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???

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

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

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.

None of the posts are labeled. Which one is the on switch?

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 .

why is his thing getting so hot?

Give me some background info, how many amps drawn ,voltage and application

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Max Peak Instant Current 300A Heavy Duty Solenoid Relay Nickel-Plating for Golf Carts, Winch, Marine 12VDC

Product ID: 68803701

Details

Connector Type
Screw
Contact Material
Copper
Contact Type
Normally Open
Current Rating
300 A
Mounting Type
2 hole mount

⚡300A max transient current

🔌12V coil with 14Ω resistance

🔩Nickel-plated rust-resistant cover

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Description

⚡ Start Strong, Stay Reliable – Power Your Ride with Confidence!

BUILT TO LAST - Nickel-plated cover ensures corrosion resistance and a sleek, professional finish
COOL UNDER PRESSURE - Designed for intermittent use with recommended 5-minute hold and cool-down cycles
POWER THROUGH PEAKS - Handles up to 300A transient current for instant heavy-duty starts
PLUG PLAY COMPATIBILITY - Direct replacement for multiple OEM solenoids, perfect for golf carts, winches, and marine applications
PRECISION COPPER CONTACTS - High-quality copper points for reliable Normally Open switching

The Max Peak Instant Current 300A Heavy Duty Solenoid Relay is a nickel-plated, corrosion-resistant starter solenoid designed for 12V systems. Featuring a robust 300A transient current capacity and precision copper contacts, it ensures reliable performance for golf carts, winches, and marine vehicles. Engineered for intermittent heavy-duty use with a 14Ω coil resistance and easy bracket mounting, it replaces multiple OEM parts for seamless integration.

Specifications

ASIN	B072MZHK48
Best Sellers Rank	#4,421 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Replacement Starter Solenoids
Brand Name	MaySpare
Coil Resistance	14 ohm
Coil Voltage	12 volts
Connector Type	Screw
Contact Current Rating	300 A
Contact Material	Copper
Contact Type	Normally Open
Current Rating	300 A
Customer Reviews	4.3 4.3 out of 5 stars (1,564)
Manufacturer	MaySpare
Minimum Switching Voltage	12 volts_of_direct_current
Mounting Type	2 hole mount flange
Number of Items	1
Operation Mode	Automatic
Part Interchange Info	3635820, 1114208, 1114218, 1114223, 1114534, 1114547,612905
Part Number	CA-JD4T300A
Specification Met	Mayspare Quality Standard
Wattage	10.2 watts

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S$52

Duties & taxes included

In stock

Sold byAmazon SINGAPOREDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to SINGAPORE.

Secure transaction

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Join PRO →

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TrustScore 4.5 | 7,300+ reviews

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