1N5248B Zener Diode 18V 0.5W

1N5248B Zener Diode 18 V 0.5W

The 1N5248B is a silicon planar Zener diode from the 1N52xxB series, designed to provide a stable reference voltage of 18 V in reverse-bias operation. Encapsulated in a standard DO-35 glass axial package, it is ideal for general-purpose electronics applications such as voltage regulation, reference generation, and small-signal protection. The diode supports up to 500 mW of power dissipation under correct thermal conditions and exhibits sharp reverse-breakdown characteristics with low reverse leakage current — making it reliable for both analog and digital circuit designs.

Features

• Zener breakdown voltage of 18 V.
• 0.5 W maximum power dissipation when properly heatsinked or mounted.
• Low reverse leakage current and tight breakdown tolerance (±5 %).
• Sharp reverse-characteristics — stable voltage reference under varying load conditions.
• Standard DO-35 glass-encapsulated axial package — easy to solder and integrate on PCB or perf-board.
• Wide operating temperature range (–65 °C to +200 °C storage; junction rated up to +175 °C).

Specifications

Applications

• Voltage regulation and reference in power supplies and linear regulators (e.g. 18 V reference rail).
• Over-voltage protection and voltage clamping in analog or digital circuits.
• Signal-conditioning circuits, comparators, and waveform clipping.
• Protection of inputs or outputs in microcontroller, sensor or communication modules.
• General-purpose use in test fixtures, power adapters, and DIY electronics projects requiring stable 18 V reference or clamp.

Package Contents

• 1× 1N5248B Zener Diode 18V 0.5W.

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