1N5343B

Single Zener Diodes Overview

The onsemi 1N5343B is a 5 Watt Zener voltage regulator diode featuring silicon-oxide passivated junctions housed in an axial lead, transfer-molded plastic package. It provides a nominal Zener voltage of 7.5 V with a tolerance of ±5%. The device operates within a temperature range of -65°C to +200°C and supports steady-state power dissipation up to 5 W at a lead temperature of 25°C. Electrical characteristics include a maximum Zener impedance of 1.5 Ohms at the test current of 175 mA, a reverse leakage current of 10 µA at 5.7 V, and a surge rating of up to 180 W for an 8.3 ms pulse width.

Single Zener Diodes Feature Summary

• Utilizes silicon-oxide passivated junction technology for improved operating characteristics and tight electrical limits.
• Encased in a void-free, transfer-molded thermosetting plastic package that offers corrosion resistance and protection against common environmental conditions.
• Features high ESD robustness rated at Class 3 per the Human Body Model, exceeding 16 kV.

Single Zener Diodes Applications

• Voltage regulation in electronic circuits requiring stable reference voltages.
• Protection against transient overvoltage events via surge absorption capabilities.
• General-purpose clipping and clamping applications in signal processing.

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix when purchasing; the 'G' suffix indicates a Pb-Free package. Confirm the required shipping format, as the component is available in both box (1000 units) and tape & reel (4000 units) configurations. Ensure compliance with RoHS directives if lead-free variants are mandated by the design specifications.

Single Zener Diodes Selection Notes

Select this component for designs requiring a precise 7.5 V reference with a ±5% tolerance. Consider the thermal resistance characteristics and derating requirements above 25°C when determining heat dissipation needs. Verify that the application's peak surge currents remain within the specified non-repetitive limits to ensure long-term reliability.

Single Zener Diodes Part Context

This part belongs to the 1N53 Series of 5 Watt Surmetic 40 Zener Voltage Regulators. The series covers a wide Zener voltage range from 3.3 V to 200 V, all sharing the same mechanical Case 017AA outline. The 'B' designation specifically denotes the ±5% tolerance class, distinguishing it from other precision or standard tolerance variants within the broader family.

Single Zener Diodes Replacement Considerations

Cross-reference with other manufacturers offering the 1N5343B specification. Ensure any substitute matches the 7.5 V nominal voltage, 5 W power rating, DO-15/Case 017AA package dimensions, and ±5% tolerance to maintain circuit performance without modification.

Single Zener Diodes FAQ

What is the maximum non-repetitive surge current rating?

The device has a surge rating of up to 180 W @ 8.3 ms, which corresponds to a specific peak current value dependent on the nominal Zener voltage.

How is polarity indicated on the component?

Polarity is indicated by a polarity band on the cathode end of the axial lead package.