The SEMIKRON SKT55/14E is a single thyristor (SCR) module rated at 55A average on-state current and 1400V repetitive peak off-state voltage (V_DRM/V_RRM). Housed in SEMIKRON's industry-standard SKT package with an isolated copper base plate, this module delivers low thermal resistance, excellent surge current capability, and gate trigger characteristics optimized for phase-angle and burst-fire control topologies. It is a direct fit for existing SKT footprint designs and meets the electrical demands of high-voltage industrial converter stages where thermal cycling and long service life are critical requirements.

The SKT55/14E is widely deployed across heavy industrial and process automation equipment. Typical applications include three-phase and single-phase AC motor soft starters, DC motor speed controllers, resistance and induction heating systems, battery chargers, UPS rectifier stages, electrochemical process power supplies, and crane or hoist drives. Its 1400V voltage class provides the headroom required for 690V AC line applications and environments with elevated line transients, making it a reliable choice for demanding utility-connected and industrial converter platforms.

Quick Reference: SKT55/14E

Key Features of the SKT55/14E:

• 1400V V_DRM/V_RRM blocking voltage — suitable for 690V AC three-phase converter designs with transient margin
• 55A average on-state current with high surge current (I_TSM) capability for fault-tolerant converter stages
• Low thermal resistance junction-to-case (R_th(j-c)) enabling efficient heat dissipation through standard heatsink mounting
• Electrically isolated copper base plate for safe integration into multi-module converter assemblies without additional isolation hardware
• Industry-standard SKT package with established mounting footprint — direct form-fit-function replacement for legacy and current-generation converter designs
• Gate trigger parameters characterized for robust firing across wide temperature ranges, reducing mis-trigger risk in variable-environment installations

With a factory lead time of approximately 34 weeks for new production, the SKT55/14E presents a real procurement challenge for maintenance teams managing unplanned equipment failures or project timelines that cannot absorb multi-month delays. ATI Accurate Technology maintains an active sourcing network specifically targeting long-lead-time and hard-to-find SEMIKRON thyristor modules. Whether you need a single replacement unit to restore a critical production line or a buffer stock quantity to protect against future outages, contacting ATI early in the procurement cycle is the most effective way to manage supply risk on this part.

ATI Accurate Technology is headquartered in Palmetto, Florida and stocks power semiconductors for same-day shipping on orders placed before 5PM EST. Call 239-734-7566 or email sales@igbts.us to check current availability on the SKT55/14E. Volume and project pricing is available — our team works directly with maintenance engineers and procurement professionals to find the fastest, most cost-effective sourcing solution for critical power module needs.