1N4737A-TR

Overview

The Vishay 1N4737A-TR is a silicon planar power Zener diode designed for voltage stabilization and clipping circuits. It features a nominal Zener voltage of 7.5 V with a standard tolerance of ±5 %. The device operates at a test current of 34 mA, dissipates up to 1.3 W of power, and maintains a maximum dynamic impedance of 4 Ω. Packaged in the DO-41 (DO-204AL) axial leaded format, it supports junction temperatures up to 175 °C.

Feature Summary

• Utilizes silicon planar technology for robust voltage regulation
• Provides high power dissipation capabilities for demanding applications
• Features a standard ±5 % Zener voltage tolerance

Applications

• Voltage stabilization
• Clipping circuits

Procurement Notes

Verify that the ordering code suffix matches the required packaging configuration, such as TR for taped units per reel or TAP for ammopack formats. Confirm compliance requirements against the material categorization definitions provided by Vishay. Ensure the specific part number aligns with the intended quantity and reel specifications before finalizing procurement orders.

Selection Notes

Select this component when a 7.5 V reference point is required within a through-hole design. The 1.3 W power rating accommodates moderate current loads while maintaining thermal stability. Verify that the circuit environment remains within the specified -65 °C to +175 °C storage and operating temperature ranges to ensure reliable long-term performance.

Part Context

This component belongs to the 1N4728A through 1N4761A series of Zener diodes manufactured by Vishay Semiconductors. The series covers a broad range of nominal voltages from 3.3 V to 75 V, all sharing the same DO-41 package and fundamental electrical characteristics. The 1N4737A specifically targets the 7.5 V segment of this standardized lineup.

Replacement Considerations

Cross-reference with other manufacturers offering DO-41 packaged Zener diodes rated at 7.5 V and 1.3 W. Verify that alternative parts meet the identical ±5 % voltage tolerance and dynamic impedance specifications to maintain circuit integrity without redesign.

FAQ

What is the maximum surge current for the 1N4737A?

The maximum surge current (IZM) for the 1N4737A is 121 mA.

How does the forward voltage behave under load?

The maximum forward voltage is 1.2 V when tested at a forward current of 200 mA.