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1SMA5931BT3G

1.5W 18V Zener diode, SMA package, 5% tolerance, AEC-Q101, ESD Class 3

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Manufacturer Part：

1SMA5931BT3G

Package：

SMA (DO-214AC) (4.32 x 2.6 x 2.0 mm)

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Description

Product Overview

The 1SMA5931BT3G from onsemi is a 1.5 Watt Zener Voltage Regulator Diode with a nominal Zener voltage of 18 V in a SMA (DO-214AC) surface mount package. It is AEC-Q101 qualified and suitable for automotive and general-purpose voltage regulation applications.

Key Specifications

Zener Voltage (VZ) 18 V (nominal)
VZ Tolerance 5%
Power Dissipation 1.5 W
Zener Impedance (ZZT) 12 Ohm @ IZT
Reverse Leakage Current 500 nA max @ VR
IZM 83 mA
ESD Rating Class 3 (>16 kV HBM)
Operating Temperature -65°C to +150°C
Package SMA (DO-214AC)

Features

  • Nominal Zener voltage: 18 V with 5% tolerance
  • 1.5 W power dissipation in SMA package
  • ESD rating Class 3 (>16 kV) per Human Body Model
  • Flat handling surface for accurate placement
  • Low profile surface mount package
  • AEC-Q101 qualified and PPAP capable
  • Pb-free and halogen-free construction

Applications

  • Voltage regulation and stabilization
  • Waveform clipping circuits
  • MOSFET gate protection
  • Automotive electronics
  • General-purpose voltage reference

The 1SMA5931BT3G from onsemi is a 1.5 Watt surface mount Zener voltage regulator diode from the 1SMA59xxBT3G series. It provides a nominal Zener voltage of 18 V with 5% tolerance. The device features ESD protection exceeding 16 kV per Human Body Model, AEC-Q101 qualification for automotive applications, and a low-profile SMA package ideal for automated assembly. The flat handling surface ensures accurate pick-and-place positioning.

The 1SMA5931BT3G operates as a Zener diode in reverse breakdown mode. When the reverse voltage exceeds the Zener breakdown voltage of 18 V, the diode conducts and maintains a stable voltage across its terminals with low dynamic impedance of 12 Ohms. This voltage regulation characteristic makes it suitable for protecting sensitive circuitry from voltage transients and providing stable reference voltages. The device handles up to 1.5 W of power dissipation through its SMA package.

Pin Name Type Function
1 Cathode Terminal Cathode (indicated by polarity band)
2 Anode Terminal Anode
  • Voltage regulation in power supplies
  • Overvoltage and ESD protection for MOSFET gates
  • Automotive electronic control units
  • Waveform clipping and signal limiting
  • General-purpose voltage reference circuits
Manufacturer Part Number Package Notes
onsemi 1SMA5932BT3G SMA 20V Zener, same series
onsemi 1SMA5930BT3G SMA 16V Zener, same series
Nexperia BZX384C18 SOD-323 18V 300mW smaller package
Vishay 1SMB5931BT3G SMB 18V 3W higher power
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Quality Assurance

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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