The Vishay VSKT91/14 is a dual SCR (silicon controlled rectifier) thyristor module engineered for demanding industrial power conversion applications. Rated at 91A average on-state current and 1400V repetitive peak reverse voltage (VRRM), this module delivers robust controllable rectification in a compact, isolated base package. Its press-fit or screw-mount construction simplifies integration into existing heatsink assemblies, and Vishay's proven thyristor technology ensures consistent gate sensitivity and thermal performance across the full operating range.

The VSKT91/14 is widely deployed in AC motor soft-starters, variable speed drives, industrial DC power supplies, battery chargers, electrochemical processing equipment, and crane and hoist control systems. Its 1400V voltage class provides the necessary margin for 690VAC line-connected applications where transient overvoltages are common. Industries including steel, mining, marine propulsion, oil and gas, and heavy manufacturing rely on this class of SCR module to manage high-power loads with precise phase-angle control and reliable commutation.

Quick Reference: VSKT91/14

Key Features of the VSKT91/14:

• 91A average on-state current (IT(AV)) with high surge current (ITSM) capability for demanding load profiles
• 1400V repetitive peak reverse voltage (VRRM) providing reliable margin on 690VAC three-phase systems
• Dual SCR configuration in a single isolated-base module simplifies circuit layout for anti-parallel or bridge topologies
• Low thermal resistance (Rth(j-c)) enabling efficient heat transfer to external heatsinks and maximizing continuous power handling
• High gate sensitivity with well-defined trigger characteristics for consistent phase-angle firing across full current range
• Isolated copper base plate rated for full dielectric isolation, reducing system complexity and eliminating the need for additional insulating hardware

With a current factory lead time of 99 weeks from Vishay, procurement teams sourcing the VSKT91/14 for new builds, field replacements, or MRO inventory face a significant supply challenge. Legacy industrial equipment — soft-starters, DC drives, and rectifier panels — often cannot wait nearly two years for new production. ATI specializes in exactly this scenario: maintaining verified stock of long-lead-time, hard-to-find, and discontinued SCR modules so that production lines stay running and capital equipment is not prematurely retired due to a single unavailable component.

ATI Accurate Technology is a power semiconductor distributor based in Palmetto, Florida, stocking IGBTs, thyristors, diodes, and rectifier modules for immediate fulfillment. Orders placed before 5PM EST ship same day. Whether you need a single replacement unit or volume pricing for a larger procurement, our team is ready to help. Call us at 239-734-7566 or email sales@igbts.us for a fast quote on the VSKT91/14 and related SCR modules.