The Semikron Danfoss SKKT 250/16 E is a high-performance dual thyristor (SCR) module designed for demanding industrial power control and rectification systems. Built on the proven SEMIPACK® 3 platform, it integrates two series-connected thyristors in a compact, electrically isolated housing.
With a current rating of 250A and voltage capability of 1600V, this module delivers reliable switching performance for applications such as motor drives, soft starters, AC controllers, and industrial rectifiers. Its robust construction ensures excellent thermal management, high surge tolerance, and long-term reliability in harsh operating environments.
Key Features
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Dual thyristor (SCR) configuration – efficient AC power control
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250A current rating – suitable for medium-to-heavy industrial loads
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1600V blocking voltage – reliable for high-voltage applications
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SEMIPACK® 3 housing – industry-standard, robust module design
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High surge current capability (~9 kA) – withstands transient overloads
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Amplifying gate thyristor design – stable and reliable triggering
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Al₂O₃/AlN ceramic baseplate – excellent thermal conductivity and insulation
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Hard-soldered internal joints – enhanced mechanical and thermal reliability
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UL recognized component – suitable for industrial systems
Electrical
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Average On-State Current (ITAV): 250 A
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RMS Current (ITRMS): ~420 A
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Repetitive Peak Voltage (VDRM/VRRM): 1600 V
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Surge Current (ITSM): ~9000 A
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On-State Voltage (VT): ~1.4–1.6 V
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Gate Trigger Current (IGT): ≤ 200 mA
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Gate Trigger Voltage (VGT): ~3 V
Mechanical
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Housing: SEMIPACK® 3 module
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Mounting: Screw-mounted baseplate
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Pins/Connections: 7-pin configuration
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Baseplate: Electrically isolated ceramic (Al₂O₃ / AlN)
Thermal & Environmental
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Operating Temperature: up to ~130°C
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Thermal Resistance (Junction–Case): ~0.14 °C/W
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Cooling: External heatsink required
