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S8055M
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Product Detailed Parameters
- Description：SCR 800V 55A TO218
- Series：-
- Mfr：Littelfuse Inc.
- Package：Bulk
- Voltage - Off State：800 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
- Grade：-
- Qualification：-
- Mounting Type：Through Hole
- Package / Case：TO-218-3, TO-218AC
- Supplier Device Package：TO-218 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)：20 µA
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Overview
The Littelfuse S8055M is a Silicon Controlled Rectifier (SCR) from the Teccor Sxx55x series, designed for high-power switching applications. It features an 800 V rated repetitive off-state voltage and supports a continuous on-state RMS current of 55 A. The device utilizes a TO-218AC flange mount package with the case connected to the anode, facilitating efficient thermal dissipation. Key electrical characteristics include a maximum holding current of 60 mA, a gate trigger voltage of 1.5 V, and a non-repetitive peak on-state current capability of 650 A. It operates within a temperature range of -40 °C to +125 °C.
Feature Summary
- Flange-mount construction with anode-connected case for direct heatsink attachment
- Glass-passivated junctions for long-term parameter stability and reliability
- High surge current handling capability for robust circuit protection
Applications
- Industrial motor control systems
- High-power AC phase control circuits
- Solid-state relays and contactors
Procurement Notes
Verify the specific suffix 'M' against the manufacturer's official datasheet to confirm the exact pinout and mechanical dimensions, as variations exist within the S8055 family. Ensure the ordering documentation explicitly references the TO-218AC package style. Cross-reference the part number with Littelfuse's current production status to confirm availability before finalizing procurement plans.
Selection Notes
Select this component when a high-current SCR requires direct mounting to a chassis or heatsink for thermal management. The TO-218AC package is suitable for applications where board space is less constrained than in surface-mount designs. Verify that the system's thermal resistance allows the device to remain within the specified operating temperature limits under full load conditions.
Part Context
The S8055M belongs to the Teccor Sxx55x series of SCRs manufactured by Littelfuse. This series is characterized by its ability to handle significant power levels in compact packages. The 'S8055' designation indicates the 55 A current rating and 800 V voltage class, while the 'M' suffix typically denotes the specific lead frame and package configuration used for flange mounting.
Replacement Considerations
Compatible substitutes include other 55 A, 800 V SCRs in the TO-218AC package, such as the S8055CT or S8055BTP, provided the pinout and thermal requirements match. Always verify the replacement's dv/dt rating and gate sensitivity against the original design specifications.
