The **ATO2BP** (also commonly referred to as the **ATO-2BP**) is a specific type of **Automotive Blade Fuse Tap** (or "Add-a-Circuit" adapter) designed for use with standard **ATO/ATC (Regular)** size blade fuses. It allows for the safe installation of additional 12V accessories without cutting or splicing the original vehicle wiring. --- ### 1. Key Components and Design The ATO2BP consists of several integrated electronic and mechanical parts: | Component | Description | | :--- | :--- | | **Male Terminal Pins** | Two metal prongs that plug directly into the vehicle's original fuse box slot. | | **Dual Fuse Slots** | One slot protects the original circuit; the second slot protects the new accessory circuit. | | **Butt Connector** | A pre-insulated crimp connector used to attach the wire of the new device. | | **16 AWG Wire** | Typically features high-temperature UL-rated insulation (often red) for the new circuit branch. | | **Molded Body** | Made of heat-resistant plastic (PA66 or similar) to withstand engine bay temperatures. | --- ### 2. Technical Specifications Understanding the limits of the ATO2BP is critical for circuit safety: * **Fuse Type Compatibility:** Standard ATO / ATC (Regular size). * **Voltage Rating:** Typically up to **32V DC** (Standard for automotive 12V/24V systems). * **Current Rating:** Usually rated for a maximum of **20A to 30A** total, with the secondary circuit often limited to **10A or 15A**. * **Wire Gauge:** Standard **16 AWG** (American Wire Gauge). --- ### 3. Electronic Functionality The ATO2BP acts as a **parallel circuit splitter**. 1. **Isolation:** By using two separate fuses, if your new accessory (e.g., a dashcam) shorts out, it will only blow its own fuse. The original vehicle circuit (e.g., the radio or wipers) remains functional. 2. **Protection:** It ensures that the power is drawn from the "hot" side of the fuse box, passing through the fuse before reaching the electronic device. 3. **Non-Invasive Connection:** It preserves the physical integrity of the OEM (Original Equipment Manufacturer) wiring harness, preventing "vampire" draws or corrosion associated with traditional wire taps. --- ### 4. Common Use Cases Electronics enthusiasts and automotive technicians use the ATO2BP for: * **Dash Cameras:** Hardwiring for "Parking Mode." * **LED Lighting:** Adding interior ambient lighting or exterior strips. * **GPS Trackers:** Providing constant or ignition-switched power. * **Auxiliary Gauges:** Powering boost or temp gauges in performance cars. ---