--- product_id: 600021757 title: "40A Inline Circuit Breaker Resettable 12-24V DC Manual Reset Fuse Holder 3-15 AWG Overload Protection for Car Audio Sound Amplifier System RV Marine Boat Truck Solar Inverter" brand: "nilight" price: "¥3520" currency: JPY in_stock: true reviews_count: 9 category: "Nilight" url: https://www.desertcart.jp/products/600021757-40a-inline-circuit-breaker-resettable-12-24v-dc-manual-reset store_origin: JP region: Japan --- # 40A high current rating Water-resistant cover 12-24V DC compatibility 40A Inline Circuit Breaker Resettable 12-24V DC Manual Reset Fuse Holder 3-15 AWG Overload Protection for Car Audio Sound Amplifier System RV Marine Boat Truck Solar Inverter **Brand:** nilight **Price:** ¥3520 **Availability:** ✅ In Stock ## Summary > ⚡ Reset, Protect, Repeat — Power up your ride with Nilight’s unstoppable circuit breaker! ## Quick Answers - **What is this?** 40A Inline Circuit Breaker Resettable 12-24V DC Manual Reset Fuse Holder 3-15 AWG Overload Protection for Car Audio Sound Amplifier System RV Marine Boat Truck Solar Inverter by nilight - **How much does it cost?** ¥3520 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/600021757-40a-inline-circuit-breaker-resettable-12-24v-dc-manual-reset) ## Best For - nilight enthusiasts ## Why This Product - Trusted nilight brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Manual Reset:** Push-button reset eliminates fuse replacements and doubles as a kill switch for ultimate control. - • **Built to Brave the Elements:** Waterproof cover and alloy construction ensure durability under extreme temperatures and moisture. - • **Robust 40A Overload Protection:** Safeguards your car audio, marine, and RV systems from damaging current surges with precision. - • **Space-Saving, Panel-Mount Design:** Compact footprint fits perfectly near batteries or on firewalls, optimizing your installation space. - • **Universal Fit for 3-15 AWG Wires:** Seamlessly integrates with a wide range of vehicle and marine electrical setups without hassle. ## Overview The Nilight 40A Inline Circuit Breaker is a rugged, manual-reset fuse holder designed for 12-24V DC systems. Featuring a high 40-amp rating, water-resistant cover, and durable alloy construction, it protects automotive, marine, and RV electrical circuits from overload damage. Its push-button reset eliminates fuse replacements and doubles as a kill switch, while its compact, panel-mount design fits 3-15 AWG wires, making it an essential upgrade for reliable, maintenance-free power protection. ## Description Product description Widely used in household and commercial appliances, transportation, marine, telecommunications, power strips, audio-visual, medical, and power supplies. Nilight 40A car audio fuse holder Ampere range: 40A; Voltage: 12V-24V DC; Size: 110mm/4" (L) x 42mm/1.65" (W) x 39mm/1.54" (H) Work Temperature: -40℃ to 85℃ (-40℉ to 185℉) Notes 1. Please choose the right current circuit breaker base on your requirements. 2. Please correctly push the button to avoid damage the circuit breaker. 3. Please assure the products work on right working temperature to avoid too heat then stop work. FEATURE Manual reset circuit breaker Marine Circuit Breakers rated at 40A. Operating voltage could be 12-24V DC. The button will pop up when the circuit is overload, push to reset it. Alloy materials Made of alloy materials, good conductivity, strong temperature. Nilight fuse holders 100% pass professional electrical performance test and aging test Water resistant cover Come with transparent waterproof covers to prevent moisture or dust invasion. More durable and reliable. Pressure resistance Nilight circuit breaker is sturdy enough for long term use by being made of burr-free bakelite housing and metal shaft. CAR AUDIO FUSE HOLDER The circuit breaker can protect car audio, low-voltage, and high-current electrical equipment from current overload damage. Allow to charge or maintain the battery without having to disconnect all the wires. When the circuit current exceeds the rated current, the fuse burns out and automatically disconnects, which can well protect the electrical appliances. Unique Push Button Reset can also be used as a Kill Switch PRODUCT PARAMETER SOLUTION A Fit the wire of 3-15 AWG( inner core) SOLUTION B Fit the wire of 0-10 AWG( No inner core) Typically used in auxiliary and accessory circuits for trucks, buses, RV's, ATV winches and marine applications. Also used in battery charges and DC sound amplifier system, vehicle audio video system, boat, marine and all 12V-24V systems. Related Product Circuit Breaker 6 Way Fuse Block 12 Way Fuse Block 4-type Fuse Taps In-line fuse holder Maxi APX blade fuse Terminals Circuit Breaker Review: (thumbs up) - I love that I don't have to ever change a fuse. All car fuses should be breakers. Awesome. Review: Slim and functional - Perfect..space saver. Install near battery PERFECT FOR DC TO DC CHARGERS. ( add 10 am;s to your charger rating) ## Features - Manual reset circuit breaker: Manual reset button, no need to replace the inline fuse. When the circuit current exceeds the rated current, the fuse burns out and automatically disconnects, which can well protect the electrical appliances. The unique push button reset can also be used as a kill switch. - Protect your system: The circuit breaker can protect car audio, low-voltage, and high-current electrical equipment from current overload damage. Allow to charge or maintain the battery without having to disconnect all the wires. - High quality: Car audio inline circuit breaker fuse made of alloy materials, water resistant cover, good conductivity, strong temperature and pressure resistance. Nilight car audio fuse holders 100% pass professional electrical performance test and aging test. - Application: The waterproof 12v circuit breaker is surface Mount, mount on panel or firewall. Typically used in auxiliary and accessory circuits for trucks, buses, RV's, ATV winches and marine applications. Also used in battery charges and DC sound amplifier system, vehicle audio video system, boat, marine and all 12V-24V systems. - Package Include: 1 x 12V-24V DC 40A Auto Audio Circuit Breaker Reset Fuse holder ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CFYBVG55 | | Best Sellers Rank | #26,464 in Automotive ( See Top 100 in Automotive ) #56 in Automotive Replacement Fuse Holders | | Brand | Nilight | | Brand Name | Nilight | | Circuit Breaker Type | Standard | | Current Rating | 40 Amps | | Customer Reviews | 4.2 out of 5 stars 62 Reviews | | Global Trade Identification Number | 00840323905558 | | Included Components | 1PC 40A Circuit Breaker | | Manufacturer | Nilight | | Model | 50124R | | Mounting Type | Screw Mount | | Number Of Poles | 2 | | Number of Poles | 2 | | Part Number | 50124R | | Smart Home Compatibility | Not Smart Home Compatible | | UPC | 840323905558 | | Unit Count | 1.0 Count | | Voltage | 24 Volts | ## Product Details - **Brand:** Nilight - **Circuit Breaker Type:** Standard - **Current Rating:** 40 Amps - **Mounting Type:** Screw Mount - **Number Of Poles:** 2 ## Images ![40A Inline Circuit Breaker Resettable 12-24V DC Manual Reset Fuse Holder 3-15 AWG Overload Protection for Car Audio Sound Amplifier System RV Marine Boat Truck Solar Inverter - Image 1](https://m.media-amazon.com/images/I/81gcTiQ05gL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ (thumbs up) *by D***. on March 22, 2026* I love that I don't have to ever change a fuse. All car fuses should be breakers. Awesome. ### ⭐⭐⭐⭐⭐ Slim and functional *by C***G on August 26, 2025* Perfect..space saver. Install near battery PERFECT FOR DC TO DC CHARGERS. ( add 10 am;s to your charger rating) ### ⭐⭐⭐⭐⭐ 40 amps *by D***. on November 4, 2024* In line circuit breaker that also works well as an on/off switch. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/600021757-40a-inline-circuit-breaker-resettable-12-24v-dc-manual-reset](https://www.desertcart.jp/products/600021757-40a-inline-circuit-breaker-resettable-12-24v-dc-manual-reset) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-06-20*