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S4040RQ3TP
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Product Detailed Parameters
- Description：SCR 400V 40A TO220AB-R
- Series：-
- Mfr：Littelfuse Inc.
- Package：Tube
- 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-220AB-R
- 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 S4040RQ3TP is a Silicon Controlled Rectifier (SCR) from the Teccor Sxx40x series, rated for 400 V repetitive off-state voltage and 40 A RMS on-state current. It features a gate trigger voltage of 1.5 V and a gate trigger current of 40 mA, with a maximum holding current of 60 mA. The device operates within a temperature range of -40°C to +125°C and utilizes an SMTO-263-2 surface-mount package. Key electrical parameters include a forward voltage of 1.8 V, off-state leakage current of 10 µA at VDRM, and a non-repetitive peak on-state current of 520 A.
Feature Summary
- Surface-mount construction in an SMTO-263-2 package for automated PCB assembly
- High thermal stability supporting operation up to +125°C junction temperature
- Integrated gate control with defined trigger voltage and current thresholds
Applications
- AC power switching circuits
- Phase control applications
- Industrial motor speed controls
Procurement Notes
Verify the specific suffix 'TP' against the official Littelfuse datasheet to confirm tape-and-reel packaging or variant specifications. Ensure the ordered component matches the S4040RQ3 electrical ratings and SMTO-263-2 footprint. Cross-reference manufacturer documentation for any RoHS compliance details or pinout configurations before finalizing procurement.
Selection Notes
Select this SCR for designs requiring high current handling in a compact surface-mount form factor. The 400V rating suits general-purpose AC line applications. Verify that the gate drive circuit can supply the required 40 mA trigger current. Consider the thermal management requirements associated with the SMTO-263-2 package for continuous 40 A operation.
Part Context
This component belongs to the Littelfuse Teccor Sxx40x family of SCRs. These devices are designed for robust performance in power control applications. The S4040RQ3 variant specifically offers through-hole or surface-mount options depending on the suffix, providing flexibility for different board layout constraints while maintaining consistent electrical characteristics across the series.
Replacement Considerations
The S4040NRP is a comparable surface-mount SCR from the same series with identical electrical ratings. Verify pin compatibility and package dimensions when substituting. Other S4040 variants may differ in packaging style but share core performance metrics.
