1N3002B

Overview

The Microchip Technology 1N3002B is a silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 75V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 10W at specified temperatures. Key electrical parameters include a test current of 33mA and an impedance of 22 Ohms. It utilizes a stud-mount configuration within the DO-213AA package, facilitating direct thermal coupling to chassis or heat sinks for efficient heat removal in high-power environments.

Feature Summary

• High power handling capability with 10W dissipation rating
• Precision voltage regulation with ±5% tolerance
• Robust stud-mount construction for effective thermal management

Applications

• Chassis-mounted voltage regulation circuits
• High-power industrial power supplies
• Overvoltage protection systems requiring robust thermal performance

Procurement Notes

Verify the manufacturer origin, as the 1N3002B specification has been historically associated with Microsemi Corporation before its acquisition by Microchip Technology. Ensure the datasheet provided matches the specific lot and manufacturing era to confirm parameter consistency. Confirm that the DO-213AA package dimensions align with your mechanical design requirements for stud mounting.

Selection Notes

Select this component when a stable 75V reference is required in high-power scenarios where standard surface-mount packages cannot dissipate sufficient heat. The stud-mount form factor is critical for applications demanding direct thermal path to a metal chassis. Consider the 33mA test current requirement to ensure the driving circuit can sustain the necessary bias for accurate regulation.

Part Context

This part belongs to the family of 10-watt silicon Zener diodes. These components are engineered for rugged environments where reliability under high thermal stress is paramount. The 1N3002B specifically addresses the need for precise voltage clamping in heavy-duty electronics, distinguishing itself from lower-power planar diodes through its specialized mounting interface.

Replacement Considerations

Cross-reference with other 10W Zener diodes offering 75V nominal voltage and ±5% tolerance. Verify that any substitute supports stud-mount installation in the DO-213AA footprint. Ensure thermal resistance characteristics are comparable to maintain safe operating junction temperatures under identical load conditions.