## Overview of the ACTE-111-R The **ACTE-111-R** is a high-performance, automotive-grade power relay manufactured by **Panasonic**. It belongs to the **ACTE series (Twin Relay type)**, specifically designed for reversing motor control and high-current applications in compact environments. --- ### 1. Key Technical Specifications The following table outlines the core electronic and physical characteristics of the ACTE-111-R: | Feature | Specification | | :--- | :--- | | **Relay Type** | Twin (Dual) Automotive Relay | | **Contact Arrangement** | 1 Form C × 2 (H-Bridge configuration) | | **Nominal Coil Voltage** | 12V DC | | **Contact Rating (Resistive)** | 20A at 14V DC | | **Maximum Carrying Current** | 30A (for 2 minutes) | | **Coil Resistance** | 180 $\Omega$ (approx. 800mW power consumption) | | **Mounting Type** | PCB Through-hole | | **Dimensions** | Approx. 13.6 x 12.0 x 13.5 mm | --- ### 2. Internal Structure and Functionality The "Twin" designation means that two independent relays are housed within a single small plastic casing. This is strategically designed for **H-Bridge circuits**, which are used to control the direction of DC motors. * **Integrated Design:** By combining two relays, it saves significant board space (approx. 50% less space compared to using two separate relays). * **Contact Material:** Usually uses **Silver Alloy (Cadmium-free)** to handle high inrush currents and prevent welding. * **Thermal Resistance:** Built with a high heat-resistant molded base to withstand the harsh temperatures of an engine compartment. --- ### 3. Common Applications Due to its robust power handling and compact form factor, the ACTE-111-R is primarily used in automotive body electronics: 1. **Power Windows:** Controlling the Up/Down movement of glass motors. 2. **Central Door Locking:** Managing the lock/unlock actuators. 3. **Power Seats:** Adjusting position motors. 4. **Sunroofs:** Controlling the sliding and tilting mechanisms. --- ### 4. Circuit Implementation Example In a standard reversing motor application, the ACTE-111-R is wired so that one relay controls the "Forward" path and the other controls the "Reverse" path. ```text [ +12V ] | +-----+-----+ | | [Relay A] [Relay B] | | +--[Motor]--+ | | [GND] [GND] ``` ---