1N4744A 15V 1W Zener Diode

1N4744A 15 V 1 W Zener Diode – DO‑41 Glass Axial Package by onsemi

The 1N4744A is a 15 V, 1 W power Zener diode designed for voltage reference and regulation tasks in a wide range of electronic circuits. Housed in a compact DO‑41 glass axial package, it offers a ±5% voltage tolerance and is built with a hermetically sealed construction to ensure long-term reliability under various environmental conditions.

This device is well-suited for use in protection, stabilization, and clipping circuits. Its low reverse leakage current and broad operating temperature range from −65 °C to +200 °C make it a reliable option for applications in telecom, power supplies, test equipment, and industrial control systems. The through-hole design ensures easy PCB integration for both new and legacy hardware designs.

The 1N4744A balances size, durability, and electrical precision, making it a practical choice for engineers working on general-purpose voltage regulation.

Key Specs Nominal Voltage: 15 V ±5% Power Rating: 1 W Test Current: ~17 mA Forward Voltage: ~1.2 V @ 200 mA Reverse Leakage: ≤5 µA @ ~11.4 V Zener Impedance: ~14 Ω Temperature Range: −65 °C to +200 °C Package: DO‑41 axial (glass sealed) Compliance: RoHS, lead-free version available

Features Stable voltage reference with ±5% tolerance Compact axial design for through-hole mounting Glass-sealed construction improves reliability Operates across a wide temperature range Suitable for clipping, voltage limiting, and transient suppression Low reverse leakage for improved regulation performance Compatible with industrial, telecom, and general-purpose electronics