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SK055R
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Product Detailed Parameters
- Description：SCR 1KV 55A TO220
- Series：-
- Mfr：Littelfuse Inc.
- Package：Bulk
- Voltage - Off State：1 kV
- Voltage - Gate Trigger (Vgt) (Max)：1.5 V
- Current - Gate Trigger (Igt) (Max)：40 mA
- Current - Hold (Ih) (Max)：60 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：550A, 650A
- SCR Type：Standard Recovery
- Operating Temperature：-40°C ~ 125°C
- Grade：-
- Qualification：-
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220 Non-Isolated Tab
- Voltage - On State (Vtm) (Max)：1.8 V
- Current - On State (It (AV)) (Max)：35 A
- Current - On State (It (RMS)) (Max)：55 A
- Current - Off State (Max)：30 µA
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Overview
The Littelfuse SK055R is a Silicon Controlled Rectifier (SCR) designed for high-power switching applications. It features a rated repetitive peak off-state voltage of 1000 V and an RMS on-state current of 55 A. The device utilizes a TO-220AB flange mount package with three terminals, where the case is connected to the anode. Key electrical characteristics include a maximum non-repetitive peak surge current of 350 A and a gate trigger voltage of 1.5 V. The component operates within a junction temperature range of -40°C to +125°C and complies with RoHS standards.
Feature Summary
- High-voltage blocking capability suitable for demanding power circuits
- Robust thermal management via flange mount construction
- Standardized TO-220AB plastic package for easy integration
Applications
- Industrial motor control systems
- AC power regulation circuits
- General purpose rectification in high-current environments
Procurement Notes
Verify the specific manufacturer source, as Teccor Electronics and Littelfuse both utilize this part number format. Confirm that the required suffix indicates the correct voltage rating and packaging compliance. Ensure the supplier provides official datasheets matching the 1000V/55A specifications to avoid receiving lower-rated variants such as the 50V version.
Selection Notes
Select this component when a 1000V blocking voltage and 55A continuous current capacity are required. The TO-220AB flange mount style necessitates direct mounting to a heatsink or chassis for adequate thermal dissipation. Verify that the gate trigger requirements align with the driving circuit capabilities before finalizing the design.
Part Context
This SCR belongs to the Sxx55x series, characterized by a 55A current rating. Variants exist with different voltage ratings, such as 50V or 1000V. The SK055R specifically denotes the 1000V version within this family, distinguishing it from lower-voltage counterparts like the S0555R59 which shares similar physical dimensions but different electrical limits.
Replacement Considerations
Direct substitutes include the SK055R56 and SK055RTP56 from Littelfuse, which share identical electrical ratings and package type. Cross-manufacturer equivalents from Teccor Electronics may also be compatible if pinout and thermal resistance parameters match.
