The **Tripp Lite INTERNET350U** is an ultra-compact, standby Uninterruptible Power Supply (UPS). It is designed to provide battery backup and surge protection for small electronics like PCs, routers, and modems. Below is a breakdown of its primary electronic components and technical specifications. --- ### 1. Internal Electronic Components The device operates using a combination of power conversion and protection circuitry: | Component | Function | | :--- | :--- | | **Sealed Lead Acid (SLA) Battery** | Typically a 12V DC battery that stores energy to power devices during an outage. | | **Inverter** | Converts the 12V DC battery power into 120V AC power when the main utility power fails. | | **Switching Circuitry** | Detects power loss and switches the load from utility power to battery power (Transfer Time: ~2-6ms). | | **Surge Suppression (MOVs)** | Metal Oxide Varistors (MOVs) absorb high-voltage spikes to protect connected equipment. | | **Transformer** | Steps down voltage for internal logic circuits and battery charging. | | **HID-Compliant USB Port** | Allows the UPS to communicate with a computer for automatic shutdowns via USB. | --- ### 2. Technical Specifications | Feature | Specification | | :--- | :--- | | **Output Capacity** | 350 VA / 180 Watts | | **Nominal Output** | 120V AC (Simulated Sine Wave on battery) | | **Outlets** | 6 Total (3 Battery Backup + Surge, 3 Surge Only) | | **Waveform Type** | PWM (Pulse Width Modulated) Sine Wave | | **Circuit Breaker** | 7A resettable breaker | --- ### 3. Protection & Connectivity Features * **EMI/RFI Filtering:** The electronic board includes line noise filtering to prevent electromagnetic interference from affecting the performance of connected electronics. * **RJ11 Jacks:** Includes a single-line phone/DSL surge protection bridge to prevent "backdoor" surges through phone lines. * **LED Indicators:** Green LEDs indicate the status of AC input and "Check Battery" conditions. ### 4. Circuit Diagram Overview (Simplified) ```mermaid graph TD A[AC Wall Input] --> B{Transfer Switch} B -- Normal Mode --> C[Surge Filter & Outlets] B -- Power Failure --> D[12V SLA Battery] D --> E[DC-to-AC Inverter] E --> C C --> F[Connected Equipment] ``` ---