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S4040NQRP
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Product Detailed Parameters
- Description：SCR 400V 40A TO263
- Series：-
- Mfr：Littelfuse Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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：Surface Mount
- Package / Case：TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Supplier Device Package：TO-263 (D2PAK)
- 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 S4040NQRP is a surface-mount SCR from the Teccor S4040xQx series, rated for 40 A RMS on-state current and 400 V repetitive off-state voltage. It features a low turn-off time (tq) of 15 µs, enabling operation in high-frequency switching circuits exceeding 1000 PPS. The device utilizes a TO-263 (D2-Pak) package with glass-passivated junctions and matte tin-plated leads. Electrical characteristics include a maximum gate trigger current of 35 mA, a forward voltage of 1.8 V at 80 A, and a peak non-repetitive surge current capability of 520 A at 60 Hz.
Feature Summary
- Fast turn-off time suitable for power inverters and high-frequency pulse circuits
- High dv/dt and di/dt characteristics for robust performance in switching applications
- RoHS compliant construction with glass-passivated junctions
Applications
- Multi-phase voltage regulator circuits
- DC/AC inverters
- Higher frequency pulsing power supplies
Procurement Notes
Verify the specific suffix 'N' confirms the TO-263 surface mount package and 'RP' indicates reel packaging. Confirm RoHS compliance status via the manufacturer's latest documentation. Ensure thermal management design accounts for the specified junction-to-case thermal resistance to maintain safe operating temperatures during continuous conduction.
Selection Notes
Select this component when a fast turn-off thyristor is required for AC or DC switching above 1 kHz. The TO-263 package facilitates automated surface mount assembly. Verify that the application's peak surge currents remain within the 520 A limit at 60 Hz and that the gate drive circuit can supply the necessary trigger current without exceeding the average gate power dissipation rating.
Part Context
This part belongs to the S4040xQx family of 40 Amp Low Tq SCRs manufactured by Littelfuse under the Teccor brand. The series includes variants with different turn-off times and packages, such as the through-hole S4040RQ and the faster-switching S4040NQ3. The S4040NQRP specifically denotes the standard 15 µs turn-off time version in a tape-and-reel format.
Replacement Considerations
Direct substitutes within the same datasheet include S4040NQ2RP (12 µs tq) and S4040NQ3RP (5 µs tq). Cross-package replacements like S4040RQTP require PCB redesign due to the TO-220 through-hole form factor. Verify pinout compatibility and thermal characteristics before substituting.
