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S4040NQ2RP
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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)：6 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：430A, 520A
- SCR Type：Standard Recovery
- Operating Temperature：-40°C ~ 125°C (TJ)
- 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 S4040NQ2RP is a 40 Amp, 400 Volt Silicon Controlled Rectifier (SCR) from the Teccor S4040xQx series. It features a low turn-off time of 12 microseconds and utilizes a TO-263 (D2-Pak) surface-mount package. The device supports an RMS on-state current of 40 A at 100°C case temperature and handles peak non-repetitive surge currents up to 520 A. Gate trigger current ranges from 30 mA to 45 mA, with a maximum gate trigger voltage of 1.5 V. It operates within a junction temperature range of -40°C to +125°C.
Feature Summary
- Fast turn-off time characteristics suitable for high-frequency switching circuits exceeding 1000 pulses per second.
- High dv/dt and di/dt capabilities designed for power inverters and switching regulators.
- Glass-passivated junctions providing robust blocking voltage performance.
Applications
- Multi-phase voltage regulator circuits
- DC/AC inverters
- Higher frequency pulsing power supplies
Procurement Notes
Verify the specific suffix 'Q2' to confirm the 12 microsecond turn-off time requirement. Confirm the 'N' designation indicates the TO-263 surface-mount package rather than the through-hole alternative. Ensure the 'RP' packing option matches the required embossed carrier reel specifications for automated assembly processes.
Selection Notes
Select this component when fast recovery is critical for inverter or high-frequency pulse applications. The TO-263 package facilitates surface-mount integration. Verify that the 40 A RMS rating and 400 V blocking voltage align with the circuit's worst-case thermal and electrical stress conditions during continuous operation.
Part Context
This part belongs to the S4040xQx family of low turn-off time SCRs manufactured by Littelfuse under the Teccor brand. The series provides variants with different turn-off speeds (Q, Q2, Q3) and packages (TO-220AB, TO-263). The S4040NQ2RP specifically combines the 12 µs speed class with the D2-Pak form factor.
Replacement Considerations
S4040NQ3RP offers a faster 5 µs turn-off time. S4040RQ2RP provides identical electrical characteristics but uses a TO-220AB through-hole package instead of the surface-mount configuration.
