1N4737A

Overview

The onsemi 1N4737A is a single-channel general-purpose Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 7.5 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within an extended temperature range from -65°C to +200°C. Packaged in the DO-41 axial through-hole format, it exhibits a maximum Zener impedance of 4 Ω at a test current of 34 mA. The component ensures low leakage current, specified as a maximum of 10 µA.

Feature Summary

• Provides stable voltage regulation using a single unidirectional silicon junction.
• Features hermetically sealed glass construction for environmental durability.
• Supports high thermal stability with operation up to 200°C.
• Utilizes double slug type construction for robust mechanical integrity.

Applications

• Voltage reference circuits requiring precise potential levels.
• Overvoltage protection stages in electronic systems.
• General-purpose clipping and clamping configurations.

Procurement Notes

Verify the specific manufacturer origin, as the 1N4737A designation is utilized by multiple vendors including onsemi, Vishay, and others. Confirm that the received component matches the required electrical specifications, particularly the 7.5 V nominal voltage and 1 W power rating. Ensure the package type corresponds to the DO-41 standard for proper mounting compatibility.

Selection Notes

Select this component when a 7.5 V regulation point is required with high thermal endurance. The DO-41 package facilitates easy through-hole integration into legacy or high-reliability designs. Consider the 4 Ω impedance characteristic for dynamic load variations. Verify that the operating environment remains within the specified -65°C to +200°C range to maintain performance integrity.

Part Context

This part belongs to the broader family of 1-watt Zener diodes housed in the DO-41 glass package. It shares mechanical dimensions and basic regulatory compliance with similar series components like the 1N4739A and 1N4747A, differing primarily in its specific 7.5 V breakdown voltage. The construction utilizes metallurgically bonded silicon die technology common to this product class.

Replacement Considerations

Direct substitutes include the Nexperia 1N4737A,113, which maintains identical electrical characteristics and package form factor. Other manufacturers producing the 1N4737A specification may also serve as functional equivalents provided they adhere to the same DO-41 mechanical constraints and 7.5 V tolerance limits.