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S4040NQ3RP
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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 (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 S4040NQ3RP is a silicon-controlled rectifier (SCR) from the Teccor S4040xQx series, designed for fast turn-off applications. It features a 40 A RMS on-state current and a 400 V repetitive off-state voltage rating. The device utilizes a TO-263 (D2-Pak) surface-mount package with an embossed carrier reel packing option. Key electrical characteristics include a maximum gate trigger current of 65 mA and a peak non-repetitive surge current of 520 A at 60 Hz. The component operates within a junction temperature range of -40°C to +125°C and offers a typical turn-off time of 5 µs.
Feature Summary
- Fast turn-off time suitable for high-frequency switching circuits exceeding 1000 pulses per second
- High dv/dt and di/dt capabilities for robust performance in power inverters and switching regulators
- Glass-passivated junctions providing durability and compliance with RoHS standards
Applications
- Multi-phase voltage regulator circuits
- DC/AC inverters
- Higher frequency pulsing power supplies
Procurement Notes
Verify the specific ordering suffix 'RP' corresponds to the required packaging format, as it indicates an embossed carrier reel configuration. Confirm that the TO-263 package style aligns with the target printed circuit board layout and soldering profile requirements before finalizing procurement orders.
Selection Notes
Select this component when a low turn-off time is critical for commutation in high-frequency environments. Ensure the design accommodates the specified gate trigger current limits and provides adequate heat sinking to maintain case temperatures within the allowable derating curves for continuous operation.
Part Context
This part belongs to the S4040xQx family of 40 Amp Low Tq SCRs manufactured by Littelfuse under the Teccor brand. The series distinguishes itself through optimized turn-off times compared to standard thyristors, making it distinct from slower variants within the broader Littelfuse SCR portfolio.
Replacement Considerations
Compatible substitutes within the same series include S4040RQ3TP (TO-220 package) or S4040NQ2RP (different turn-off time). Verify pinout compatibility and thermal resistance differences when replacing components in existing designs.
FAQ
What is the maximum turn-off time for the S4040NQ3RP?
The maximum turn-off time (tq) for the S4040NQ3RP is 5 µs.
Does the S4040NQ3RP support lead-free reflow soldering?
Yes, the device is compatible with lead-free reflow soldering processes and meets RoHS compliance standards.
What is the peak non-repetitive surge current rating at 60 Hz?
The peak non-repetitive surge current (ITSM) is rated at 520 A for a single half-cycle at 60 Hz with an initial junction temperature of 25°C.
