The **MEH28XBA-R** is an electronic component manufactured by **MinebeaMitsumi (NMB)**. It is part of their specialty electromagnetic clutch and brake series, specifically categorized as an **Electromagnetic Micro Brake**. --- ### ## Technical Specifications This component is designed for precise motion control in small-scale electromechanical systems. Below are the primary electronic and physical specifications: | Parameter | Specification | | :--- | :--- | | **Component Type** | Electromagnetic Micro Brake | | **Manufacturer** | MinebeaMitsumi (NMB) | | **Rated Voltage** | 24V DC | | **Static Friction Torque** | ~0.02 - 0.05 Nm (Series Dependent) | | **Response Time** | High-speed engagement/disengagement | | **Mounting Style** | Shaft-mounted or Flange-mounted | | **Typical Application** | Office automation, medical equipment | --- ### ### Key Electronic Characteristics 1. **Electromagnetic Coil:** The core of the unit is a copper wire coil wound into a solenoid. When 24V DC is applied, it generates a magnetic field that pulls an armature plate against a friction surface to stop or hold a load. 2. **Power Consumption:** These units are designed for low power consumption to prevent overheating in enclosed housings like printers or scanners. 3. **Polarity:** Since it is a simple DC coil, polarity usually does not affect the braking function unless the unit includes a built-in diode for flyback protection. 4. **Inductive Load Management:** As an inductive component, the MEH28XBA-R generates a back-EMF (voltage spike) when the power is disconnected. In a circuit, it is recommended to use a **Flyback Diode** (e.g., 1N4007) in parallel with the coil to protect the driving transistors or PLC outputs. --- ### ### Typical Use Cases * **Paper Feed Mechanisms:** Stopping the paper rollers in printers and photocopiers exactly at the sensor trigger. * **Medical Pumps:** Providing a failsafe "hold" state to prevent backflow or unintended movement. * **Security Cameras:** Locking the Pan-Tilt-Zoom (PTZ) position once the desired angle is reached. --- ### ### Installation Note When integrating the MEH28XBA-R, ensure the air gap between the armature and the rotor is set according to the datasheet (typically 0.1mm - 0.2mm). A gap that is too wide will prevent the magnet from engaging, while a gap too small will cause drag and heat.