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S4S3RP
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Product Detailed Parameters
- Description：SCR 400V 800MA COMPAK
- Series：-
- Mfr：Littelfuse Inc.
- Package：Tape & Reel (TR)
- Voltage - Off State：400 V
- Voltage - Gate Trigger (Vgt) (Max)：800 mV
- Current - Gate Trigger (Igt) (Max)：500 µA
- Current - Hold (Ih) (Max)：8 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：16A, 20A
- SCR Type：Sensitive Gate
- Operating Temperature：-40°C ~ 110°C
- Mounting Type：Surface Mount
- Package / Case：DO-214AA, SMB (3 Leads), Compak
- Supplier Device Package：Compak
- Voltage - On State (Vtm) (Max)：1.7 V
- Current - On State (It (AV)) (Max)：510 mA
- Current - On State (It (RMS)) (Max)：800 mA
- Current - Off State (Max)：1 µA
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Overview
The Littelfuse S4S3RP is a surface-mount silicon-controlled rectifier (SCR) from the SxSx series, designed for sensing applications. It features a DO-214AA (SMB) package with three leads. Key electrical parameters include a rated repetitive off-state voltage (VDRM) of 400 V and an on-state RMS current (It RMS) of 800 mA. The device has a maximum gate trigger voltage (Vgt) of 800 mV and a gate trigger current (Igt) of 500 µA. Forward voltage (Vf) is 1.7 V, while off-state leakage current is 1 µA. The holding current (Ih) maximum is 8 mA. Non-repetitive on-state current ratings are listed as 16 A and 20 A. Operating temperature range spans from -40°C to +110°C.
Feature Summary
- Sensitive gate structure enabling low-power triggering via minimal gate current requirements.
- Surface-mount construction in a compact DO-214AA footprint for automated PCB assembly.
- High thermal stability supporting operation across extended industrial temperature ranges.
Applications
- AC power switching circuits requiring sensitive gate control.
- Lighting control systems utilizing surface-mount technology.
- Motor speed control applications in consumer electronics.
Procurement Notes
Verify component authenticity by cross-referencing the manufacturer part number S4S3RP with official Littelfuse documentation. Confirm package type matches DO-214AA specifications. Ensure compliance with RoHS directives if required by the design. Check datasheet revisions for any updates to electrical characteristics or handling instructions before integration into production.
Selection Notes
Select this SCR when a 400 V blocking voltage and 800 mA continuous current capacity are required in a small surface-mount form factor. The sensitive gate characteristic makes it suitable for low-power drive circuits. Compare non-repetitive surge current ratings against expected load transients. Ensure the operating environment remains within the specified -40°C to +110°C temperature range for reliable performance.
Part Context
This component belongs to the Littelfuse SxSx series of thyristors, specifically categorized under SCRs. It serves as a solid-state switch for controlling AC loads. The device is distinct from higher-current variants like the S4010 series due to its lower RMS current rating and smaller SMB package, targeting space-constrained sensing and switching applications.
Replacement Considerations
Direct substitutes may include other 400 V, 800 mA SCRs in DO-214AA packages from Littelfuse or compatible manufacturers. Verify pinout compatibility and electrical parameters such as gate trigger current and holding current. Ensure thermal dissipation capabilities match the original design constraints.
