1N5258B

Single Zener Diodes Overview

The ON Semiconductor 1N5258B is a single silicon Zener diode housed in a DO-35 glass axial-lead package. It provides a nominal Zener voltage of 36 V with a tolerance of ±5%. The device dissipates up to 500 mW at 25°C, derating by 4.0 mW/°C above this temperature. Electrical characteristics include a maximum reverse leakage current of 100 nA at 27 V and a Zener impedance of 70 Ω at a test current of 3.4 mA. The component operates within a junction temperature range of -65°C to +200°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation using a single unidirectional Zener junction.
• Utilizes a hermetically sealed glass DO-35 case for environmental protection.
• Features a color band marking to clearly identify the cathode end.

Single Zener Diodes Applications

• Voltage reference circuits
• Overvoltage protection stages
• General-purpose voltage regulation

Single Zener Diodes Procurement Notes

Verify the specific part number against the official ON Semiconductor database, as Fairchild legacy parts may have updated naming conventions due to system integration. Confirm RoHS compliance status and check for any active product change notices (PCN) or obsolescence announcements before finalizing procurement plans.

Single Zener Diodes Selection Notes

Select this component when a precise 36 V reference is required in a through-hole design. Ensure the application circuit limits power dissipation to 500 mW and accounts for thermal derating above 50°C. Verify that the 70 Ω impedance meets the noise and stability requirements of the target load.

Single Zener Diodes Part Context

This device belongs to the 1N5221B through 1N5263B series of 0.5 W Zener diodes. The 'B' suffix indicates a standard 5% voltage tolerance. The series covers a wide voltage range from 2.4 V to 53.2 V, all sharing the same DO-35 glass package form factor and general electrical construction standards.

Single Zener Diodes Replacement Considerations

Cross-reference with other manufacturers offering the 1N5258B designation. Verify that substitute components match the 36 V nominal voltage, 5% tolerance, 500 mW power rating, and DO-35 package dimensions to ensure mechanical and electrical compatibility.

Single Zener Diodes FAQ

How is the cathode polarity identified on the 1N5258B?

The cathode end is denoted by a colored band printed on the glass surface of the DO-35 package.

What is the thermal derating specification for this diode?

Power dissipation must be derated by 4.0 mW per degree Celsius for temperatures exceeding 50°C.