## Technical Overview of the W5TS-1A4-R The **W5TS-1A4-R** is a specific electronic component manufactured by **Omron**. It belongs to the category of **Low Profile Power Relays**, specifically designed for PCB (Printed Circuit Board) mounting. It is widely used in power management and switching applications due to its high capacity and compact footprint. --- ### 1. Key Technical Specifications Below are the primary electronic characteristics of the W5TS-1A4-R: | Feature | Specification | | :--- | :--- | | **Contact Form** | SPST-NO (1 Form A) | | **Rated Load** | 35A at 250 VAC / 30 VDC | | **Maximum Switching Voltage** | 250 VAC | | **Maximum Switching Current** | 35 A | | **Coil Voltage (Nominal)** | Typically 12VDC or 24VDC (varies by sub-model) | | **Contact Resistance** | 100 mΩ max. | | **Dielectric Strength** | 5,000 VAC (between coil and contacts) | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Major Electronic Components & Design The W5TS-1A4-R consists of several internal electronic and mechanical parts that allow it to function as an electrically operated switch: * **Electromagnetic Coil:** The control part of the relay. When current flows through the coil, it creates a magnetic field that pulls the armature to close the contacts. * **Stationary & Movable Contacts:** These are usually made of **Silver Alloy (Ag-alloy)** to handle high currents (up to 35A) while resisting oxidation and arcing. * **Return Spring:** Ensures that the contacts return to their original "Normally Open" (NO) state once the coil is de-energized. * **Insulation System:** Designed with high dielectric strength to ensure that high voltage on the load side does not leak into the low-voltage control side (coil). --- ### 3. Pin Configuration and Mounting This relay is designed for **Through-Hole Mounting** on a PCB. The pinout typically includes: 1. **Coil Pins (2):** Connect to the control circuit (e.g., a microcontroller output via a transistor). 2. **Load/Contact Pins (2):** Connect to the high-power device you wish to switch. --- ### 4. Typical Applications Because it can handle high currents (35A), it is found in: * **Inverters:** For solar power systems or UPS units. * **EV Charging Stations:** Switching the AC power to the vehicle. * **HVAC Systems:** Controlling heavy motors or heaters. * **Smart Home Appliances:** Power control for ovens or washing machines.