Zener Diode 7.5V 500mW (Pack of 5)

Wiring Connections:

• Cathode (Negative): Connect the cathode side (band-marked end) to the higher voltage side in reverse bias mode for voltage regulation.
• Anode (Positive): Connect the anode side to the ground or lower voltage side.
• Usage in Reverse Bias: For voltage regulation, place the Zener diode in reverse bias mode, where the cathode is at a higher potential than the anode.

Power:

• Maximum Power Dissipation: 500mW (0.5W) ensures that the diode can handle moderate power levels without overheating.
• Operating Current: The diode operates in reverse breakdown mode, with a current limited by the external circuit (in the range of milliamps depending on the series resistor).

Input and Output:

• Input Voltage: Applied voltage greater than 7.5V in reverse bias mode.
• Output Voltage: The Zener diode will regulate and maintain the voltage at 7.5V.

Physical Characteristics:

• Package Type: Commonly in DO-35 axial package, small cylindrical body with two leads extending from each end.
• Size: Length is around 2.5mm to 3mm, with lead lengths suitable for through-hole PCB mounting.
• Material: Made from silicon-based semiconductor material for efficient voltage regulation.
• Weight: Lightweight, around 0.1g to 0.2g per diode.

Technical Specifications:

• Zener Breakdown Voltage: Precisely rated at 7.5V with tight tolerances for stable regulation.
• Max Reverse Current (IR): in microamperes (µA), indicating a low leakage current when the diode is reverse biased but not in breakdown.
• Max Zener Current (IZ): Limited by the external resistor to ensure the diode operates within its 500mW power dissipation limit.
• Thermal Resistance: Designed to handle temperature fluctuations with good thermal stability.

Additional Features:

• Protection Against Voltage Spikes: Ideal for clamping voltage spikes in circuits to protect components.
• Long Shelf Life: Due to its simple semiconductor construction, the Zener diode has a long shelf life and low degradation over time.
• Common Usage: Used in a variety of electronic devices like power supplies, battery chargers, and voltage reference circuits.
• Comes in Packs of 5: Convenient packaging for bulk or multiple circuit designs.

How to Use:

1. Voltage Regulation:
   • To regulate voltage, connect the Zener diode in reverse bias across the load.
   • Ensure that the supply voltage is higher than the Zener voltage (7.5V) for proper operation.
2. Current Limiting Resistor:
   • Use a series resistor to limit the current flowing through the Zener diode and prevent damage due to excessive power dissipation.
   • The value of the resistor depends on the input voltage, Zener voltage, and the desired current.
3. Clamping Voltage Spikes:
   • For protecting circuits from voltage spikes, connect the Zener diode in reverse bias across sensitive components like transistors or microcontrollers.
   • The diode will clamp any voltage exceeding 7.5V, protecting the components from damage.
4. Testing:
   • Use a multimeter to test the Zener voltage in reverse bias mode. Apply a voltage higher than 7.5V and verify that the output voltage stabilizes at 7.5V.
   • Ensure the current stays within the safe operating range to avoid exceeding the 500mW power rating.

Applications:

• Voltage Regulation: Commonly used in power supplies to maintain a constant output voltage.
• Overvoltage Protection: Protects circuits by limiting the maximum voltage to 7.5V.
• Reference Voltage: Provides a stable reference voltage for analog and digital circuits.
• Clamping Circuits: Prevents voltage spikes from damaging sensitive components in electronic systems.
• Battery Chargers: Used in battery charging circuits to regulate voltage levels.

The Zener Diode 7.5V 500mW (Pack of 5) is an essential component for regulating voltage, protecting circuits, and clamping voltage spikes. With a breakdown voltage of 7.5V and a power dissipation rating of 500mW, it provides reliable performance in various electronic applications. Its compact size, easy integration, and high stability make it an ideal choice for voltage regulation in power supplies, battery chargers, and voltage reference circuits.