The SEMIKRON SKD33/18 is a three-phase diode bridge rectifier module rated for 33A average output current and a peak repetitive reverse voltage (VRRM) of 1800V. Housed in SEMIKRON's standard SKD package, this module integrates six diodes in a fully isolated baseplate configuration, enabling straightforward mounting to a heatsink without additional electrical isolation hardware. Its high voltage rating makes it well suited for demanding AC-to-DC front-end rectification stages where line transients, high-impedance supplies, or elevated mains voltages require extended blocking capability.

The SKD33/18 sees broad deployment across industrial variable-speed drives, servo amplifiers, UPS front-end stages, welding equipment, and DC bus charging circuits. Its 1800V voltage class provides the necessary margin for 690V three-phase mains applications, offshore and marine power systems, and industrial machinery operating on non-standard or fluctuating utility feeds. The thermally efficient baseplate design simplifies integration into existing drive cabinets and rectifier assemblies where engineers need a drop-in, high-reliability solution with a proven field history.

Quick Reference: SKD33/18

Key Features of the SKD33/18:

• 1800V V_RRM rating provides substantial voltage margin for 690V three-phase mains and high-impedance industrial supplies
• 33A average rectified output current (I_DAV) supports mid-range drive and power converter front-end stages
• Fully isolated copper baseplate allows direct heatsink mounting without supplemental isolation pads, reducing thermal resistance and assembly complexity
• Six-pulse, full-wave bridge topology minimizes DC ripple and reduces downstream filtering requirements
• SEMIKRON SKD standard package footprint ensures dimensional compatibility with existing PCB layouts and drive assemblies designed around this platform
• Characterized for low forward voltage drop, optimizing efficiency and reducing heat dissipation in continuous-duty rectifier applications

The SKD33/18 carries a factory lead time of approximately 29 weeks for new production, a reality that procurement teams in industrial MRO, OEM manufacturing, and systems integration regularly face with high-voltage SEMIKRON modules. ATI Accurate Technology maintains active sourcing channels for long-lead-time and allocated SEMIKRON product, giving engineers and buyers an alternative to extended factory queues. Whether you need a single unit for an emergency repair or a scheduled production quantity, contacting ATI early in your planning cycle is the most reliable way to secure allocation and protect your uptime.

ATI Accurate Technology is headquartered in Palmetto, Florida, and stocks power semiconductors for same-day shipping on orders placed before 5PM EST. We specialize in IGBTs, thyristors, diodes, and rectifier modules—including obsolete, allocated, and long-lead-time parts. Call us at 239-734-7566 or email sales@igbts.us for real-time availability, volume pricing, and lead-time updates on the SKD33/18 and the full SEMIKRON SKD series.