1SMA5931BT3

Single Zener Diodes Overview

The onsemi 1SMA5931BT3 is a single-channel Zener voltage regulator diode housed in the SMA (DO-214AC) surface-mount package. It provides a nominal reverse Zener voltage of 18 V with a tolerance of ±5%. The device supports a maximum DC power dissipation of 1.5 W at 75°C and operates within a temperature range of -65°C to +150°C. Key electrical parameters include a test current of 20.8 mA, a maximum Zener impedance of 12 Ω, and a maximum reverse leakage current of 0.5 μA at 13.7 V.

Single Zener Diodes Feature Summary

• Flat handling surface designed for accurate placement during automated assembly
• Package design accommodates both top slide and bottom circuit board mounting configurations
• ESD rating of Class 3 exceeding 16 kV per Human Body Model
• Low profile plastic construction ideal as a replacement for MELF packages

Single Zener Diodes Applications

• Voltage regulation in electronic circuits
• Protection against electrostatic discharge events
• Replacement for legacy MELF package designs

Single Zener Diodes Procurement Notes

Verify that the specific part number matches the required voltage and package type. Confirm compliance requirements such as RoHS status if applicable. Ensure the ordering suffix aligns with lead-free specifications. Check datasheet details for thermal derating curves relevant to your operating environment. Validate marking codes for authenticity and traceability.

Single Zener Diodes Selection Notes

Select this component when a stable 18 V reference is needed in a compact surface-mount form factor. Consider the 1.5 W power dissipation limit and thermal resistance values for heat management. Evaluate the low leakage current and impedance characteristics for precision applications. Ensure the operating temperature range meets system environmental demands.

Single Zener Diodes Part Context

This device belongs to the 1SMA59xxBT3 series of 1.5 Watt Plastic Surface Mount Zener Voltage Regulators from onsemi. The series covers a standard breakdown voltage range from 3.3 V to 68 V. These regulators are designed for general-purpose voltage regulation and protection tasks in consumer and industrial electronics.

Single Zener Diodes Replacement Considerations

The datasheet identifies this series as an ideal replacement for MELF packages. Specific substitute part numbers are not provided in the source material.