What are the primary applications of the LD431850?

The LD431850 is engineered for industrial motor soft starters, controlled rectifiers for processes like electroplating, welding power supplies, and the front-end rectification stage of large Variable Frequency Drives (VFDs).

What is the benefit of the compression-bonded design?

The compression-bonded, solder-free construction eliminates solder fatigue caused by thermal cycling. This results in higher power cycling capability and a longer, more predictable service life compared to conventional soldered modules.

Does the LD431850 require external insulation for mounting?

No. It includes an integrated Aluminum Nitride (AlN) isolator that provides 2500Vrms of isolation between the terminals and the baseplate, allowing it to be mounted directly to a grounded heatsink.

How does the surge current rating affect system design?

With a peak surge current (Itsm) of 17,000 Amperes, the module provides a significant safety margin to withstand massive current spikes from motor startups or line-side faults without failure.

LD431850 Infineon 1800V 1850A Phase Control Thyristor

LD431850 Thyristor Module In-stock / Infineon: 1800V 1850A for power control. 90-day warranty, ideal for AC controllers. Global fast shipping. Get quote.

· Categories: Thyristor Module

· Manufacturer: POWEREX

· Price: US$ 76 In-Stock Offer

· Date Code: Please Verify on Quote

. Available Qty: 318

90-Day Warranty

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Content last revised on June 30, 2026

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