1N5370B/TR8

Overview

The Microchip Technology 1N5370B/TR8 is a silicon 5-watt Zener diode from the JEDEC registered 1N5333-5388B series. It provides voltage regulation at a nominal Zener voltage of 56 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 maximum dynamic impedance of 35 Ohms at a test current of 20 mA. It utilizes an axial-lead T-18 package and includes a tape-and-reel option designated by the 'TR8' suffix.

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 changes versus current
• Moisture classification is Level 1 per IPC/JEDEC J-STD-020B requiring no dry pack

Applications

• Voltage regulation in power supply circuits
• Overvoltage protection for sensitive electronic components
• Reference voltage generation in measurement systems

Procurement Notes

Verify that the ordering suffix TR8 corresponds to the specific tape-and-reel packaging configuration required for automated assembly processes. Confirm that the component meets all necessary environmental compliance standards applicable to your manufacturing region. Ensure that the supplier documentation explicitly references the Microsemi Scottsdale Division datasheet for accurate electrical specifications and mechanical dimensions.

Selection Notes

Select this component when a 56 V regulation point is required with moderate precision. The 5-watt power dissipation rating allows operation at high DC currents provided adequate heat sinking is implemented. Consider the thermal resistance characteristics and derating curves if the ambient temperature exceeds standard conditions or if surface mount alternatives are not suitable for the mechanical constraints.

Part Context

This part belongs to the 1N5333B through 1N5388B series of silicon Zener diodes manufactured by Microsemi's Scottsdale Division. The series offers a wide selection of voltages from 3.3 V to 200 V. The 'B' suffix specifically denotes a standard voltage tolerance of plus or minus 5%. These devices are plastic encapsulated with void-free transfer molded thermosetting epoxy bodies meeting UL94V-0 flammability ratings.

Replacement Considerations

Surface mount equivalents are available as SMBJ5370B or SMBG5370B. Verify pinout compatibility and thermal performance when substituting axial leads with surface mount packages.