1N4735A

Overview

The SMC Diode Solutions 1N4735A is a silicon planar power Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 6.2 V with a tolerance of ±5%. The device operates in the DO-41 axial through-hole package and supports a maximum DC power dissipation of 1 W at 25°C ambient temperature. Key electrical characteristics include a maximum reverse leakage current of 10 µA, a Zener impedance of 2 Ω, and a test current of 41 mA. The component is rated for a junction temperature range from -65°C to +200°C.

Feature Summary

• Provides stable voltage regulation using silicon planar technology within the standard 1W power class.
• Features a robust glass DO-41 axial leaded package suitable for high-temperature environments up to 200°C.
• Offers tight voltage tolerance of ±5% for precise reference applications.

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in power supplies
• General-purpose clipping and clamping applications

Procurement Notes

Verify the specific manufacturer designation when sourcing, as the 1N4735A is a standardized JEDEC part number produced by multiple vendors including onsemi, Nexperia, and Microsemi. Confirm that the supplier explicitly lists SMC Diode Solutions as the manufacturer if brand-specific traceability or quality standards are required. Ensure the package type matches the DO-41 specification for your PCB layout.

Selection Notes

Select this component when a 6.2 V regulated rail is needed in a through-hole design. The 1W power rating allows for significant current handling compared to smaller signal diodes. Consider the 2 Ω dynamic impedance for noise sensitivity; lower impedance variants may be necessary for high-precision analog references. Verify thermal derating requirements if operating near the upper temperature limit.

Part Context

The 1N4735A belongs to the widely used 1N47xx series of 1-watt Zener diodes. This family covers a broad spectrum of voltages from 3.3V to 100V, making it a standard choice for industrial and commercial electronics. The DO-41 package is an industry-standard form factor for axial components, ensuring compatibility with existing manufacturing equipment and board designs.

Replacement Considerations

Direct functional substitutes include the 1N4735A from manufacturers such as onsemi, Nexperia, Microsemi, and Fairchild. These parts share identical electrical specifications and mechanical dimensions. Ensure any replacement maintains the DO-41 package and 1W power rating to fit existing footprints and thermal constraints.