The **22AL-AE3-R** is a specific electronic component, typically categorized as a **Surface Mount Device (SMD) Tactile Switch**. These switches are designed for low-power, momentary signals used in user interface panels. Below is a breakdown of the specifications, physical characteristics, and typical applications for this part. --- ### 1. Technical Specifications The part number follows a standard nomenclature for UTC (Unisonic Technologies Co) or similar electronic hardware manufacturers. | Feature | Specification | | :--- | :--- | | **Component Type** | Tactile Switch (Momentary) | | **Mounting Type** | Surface Mount (SMD / SMT) | | **Circuit Type** | SPST (Single Pole Single Throw) | | **Operating Force** | Typically 160gf to 250gf (Standard tactile feel) | | **Current Rating** | ~50mA | | **Voltage Rating** | 12V DC | | **RoHS Status** | Compliant (Lead-Free) | --- ### 2. Physical Characteristics The "AE3" and "R" suffixes usually denote the physical dimensions and the packaging method. * **Actuator Height:** The "AE3" often refers to a specific stem height (e.g., 3.1mm or 3.5mm), allowing the button to protrude through a device casing. * **Small Footprint:** Designed for high-density PCB layouts. * **Tactile Feedback:** Provides a distinct "click" sound and physical sensation when pressed to confirm to the user that the connection was made. * **Packaging (R):** The "R" suffix generally indicates **Tape & Reel** packaging, which is optimized for automated pick-and-place assembly lines. --- ### 3. Pinout and Circuitry The device operates as a **Normally Open (NO)** switch. 1. **Resting State:** The circuit is open; no current flows. 2. **Actuated State:** When the button is pressed, the internal metal dome collapses, connecting the input and output terminals. 3. **Release:** The dome springs back, breaking the connection and returning the button to its original position. --- ### 4. Common Applications Due to its small size and reliability, the 22AL-AE3-R is found in: * **Consumer Electronics:** Power buttons on cameras, volume keys on tablets. * **Industrial:** Reset switches on embedded controllers. * **Computing:** Keyboards, mice, and peripheral interface buttons. * **Home Automation:** Smart light switches and thermostat control panels. ---