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LD421250
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Product Detailed Parameters
- Description：SCR MOD ISO DUAL 1200V 500A
- Series：-
- Mfr：Powerex Inc.
- Package：Bulk
- Structure：Series Connection - SCR/Diode
- Number of SCRs, Diodes：1 SCR, 1 Diode
- Voltage - Off State：1.2 kV
- Current - On State (It (AV)) (Max)：500 A
- Current - On State (It (RMS)) (Max)：785 A
- Current - Non Rep. Surge 50, 60Hz (Itsm)：16300A, 17000A
- Operating Temperature：-40°C ~ 130°C (TJ)
- Mounting Type：Chassis Mount
- Package / Case：POW-R-BLOK™ Module
- Voltage - Gate Trigger (Vgt) (Max)：3 V
- Current - Gate Trigger (Igt) (Max)：200 mA
- Current - Hold (Ih) (Max)：-
- Grade：-
- Qualification：-
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Overview
The LD421250 is a dual SCR/diode isolated module from the POW-R-BLOK series, manufactured by Powerex. It supports currents up to 500 Amperes and voltages up to 1600 Volts. The device features an electrically isolated heatsink design with an aluminum nitride isolator and compression bonded elements on a metal baseplate. This construction provides low thermal impedance for improved current capability and eliminates the need for additional insulation or clamping components during installation.
Feature Summary
- Electrically isolated heatsinking for safe mounting on common heatsinks
- Aluminum nitride isolator ensures dielectric strength between terminals and base
- Compression bonded elements provide robust mechanical stability
- UL recognized certification simplifies compliance verification
Applications
- Bridge circuits requiring phase control
- AC and DC motor drives
- Battery supply systems
- Industrial power supplies
- Large IGBT circuit front ends
Procurement Notes
Verify the specific voltage and current ratings against the official datasheet before integration. Confirm that the application environment matches the module's thermal and electrical specifications. Ensure proper mounting techniques are used to maintain the integrity of the aluminum nitride isolator and compression bonds.
Selection Notes
Select this component for applications needing high current capacity in a compact, isolated package. The dual configuration suits bridge topologies. Evaluate thermal management requirements carefully due to the high current handling capability. Verify compatibility with existing heatsink designs given the metal baseplate structure.
Part Context
This module belongs to the POW-R-BLOK family, which includes similar parts like the LD421843. These modules are designed for phase control and isolated packaging. The series is known for reducing engineering time through easy installation without additional insulation components.
Replacement Considerations
Check for direct substitutes within the POW-R-BLOK series such as the LD421843 if higher voltage ratings are needed. Ensure any replacement maintains the same isolation characteristics and current capabilities.
