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Product Detailed Parameters
- Description：DIODE CUR REG 350MW SOT23-3
- Series：SST500
- Mfr：Linear Integrated Systems, Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Voltage - Anode - Cathode (Vak)(Max)：-
- Regulator Current (Max)：-
- Voltage - Limiting (Max)：1.5V
- Power - Max：350mW
- Applications：-
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23-3
- Grade：-
- Qualification：-
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Overview
The SST508 is a current regulating diode from the SST500 series by Linear Integrated Systems, housed in an SOT-23 3L package. It provides a nominal forward current of 2.4 mA with a range of 1.9 mA to 2.9 mA. Key electrical parameters include a dynamic impedance of 0.4 mΩ and a knee impedance of 0.08 mΩ at 6V. The limiting voltage is 3.1 V maximum. It operates within a peak operating voltage of 50 V and supports continuous power dissipation of 350 mW. Junction temperature ranges from -55°C to 150°C.
Feature Summary
- Maintains constant current across a wide voltage range without external biasing circuits
- Replaces legacy Siliconix/Vishay SST502 series components for improved consistency
- Requires no gate-source voltage (VGS = 0V) for operation
Applications
- Test instrumentation current sources
- Medical device circuitry
- Sensor biasing applications
Procurement Notes
Verify the specific ordering suffix against official documentation to confirm RoHS compliance status and any custom part designations. Ensure the component matches the standard SST508 specification rather than a variant with altered electrical characteristics. Cross-reference datasheet revision A5 for accurate parameter limits during procurement validation.
Selection Notes
Select the SST508 when a stable 2.4 mA current source is required in space-constrained designs utilizing the SOT-23 footprint. Consider the 350 mW power dissipation limit and thermal derating requirements above 25°C. Verify that the application voltage remains below the 50 V peak operating limit to ensure reliable performance.
Part Context
The SST508 belongs to the SST500 series of current regulating diodes designed as direct replacements for older SST502 models. This series offers a broad spectrum of current options ranging from 0.192 mA to 5.6 mA. The SST508 specifically targets applications needing approximately 2.4 mA regulation in a compact surface-mount format.
Replacement Considerations
This component serves as a functional replacement for the Vishay/Siliconix SST502 series. Verify pin compatibility and electrical tolerance alignment before substitution. No other specific substitute part numbers are documented in the provided materials.
