Zener Diode (5.1V) 0.5W 5pcs

The Zener Diode (5.1V) 0.5W pack contains five through-hole zener diodes with a 5.1 V zener voltage and a 0.5 W power rating. Connected in reverse with a series resistor, a zener holds the voltage across it at about 5.1 V, which makes it a simple way to create a reference voltage, clamp signals to a safe level for 5 V logic, or build a basic low-current regulator.

Zener Diode (5.1V) 0.5W Specifications

• Zener voltage: 5.1 V (nominal)
• Power rating: 0.5 W
• Type: zener diode, axial leads, through-hole
• Polarity: the band marks the cathode
• Pack size: 5 pieces

Zener Diode (5.1V) 0.5W Applications

• 5.1 V reference voltage for comparators and ADC inputs
• Protecting microcontroller inputs from overvoltage
• Simple shunt regulators for low-current circuits
• Clamping signals in sensor and interface circuits
• Electronics classes and lab experiments

What's in the Box

• 5 × 5.1 V 0.5 W zener diodes

Tip: Connect the cathode (band) to the positive side and always use a series resistor: R = (Vin − 5.1 V) / I. For example, from 12 V at 10 mA use about 680 Ω, which keeps the zener at around 0.05 W, far below its 0.5 W rating.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.