The SEMIKRON SKD31/04 is a three-phase diode bridge rectifier module rated for 31A average output current and a 400V repetitive peak reverse voltage (VRRM). Housed in SEMIKRON's industry-standard SKD package, this module integrates six diodes in a B6 bridge configuration, providing full-wave three-phase rectification in a compact, heatsink-mountable footprint. It is engineered for continuous duty in demanding industrial environments and conforms to the electrical and mechanical standards expected of SEMIKRON's established SKD product family.

The SKD31/04 sees wide deployment across industrial and commercial power electronics applications including AC motor drive front-ends, servo drive DC bus rectification, uninterruptible power supplies (UPS), welding power sources, soft-starter input stages, and general-purpose three-phase power supply units. Its moderate current rating and 400V blocking voltage make it a practical solution for equipment operating from standard 208–240V three-phase mains, and it is commonly specified in legacy drive platforms still operating in manufacturing, material handling, and process control environments.

Quick Reference: SKD31/04

Key Features of the SKD31/04:

• B6 three-phase full-wave bridge configuration with six integrated diodes in a single module package
• 31A average rectified output current (I_D(AV)) with 400V repetitive peak reverse voltage (V_RRM)
• Low forward voltage drop for reduced conduction losses and improved system efficiency
• Isolated copper base plate for direct heatsink mounting, enabling efficient thermal management in chassis-mounted assemblies
• Compact SKD package with industry-standard bolt-down footprint compatible with widely available heatsink profiles
• Meets IEC and UL-recognized standards applicable to power semiconductor modules for industrial equipment

The SKD31/04 carries a factory lead time of approximately 31 weeks for new production orders, reflecting the extended manufacturing schedules common across the power semiconductor industry for established catalog modules. For OEMs managing scheduled production runs and for MRO buyers facing equipment downtime, waiting on factory lead times is rarely an option. ATI Accurate Technology actively sources SEMIKRON SKD-series modules through authorized and vetted supply channels, offering procurement teams an alternative path to securing inventory ahead of or outside standard factory timelines. Contact ATI early to confirm current stock position and reserve units against your project schedule.

ATI Accurate Technology is a power semiconductor distributor located in Palmetto, Florida, specializing in IGBTs, thyristors, diodes, and rectifier modules — including long-lead-time and hard-to-find parts like the SKD31/04. Orders placed before 5PM EST ship same day. Volume pricing is available for qualified orders. Reach our technical sales team directly at 239-734-7566 or sales@igbts.us for availability, pricing, and lead-time information.