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S4X8BS2RP
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Product Detailed Parameters
- Description：SCR 400V 800MA SOT89
- 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)：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 (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-243AA
- Supplier Device Package：SOT-89
- 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 S4X8BS2RP is a silicon-controlled rectifier (SCR) designed for sensing applications. It features an RMS on-state current of 0.8 A and a rated repetitive peak off-state voltage of 600 V. The device operates within a temperature range of -40°C to +125°C and utilizes a SOT-89-3 surface-mount package. Key electrical characteristics include a gate trigger voltage of 800 mV, a gate trigger current of 1 µA, and a maximum holding current of 5 mA. The component exhibits a forward voltage drop of 1.7 V and a non-repetitive peak on-state current capability of 10 A.
Feature Summary
- Designed for low-power SCR sensing applications
- Surface-mount construction in a compact SOT-89-3 package
- High thermal stability with operation up to +125°C
Applications
- Solid-state relay control circuits
- Industrial motor control systems
- Power supply triggering mechanisms
Procurement Notes
Verify the specific suffix 'S2' against official Littelfuse documentation to confirm the exact tape-and-reel packaging configuration and quantity per reel. Ensure that the ordering part number matches the required lead time and production cycle constraints provided by the manufacturer for this specific variant.
Selection Notes
Select the S4X8BS2RP when a 600 V blocking voltage and 0.8 A RMS current rating are required in a small SOT-89-3 footprint. Consider the low gate trigger current of 1 µA for sensitive drive circuits. Verify that the thermal management capabilities of the SOT-89-3 package meet the junction temperature requirements for the intended operating environment.
Part Context
This component belongs to the Sxx8x series of silicon-controlled rectifiers from Littelfuse. This family typically includes variants with different voltage ratings and packages, such as the S4X8BSRP in DO-214AB and the S8X8TS2RP in SOT-223. The S4X8BS2RP specifically offers a balance of moderate voltage handling and current capacity in a standard three-terminal SMD form factor.
Replacement Considerations
Potential substitutes within the same Littelfuse family include the S4X8BSRP (DO-214AB package) or the S6X8BS2RP (SOT-89-3 package, 600V). Cross-reference pinouts and thermal resistance values before substitution.
