1N4737A-T50A

Overview

The onsemi 1N4737A-T50A is a silicon unidirectional Zener diode housed in the DO-41 axial through-hole package. It provides a nominal Zener voltage of 7.5 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 1 W and operates within a temperature range of -65°C to +200°C. Key electrical characteristics include a maximum dynamic impedance of 4 Ohms and a maximum reverse leakage current of 10 µA at 5 V.

Feature Summary

• Hermetically sealed glass construction utilizing double slug type metallurgically bonded design
• Capable of high thermal stability with an extended operating temperature range up to 200°C
• Features oxide passivated die for enhanced corrosion resistance and reliability

Applications

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

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm RoHS compliance status and REACH material declarations prior to integration. Ensure the DO-41 package dimensions match the target PCB footprint requirements. Validate that the specific suffix corresponds to the desired packaging format such as cut tape or tube.

Selection Notes

Select this component when a precise 7.5 V reference is required in high-temperature environments. The DO-41 package supports robust through-hole mounting for mechanical durability. Consider the 1 W power rating for applications involving moderate current loads. Verify that the 4 Ohm dynamic impedance meets the circuit's noise and stability requirements.

Part Context

This part belongs to the standard 1N47xx series of one-watt Zener diodes manufactured by onsemi. The series offers a wide range of voltage options from 3.3 V to 100 V within the same DO-41 form factor. These devices are widely used in industrial and commercial electronics for basic voltage clamping and regulation tasks.

Replacement Considerations

Direct substitutes include the generic 1N4737A and the Nexperia variant 1N4737A,113. Both alternatives maintain identical electrical ratings and the DO-41 package configuration.