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S402ES
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Product Detailed Parameters
- Description：SCR 400V 1.5A TO92
- Series：-
- Mfr：Littelfuse Inc.
- Package：Bulk
- Voltage - Off State：400 V
- Voltage - Gate Trigger (Vgt) (Max)：800 mV
- Current - Gate Trigger (Igt) (Max)：200 µA
- Current - Hold (Ih) (Max)：5 mA
- Current - Non Rep. Surge 50, 60Hz (Itsm)：12.5A, 15A
- SCR Type：Sensitive Gate
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-226-3, TO-92-3 (TO-226AA)
- Supplier Device Package：TO-92
- Voltage - On State (Vtm) (Max)：1.7 V
- Current - On State (It (AV)) (Max)：950 mA
- Current - On State (It (RMS)) (Max)：1.5 A
- Current - Off State (Max)：5 µA
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Overview
The Littelfuse S402ES is a silicon-controlled rectifier (SCR) from the Sx02xS series, designed for through-hole mounting in TO-92 packages. It features a rated repetitive off-state voltage of 400 V and an RMS on-state current of 1.5 A. The device has a maximum gate trigger voltage of 800 mV and a gate trigger current of 200 uA. Operating temperatures range from -40 C to +125 C. Key electrical parameters include a holding current of 5 mA, forward voltage of 1.7 V, and a non-repetitive peak on-state current of 15 A.
Feature Summary
- Sensitive gate triggering capability with low gate current requirements
- Robust thermal performance suitable for high-temperature environments up to 125 C
- Standardized TO-92 through-hole package for easy circuit board integration
Applications
- Lighting control circuits
- Motor speed control systems
- Temperature regulation devices
Procurement Notes
Verify the specific suffix against official Littelfuse documentation to ensure exact electrical characteristics match design requirements. Confirm RoHS compliance status and REACH SVHC details via the manufacturer's datasheet before finalizing component selection for production.
Selection Notes
Select this SCR based on its 400 V blocking voltage and 1.5 A continuous current rating. Ensure the gate drive circuit can supply at least 200 uA at 800 mV for reliable turn-on. Consider the TO-92 package size and thermal dissipation capabilities when designing the PCB layout for optimal heat management.
Part Context
The S402ES belongs to the Sx02xS family of sensitive gate SCRs manufactured by Littelfuse. This series is engineered for applications requiring precise gate control and reliable switching in power electronics. The component serves as a fundamental building block for controlling AC loads in various industrial and consumer electronic systems.
Replacement Considerations
Consult Littelfuse official substitution guides for compatible alternatives. Verify pinout compatibility and electrical parameter equivalence before replacing the S402ES with other SCRs in existing designs.
