The SEMIKRON SKD31/12 is a three-phase diode bridge rectifier module configured in a B6 topology, rated for 35A average output current and a 1200V repetitive peak reverse voltage. Housed in SEMIKRON's standard SKD package with isolated baseplate mounting, the module integrates six diodes into a single compact assembly, reducing board space and simplifying thermal management. It is engineered for continuous duty in industrial rectification stages where high blocking voltage, low forward drop, and long-term reliability under thermal cycling are critical design requirements.

The SKD31/12 is well suited for front-end rectification in AC variable frequency drives, servo drive DC bus supplies, industrial UPS systems, battery chargers, welding rectifiers, and DC power supply units operating from three-phase mains. Its 1200V voltage class provides adequate margin for 690VAC line inputs and transient overvoltage events common in industrial grid environments. The isolated baseplate allows direct mounting to a heatsink without additional isolation pads in many configurations, simplifying mechanical integration in both new designs and field replacement scenarios.

Quick Reference: SKD31/12

Key Features of the SKD31/12:

• B6 three-phase full-wave bridge topology with six integrated diodes in a single module package
• 1200V V_RRM blocking voltage provides robust margin for 480VAC and 690VAC three-phase input applications
• 35A average output current rating supports continuous duty rectification in industrial drive and power supply front ends
• Isolated copper baseplate enables direct heatsink mounting with controlled, predictable thermal resistance (R_th(c-s))
• SEMIKRON SKD package platform offering dimensional interchangeability with other SKD-series modules for simplified field replacement
• Low forward voltage drop diodes minimize conduction losses and reduce heatsink size requirements in thermally constrained enclosures

The SKD31/12 carries a factory lead time of approximately 35 weeks for new production orders, placing it firmly in the long-lead-time category that routinely disrupts MRO and capital project schedules. Procurement teams supporting aging drive platforms or legacy power supply designs frequently encounter extended waits or outright obsolescence risk with SEMIKRON SKD-series modules. ATI maintains an active sourcing network specifically targeting these supply chain gaps, enabling us to locate genuine OEM inventory that bypasses standard factory queues. Early engagement with our team is strongly recommended to avoid unplanned downtime.

ATI Accurate Technology is a power semiconductor distributor based in Palmetto, Florida, stocking IGBTs, diodes, thyristors, and rectifier modules including long-lead-time and hard-to-find parts like the SKD31/12. Orders placed before 5PM EST ship same day when stock is available. Contact our team for real-time availability, volume pricing, and sourcing support: 239-734-7566 | sales@igbts.us.