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S4008NS2TP
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Product Detailed Parameters
- Description：SCR 400V 8A TO263
- Series：-
- Mfr：Littelfuse Inc.
- Package：Tube
- Voltage - Off State：400 V
- Voltage - Gate Trigger (Vgt) (Max)：800 mV
- Current - Gate Trigger (Igt) (Max)：200 µA
- Current - Hold (Ih) (Max)：6 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：83A, 100A
- SCR Type：Sensitive Gate
- Operating Temperature：-40°C ~ 110°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)：1.6 V
- Current - On State (It (AV)) (Max)：5.1 A
- Current - On State (It (RMS)) (Max)：8:00 AM
- Current - Off State (Max)：5 µA
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Overview
The S4008NS2TP is a silicon-controlled rectifier (SCR) manufactured by Littelfuse, designed for surface-mount applications in the D2PAK-3 (TO-263-3) package. It features a rated repetitive off-state voltage (VDRM) of 400 V and an on-state RMS current (It RMS) of 8 A. The device exhibits a forward voltage drop of 1.6 V and a maximum holding current of 6 mA. Gate triggering requirements are specified at 800 mV and 200 uA. It operates within a temperature range of -40°C to +110°C and supports non-repetitive on-state currents up to 100 A.
Feature Summary
- Sensitive gate structure enabling reliable triggering with low gate current and voltage requirements.
- Surface-mount construction utilizing the D2PAK-3 package for automated PCB assembly.
- High surge current capability supporting transient load conditions.
Applications
- AC power control circuits
- Lighting dimmer systems
- Solid-state relays
Procurement Notes
Verify component authenticity through authorized Littelfuse distributors or certified suppliers. Confirm the specific datasheet revision matches design requirements. Ensure storage conditions adhere to moisture sensitivity level guidelines to prevent package damage prior to soldering. Cross-reference pinouts with the official mechanical drawing to avoid installation errors during assembly.
Selection Notes
Select this component when a 400 V blocking voltage and 8 A continuous current rating are required in a surface-mount form factor. Compare against through-hole alternatives like the S4008LS2 if higher thermal dissipation or different mounting styles are necessary. Evaluate gate drive capabilities to ensure they meet the 200 uA trigger threshold. Consider the D2PAK-3 thermal performance for the specific PCB layout constraints.
Part Context
This part belongs to the Sxx08xSx series of sensitive gate SCRs from Littelfuse. It shares electrical characteristics with other variants in the family but differs in packaging and voltage ratings. The S4008NS2TP specifically addresses the need for compact, high-current SCR solutions in modern electronics manufacturing compared to older through-hole designs.
Replacement Considerations
The S4008VS2TP serves as a parameter-equivalent alternative, offering identical electrical specifications but housed in a TO-251-3 through-hole package. Designers must account for the mechanical footprint differences and mounting style changes when substituting these components.
