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Thyristors - SCRs - Modules

Image Part Number Description / PDF Quantity Rfq
C784DP

C784DP

Powerex, Inc.

THYRISTOR DISC 4000V 1650A TBK

0
VS-VSKU105/12

VS-VSKU105/12

Vishay General Semiconductor – Diodes Division

MODULE THYRISTOR 105A ADD-A-PAK

0
TD700N22KOFHPSA1

TD700N22KOFHPSA1

IR (Infineon Technologies)

THYR / DIODE MODULE DK

0
F1827CAH1600

F1827CAH1600

Sensata Technologies – Crydom

MODULE SCR/DIODE 25A 600VAC

0
T1500N18TOFVTXPSA1

T1500N18TOFVTXPSA1

IR (Infineon Technologies)

T1500N18 - PHASE CONTROL THYRIST

4
B642-2T

B642-2T

Sensata Technologies – Crydom

MOD DIODE SCR 42.5A 240V .250"QC

0
ND471825

ND471825

Powerex, Inc.

SCR MOD ISO DUAL 1800V 250A

0
B614F-2

B614F-2

Sensata Technologies – Crydom

MOD DIODE SCR 42.5A 380V ISO QC

0
B542-2T

B542-2T

Sensata Technologies – Crydom

MOD DIODE SCR 25A 240VAC .250"QC

0
VS-VSKU56/14

VS-VSKU56/14

Vishay General Semiconductor – Diodes Division

MODULE THYRISTOR 60A ADD-A-PAK

0
PA430607

PA430607

Powerex, Inc.

SCR MOD AC-SW ISO 600V 700A

0
TT330N16AOFHPSA1

TT330N16AOFHPSA1

IR (Infineon Technologies)

PHASE CONTROL THYRISTOR MODULE

0
T470N12TOFXPSA1

T470N12TOFXPSA1

IR (Infineon Technologies)

SCR MODULE 1600V 800A DO200AA

0
T390N14TOFXPSA1

T390N14TOFXPSA1

IR (Infineon Technologies)

SCR MODULE 1600V 600A DO200AA

0
TTB6C135N16LOFHOSA1

TTB6C135N16LOFHOSA1

IR (Infineon Technologies)

TTB6C135 - BRIDGE RECTIFIER & AC

39
T7H8146504DN

T7H8146504DN

Powerex, Inc.

SCR PHASE CTRL MOD 1400V 650A

0
F1827HD400

F1827HD400

Sensata Technologies – Crydom

MODULE SCR/DIODE 25A 120VAC

0
MS0690J-DL1TE

MS0690J-DL1TE

Wickmann / Littelfuse

THYRISTOR MODULE 600V 90A SOT227

0
MCA700-14IO1W

MCA700-14IO1W

Wickmann / Littelfuse

SCR THRYRISTOR CA 1400V WC-500

0
F1892HD1200

F1892HD1200

Sensata Technologies – Crydom

MODULE SCR/DIODE 90A 480VAC

0

Thyristors - SCRs - Modules

1. Overview

Silicon Controlled Rectifiers (SCRs) are four-layer (PNPN) semiconductor devices that act as controlled switches for high-power applications. As key members of the thyristor family, SCR modules enable precise control of electrical power in industrial systems. Their ability to handle high voltages (>6000V) and currents (>5000A) makes them indispensable in power electronics, particularly for AC/DC conversion, motor speed control, and load management systems.

2. Main Types and Functional Classification

TypeFunctional CharacteristicsApplication Examples
Single-phase SCR ModuleCompact design with integrated snubber circuitrySingle-phase motor controllers, heating systems
Three-phase SCR Module6-pack configuration for 3-phase power controlVariable frequency drives, industrial furnaces
Reverse-Conducting SCR (RC-SCR)Integrated freewheeling diode for inductive loadsTraction converters, welding equipment
Light-Triggered SCR (LTSCR)Optical gate activation for high-noise environmentsHigh-voltage DC transmission systems
SCR Power Stack ModuleMulti-chip parallel configuration for extreme currentsElectrolysis plants, large motor soft starters

3. Structure and Composition

Typical SCR module construction includes:

  • Die-level PNPN junction semiconductor (silicon base)
  • DBC (Direct Bonded Copper) substrate for thermal management
  • Gate control circuit with trigger transformer isolation
  • Press-pack or soldered housing with IP54 protection rating
  • Dielectric cooling interface ( silicone pad or phase-change material)

Advanced modules integrate temperature sensors and MOV-based overvoltage protection.

4. Key Technical Specifications

ParameterTypical RangeImportance
Rated Repetitive Peak Voltage (VRRM)600V - 6500VDetermines maximum operating voltage
Rated Average On-state Current (ITAV)25A - 3000ADefines continuous load capacity
Gate Trigger Current (IGT)50 A - 50mAAffects control circuit design
dv/dt Capability10-500 V/ sIndicates immunity to voltage spikes
Thermal Resistance (Rth)0.01-0.5 K/WImpacts cooling requirements

5. Application Fields

Primary industries utilizing SCR modules:

  • Industrial: Motor drives (cranes, mills), welding machines, heating controllers
  • Energy: HVDC transmission, static VAR compensators, battery charging systems
  • Transportation: Traction converters for trains, EV charging stations
  • Utilities: Smart grid power flow controllers, uninterruptible power supplies

Case Study: 3 MW wind turbine converter using 1700V/1200A SCR modules achieves 98.5% conversion efficiency.

6. Leading Manufacturers and Products

ManufacturerRepresentative ProductKey Features
ABB5SNA 2400K1703001700V/2400A, press-pack design, 50kA short-circuit rating
ON SemiconductorCM400HA-34H1600V/400A, hockey puck package, <2V forward voltage
InfineonB25801-A10471200V/800A, integrated heat sink, RoHS compliant
Mitsubishi ElectricPM100CL1A-1201200V/100A, low inductance package, 150 C operating temp

7. Selection Guidelines

Key considerations:

  1. Derate ITAV by 20-30% for safety margin
  2. Select VRRM 1.5 system peak voltage
  3. Match gate drive circuit to IGT specifications
  4. Consider thermal interface material (TIM) performance
  5. Verify short-circuit withstand capability

Recommend consulting manufacturer's SOA (Safe Operating Area) curves for critical applications.

Industry Trends

Emerging developments:

  • SiC-based SCR prototypes enabling 3 higher switching frequencies
  • Smart power modules with embedded current/voltage sensors
  • Double-sided cooling packages reducing thermal resistance by 40%
  • Grid-forming SCR systems for renewable energy integration
  • Lead-free packaging compliant with REACH regulations
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