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S2055R
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Product Detailed Parameters
- Description：SCR 200V 55A TO220
- Series：-
- Mfr：Littelfuse Inc.
- Package：Bulk
- Voltage - Off State：200 V
- 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
- 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)：10 µA
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Overview
The Littelfuse Inc. S2055R is a standard recovery silicon controlled rectifier (SCR) designed for phase control applications. It features a repetitive peak off-state voltage of 200V and an RMS on-state current rating of 55A. The device utilizes an electrically-isolated package construction, ensuring safety in high-voltage environments. This component belongs to the Low Power SCR series, which supports voltages up to 1200V. It is engineered as an excellent unidirectional switch for precise power regulation tasks.
Feature Summary
- Standard recovery characteristics optimized for reliable phase control switching
- Electrically-isolated package design for enhanced safety and isolation
- High thermal stability with a temperature rating of +150°C
Applications
- Heating system controls
- Motor speed control circuits
- General phase control applications
Procurement Notes
Verify the specific datasheet version from Littelfuse or authorized distributors to confirm RoHS compliance status and exact pinout configuration. Ensure the selected variant matches the required 200V blocking voltage and 55A current ratings for the intended circuit design. Cross-reference the package type to guarantee compatibility with existing PCB footprints and mounting requirements.
Selection Notes
Select this component when a robust, electrically isolated SCR is required for low-power phase control duties. The 200V rating suits lower voltage AC mains applications, while the 55A capacity handles moderate load currents. Consider the standard recovery time for general purpose switching rather than high-frequency operations. Validate thermal management needs given the +150°C junction temperature limit.
Part Context
The S2055R is part of Littelfuse's extensive Low Power SCR portfolio, ranging up to 1200V. This series provides standardized solutions for industrial and consumer electronics requiring reliable thyristor switching. The product line emphasizes durability and consistent performance in heating and motor control sectors, offering various voltage and current combinations within the same isolated package family.
Replacement Considerations
Consult official Littelfuse substitution guides for direct equivalents within the S-series. Verify that any alternative maintains the 200V VDRM and 55A IT(RMS) specifications. Ensure the replacement also offers electrical isolation if system safety depends on it. Generic SCRs may lack the specific package isolation properties.
