1N5263B

Single Zener Diodes Overview

The SMC Diode Solutions 1N5263B is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 56 V with a tolerance of ±5%. The component operates in a through-hole DO-204AH (DO-35) axial leaded package and supports a maximum power dissipation of 500 mW. Key electrical characteristics include a maximum reverse leakage current of 100 nA at 43 V, a Zener impedance of 150 Ohms, and a test current of 2.2 mA. The device is rated for an operating temperature range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation using a sharp reverse characteristic typical of silicon Zener technology.
• Constructed in a glass axial-leaded DO-35 package suitable for through-hole mounting.
• Designed for high stability and low reverse current levels in unidirectional configurations.

Single Zener Diodes Applications

• Voltage reference circuits requiring precise potential levels.
• Overvoltage protection stages in electronic systems.
• General-purpose voltage regulation in power supply designs.

Single Zener Diodes Procurement Notes

Verify the manufacturer origin carefully as the 1N5263B designation is utilized by multiple semiconductor vendors including onsemi, Vishay, and Microsemi. Confirm that the specific lot matches SMC Diode Solutions specifications regarding package dimensions and electrical tolerances. Ensure compliance with RoHS directives if required by the target assembly process. Cross-reference datasheets to confirm exact Zener impedance and leakage parameters before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a 56 V regulation point is required within a 500 mW power budget. The DO-35 through-hole package is appropriate for standard PCB layouts or legacy equipment repairs. Consider the 150 Ohm impedance value for dynamic load requirements and ensure the operating environment stays within the specified -65°C to +175°C junction temperature range.

Single Zener Diodes Part Context

This part belongs to the broader 1N52xx series of 0.5 W Zener diodes, which offers a wide selection of voltage values ranging from 2.4 V to 200 V. The 'B' suffix typically denotes a tighter manufacturing tolerance compared to standard variants. These components are widely used across industrial, consumer, and automotive electronics for basic voltage clamping and reference tasks.

Single Zener Diodes Replacement Considerations

Direct substitutes include the Vishay ZMM5263B-13 (Mini-MELF package) and the onsemi 1N5263B-T50R. Note that package differences may require adapter considerations. Military-grade equivalents such as the Microsemi MX1N5263TR offer hermetic sealing but differ in physical form factor.