VICTRON ENERGY Victron Mega-Fuse 125A/58V High-Current DC Protection | For 48V Systems | Single Piece The Victron Mega-Fuse 125A/58V is a crucial component for safeguarding your high-current DC electrical systems. Manufactured by Victron Energy, a trusted name in power electronics, this MEGA fuse provides essential overcurrent and short-circuit protection for valuable equipment. Rated at 125 Amps and 58 Volts, this fuse is specifically designed for robust performance in 48V DC applications, including solar power systems, marine setups, and off-grid installations. Its bolt-down design ensures a secure connection within compatible MEGA fuse holders. ESSENTIAL PROTECTION: Safeguards DC circuits from damaging overcurrents and short circuits. Key Features ▶ High Current Rating — Provides reliable 125A overcurrent protection for demanding circuits. ▶ 58V DC Voltage Rating — Optimised for 48V DC systems, offering broad compatibility for various applications. ▶ Robust Construction — Built with durable materials to withstand harsh electrical environments. ▶ Genuine Victron Energy Product — Ensures quality, reliability, and seamless integration with other Victron components. ▶ Slow-Blow Characteristic — Designed to prevent nuisance tripping from temporary inrush currents. Technical Specifications Parameter Value Manufacturer Victron Energy Product Type MEGA Fuse Current Rating 125A Voltage Rating 58V DC MPN (Manufacturer Part Number) CIP137125010 SKU 792-CIP137125010 Quantity 1 Piece Approximate Voltage Drop 90 mV Cold Resistance 0.4 mΩ Circuit Protection Essentials Fuses are critical safety devices in any electrical system, designed to protect wiring and components from damage due to excessive current. The Victron Mega-Fuse 125A/58V acts as a sacrificial component, melting and breaking the circuit when current exceeds its rated capacity. This prevents overheating, potential fires, and damage to expensive equipment such as inverters, charge controllers, and battery banks. Its 58V rating makes it highly suitable for 48V battery systems, a common voltage in larger solar and off-grid installations. While rated for 58V, it can also be safely used in lower voltage DC systems (e.g., 12V, 24V) where a 125A current rating is appropriate, providing versatile protection across various DC applications. Typical Applications Application Description Solar Power Systems Protecting inverters, charge controllers, and battery banks in 48V solar installations. Marine & RV Safeguarding high-power electrical systems in boats, caravans, and motorhomes. Off-Grid Installations Essential safety for DC loads and sources in remote power setups. DC Distribution Systems Used within Victron Lynx Distributors and other compatible MEGA fuse holders. Built-In Protection Functions The Victron Mega-Fuse 125A/58V is engineered to provide critical safety functions for your electrical system: ▶ Overcurrent Protection — Automatically interrupts the circuit when current exceeds 125A, preventing damage to connected components. ▶ Short Circuit Protection — Offers rapid response to short-circuit conditions, isolating the fault and protecting the system. ▶ System Safety Enhancement — Contributes to the overall integrity and safety of your DC power installation. Common Questions What is a MEGA fuse primarily used for? MEGA fuses like this Victron 125A/58V model are designed for high-current DC circuit protection, commonly found in solar, marine, RV, and automotive applications to protect major components such as inverters, battery banks, and large DC loads. How do I select the correct fuse rating for my system? The fuse rating should be chosen to protect the wire and the device it's connected to. Generally, the fuse should be sized to match or slightly exceed the maximum continuous current draw of the circuit, ensuring it is always below the ampacity (current carrying capacity) of the cable. Consult your equipment manuals and wiring standards for precise guidance. Can this 58V fuse be used in 12V or 24V systems? Yes, while rated for a maximum of 58V, this fuse can be safely used in lower voltage DC systems such as 12V, 24V, or 36V, provided the 125A current rating is appropriate for your specific circuit and components. The 58V rating indicates its maximum voltage capability, not a minimum. Installation Notes Always disconnect all power sources before attempting any electrical installation or maintenance. Ensure the fuse holder you are using is specifically designed for MEGA fuses and is rated for the appropriate current and voltage. Install the fuse in a dry, protected environment, away from direct moisture or excessive heat. Verify that the fuse rating (125A) is correctly matched to the circuit's requirements and cable gauge. For complex installations, it is recommended to consult a qualified electrician or solar installer. Before You Buy Confirm the required current rating (Amps) for your specific application to ensure adequate protection. Check the voltage compatibility of your system; this fuse is rated for up to 58V DC. Ensure you have a compatible MEGA fuse holder for proper and safe installation. Consider the overall design of your DC distribution system and any other required protective devices. Always verify product specifications and compatibility with your specific system requirements before purchase. Consult a qualified electrician for installation guidance.
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