1N4731AW-TP

Overview

The MCC 1N4731AW-TP is a silicon planar power Zener diode in the 1N4729AW through 1N4761AW series, rated at 1.0 W DC power dissipation. It features a low-profile SOD-123 surface-mount package with dimensions of 2.85 mm length, 1.8 mm width, and 1.35 mm height. The device provides a nominal Zener voltage (Vz) of 4.3 V with a tolerance of ±5%. Electrical characteristics include a maximum reverse leakage current (Ir) of 10 µA at 1.0 V, a dynamic impedance (Zzt) of 9 Ω at Izt = 58 mA, and a forward voltage drop (Vf) of 1.2 V at 200 mA. Operating and storage temperatures range from -55°C to +150°C.

Feature Summary

• Utilizes silicon planar technology for robust voltage regulation
• Designed in a compact, low-profile surface-mount package
• Offers hermetic glass sealing with lead-free finish

Applications

• General-purpose voltage regulation circuits
• Overvoltage protection stages
• Reference voltage sources in electronic systems

Procurement Notes

Verify authenticity by purchasing directly from Micro Commercial Components or authorized distributors to avoid counterfeit parts. Confirm RoHS compliance status via official documentation. Ensure the specific ordering suffix matches project requirements, as variations may affect halogen content or packaging format. Review datasheet notes regarding thermal resistance and derating curves before finalizing procurement specifications.

Selection Notes

Select this component for applications requiring a 4.3 V reference in a surface-mount footprint. Consider the 1.0 W power rating and thermal resistance of 100 K/W when designing heat dissipation strategies. Verify that the operating temperature range of -55°C to +150°C aligns with environmental conditions. Check if the SOD-123 package dimensions fit within the available PCB area constraints.

Part Context

This part belongs to the 1N4729AW through 1N4761AW series of 1.0 Watt Zener diodes manufactured by Micro Commercial Components. The series covers a voltage selection from 3.6 to 75 Volts with 5% tolerances. These devices are designed for general-purpose regulation and protection, offering a balance of performance and cost-effectiveness in standard industrial and commercial electronics.

Replacement Considerations

Cross-reference with other manufacturers' 1N4731A equivalents in SOD-123 packages. Verify matching electrical parameters such as Zener voltage, tolerance, and power dissipation. Ensure physical dimensions and pinout compatibility before substitution.