1N4729A-TAP

Overview

The Vishay 1N4729A-TAP is a silicon planar power Zener diode in the DO-41 (DO-204AL) glass package. It provides a nominal Zener voltage of 3.6 V with a standard tolerance of ±5 %. The device operates at a test current of 69 mA and dissipates up to 1300 mW. Key electrical parameters include a maximum reverse leakage current of 100 μA, a dynamic impedance of 10 Ω, and a surge current rating of 1260 mA. It supports an operating temperature range from -65 °C to +175 °C.

Feature Summary

• Silicon planar construction for high power rating applications
• Hermetically sealed glass encapsulation in the DO-41 package
• Standardized ±5 % Zener voltage tolerance

Applications

• Voltage stabilization circuits
• Signal clipping circuits

Procurement Notes

Verify the specific ordering code suffix against the manufacturer's official documentation to confirm packaging details. Confirm that the component meets required material categorization standards and compliance definitions as outlined in the datasheet. Ensure technical specifications align with the intended application requirements before finalizing procurement.

Selection Notes

Select this component for applications requiring stable voltage regulation within the specified power dissipation limits. Consider the thermal resistance and ambient temperature derating curves when designing the circuit layout. Validate the forward voltage characteristics and leakage currents against system constraints to ensure reliable operation across the full temperature range.

Part Context

This part belongs to the Vishay 1N4728A through 1N4761A series of Zener diodes. The series covers a wide voltage range from 3.3 V to 75 V, all utilizing the same DO-41 glass package. These devices are designed for general-purpose voltage regulation and protection tasks where moderate power handling is required.

Replacement Considerations

Cross-reference with other manufacturers offering equivalent DO-41 packaged Zener diodes rated at 3.6 V and 1 W. Verify pinout compatibility and physical dimensions to ensure mechanical fit. Confirm that alternative components meet or exceed the required electrical performance metrics and thermal ratings.

FAQ

What is the maximum power dissipation of the 1N4729A?

The maximum power dissipation is 1300 mW, provided that the leads are kept at ambient temperature.

What is the Zener impedance at the test current?

The dynamic impedance is 10 Ω at the test current of 69 mA.