1N4748A-T50A

Overview

The onsemi 1N4748A-T50A is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 22V with a tolerance of ±5%. The device is rated for a maximum steady-state power dissipation of 1W at an ambient temperature of 25°C, with a derating factor of 6.67 mW/°C above this threshold. It operates within a junction and storage temperature range of -65°C to +200°C. The component utilizes a DO-41 axial leaded glass package, providing electrical isolation between the case and the circuit.

Feature Summary

• Provides stable voltage regulation at a nominal 22V level with standard manufacturing tolerances.
• Capable of handling high thermal loads with a 1W power dissipation rating and extended temperature endurance up to 200°C.
• Constructed in a hermetically sealed glass axial package for reliable through-hole mounting and environmental protection.

Applications

• General-purpose voltage reference circuits
• Overvoltage protection stages
• Power supply output regulation

Procurement Notes

Verify the specific suffix T50A against the manufacturer's current datasheet to confirm packaging details and availability status. Ensure the ordering part number matches the required axial lead configuration and glass encapsulation type. Cross-reference the 22V specification with system requirements to confirm compatibility with intended load conditions.

Selection Notes

Select this component when a robust 1W axial Zener diode is required for high-temperature environments. The DO-41 glass package offers superior thermal stability compared to plastic alternatives. Confirm that the 22V breakdown voltage aligns with the target regulation point and that the ±5% tolerance meets the circuit's precision requirements.

Part Context

This component belongs to the widely used 1N47xx series of Zener diodes, which are standardized for general voltage regulation tasks. The 1N4748 variant specifically targets the 22V market segment within the 1W power class. The T50A suffix typically denotes a specific tape-and-reel or bulk packaging format distributed by onsemi, distinguishing it from other mechanical variants in the same electrical family.

Replacement Considerations

Equivalent parts include the 1N4748A from other manufacturers such as Fairchild or Central Semiconductor, provided they meet the 22V, 1W, and DO-41 specifications. Verify pinout orientation and thermal derating curves before substitution.