The SEMIKRON SKKH172/14E is a high-power thyristor/diode module combining a SCR and rectifier diode in a single SEMIPACK housing, rated for 172A average on-state current and a 1400V repetitive peak off-state voltage (VDRM/VRRM). This topology is purpose-built for half-controlled rectifier bridges and phase-control converter circuits where a thyristor and freewheeling diode must share a common heatsink interface. The module features an isolated baseplate for simplified thermal management and meets the dimensional standards common across SEMIKRON's SKKH series, facilitating direct replacement in existing designs.

The SKKH172/14E is widely deployed in industrial AC/DC converters, DC motor drives, soft starters, and field excitation systems found in steel mills, paper mills, mining equipment, and crane drives. Its robust current and voltage ratings make it equally suitable for battery charging systems, electrochemical process rectifiers, and UPS infrastructure. Engineers specifying replacements in legacy variable-speed drives or upgrading aging rectifier cabinets will find the SKKH172/14E a reliable, form-fit-function substitute where the SEMIPACK2 footprint is already established.

Quick Reference: SKKH172/14E

Key Features of the SKKH172/14E:

• 172A average on-state current (IT(AV)) suitable for high-current phase-control rectifier stages
• 1400V VDRM/VRRM repetitive peak voltage rating for operation on 690VAC line voltages with adequate safety margin
• Thyristor + freewheeling diode co-packaged in SEMIPACK2 housing, reducing component count and heatsink real estate
• Electrically isolated copper baseplate enabling direct mounting to system heatsink without additional insulation hardware
• Low thermal resistance junction-to-case (Rthjc) supporting high power density converter designs
• Gate trigger current and latching current specifications optimized for compatibility with standard SCR firing boards used in industrial drive controllers

With a factory lead time of 27 weeks for new production, the SKKH172/14E presents a genuine procurement challenge for maintenance teams facing unplanned equipment failures or time-sensitive MRO requirements. SEMIKRON's SKKH series has historically been subject to extended allocation windows, particularly at higher voltage classes. ATI Accurate Technology actively maintains distributor relationships and monitors open-market inventory channels to help customers bridge these gaps. Whether you need a single emergency replacement or are building safety stock for a critical production line, ATI can assess current availability and provide realistic delivery options before a 27-week factory queue becomes your only path.

ATI Accurate Technology is headquartered in Palmetto, Florida, and ships same-day on orders placed before 5PM EST. We stock hard-to-find, long-lead-time, and obsolete power semiconductors including SEMIKRON thyristor and diode modules. Call us at 239-734-7566, email sales@igbts.us, or request a quote online. Volume pricing is available — let us know your quantity and application requirements.