The 1N4736A 6.8V 1W Zener Diode is a high-precision semiconductor designed for voltage regulation and circuit protection. At Electrapac, we recommend this diode for electronics enthusiasts and repair technicians in Bangladesh who need to maintain a steady reference voltage or protect sensitive components from overvoltage spikes.

Product Overview

Unlike a standard diode that blocks current in reverse, the 1N4736A is designed to "break down" at exactly 6.8V when reverse-biased. This characteristic allows it to act as a simple yet effective voltage regulator. With a 1 Watt power rating, this diode is much more robust than the common 0.5W versions, allowing it to handle higher current loads without overheating.

Key Features for Electrapac Customers

• Stable Voltage Regulation: Maintains a consistent 6.8V output even if the input voltage fluctuates, making it ideal for creating stable reference voltages for Op-Amps or ADCs.

• High Power Handling: The 1W rating provides a significant safety margin for industrial and DIY projects, ensuring longevity under continuous operation.

• Overvoltage Protection: Can be used as a "clamping" diode to protect sensitive microcontroller pins (like those on an Arduino or ESP32) from reaching dangerous voltage levels.

• Low Reverse Leakage: Ensures minimal power loss when the circuit is operating below the Zener threshold.

• Durable DO-41 Glass Case: The hermetically sealed glass package offers excellent environmental protection against the humidity often found in our local climate.

Wiring & Application Guide

To use the Electrapac 1N4736A as a voltage regulator, it must be installed in Reverse Bias (the side with the black band connected to the positive rail) with a series resistor (R_s):

1. Cathode (Black Band): Connect towards the higher positive voltage.

2. Anode: Connect to the negative/ground rail.

Pro-Tip: If you are using this diode to protect a 5V sensor pin from a 12V spike, a 6.8V Zener acts as a "safety valve." However, for absolute 5V protection, you might prefer a 5.1V Zener. The 6.8V version is best suited for 6V systems or as a high-limit clamp.

Primary Applications

• Voltage Regulation: Creating a steady 6.8V supply from a 9V or 12V battery.

• Switching Power Supplies: Used in feedback loops to maintain output stability.

• Waveform Clipping: Shaping signals in audio or radio frequency circuits.

• Microcontroller Protection: Clamping input signals to prevent them from exceeding 6.8V.

• Reference Voltage: Providing a "benchmark" voltage for comparator circuits.

Why Shop at Electrapac?

We supply the 1N4736A Zener Diode in a Pack of 5, ensuring you always have spares for your prototyping and repair needs. Visit us at for the discrete components that keep your circuits safe and stable.