1N4740A

Overview

The SMC Diode Solutions 1N4740A is a silicon planar Zener diode designed for voltage regulation and reference applications. It utilizes the DO-41 axial leaded package, suitable for through-hole mounting on printed circuit boards. The device provides a nominal Zener voltage of 10 V with a tolerance of ±5%. It supports a maximum power dissipation of 1 W at ambient temperatures up to +75°C. Key electrical characteristics include a maximum reverse leakage current of 10 µA and a Zener impedance of 7 Ω at the test current of 25 mA. The component operates within a junction temperature range of -65°C to +200°C.

Feature Summary

• Provides stable voltage regulation using a silicon planar structure.
• Features low reverse leakage current for efficient standby operation.
• Designed for high thermal stability with a wide operating temperature range.

Applications

• Voltage regulation in power supply circuits
• Reference voltage sources for analog circuits
• Overvoltage protection stages

Procurement Notes

Verify the manufacturer part number against official SMC Diode Solutions documentation to confirm specifications. Ensure the required packaging format matches project needs. Check RoHS compliance status via the specific datasheet revision. Confirm availability and lead times directly with authorized distributors or the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when a standard 10 V regulation point is required in through-hole designs. Consider the 1 W power rating and DO-41 package size for thermal management constraints. Verify that the ±5% voltage tolerance meets the circuit requirements. Compare against other manufacturers offering identical JEDEC registration numbers if supply chain diversity is needed.

Part Context

The 1N4740A belongs to the widely recognized 1N47xx series of Zener diodes. This series is standardized under JEDEC registration, ensuring interchangeability across different semiconductor manufacturers. The 1N4740A specifically denotes the 10 V variant within this family, commonly used in general-purpose electronics for basic voltage clamping and regulation tasks.

Replacement Considerations

Direct replacements include the 1N4740A from onsemi, Nexperia (1N4740A,133), Vishay Semiconductors (1N4740A-TR), and Taiwan Semiconductor (1N4740AHA0G). These parts share the same JEDEC designation and electrical parameters, allowing for pin-compatible substitution in existing designs.