200PCS 1W Zener Voltage Regulator Diode Kit 1N4728~1N4737 (Plastic Box NO.1)

This 1W Zener Diode Voltage Regulator Kit is a comprehensive assortment of 200 high-quality Zener diodes, conveniently packaged in a labeled plastic storage box for easy organization and access. The kit includes 10 of the most commonly used Zener values in the 3.3V to 7.5V range, covering nearly every standard low-voltage regulation requirement in modern electronic design.

Zener diodes are unique semiconductor devices that operate in reverse-bias breakdown mode to maintain a stable, well-defined output voltage regardless of moderate input voltage variations. They are widely used as voltage references, shunt regulators, overvoltage protection elements, noise generators, and clipping/clamping circuits. With their predictable breakdown behavior, low forward voltage drop, and fast response time, Zener diodes form the backbone of countless analog and power circuits.

Each diode in this kit features a 1W power dissipation rating, low leakage current, excellent breakdown voltage tolerance, and high efficiency, ensuring stable performance in both prototype experiments and production designs. The diodes are housed in standard DO-41 axial leaded packages, making them easy to insert into breadboards, prototyping boards, perfboards, or to solder directly onto PCBs.

This kit is especially well-suited for engineers, technicians, electronics students, and hobbyists who frequently work with regulated power supplies, microcontroller circuits, sensor signal conditioning, and automotive or industrial protection circuitry. Each value is clearly labeled in its own compartment, allowing users to quickly locate the exact Zener voltage they need without sorting through loose components.

Specifications

• Quantity: 200 pieces total
• Number of Values: 10
• Quantity per Value: 20 pieces
• Power Rating: 1 Watt
• Package: DO-41 axial leaded
• Storage: Labeled plastic organizer box (NO.1)
• Tolerance: Typically ±5% (B-grade)
• Operating Temperature: -65°C to +175°C

Values Included (Breakdown Voltage):

• 1N4728 — 3.3V
• 1N4729 — 3.6V
• 1N4730 — 3.9V
• 1N4731 — 4.3V
• 1N4732 — 4.7V
• 1N4733 — 5.1V
• 1N4734 — 5.6V
• 1N4735 — 6.2V
• 1N4736 — 6.8V
• 1N4737 — 7.5V

Applications

• Voltage Regulation in low-power circuits (power supplies, sensor boards)
• Voltage Reference in ADC, DAC, and analog signal processing
• Overvoltage Protection for sensitive ICs, MCUs, and gates
• Microcontroller Pin Protection against transient surges
• Clipping and Clamping Circuits for signal shaping
• Noise Generation Circuits in audio and RF design
• Surge and Transient Protection in automotive and industrial circuits
• Battery Charging Indicators and Limiters
• LED Driver Voltage Limiting
• Educational Electronics Labs for teaching diode characteristics
• Repair and Maintenance of consumer electronics, audio gear, and instruments
• Hobbyist and DIY Projects including Arduino, Raspberry Pi, and ESP boards
• Prototype Bench Stock for rapid circuit design and testing

Note: Zener diodes are polarized components. Always observe correct polarity: the cathode (marked with a black band) should connect to the higher voltage side when used in reverse-bias regulation mode. To prevent damage, ensure the current through the diode does not exceed its rated power dissipation by using an appropriate current-limiting resistor in series. Use the formula: R = (V_in - V_z) / I_z to calculate the required resistor value.