1N751A Zener Diode – 5.1 V, 0.5 W, DO‑35 Through‑Hole

The 1N751A is a precision silicon planar Zener diode featuring a nominal Zener voltage of 5.1 V with ±5% tolerance (suffix “A”), and a power dissipation rating of 0.5 W. Housed in a DO‑35 glass axial‑lead package, it is designed for use in voltage‑regulation, reference, and low‑power transient suppression applications. Its sharp reverse characteristic and stable temperature coefficient make it ideal for circuit designs requiring reliable, compact regulation. Robust manufacturing options (including military grade “‑1” suffix variants) are available for high‑reliability use.

Key Features:

• Nominal Zener voltage: 5.1 V at test current.
• Power dissipation: 0.5 W (500 mW) in DO‑35 axial glass package.
• Through‑hole mounting, axial leads allow easy insertion and soldering onto PCBs.
• Low leakage current and sharp reverse knee, suitable for precision regulation.
• Standard tolerance ±5% for suffix “A” version; other tolerances available.
• Wide variety of manufacturers and high‑reliability options (e.g., ‑1 suffix) for industrial/defense usage.

Additional Specifications:

• Mounting Style: Zener Diode (Silicon Planar)
• Maximum Peak Reverse Voltage (VRRM): 5.4V
• Forward Average Current (If): up to ~200 mA
• Forward Voltage (Vf): 1.5 V max at forward current I_F = 200 mA
• Maximum Surge Current: 70mA
• Reverse Current (Ir): 1.0 µA at reverse voltage VR = 1 V @ 25 °C; 20 µA at 70 °C in some specs