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S4X8ES2
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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)：50 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 S4X8ES2 is a sensitive gate silicon controlled rectifier (SCR) designed for high static dv/dt performance and lower turn-off times. It features an 800 mA RMS on-state current and a 400 V repetitive peak off-state voltage. The device operates within a junction temperature range of -40°C to +125°C. Key electrical parameters include a maximum gate trigger voltage of 800 mV, a gate trigger current of 200 µA, and a maximum forward voltage of 1.7 V. It utilizes a TO-92 package.
Feature Summary
- Sensitive gate design enabling reliable triggering with low gate current
- High static dv/dt capability for robust noise immunity
- Reduced turn-off time (tq) for efficient circuit switching
- Small die planar construction for compact integration
Applications
- Ground Fault Circuit Interrupter (GFCI) circuits
- Gas ignition systems
- AC power control applications requiring sensitive triggering
Procurement Notes
Verify the specific suffix 'ES2' against official Littelfuse documentation to confirm pinout and thermal characteristics. Ensure the procurement source provides valid RoHS compliance certificates. Cross-reference the manufacturer part number with authorized distributor catalogs to avoid counterfeit components. Confirm that the TO-92 bulk packaging meets storage and handling requirements for your assembly line.
Selection Notes
Select this component when low gate drive power is required alongside high dv/dt stability. The sensitive gate characteristic allows for simpler triggering circuits compared to standard SCRs. Consider the 400 V rating for low-voltage AC applications. The TO-92 through-hole package suits prototyping and low-volume production where space constraints are moderate.
Part Context
This device belongs to the SxX8xSx EV series from Littelfuse, which focuses on enhanced thyristor performance. The series emphasizes improved switching speeds and noise tolerance. The S4X8ES2 variant specifically targets applications needing precise gate control without compromising blocking capabilities. It represents an evolution in small-signal SCR technology for consumer and industrial electronics.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing circuit designs before considering alternative manufacturers. Check if other SxX8xSx variants meet the specific dv/dt and tq requirements of the application.
