Zener Diode (12V) 0.5W 5pcs

The Zener Diode (12V) 0.5W is a through-hole Zener diode with a breakdown voltage of 12 V and a power rating of 0.5 W, sold in a pack of 5. Used in reverse bias with a series resistor, it holds the voltage across it at about 12 V, so it is a simple way to make a voltage reference, clamp spikes on 12 V lines or protect a MOSFET gate from overvoltage.

Zener Diode (12V) 0.5W Specifications

• Zener voltage: 12 V (nominal)
• Power rating: 0.5 W (500 mW)
• Maximum Zener current: about 40 mA in theory (0.5 W ÷ 12 V); stay well below this in practice
• Type: Zener diode, through-hole
• Polarity: cathode marked with a band
• Pack size: 5 pieces

Zener Diode (12V) 0.5W Applications

• 12 V voltage references
• Simple shunt regulators for low-current circuits
• Gate protection for power MOSFETs, fitted between gate and source
• Clamping voltage spikes on 12 V signal and sensor lines
• Electronics labs on diode characteristics

What's in the Box

• 5 × 12 V 0.5 W Zener diodes

Tip: Connect the cathode (band end) to the positive side so the diode is reverse biased, and always use a series resistor: R = (Vin − 12 V) ÷ I. For example, from 24 V at 10 mA use about 1.2 kΩ, which dissipates 0.12 W.

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