1N5355B

Overview

The onsemi 1N5355B is a silicon unidirectional voltage regulator diode with a nominal Zener voltage of 18 V and a maximum steady-state power dissipation of 5 W. It features a ±5% tolerance, a test current (IZT) of 65 mA, and a maximum Zener impedance (ZZT) of 2.5 Ω at IZT. The device operates within a temperature range of -65°C to +200°C and exhibits a reverse leakage current of 500 nA at 13.7 V. Packaged in an axial lead Case 017AA plastic housing, it supports mounting positions in any orientation.

Feature Summary

• Utilizes silicon-oxide passivated junctions for superior operating characteristics and tight electrical limits.
• Encased in void-free, transfer-molded thermosetting plastic providing corrosion resistance and environmental protection.
• Capable of handling high peak reverse power dissipation with surge ratings up to 180 W at 8.3 ms pulse width.
• Offers ESD protection rated at Class 3 (>16 kV) per the Human Body Model.

Applications

• Voltage regulation in electronic circuits requiring stable reference voltages.
• Protection against voltage spikes and transient overvoltage events.
• Clamping applications in signal processing and power supply designs.

Procurement Notes

Verify that the ordered part number matches the specific suffix requirements, such as 'G' for Pb-Free packaging or 'RL' for tape and reel shipping configurations. Confirm compliance with RoHS directives and REACH regulations based on the manufacturing date code. Ensure the supplier provides valid documentation confirming the component's origin from authorized semiconductor manufacturers to guarantee authenticity and traceability.

Selection Notes

Select this component when a precise 18 V regulation point is required with a 5 W power handling capability. Consider the axial lead package dimensions and thermal resistance characteristics for heat dissipation needs. Evaluate the operating temperature range and surge current ratings against the specific circuit conditions to ensure reliable performance under all expected load variations.

Part Context

This device belongs to the 1N53xxB series of 5 Watt Surmetic 40 Zener Voltage Regulators. The series covers a wide Zener voltage range from 3.3 V to 200 V, offering consistent mechanical and electrical specifications across different voltage ratings. All devices in this family share the same axial lead Case 017AA plastic package and utilize silicon-oxide passivation technology for enhanced reliability.

Replacement Considerations

Compatible substitutes include the 1N5355B manufactured by Diotec Semiconductor and Micro Commercial Components (MCC). Verify that alternative sources maintain identical electrical parameters, specifically the 18 V nominal voltage, 5 W power rating, and ±5% tolerance, while ensuring the axial lead package compatibility matches the original design constraints.