1SMA4743 R3G

Single Zener Diodes Overview

The 1SMA4743 R3G is a surface mount Zener diode from the 1SMA series by Taiwan Semiconductor. It features a DO-214AC (SMA) package with a nominal Zener voltage of 13 V and a ±5% tolerance. The device operates at a test current of 19 mA, exhibiting a maximum Zener impedance of 10 Ω and a leakage current of 0.25 µA at 9.9 V. Rated for 1 W power dissipation at 25°C, it supports a junction temperature range of -55°C to +175°C.

Single Zener Diodes Feature Summary

• Glass passivated chip junction for enhanced reliability
• Built-in strain relief suitable for automated placement
• Low inductance design for high-frequency performance
• Halogen-free compound compliant with IEC 61249-2-21

Single Zener Diodes Applications

• General purpose voltage regulation
• Circuit protection applications

Single Zener Diodes Procurement Notes

Verify the specific part number against official manufacturer documentation to confirm electrical characteristics and mechanical specifications. Ensure compliance with RoHS directives and halogen-free requirements as stated in the datasheet. Confirm moisture sensitivity level and soldering parameters prior to assembly to maintain component integrity during manufacturing processes.

Single Zener Diodes Selection Notes

Select this component for applications requiring precise voltage reference or clamping within the SMA footprint. Consider the thermal derating curves when designing for ambient temperatures exceeding 25°C. Verify that the peak forward surge current capability aligns with potential transient events in the target circuit environment.

Single Zener Diodes Part Context

This component belongs to the 1SMA4737–1SMA200Z series, covering Zener voltages from 7.5 V to 200 V. All devices in this family share identical mechanical dimensions and packaging standards, facilitating consistent board layout strategies across various voltage rating requirements within the same product line.

Single Zener Diodes Replacement Considerations

Direct substitutes must match the 13 V nominal voltage, 1 W power rating, and DO-214AC package. Verify equivalent Zener impedance and leakage current specifications to ensure circuit performance parity.