1N4920A/TR

Overview

The 1N4920A/TR is a temperature-compensated Zener diode manufactured by Microchip Technology. It features a nominal Zener voltage of 19.2 V with a tolerance of ±5%. The device is rated for a power dissipation of 500 mW and operates within a reverse current range up to 15 µA. It utilizes a DO-204AH (DO-35) axial through-hole package. Key electrical parameters include a Zener impedance of 25 Ohms at a test current of 7.5 mA. The component supports an operating temperature range from -65°C to +175°C and exhibits a voltage temperature coefficient of 0.01%/°C.

Feature Summary

• Temperature compensated design ensures stable voltage regulation across wide thermal variations
• High maximum operating temperature capability suitable for demanding environments
• Through-hole axial construction for reliable mechanical mounting

Applications

• Precision voltage reference circuits requiring thermal stability
• Over-voltage protection in sensitive electronic systems
• Voltage regulation in industrial control equipment

Procurement Notes

Verify the specific suffix TR indicates reel packaging when ordering. Confirm RoHS compliance status as indicated in official documentation, noting potential non-compliance variants. Ensure the DO-204AH package dimensions match your PCB footprint requirements. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Check lead times as production cycles may vary.

Selection Notes

Select this component when precise voltage regulation under varying thermal conditions is critical. The 500 mW power rating allows for moderate current handling in series configurations. Consider the axial package constraints regarding board space and orientation. Compare against standard Zener diodes if temperature compensation is not required for the specific application environment.

Part Context

This part belongs to Microchip's discrete diode portfolio, specifically within the temperature-compensated Zener category. It serves as a specialized variant designed to minimize voltage drift due to temperature changes. The DO-35 form factor is a standard industry size for axial leads, facilitating integration into legacy and modern through-hole designs.

Replacement Considerations

Direct substitutes must match the 19.2 V Zener voltage, 500 mW power rating, and temperature compensation characteristics. Verify pinout compatibility for DO-204AH packages. Alternative manufacturers may offer similar specifications but require validation of the temperature coefficient and impedance values.