S-822T

Overview

The S-822T is a surface-mount current regulating diode (CRD) from Semitec USA Corp, designed to maintain constant current flow despite voltage fluctuations. It operates within a wide voltage range of less than 1V to 50V and delivers a typical pinch-off current of 8.2mA at 10V. The component features a maximum rated power of 500mW and supports an operating temperature range from -40°C to 150°C. Packaged in a compact 2-SMD flat lead configuration, it eliminates the need for multiple components in constant current circuits.

Feature Summary

• Maintains constant current regardless of applied voltage or load resistance changes
• Single-component solution for creating constant current circuits
• Operates reliably across a wide temperature range up to 150°C

Applications

• Constant current source for LED brightness stabilization
• Battery charge and discharge circuits
• Current source for proximity sensors and other sensors
• Stabilized power supply circuits

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging type. The 'T' suffix indicates SMD reel taping with a standard quantity of 3,000 pieces. Ensure compatibility with RoHS3 standards if required by your manufacturing process. Cross-reference the manufacturer part number with distributor listings to confirm availability and lead times before finalizing procurement plans.

Selection Notes

Select the S-822T when a stable 8.2mA current is required within a 50V limit. Consider using a series resistor to compensate for current reduction due to self-heating if precise stability is critical. Verify that the application voltage remains below the 50V maximum rating. Compare performance against the E-series axial variants if through-hole mounting is preferred.

Part Context

The S-822T belongs to Semitec's S Series of Current Regulating Diodes, which are surface-mount devices offering 500mW power dissipation. This series complements the E Series axial parts, providing a compact alternative for modern PCB designs. The S-822T specifically targets applications requiring higher current regulation than lower-numbered models like the S-562T.

Replacement Considerations

The datasheet lists the E-822 as the direct axial equivalent. No other specific substitute part numbers are documented in the provided material.