1N4737ATR

Overview

The onsemi 1N4737ATR is a single-channel general-purpose Zener diode with a nominal voltage of 7.5 V and a maximum power dissipation of 1 W. It features a 5% tolerance, operates within a temperature range of -65°C to 200°C, and utilizes a DO-41 through-hole package. Key electrical parameters include a test current of 34 mA, a maximum Zener impedance of 4 Ω, and a maximum reverse leakage current of 10 μA.

Feature Summary

• Provides stable voltage regulation via a sharp reverse characteristic suitable for general applications.
• Features metallurgically bonded construction within a hermetically sealed glass package for high reliability.
• Supports axial lead mounting in the DO-41 case form factor.

Applications

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

Procurement Notes

Verify that the specific ordering suffix matches the required packaging configuration, as variations exist between tape-and-reel and bulk formats. Confirm compliance requirements such as RoHS status against the latest datasheet specifications. Ensure the manufacturer designation aligns with onsemi standards rather than legacy designations from acquired entities like Fairchild Semiconductor.

Selection Notes

Select this component when a 7.5 V regulation point is required with a 1 W power rating. The DO-41 package is appropriate for through-hole assembly processes. Consider the 5% tolerance and 4 Ω impedance characteristics for circuit stability requirements. Verify thermal management capabilities given the 200°C maximum operating temperature limit.

Part Context

This device belongs to the 1N47 series of one-watt Zener diodes. The series covers a wide voltage range from 3.3 V to 100 V. The 1N4737A variant specifically targets the 7.5 V segment. The A suffix typically denotes a 5% tolerance band. The ATR suffix indicates a specific reel-based packaging format.

Replacement Considerations

Cross-reference with other manufacturers' 1N4737A equivalents. Verify pinout compatibility and package dimensions (DO-41) for direct substitution. Check if alternative suppliers offer identical electrical characteristics and thermal ratings.