1N5239B/TR

Single Zener Diodes Overview

The Microchip Technology 1N5239B/TR is a unidirectional voltage regulator diode housed in a DO-35 glass axial-lead package. It features a nominal Zener voltage of 9.1 V with a maximum dynamic impedance of 10 Ohms at a test current of 20 mA. The device supports a power dissipation of 500 mW and maintains a reverse leakage current of 3 µA at 7 V. It operates within a temperature range of -65°C to +175°C and exhibits a voltage temperature coefficient of 0.068 %/°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole integration
• Includes internal bonds for enhanced reliability options

Single Zener Diodes Applications

• Voltage reference circuits requiring precise regulation
• Protection against overvoltage conditions in electronic systems
• Clamping applications in signal processing paths

Single Zener Diodes Procurement Notes

Verify the specific manufacturer source, as this component designation appears across multiple semiconductor suppliers including Microsemi and onsemi. Confirm that the TR suffix corresponds to tape and reel packaging standards per EIA-296. Ensure the B suffix indicates the required 5% voltage tolerance level for your design specifications before finalizing orders.

Single Zener Diodes Selection Notes

Select this component when a 9.1 V reference is needed in a standard DO-35 package. The B suffix ensures a tighter 5% tolerance compared to the A suffix. Consider the thermal resistance characteristics and derating curves if operating near the maximum power dissipation limit or in high ambient temperatures.

Single Zener Diodes Part Context

This part belongs to the 1N5221 through 1N5281B series of 0.5 W Zener Voltage Regulators. The series offers a wide selection of voltages from 2.4 to 200 V in standard 5% or 10% tolerances. These devices are JEDEC registered and available in hermetically sealed glass axial-lead packages suitable for various commercial and industrial applications.

Single Zener Diodes Replacement Considerations

1N5239B

Single Zener Diodes FAQ

What does the 'TR' suffix indicate for this part number?

The 'TR' suffix indicates that the device is supplied in tape and reel packaging, conforming to EIA-296 standards.

How is polarity indicated on the 1N5239B?

Polarity is indicated by a band on the cathode end of the glass body. For Zener regulation, the banded end must be positive with respect to the opposite end.