The **W2SP-222-R/UL** is a high-performance, UL-recognized component typically associated with **Weller** (part of Apex Tool Group) or similar industrial thermal technology providers. It is specifically a **Replacement Heating Element** designed for soldering and desoldering stations. --- ### 1. Key Technical Specifications The "W2SP" series is engineered for high thermal efficiency and rapid recovery. Below are the typical technical parameters: | Feature | Specification | | :--- | :--- | | **Component Type** | Soldering Iron Heating Element | | **Voltage** | 24V AC (Standard for safety-isolated stations) | | **Power Output** | 60W - 80W (depending on the specific station pairing) | | **Material** | Ceramic heater with integrated sensor | | **Compliance** | UL Recognized (E-file compliant) | | **Lead Finish** | RoHS Compliant (R-suffix indicates lead-free/RoHS) | --- ### 2. Electronic Composition The device consists of three primary internal electronic sections: 1. **Resistive Heating Coil:** A high-density wire or ceramic-embedded element that converts electrical energy into thermal energy. 2. **Internal Thermocouple/Sensor:** A built-in sensor (usually Type K or a PT-style resistive sensor) that provides real-time temperature feedback to the base station's PID controller. 3. **Connection Interface:** A multi-pin connector (usually 6-pin or 7-pin configuration) that separates the power lines from the sensitive sensor lines to prevent electrical interference. --- ### 3. Usage & Compatibility This part is a critical spare for maintenance in industrial electronics assembly. * **Primary Tool:** Used in the **WSP80** or **WP80** soldering pencils. * **Station Compatibility:** Works with the **Silver Line** series stations (e.g., WD1, WD2, WSD81). * **Application:** Ideal for high-mass soldering joints where "thermal recovery" (the speed at which the tip returns to temperature after touching a cold joint) is vital. --- ### 4. Installation Safety Note Because this is a **UL-Recognized** component, it must be installed according to specific safety guidelines: * **ESD Safety:** The element must be grounded to prevent Electrostatic Discharge from damaging sensitive CMOS components on the PCB being soldered. * **Calibration:** After replacing the W2SP-222-R/UL, it is recommended to recalibrate the station using a digital thermometer to ensure the tip temperature matches the display. ---