1N4750A

Overview

The onsemi 1N4750A is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 27 V with a standard tolerance of ±5%. The device supports a power dissipation of 1 W and operates within an extended temperature range from -65 °C to +200 °C. Key electrical characteristics include a maximum reverse leakage current of 5 µA at 20.6 V and a Zener impedance of 35 Ohms, measured at a test current of 9.5 mA. The component utilizes a DO-41-2 axial through-hole package.

Feature Summary

• Glass passivated die construction ensures high reliability and long-term stability under various operating conditions.
• Capable of handling up to 1 W of power dissipation for robust voltage regulation in demanding circuits.
• Low inductance design minimizes switching noise and improves performance in high-frequency applications.

Applications

• Voltage reference sources in precision measurement equipment
• Overvoltage protection circuits for sensitive electronic components
• Clipper and clamper circuits in signal processing systems

Procurement Notes

Verify the specific manufacturer marking and datasheet revision when sourcing, as multiple vendors produce this part number. Confirm compliance with RoHS and REACH regulations if required by your manufacturing standards. Ensure the package type matches your PCB footprint requirements, typically DO-41 for through-hole mounting. Cross-reference specifications such as Zener impedance and leakage current against your circuit design constraints before finalizing procurement decisions.

Selection Notes

Select the 1N4750A when a stable 27 V reference is needed with moderate power handling capabilities. Consider the ±5% tolerance for general-purpose regulation rather than high-precision applications requiring tighter voltage control. Evaluate the thermal management requirements given the 1 W dissipation rating and ensure adequate heat sinking or airflow if operating near maximum limits. Verify that the axial leaded package fits the assembly process and mechanical constraints of the target enclosure.

Part Context

This component belongs to the widely used 1N47xx series of Zener diodes, which are standardized for voltage regulation tasks. The 1N4750A specifically targets the 27 V segment of this family, offering a balance between voltage level and power handling. It serves as a fundamental discrete semiconductor element in analog electronics, providing a reliable baseline for biasing and protection functions across industrial and consumer applications.

Replacement Considerations

The 1N971BTR is documented as a similar replacement option, though it differs in power rating (500 mW) and packaging (DO-35). Verify compatibility regarding thermal dissipation and physical space constraints when substituting. Other manufacturers may offer equivalent parts under the same 1N4750A designation, but always confirm electrical parameters match the original design requirements.