--- product_id: 237319413 title: "Max 300A Continuous Duty Solenoid Relay Nickel-Plating For Winch, Marine In Rush 12VDC" brand: "mayspare" price: "FREE" currency: RON in_stock: false reviews_count: 5 url: https://www.desertcart.ro/products/237319413-max-300a-continuous-duty-solenoid-relay-nickel-plating-for-winch store_origin: RO region: Romania --- # 150A Amperage 12V Power Nickel-Plated Durability Max 300A Continuous Duty Solenoid Relay Nickel-Plating For Winch, Marine In Rush 12VDC **Brand:** mayspare **Price:** FREE **Availability:** ❌ Out of Stock ## Summary > ⚙️ Power Up Your Performance! ## Quick Answers - **What is this?** Max 300A Continuous Duty Solenoid Relay Nickel-Plating For Winch, Marine In Rush 12VDC by mayspare - **How much does it cost?** FREE with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/237319413-max-300a-continuous-duty-solenoid-relay-nickel-plating-for-winch) ## Best For - mayspare enthusiasts ## Why This Product - Trusted mayspare brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Operation:** Designed for optimal performance with a 5 sec on, 50 min off cycle to prevent overheating. - • **Unmatched Power:** Experience a robust 150A continuous duty performance, perfect for demanding applications. - • **Efficient Energy Use:** Low 10.2W consumption means you can power up without draining your resources. - • **Rust-Resistant Design:** Crafted with nickel-plating to ensure longevity and shine, even in harsh environments. - • **Versatile Compatibility:** Fits a wide range of models, making it the go-to choice for winches and marine applications. ## Overview The Max 300A Continuous Duty Solenoid Relay is engineered for high-performance applications, featuring a robust 150A capacity and a durable nickel-plated exterior. With a low energy consumption of 10.2W and compatibility across various models, this relay is perfect for winches and marine use, ensuring reliability and efficiency in every operation. ## Description 300A Continuous Duty Solenoid Relay Nickel-Plating For Golf Carts ,Winch, Marine 12V Specifications REPLACES Application THIS SOLENOID IS FOR INDUSTRIAL APPLICATIONS WHERE THE SOLENOID IS BEING ENGAGED FOR LONG PERIODS OF TIME Review: Holds up the the amps needed for hydrolic tilt bed trailer - Replaced old solenoid with a cheaper on, not considering the amperage needed, and learned quickly what I really needed. This is the right tool for the job, holding up to the demand. Priced right and works great. Review: Would recommend - Bought to replace an expensive excavator solenoid and has worked flawlessly for over a year. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B072MZHK48 | | Brand | MaySpare | | Coil Resistance | 14 Ohms | | Coil Voltage | 12 Volts | | Connector Type | Screw | | Connector type | Screw | | Contact Current Rating | 300 Amps | | Contact Material | Copper | | Contact Type | Normally Open | | Contact material | Copper | | Contact type | Normally Open | | Current Rating | 300 Amps | | Current rating | 300 Amps | | Customer Reviews | 4.3 out of 5 stars 1,498 Reviews | | Manufacturer | MaySpare | | Manufacturer Part Number | CA-JD4T300A | | Minimum Switching Voltage | 12 Volts (DC) | | Mounting Type | Boat Mount | | Mounting type | Boat Mount | | Number of Items | 1 | | Operation Mode | Automatic | | Specification Met | Mayspare Quality Standard | | Wattage | 10.2 watts | ## Product Details - **Connector type:** Screw - **Contact material:** Copper - **Contact type:** Normally Open - **Current rating:** 300 Amps - **Mounting type:** Boat Mount ## Images ![Max 300A Continuous Duty Solenoid Relay Nickel-Plating For Winch, Marine In Rush 12VDC - Image 1](https://m.media-amazon.com/images/I/61wOhHtUOhL.jpg) ![Max 300A Continuous Duty Solenoid Relay Nickel-Plating For Winch, Marine In Rush 12VDC - Image 2](https://m.media-amazon.com/images/I/81g60uZwXjL.jpg) ![Max 300A Continuous Duty Solenoid Relay Nickel-Plating For Winch, Marine In Rush 12VDC - Image 3](https://m.media-amazon.com/images/I/71yCt6Cnz4L.jpg) ![Max 300A Continuous Duty Solenoid Relay Nickel-Plating For Winch, Marine In Rush 12VDC - Image 4](https://m.media-amazon.com/images/I/71eHIB24lNL.jpg) ![Max 300A Continuous Duty Solenoid Relay Nickel-Plating For Winch, Marine In Rush 12VDC - Image 5](https://m.media-amazon.com/images/I/71FkR+DqhUL.jpg) ## Questions & Answers **Q: Description says 300a continuous but in the lower info it states note: normally make 80a as working current, need break 5 sec on, 50 min off - why???** A: This is MaySpare Service. The Max Short Time Current can endure 300A; But if u want to keep working for more than one hour without break, the current need be about 80Amp; Otherwise the body of solenoid will be so hot and burned **Q: How many miliamps does it require to activate the solenoid? I want to make sure my momentary push button switch can support activation of this solen** A: I believe the coil resistance is around 14 ohms which would make the current around 900 milliamps. But Rember thr collaspe of the coil during disconnect creates large spikes across a small switch and burn the switch contacts, therefore I would a 1 amp @600 volt despising diode across the solenoid coil to protect your switch contacts. **Q: None of the posts are labeled. Which one is the on switch?** A: This is generally used to power large loads like a starter or like my app. Four bilge blowers. The big posts on the side are battery cable in than wires out to the load. The small posts are power and ground to run the solenoid. Connect one to ground one to the switch. You might want to test the small posts with an ohm meter. Make sure neither is to ground . **Q: why is his thing getting so hot?** A: Give me some background info, how many amps drawn ,voltage and application ## Customer Reviews ### ⭐⭐⭐⭐⭐ Holds up the the amps needed for hydrolic tilt bed trailer *by A***S on 4 August 2026* Replaced old solenoid with a cheaper on, not considering the amperage needed, and learned quickly what I really needed. This is the right tool for the job, holding up to the demand. Priced right and works great. ### ⭐⭐⭐⭐⭐ Would recommend *by J***. on 30 July 2026* Bought to replace an expensive excavator solenoid and has worked flawlessly for over a year. ### ⭐⭐⭐⭐⭐ Looks good thanks *by T***K on 28 August 2026* Looks good have not used it yet thanks come with nuts and everything ## Frequently Bought Together - Max 300A Heavy Duty Solenoid Relay Nickel-Plating for Golf Carts, Winch, Marine in Rush 12VDC - TKDMR 160Pcs Copper Wire Lugs AWG2 4 6 8 10 12 with Heat Shrink Set, 80Pcs Battery Cable Ends Ring Terminals Connectors Tubing Assortment Kit - Max 300A 12 Volt Duty Solenoid Relay 4-Terminal for Golf Carts Heavy Duty Winch Marine in Rush SPST 12VDC 12V Solenoid Relay Nickel-Plating --- ## 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.ro/products/237319413-max-300a-continuous-duty-solenoid-relay-nickel-plating-for-winch](https://www.desertcart.ro/products/237319413-max-300a-continuous-duty-solenoid-relay-nickel-plating-for-winch) --- *Product available on Desertcart Romania* *Store origin: RO* *Last updated: 2026-09-15*