1N5381B

Overview

The Microsemi Corporation 1N5381B is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333-5388B series, housed in an axial-lead T-18 package. It provides a nominal Zener voltage of 130 V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and features a maximum reverse current of 0.5 µA at 93.6 V. Electrical characteristics include a test current of 10 mA, a maximum dynamic impedance of 190 Ω, and a maximum regulator current of 36.6 mA.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Withstands high surge stresses and withstands ESD per MIL-STD-750 Method 1020
• Features flexible axial-lead mounting terminals for through-hole integration
• Utilizes void-free transfer molded thermosetting epoxy body meeting UL94V-0

Applications

• Voltage regulation circuits requiring stable DC reference voltages
• Overvoltage protection for power supply inputs
• High reliability applications utilizing military screening prefixes

Procurement Notes

Verify the specific suffix letter on the part number to confirm the exact voltage tolerance required for the application. Confirm that the procurement includes the correct packaging option, such as tape and reel or bulk, if specified by design constraints. Ensure compliance with RoHS requirements by checking for the e3 suffix if lead-free components are mandated. Cross-reference the manufacturer's datasheet for any recent product change notices or obsolescence alerts before finalizing orders.

Selection Notes

Select this component when a 5-watt power dissipation rating is necessary for high-current regulation tasks. The T-18 axial-lead package is suitable for designs requiring robust mechanical mounting and adequate heat sinking. Consider the thermal resistance specifications to ensure proper heat dissipation under steady-state conditions. Verify that the 130 V breakdown voltage aligns with the circuit's operational limits and transient suppression requirements.

Part Context

This component belongs to the 1N5333B through 1N5388B series of silicon Zener diodes manufactured by Microsemi. The series covers a wide voltage selection from 3.3 V to 200 V, offering various tolerance options identified by suffix letters. These devices are designed for applications requiring high power handling capabilities and reliable performance in demanding environments.

Replacement Considerations

Surface mount equivalents are available in the SMBJ5333 to SMBJ5388B or SMBG5333B to SMBG5388B series. For higher reliability needs, military screening levels can be obtained by adding MQ, MX, or MV prefixes to the part number.