Semikron – SKKT 250/12E – Thyristor SCR Power Module – 1200V 250A – Reclaimed Part

Semikron — SKKT 250/12E Thyristor SCR Power Module 1200 V • 250 A I_T(AV) • Dual Thyristor-Thyristor Configuration • AlN Isolated Baseplate • SEMIPACK 3

What it is

The Semikron SKKT 250/12E is an industrial-grade 1200 V, 250 A dual thyristor/SCR power module housed in the heavy-duty SEMIPACK 3 package. Its thyristor-thyristor configuration is designed for high-current controlled rectification and phase-control applications requiring high surge capability, reliable triggering and efficient thermal transfer.

The SKKT 250/12E features an electrically isolated metal baseplate with aluminum-nitride ceramic for excellent heat transfer. With an 8000 A surge-current rating and 405 kA²s I²t capability, it is well suited to industrial motor controls, AC motor starters, temperature controls, professional lighting systems, controlled rectifiers and other high-power conversion equipment.

At-a-Glance

• Voltage Rating: 1200 V V_DRM / V_RRM
• Average On-State Current: 250 A I_T(AV) @ T_case = 85°C
• Surge Current: 8000 A I_TSM
• I²t Rating: 405 kA²s
• Topology: Dual thyristor-thyristor SCR configuration
• Thermal Resistance: 0.15°C/W junction-to-case
• Baseplate: Aluminum-nitride ceramic isolated metal baseplate
• Package: SEMIPACK 3 • 115 × 50 × 52 mm
• Applications: Motor controls; motor starters; rectifiers; heater and temperature controls; professional lighting controls

Features

• 1200 V blocking capability — designed for demanding industrial rectifier and phase-control circuits.
• High surge strength — I_TSM rated at 8000 A for severe short-duration overload conditions.
• High I²t capability — 405 kA²s rating provides substantial transient-current withstand capability.
• Low conduction losses — approximately 0.93 V threshold voltage with 0.45 mΩ on-state slope resistance.
• Industrial thermal performance — 0.15°C/W junction-to-case thermal resistance.
• Aluminum-nitride ceramic isolation — provides excellent heat transfer while electrically isolating the semiconductor circuit from the heatsink.
• Amplifying-gate thyristor construction — designed for reliable triggering in high-current industrial applications.
• SEMIPACK 3 housing — rugged industrial package designed for high-power heatsink-mounted assemblies.

Technical Specifications

Applications / Replacement Considerations