1N4737AP/TR8

Overview

The Microchip Technology 1N4737AP/TR8 is a single silicon Zener diode housed in the DO-41 axial through-hole package. It provides a nominal Zener voltage of 7.5 V with a tight tolerance of ±5%. The device is rated for a maximum power dissipation of 1 W and operates within an extended temperature range from -65°C to +175°C. Supplied in a reel packaging format, this component is designed for robust voltage regulation applications requiring high reliability and stable performance under varying thermal conditions.

Feature Summary

• Provides precise voltage regulation with a narrow ±5% tolerance band
• Engineered for high-reliability operation across extreme temperature environments
• Features a sharp reverse characteristic for effective noise suppression

Applications

• Precision voltage reference circuits
• Over-voltage protection stages
• Clamping applications in signal processing

Procurement Notes

Verify the specific suffix AP/TR8 against official Microchip documentation to confirm the exact tolerance and packaging configuration. Ensure compatibility with existing board layouts regarding the DO-41 footprint. Cross-reference the manufacturer's latest datasheet for any updates on material compliance or environmental certifications before finalizing procurement orders.

Selection Notes

Select this component when a stable 7.5 V reference is required with strict tolerance limits. The wide operating temperature range makes it suitable for industrial or automotive environments where standard commercial-grade parts may fail. Consider the 1 W power rating to ensure adequate thermal headroom during continuous operation.

Part Context

This part belongs to the widely recognized 1N47 series of axial lead Zener diodes. The 'A' designation typically indicates a tighter voltage tolerance compared to standard variants. The 'TR8' suffix denotes the reel packaging method used for automated surface mount or through-hole assembly processes, distinguishing it from bulk or tape-and-reel alternatives.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4737A devices meeting the same electrical specifications. Verify that alternative sources offer the same ±5% tolerance and DO-41 package dimensions to maintain mechanical fit.