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S4040RQ2
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Product Detailed Parameters
- Description：SCR 400V 40A TO220
- Series：-
- Mfr：Littelfuse Inc.
- Package：Bulk
- Voltage - Off State：400 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)：430A, 520A
- 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)：25 A
- Current - On State (It (RMS)) (Max)：40 A
- Current - Off State (Max)：10 µA
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Overview
The Littelfuse S4040RQ2 is a Silicon Controlled Rectifier (SCR) from the Teccor Sxx40x series, designed for surface-mount applications. It features a rated repetitive off-state voltage of 400 V and an RMS on-state current of 40 A. The device utilizes an SMTO-263-2 package to facilitate automated assembly. Key electrical characteristics include a maximum gate trigger current of 40 mA and a forward voltage drop of 1.8 V at rated current. It operates within a temperature range of -40°C to +125°C and offers a non-repetitive peak on-state current capability of 520 A.
Feature Summary
- Surface-mount construction in an SMTO-263-2 package for efficient PCB integration
- High current handling with 40 A RMS on-state rating
- Robust surge tolerance with 520 A non-repetitive peak current capacity
Applications
- Solid-state relays requiring high current switching
- Motor control circuits for AC load management
- Industrial power regulation systems
Procurement Notes
Verify the specific suffix 'RQ2' against the manufacturer's official datasheet to confirm exact binning or tape-and-reel specifications. Ensure the ordering part number matches the required packaging format and electrical tolerances defined in the public documentation before finalizing procurement orders.
Selection Notes
Select this component when a 40 A SCR is required in a surface-mount form factor. The 400 V blocking voltage suits general industrial AC applications. Verify that the gate drive circuit can supply the specified 40 mA trigger current and that the thermal design accommodates the 1.8 V forward voltage drop at full load.
Part Context
This device belongs to the Littelfuse Teccor Sxx40x family of thyristors. These components are engineered for high-power density designs where space constraints necessitate surface-mount technology over traditional through-hole packages while maintaining robust electrical performance standards.
Replacement Considerations
Consult the official Littelfuse replacement guide for direct equivalents. Verify pinout compatibility and thermal resistance values if substituting with other manufacturers' 40 A SCRs in the SMTO-263-2 package.
