERGITM
173 Thyristor type (disc type).
1250 Average current in open state IT(AV), Amp.
65 Voltage class VRRM / 100  (Nominal voltage – 6500 V).
4 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, µs not standardized 800 630 500 400 320 250 200 160 125 100

Polarity (anode, cathode, gate) and dimensions of disc thyristor T173-1250:

Thyristor polarity Dimensions

Thyristor T173-1250 datasheet:

PDFDownload pdf datasheet for thyristors T173-1250

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 supply products all over the world.

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

[email protected]

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: "Water Heatsink SS series", "Air Heatsink SF series", and also "Air-heatsink" and "Water-heatsink".

Photo of Phase Control Thyristor SCR:

CancelWrite Comment or Review:

Here you can ask a question about the technical features of the products or write a review about the company.

We also invite you for discussion about electrical engineering and electronics, share your experience, knowledge, express your opinion.

Please send commercial request using the Cart or E-mail (not here).

Featured Products:


Tags: thyristor 1250a, thyristor 1250 ampere, T173-1250 technical data sheet, circuits, thyristor 1250a manufacturer, thyristor SCR 1250A 5000V, thyristor SCR 1250A 6500V with a heat sink, semiconductor thyristor SCR 1100a 1150a 1200a 1250a 1250a replacement equivalent Dynex, Vishay, Infineon EUPEC, IXYS, Westcode, ABB, AE, AEI, AEG, Techsem, SEMPO Electronic Limited, ESTEL, Lamina, Siemens AG, Mitsubishi, thyristors catalog, thyristor 1250a datasheet pdf, certificate, press pack thyristor capsule type, tablet, disk, Russian Thyristor, factory manufacturer of power scr thyristor, semiconductor thyristor, thyristor price list, order, silicon controlled rectifier


Selected Products: