Sanghvi Electronics

General Overview

• Device type: Thyristor (SCR) module

• Configuration: Dual thyristors in a half‑bridge layout

• Package: Standard industrial A2 housing

• Mounting: Pressure contact to heatsink

• Typical use: controlled rectifiers, AC motor drives, soft starters, and power supplies.

Electrical Ratings

Parameter Approx. Value Average forward current (IT(AV)) ~540 A at case (~85–89 °C) Repetitive peak off‑state voltage (VDRM/VRRM) ~1400 V class Surge on-state current (ITSM) Typically several kA (short pulse rating) Peak on‑state voltage (VTM) ~1.5 V (at 25 °C) Threshold forward voltage ~0.85 n‑state slope resistance (rT) ~0.37 mΩ Turn‑off time (tq) ~160 µs Junction temp. (Tj max) max) ~130 °C Thermal resistance Rth (j‑c) ~0.055 °C/W

Device Structure

• Dual SCRs (two thyristors) in half‑bridge configuration

• Each SCR includes gate and cathode terminals.

• Pressure‑contact design improves thermal cycling and mechanical reliability

• The A2 package houses both devices with robust electrical isolation for safe heatsink mounting.

Mechanical & Thermal Features

• Baseplate: Electrically insulated copper (for heat spread)

• Package size: A2 (~60 mm × 124 mm)

• Heatsink interface: Pressure plate for good thermal contact

• Weight & form factor: Designed for heavy‑duty industrial assemblies

Functional Behavior Thyristor Operation

• This module conducts when both the anode and gate are forward biased (SCR turn‑on).

• It turns off only when current falls below holding current (typical line‑zero crossing), unlike IGBTs, which can be turned off actively.

Suitable For

• Controlled AC → DC rectification

• Phase angle control

• Soft starting of motors

• DC motor drives with phase control

• Industrial welding power supplies

Typical Applications

• Controlled rectifiers for DC link generation

• AC motor speed controllers / soft starters

• Power supply units with phase control

• Traction systems or industrial power converters

• Battery charging systems where controlled DC is required

Advantages & Considerations Pros

• High current handling (hundreds of amps)

• Rugged for industrial operation

• Good thermal cycling resistance

• Pressure contacts allow multiple modules on the same heatsink without extra insulation

Overview — MT3‑595‑16‑A2 Thyristor Power Module

Designation: MT3‑595‑16‑A2
Device type: Dual thyristor (SCR) power module
Package: Industrial A2 housing (pressure contact standard)
Application areas: Rectifier bridges, AC/DC motor drives, soft starters, welding machines, frequency converters, and power supplies.

Note: Despite some sources referring to this part as an “IGBT module," the MT3 prefix and manufacturer documentation clearly indicate this as a thyristor (SCR) module, not a discrete IGBT power switch.

Key Electrical Ratings

ParameterValueConditionsAverage on‑state current (IT(AV)) 595 ACase temp ~88° Repetitive peak off‑state voltage (VDRM/VRRM): 1600 V Design class "16" Peak on‑state voltage (VTM): ~1.50 V At 25°C, high current Peak on‑state current (ITM): ~1570 A short pulse condition On‑state slope resistance (rT) ~0.36 mΩ Junction max turn‑off time (tq) ~160 μs Typical maximum junction temperature (Tjmax) ~135 °C Thermal resistance (Rth jc) jc) ~0.055 °C/W Junction‑to‑case Package base dimensions 60 × 124 mm A2 package

Module Construction & Features

Topology: Dual SCR devices in half‑bridge configuration — two thyristors connected in a single module.

Package type:

• A2 pressure‑contact industrial housing

• Electrically isolated copper baseplate for heat distribution

• Allows mounting of multiple modules on one heatsink without extra insulation

Thermal & mechanical design:

• High thermal and electrical cycling durability

• Good conductor to heatsinks for effective cooling

• Large screw terminals for reliable high‑current connections

Typical Applications

This module is suited for power control and rectification duties in industrial setups, such as:

• 50 Hz/60 Hz controlled rectifiers

• AC motor speed control and soft starters

• DC motor and traction drives

• Power supplies and welding equipment

• Industrial frequency converters and inverters