1N5357BE3/TR12

Overview

The Microchip Technology 1N5357BE3/TR12 is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333B-1N5388B series. It provides voltage regulation at a nominal Zener voltage of 20 V with a ±5% tolerance, indicated by the 'B' suffix. The device operates within a temperature range of -65°C to +150°C and features a T-18 axial lead package. Electrical characteristics include a test current of 65 mA, a maximum dynamic impedance of 3.0 Ohms, and a maximum reverse leakage current of 0.5 µA. The component is RoHS compliant (e3) and available in tape and reel packaging.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole applications
• Withstands high surge stresses and exhibits minimal voltage change versus current
• Moisture classification is Level 1 per IPC/JEDEC J-STD-020B without requiring dry pack

Applications

• Voltage reference circuits
• Overvoltage protection systems
• Power supply regulation

Procurement Notes

Verify the specific part number against official Microchip documentation to confirm the B suffix denotes ±5% tolerance and the e3 suffix indicates RoHS compliance. Confirm the TR12 suffix corresponds to the specified tape and reel packaging format. Ensure the component meets the required thermal dissipation conditions for the intended application environment.

Selection Notes

Select this component when a 20 V regulation point with tight ±5% tolerance is required. The 5 W power rating allows for high steady-state currents if adequate heat sinking is provided. Consider the T-18 package dimensions and axial lead configuration for PCB layout compatibility. Verify that the operating temperature range of -65°C to +150°C aligns with system requirements.

Part Context

This device belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes manufactured by Microsemi (now Microchip Technology). The series offers a wide selection of voltages from 3.3 V to 200 V. The 'B' suffix specifically identifies devices with standard ±5% voltage tolerances, distinguishing them from A (±10%), C (±2%), or D (±1%) variants.

Replacement Considerations

Equivalent parts within the same series include 1N5357A (±10% tolerance), 1N5357C (±2% tolerance), and 1N5357D (±1% tolerance). Surface mount equivalents are available as SMBJ5357B or SMBG5357B.