Phase Control Thyristor 400A, type T443-400 (3800V – 4200V)
|Average forward current, ITAV||400A|
|Voltage code, VRRM / 100||38 – 42|
Phase Control Thyristor T443-400 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 400A with frequency up to 500Hz in circuits with voltages up to 3800V – 4200V (voltage class from 38 to 42). Thyristor dimensions ØDxØdxH – 60x38x20 mm (outer case diameter X contact surface diameter X case height), weight – 240 g.
Thyristor ratings: T443-400-38 (400A 3800V), T443-400-40 (400A 4000V), T443-400-42 (400A 4200V).
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 350A, 370A, 390A, 400 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.
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 T443-400:
|Maximum allowable average forward current (Case temperature)||IT(AV) (Tcase)||400 A (92ºC)
455 A (85ºC)
|Repetitive peak off-state voltage; Repetitive peak reverse voltage||VDRM/VRRM||3800-4200 V|
|RMS on-state current||ITRMS||628 A|
|Surge on-state current||ITSM||6.5 kA|
|Safety factor||I2t||210 kA2·s|
|Peak on-state voltage, max||VTM||2.25 V|
|Peak on-state current||ITM||1256 A|
|On-state threshold voltage, max||VT(TO)||1.117 V|
|On-state slope resistance, max||rT||1.245 mΩ|
|Turn-off time, max||tq||500 µs|
|Repetitive peak off-state and Repetitive peak reverse currents, max||IDRM/IRRM||100 mA|
|Critical rate of rise of off-state voltage, min||(dVD/dt)cr||200-2500 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||500 A/µs|
|Temperature of p-n junction, max||Tvj max||125 ºC|
|Thermal resistance, junction to case, max||Rth(j-c)||0.035 ºC/W|
|Clamping force||Fm ±10%||15 kN|
|Weight, approx.||W||240 g|
|Package type, Dimensions||ØDxØdxH||T.C2 (PT42)
|Recommended heatsinks||Heatsinks||O143, O243, O343, OM103, OM104|
Part Numbering Guide for SCR Thyristors T443-400:
|T||–||Thyristor, AS ENERGITM|
|443||–||Thyristor type (disc type).|
|400||–||Average current in open state IT(AV), Amp.|
|42||–||Voltage class VRRM / 100 (Nominal voltage – 4200 V).|
|5||–||Parameter of the critical rate of rise of off-state voltage (dVD/dt)cr:
|2||–||Parameter of turn-off time tq:
Thyristor T443-400 datasheet:
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.
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For questions regarding the acquisition of Power Thyristors, Diodes, Modules send an email request to:
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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.
Photo of Phase Control Thyristor SCR: