1SMA5951HR3G

Single Zener Diodes Overview

The 1SMA5951HR3G is a surface mount silicon Zener diode from the 1SMA5926–1SMA5956 series manufactured by Taiwan Semiconductor Corporation. It features a DO-214AC (SMA) package and provides a nominal Zener voltage of 120 V with a ±5% tolerance. The device supports a maximum DC power dissipation of 1.5 W at 75°C, derating at 20 mW/°C above this temperature. Electrical specifications include a test current of 3.1 mA, a maximum dynamic impedance of 360 Ω, and a leakage current not exceeding 0.5 µA at 91.2 V. The component operates within a junction temperature range of -55°C to +150°C.

Single Zener Diodes Feature Summary

• Glass passivated chip junction for enhanced reliability
• Low profile package optimized for automated placement
• Built-in strain relief and low inductance design
• ESD rating of Class 3B (HBM) per JEDEC standards

Single Zener Diodes Applications

• Switching mode power supply (SMPS)
• Adapters
• Lighting applications
• On-board DC/DC converter

Single Zener Diodes Procurement Notes

Verify that the ordering code matches the specific suffix requirements for the 1SMA5951 variant. Confirm compliance with RoHS directives and halogen-free status according to IEC 61249-2-21 definitions. Ensure packaging details align with standard tape and reel configurations for automated assembly processes.

Single Zener Diodes Selection Notes

Select this component when a 120 V regulation point is required in a compact SMA footprint. Consider the 1.5 W power dissipation limit and thermal derating characteristics for high-temperature environments. Verify that the ±5% voltage tolerance meets the circuit's precision requirements.

Single Zener Diodes Part Context

This part belongs to the 1SMA5926 through 1SMA5956 series of 1.5 W surface mount Zener diodes. The series covers a wide voltage range from 11 V to 200 V, all utilizing the standardized DO-214AC package. These devices are designed to replace through-hole equivalents while optimizing board space.

Single Zener Diodes Replacement Considerations

Direct substitutes within the same series include other 1SMA59xx variants with different voltage ratings. Cross-manufacturer replacements must match the DO-214AC package, 1.5 W power rating, and 120 V nominal voltage specification.