The **MH36FAD-R** is an electronic component primarily classified as a **Hall Effect Latch Sensor**. It is frequently used in brushless DC (BLDC) motor applications and position sensing systems where detecting the polarity of a magnetic field is required. --- ### 1. Key Technical Specifications Below are the primary electrical characteristics of the MH36FAD-R: | Parameter | Description | Typical Value | | :--- | :--- | :--- | | **Supply Voltage ($V_{DD}$)** | Operating range | 3.0V to 24V | | **Output Current ($I_{OUT}$)** | Continuous sink current | 25mA | | **Operating Temp Range** | Thermal endurance | -40°C to +125°C | | **Magnetic Type** | Latching | North/South Alternating | | **Package Type** | Surface Mount / Through Hole | SOT-23 or TO-92S | --- ### 2. Functional Principles The MH36FAD-R operates based on the **Hall Effect** principle. As a "Latch" type sensor, it behaves as follows: * **South Pole (S):** When a strong South magnetic pole is brought near the branded side of the chip, the output turns **ON** (Logic Low). * **North Pole (N):** The output remains ON even if the South pole is removed. It only turns **OFF** (Logic High) when a North magnetic pole is applied. * **Memory:** This "latching" behavior means it remembers its state until it sees an opposite magnetic field. --- ### 3. Pin Configuration For the common **SOT-23** package (Surface Mount), the pinout is typically defined as: 1. **VDD:** Positive power supply input. 2. **OUT:** Open-drain output (requires a pull-up resistor). 3. **GND:** Ground connection. --- ### 4. Common Applications Due to its high sensitivity and wide voltage range, it is found in: * **BLDC Motors:** Sensing the rotor position to time the phase switching (commutation). * **Speed Sensing:** Counting revolutions in fans or industrial equipment. * **Magnetic Encoders:** Converting rotary motion into digital pulses. * **Proximity Switches:** Non-contact limit switches for automated machinery. --- ### 5. Circuit Design Tip Since the MH36FAD-R features an **Open-Drain Output**, you must connect a **Pull-up Resistor** (typically 10kΩ) between the `OUT` pin and `VDD`. Without this resistor, the output will not toggle between high and low voltage levels correctly.