MC4 Inline Fuse Connector — Crimp Style, IP67 Waterproof Category: Solar PV Connectors • Interface: MC4 Style • Connection: Crimp • Application: PV String Protection Product Description The MC4 Inline Fuse Connector is designed to provide integrated overcurrent protection directly within solar PV string wiring, serving as a critical link between solar modules and downstream equipment such as inverters, charge controllers, and combiner boxes. Unlike traditional bracket-mounted 10×85 mm fuse holders, this connector incorporates the fuse into an MC4-compatible inline housing using crimped electrical terminations. This approach improves mechanical stability, minimizes contact resistance, and reduces long-term failure risk caused by vibration, thermal cycling, or loose connections. Built for harsh outdoor environments, the connector features UV-resistant materials and an IP67 waterproof rating when properly mated. Its compact inline design supports fast installation, simplified maintenance, and quick fuse replacement—making it ideal for residential, commercial, and utility-scale solar installations requiring reliable, code-conscious protection. Specification Type MC4 Inline Fuse Connector Connection Crimp Compatibility Multi-Contact and other MC4-compatible types Cable Compatibility 2.5mm², 4mm², 6mm² solar PV cable Ingress Rating IP67 (waterproof when mated) Environmental Rating UV resistant; designed for long-term outdoor use Key Features Integrated Fuse Protection: Helps protect PV strings, panels, and inverters from overload currents. Crimp-Terminated Design: Enhances long-term electrical and mechanical stability. MC4-Compatible Interface: Seamlessly integrates with standard solar connector systems. Inline Serviceability: Enables faster fuse access and replacement compared to bracket-style holders. IP67 Waterproof: Sealed against dust and water ingress for outdoor PV environments. UV-Resistant Housing: Withstands prolonged sun exposure and environmental stress. Reliable Conductivity: Maintains consistent electrical contact across temperature cycles. Outdoor-Ready Durability: Engineered for multi-year solar field installations. FAQs What is an MC4 inline fuse connector used for? It provides overcurrent protection directly within the PV string, helping safeguard solar panels and downstream equipment such as inverters and controllers. Is this compatible with standard MC4 systems? Yes. It is designed to mate with Multi-Contact MC4 and other MC4-compatible solar connectors. What cable sizes are supported? Compatible with 2.5mm², 4mm², and 6mm² solar PV cables using the appropriate crimp contacts. Is it suitable for outdoor installations? Yes. With UV-resistant materials and IP67 sealing when mated, it is designed for long-term outdoor solar environments. How does this differ from bracket-style fuse holders? This connector integrates fuse protection into an MC4-style inline housing, reducing installation complexity, improving stability, and simplifying maintenance. Specifications Part Number 4904-1530 Category Electrical connector Connector Type Inline Fuse (MC4-type) Weight 1.0 lb HS Code 8536.90.4000 Cross-Reference: 4904-1530 (MC4-type) Brand Part / Class Notes Stäubli (MC4 original) PV-KST4 / PV-KBT4 (verified) match by spec class Renogy / BougeRV MC4-type class* match by spec class Conversions Tech 4904-1530 UL/CSA listed class · same-day shipping on orders by 2 PM PT · engineering desk support · 5-year warranty Inline Fuse (MC4-type), IP67, PV-wire rated, 1000/1500V class, TUV/UL-class. Fits panels shipping with MC4-type leads (most major manufacturers). Full sizing, crimping and fuse guidance in the Solar Connector & Wiring Guide. *MC4 is a Stäubli product; Stäubli certifies intermating only between its own connectors. CT connectors are MC4-type compatible class - verify per your AHJ and panel warranty terms. Trademarks belong to their owners.
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