1N4730A

Overview

The SMC Diode Solutions 1N4730A is a silicon planar Zener diode designed for voltage regulation and clipping applications. It features a nominal Zener voltage of 3.9 V with a standard tolerance of ±10%, while the 'A' suffix indicates a tighter ±5% tolerance option. The device operates in a DO-41 glass axial lead package, providing a maximum steady-state power dissipation of 1 W at an ambient temperature of 25°C. It supports a wide operating temperature range from -65°C to +200°C junction temperature.

Feature Summary

• Utilizes silicon planar technology for stable voltage regulation performance.
• Features a hermetically sealed double-slug type glass construction for durability.
• Offers flexible mounting via standard axial leads compatible with through-hole processes.

Applications

• Voltage stabilization circuits
• Waveform clipping applications
• Reference voltage generation

Procurement Notes

Verify the specific tolerance grade required, as the base part number typically denotes ±10% while the A suffix specifies ±5%. Confirm RoHS compliance status and packaging format (reel or cut tape) directly with the manufacturer or authorized distributors, as these details vary by production batch and order configuration.

Selection Notes

Select this component when a 3.9 V reference is needed in a high-power axial package. Ensure the circuit design accounts for the 1 W power rating and derating requirements above 50°C. Verify that the ±5% tolerance meets the precision requirements of the target application compared to standard variants.

Part Context

This component belongs to the 1N47xx series of one-watt Zener diodes. It shares mechanical dimensions and electrical characteristics with equivalents from other manufacturers such as onsemi and Micro Commercial Components. The DO-41 package is a standard industry form factor for general-purpose power Zener regulators.

Replacement Considerations

Direct substitutes include the onsemi 1N4730A and MCC 1N4730A-TP. These parts share identical electrical ratings and the DO-41 package, allowing for pin-compatible replacement in existing designs without circuit modification.