The **F2AP-H2-R** is a specific model within the **F2AP series of slim power relays**, typically manufactured by Fujitsu (Takamisawa). These components are widely used in industrial automation, PLC outputs, and household appliances due to their high power capacity relative to their small footprint. --- ## 1. Technical Specifications The "H2" designation usually refers to the coil sensitivity or voltage rating, and "R" often indicates specific packaging or contact material variations. | Feature | Specification | | :--- | :--- | | **Contact Arrangement** | 1 Form A (SPST-NO - Normally Open) | | **Rated Load (Resistive)** | 5A at 250VAC / 30VDC | | **Max. Switching Power** | 1,250 VA / 150 W | | **Max. Switching Voltage** | 277 VAC / 125 VDC | | **Dielectric Strength** | 4,000 VAC (between coil and contacts) | | **Mounting Type** | Through-hole PCB | | **Dimension Profile** | Slim/Flat (approx. 5.0mm width) | --- ## 2. Key Electronic Components & Internal Structure The F2AP-H2-R operates using electromagnetic induction. Below are its primary electronic elements: ### A. The Coil (Input Side) * **Function:** Converts electrical energy into a magnetic field. * **H2 Specification:** This typically denotes a high-sensitivity coil, requiring lower power to actuate compared to standard relays. * **Protection:** Often used with a flyback diode (external) to prevent voltage spikes when the coil is de-energized. ### B. The Contacts (Output Side) * **Material:** Usually Silver Tin Oxide ($AgSnO_2$). This material is chosen for its excellent anti-welding properties and durability against electrical arcs. * **Action:** Physical movement of the armature closes the gap between the stationary and movable contacts. ### C. Insulation System * **Reinforced Insulation:** The F2AP series is designed with high clearance and creepage distances to ensure that high voltage on the load side does not leak into the low-voltage control circuit. --- ## 3. Application Use-Cases Because of its slim profile, the F2AP-H2-R is ideal for high-density mounting: 1. **Programmable Logic Controllers (PLCs):** Used as the physical switch for output modules. 2. **Temperature Controllers:** Activating heating elements. 3. **Interface Modules:** Bridging the gap between low-power microcontrollers (like Arduinos or ESP32s) and mains-powered devices. 4. **Smart Plugs:** Its small size allows it to fit inside wall-mounted enclosures. --- ## 4. Typical Connection Diagram ```text [Control Side] [Load Side] (VCC) o----(Coil)----o (GND/Transistor) | | (Magnetic Force) v (Line) o----/ .----o (Device/Load) (Contact) ``` ---