1N5349BG

Overview

The onsemi 1N5349BG is a single-channel Zener voltage regulator diode from the 1N53 Series, designed for robust performance in axial lead applications. It features a nominal Zener voltage of 12 V with a ±5% tolerance and a maximum steady-state power dissipation of 5 W at 25°C. The device utilizes silicon-oxide passivated junctions within a Surmetic 40 (DO-15) plastic package. Key electrical parameters include a test current of 100 mA, a maximum Zener impedance of 2.5 Ω, and a reverse leakage current of 2 µA at 9.1 V. It supports an operating temperature range from -65°C to +200°C.

Feature Summary

• Utilizes silicon-oxide passivated junctions for superior operating characteristics and environmental protection.
• Provides tight limits on multiple electrical parameters including Zener voltage and impedance.
• Features high surge rating capability up to 180 W for non-repetitive square-wave pulses.
• Includes ESD protection rated at Class 3 (>16 kV) per the Human Body Model.

Applications

• Voltage regulation in general-purpose electronic circuits
• Overvoltage protection for sensitive components
• Reference voltage generation in power supplies

Procurement Notes

Verify that the ordering suffix 'G' corresponds to the Pb-Free package designation as specified in the manufacturer's documentation. Confirm the specific package variant (e.g., box or tape & reel) matches the required supply format. Ensure the component meets all applicable RoHS directives and environmental compliance standards relevant to the target market before finalizing procurement specifications.

Selection Notes

Select this component when a 12 V reference with 5 W power handling is required in an axial lead form factor. Consider the thermal resistance characteristics and derating requirements above 25°C for continuous operation. Evaluate the surge current capabilities against potential transient events in the application circuit to ensure adequate protection margins are maintained.

Part Context

This part belongs to the 1N53 Series of 5 Watt Zener Voltage Regulators manufactured by onsemi. The series offers a wide Zener voltage range from 3.3 V to 200 V, providing flexibility for various voltage regulation needs. All devices in this family share common mechanical characteristics, including void-free transfer-molded plastic packages and corrosion-resistant finishes suitable for diverse mounting positions.

Replacement Considerations

Cross-reference tools may identify parametrically similar parts from other manufacturers. Verify that any substitute maintains the same 12 V nominal voltage, 5 W power rating, and DO-15 axial package dimensions to ensure physical compatibility.