Description
The 9V Zener Diode 0.5W (1/2 Watt) is a reliable and essential component designed for voltage regulation, protection, and stabilization in a wide range of electronic circuits. Whether you are building power supplies, voltage reference circuits, or protection modules, this diode ensures consistent and stable 9V output with excellent precision. At Rafiq Electronics, we provide high-quality and original components to support all your DIY electronics and repair projects.
This Zener diode works by maintaining a stable 9V across its terminals once the breakdown voltage is reached, making it perfect for applications that require consistent voltage regulation. It is widely used in microcontroller circuits, battery protection, LED drivers, sensors, chargers, and educational electronics projects.
Built with glass encapsulation, the diode offers excellent durability, moisture resistance, and long-term stability. Its 0.5W (1/2 Watt) power rating ensures it can handle various low-power circuits safely. Whether you are a hobbyist, technician, or engineer, this Zener diode provides high reliability and consistent performance.
🔧 Key Features
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✅ 9V Nominal Zener Voltage – Stable and accurate voltage regulation
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🔌 0.5 Watt Power Rating – Suitable for low-power electronic circuits
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⚙️ Glass Encapsulated Build – Durable, moisture-resistant, long-life component
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🛡️ Protection Role – Safeguards circuits from overvoltage
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🔧 Ideal for DIY Projects – Perfect for hobbyists, students, and repair technicians
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💡 Wide Applications – Power supplies, battery chargers, instrumentation circuits
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🏪 Available at Rafiq Electronics – Your trusted electronic components store
📘 Applications
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Voltage reference circuits
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Power supply regulation
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Overvoltage protection
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Battery-powered devices
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LED drivers
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Arduino/ESP32/Raspberry Pi based projects
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Educational & DIY electronics kits
📏 Specifications
| Parameter | Details |
|---|---|
| Model Number | 1N4739A |
| Zener Voltage (Vz) | 9V |
| Power Rating | 0.5W (1/2 Watt) |
| Tolerance | ±5% |
| Package Type | Through-Hole (DO-41) |
| Polarity | Cathode Marked with Band |
| Material | Glass Encapsulated |
At Rafiq Electronics, we ensure that all electronic components are tested, reliable, and delivered with proper packaging to prevent damage. Whether you are assembling a new project or repairing an existing device, this 9V Zener diode is a perfect and dependable choice.





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