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S4X8ES
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Product Detailed Parameters
- Description：SCR 400V 800MA 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)：8A, 10A
- 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)：510 mA
- Current - On State (It (RMS)) (Max)：800 mA
- Current - Off State (Max)：3 µA
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Overview
The Littelfuse S4X8ES is a bidirectional triac designed for AC power control applications. It features an RMS on-state current of 800 mA and a rated repetitive peak off-state voltage of 400 V. The device operates within a junction temperature range of -65°C to +125°C and utilizes a TO-92-3 through-hole package. Key electrical characteristics include a maximum holding current of 25 mA, a gate trigger voltage of 2.5 V, and a gate trigger current ranging from 25 mA to 50 mA. The on-state voltage is specified at 1.6 V, with non-repetitive peak on-state currents available in 8.3 A and 10 A variants.
Feature Summary
- Bidirectional switching capability for alternating current circuits
- Robust thermal performance across extended industrial temperature ranges
- Standardized through-hole mounting for reliable PCB integration
Applications
- AC motor speed control systems
- Solid-state relay output stages
- Lighting dimmer circuits
Procurement Notes
Verify the specific suffix variant against the manufacturer datasheet to confirm exact current ratings. Confirm RoHS compliance status directly with the supplier. Ensure the TO-92-3 package dimensions match the target PCB footprint requirements before finalizing procurement orders.
Selection Notes
Select this component when a low-current bidirectional switch is required for AC loads. Verify that the 400 V blocking voltage meets the peak line voltage requirements. Ensure the gate drive circuit can supply the necessary trigger current to activate the device reliably under all operating conditions.
Part Context
This part belongs to the QxX8Ex series of triacs manufactured by Littelfuse. These components are engineered for general-purpose AC power switching tasks. The series offers standardized electrical parameters suitable for consumer electronics and light industrial control applications requiring compact thyristor solutions.
Replacement Considerations
Consult official Littelfuse substitution guides for verified equivalents. Generic replacements may differ in gate sensitivity or thermal resistance. Validate pinout compatibility and voltage ratings before implementing any alternative components in existing designs.
