1N5368B Zener Diode — 91V, 5W High-Voltage Regulation Diode

The 1N5368B is a high-power, high-voltage Zener diode engineered for precise voltage regulation and robust over-voltage protection in demanding electronic circuits. With a Zener voltage of 91 V and a power dissipation of 5 W, this device is ideal for industrial power rails, high-voltage DC systems, instrumentation, and protection networks where stable clamping and long-term reliability are essential.

🔧 Key Features

• ⚡ Zener Voltage: 91 V for high-voltage regulation and clamping
• 🔥 Power Dissipation: 5 W for robust energy handling
• 📏 Tolerance: ±5% for predictable set-point performance
• 🛡️ High surge capability with stable breakdown characteristics
• 🧰 Axial-lead glass package (DO-15) for easy through-hole mounting and integration

📦 Typical Applications

• 🔌 Power supply voltage regulation and reference networks
• 🛡️ Over-voltage protection circuits for high-voltage DC rails
• 🏭 Industrial and instrumentation systems requiring stable clamping
• 📈 High-voltage DC regulation in test and measurement equipment

📊 Technical Specifications

• Model: 1N5368B
• Zener Voltage (VZ): 91 V
• Power Rating (Ptot): 5 W
• Voltage Tolerance: ±5%
• Package: DO-15, axial-leaded glass
• Operating Temperature Range: −65°C to +200°C

🧩 Integration Notes for Engineers & Makers

• Use in high-voltage regulation and surge suppression stages ahead of sensitive electronics modules.
• Suitable for bench supplies and HV rails used alongside Arduino, Raspberry Pi, and other microcontroller-based test setups—on the power side, not as a low-voltage GPIO clamp.
• Ensure adequate thermal management and observe power dissipation limits under worst-case line and surge conditions.
• For precise regulation, operate near the diode’s rated test current as per the device datasheet and include appropriate series resistance.

📦 Package Includes

• 1 × 1N5368B 91V 5W Zener Diode

Engineered for reliable high-voltage clamping and long-term stability, the 1N5368B is a dependable choice for industrial designs, power electronics, and advanced hobby projects requiring robust voltage regulation from a proven electronics component.