1N5386B

Overview

The onsemi 1N5386B is a silicon Zener voltage regulator diode with a nominal reverse voltage of 180 V and a maximum steady-state power dissipation of 5 W. It operates within a junction temperature range of -65 °C to +200 °C. The device features a maximum Zener impedance of 430 Ω at a test current of 5 mA, a maximum leakage current of 1 µA at 171 V, and a forward voltage of 1.2 V max at 1 A. It utilizes an axial lead plastic package (CASE 017AA) and offers ESD protection rated at Class 3 (>16 kV) per the Human Body Model.

Feature Summary

• Utilizes silicon-oxide passivated junctions for improved operating characteristics and environmental protection.
• Provides high surge capability with ratings up to 180 W for non-repetitive pulses lasting 8.3 ms.
• Features robust electrostatic discharge protection exceeding 16 kV under the Human Body Model standard.

Applications

• Voltage regulation in electronic circuits requiring stable reference levels.
• Protection against transient overvoltage events in power supply systems.
• Clamping applications for safeguarding sensitive components from electrical surges.

Procurement Notes

Verify that the specific part number matches the required tolerance and package configuration. Confirm compliance with RoHS directives if lead-free construction is mandatory for the assembly process. Ensure the ordering suffix aligns with the desired packaging format, such as bulk boxes or tape and reel options, to match production requirements.

Selection Notes

Select this component when a precise 180 V regulation point is necessary alongside high power handling capabilities. Consider the thermal resistance characteristics and derating requirements above 25 °C to ensure reliable operation. Evaluate the physical dimensions of the CASE 017AA package to confirm compatibility with the intended printed circuit board layout and mounting constraints.

Part Context

This device belongs to the 1N53 Series of 5 Watt Surmetic 40 Zener regulators. The series spans a wide voltage range from 3.3 V to 200 V, providing designers with standardized options for various regulation needs. All devices in this family share similar mechanical characteristics, including void-free transfer-molded plastic packages and corrosion-resistant finishes.

Replacement Considerations

Cross-reference with other manufacturers' 1N5386 equivalents to verify pinout and dimensional compatibility. Ensure substitute parts meet or exceed the 5 W power dissipation rating and the 180 V breakdown voltage specifications. Validate that alternative sources offer comparable impedance and leakage performance for critical circuit stability.