The **ALR-014-R** is a specific electronic component, typically identified as a **Radial Lead Varistor** (Metal Oxide Varistor or MOV) manufactured by companies like Littelfuse or specialized power component vendors. These parts are designed to protect circuits against high-voltage transients (surges) by clamping the voltage to a safe level. --- ### Technical Specifications Below are the typical electronic characteristics for a part in this series: | Parameter | Specification (Typical) | | :--- | :--- | | **Component Type** | Metal Oxide Varistor (MOV) | | **Package / Case** | Radial Disc (Through-hole) | | **Varistor Voltage** | ~14V to 22V (depending on series suffix) | | **Maximum AC Voltage** | 10V - 14V RMS | | **Maximum DC Voltage** | 14V - 18V | | **Clamping Voltage** | ~30V - 43V | | **Peak Surge Current** | 100A - 500A (8/20µs pulse) | | **Operating Temperature** | -40°C to +85°C | --- ### Key Electronic Functions 1. **Voltage Clamping:** The ALR-014-R acts as a voltage-sensitive resistor. When the voltage exceeds its threshold, its resistance drops drastically, shunting the excess current to ground or away from sensitive components. 2. **Surge Suppression:** It is specifically engineered to handle brief, high-energy spikes caused by lightning, inductive load switching, or electrostatic discharge (ESD). 3. **Bidirectional Protection:** As a varistor, it provides protection for both the positive and negative swings of an AC cycle or transient pulse. ### Common Applications * **Low Voltage DC Power Supplies:** Protecting sensors and microcontrollers. * **Automotive Electronics:** Safeguarding 12V systems from "load dump" transients. * **Telecommunications:** Protection for signal lines. * **Consumer Electronics:** Power entry protection for handheld devices. --- ### Circuit Symbol and Placement In a schematic, the ALR-014-R is placed **in parallel** with the load it is intended to protect. ```circuit [Line/Input] -----------+----------- [Protected Load] | [ALR-014-R] | [Neutral/GND] ----------+----------- [GND] ```