Can electricity flow in both directions through this circuit breaker - charge and discharge?

It is basically an inline fuse. I have mine with the source being my panels and a fuse placed before going into my charge controller. I am running one unit on both + and - of the solar panel before it goes into charge controller and I also run one unit on both + and - as it exits my charge controller going to the battery bank. using 4 units total. Which direction you wish to direct your electrical current should not mater, if the amps surge it should trip the fuse. Just put it in front of the unit you are trying to protect. In my case protecting solar charger from solar panels before going into solar charge controller and from battery bank before going in to solar charge controller.

Will 3/8"lugs work on this

Yes, use a star washer to secure the larger lug.

what size is recommended for a 3500 watt set up?

Ryan, I do not know if you are talking about pulling 3500 watts DC or if you are connecting and inverter 3500 watt from DC. If you are talking about use a 3500 ac watts inverter, I need to know at whar voltage ia the DC in for the inverter. The amps at 12v , 24v , 36v and 48v are differents, in the inveeter, at higher to increase from DC to AC in the inverter, higher will be the amps it pull from the batteries that can be in serie for those DC voltage. If you are pulling 3500 watts in DC from batteries, just calculate an average of 100 watts per amp. 3500 watts can be 350 amps.

I am looking for a drawing of the hole pattern to incorporate the parts in an assemlby kit. do you have a step file or such of the part.

L 3" x W 1 3/4" H 1 1/4" mounting holes are 1 1/2" diagonal. Make sure you read other people questions just not the reviews. Cheers

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

3 Pack 300A Circuit Breaker with Manual Reset Fuse Holder for Car Audio Marine Boat Stereo Switch, with Wire Lugs Copper Washer

Product ID: 401633626

Details

Brand
Hamolar
Circuit breaker type
Standard
Current rating
300 Amps
Mounting type
Panel Mount
Product dimensions
43D x 49W x

⚡300A high current rating

🔄Manual push-button reset

🌡️-32°C to 82°C wide temp range

R1226

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered 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 South Africa.

Secure transaction

Description

🔋 Power up with confidence—reset, protect, and dominate your drive or voyage!

BUILT TO ENDURE - Engineered for extreme conditions from freezing cold to scorching heat (-32°C to 82°C).
MULTI USE KILL SWITCH - Dual-function push button acts as a reliable kill switch for quick, safe system shutdown.
RESET DONT REPLACE - Forget fuse replacements—just push the reset button and get back on the road or water instantly.
ULTIMATE OVERLOAD PROTECTION - Safeguard your amps and motors from damaging power surges with 300A capacity.
VERSATILE VOLTAGE COMPATIBILITY - Works seamlessly across 12V to 48V DC systems, perfect for cars, boats, RVs, and more.

The Hamolar 3 Pack 300A Circuit Breaker with Manual Reset Fuse Holder offers robust protection for automotive and marine electrical systems. Designed for 12-48V DC applications, it prevents damage from overloads and short circuits with a high 300A rating. Featuring a convenient push-button reset that doubles as a kill switch, it eliminates the hassle of fuse replacements. Built to withstand extreme temperatures (-32°C to 82°C), this panel-mount breaker includes wire lugs and copper washers for easy installation, making it an essential upgrade for car audio, boats, RVs, and more.

Specifications

ASIN	B095YZN677
ASIN	B095YZN677
Best Sellers Rank	#66,338 in Automotive ( See Top 100 in Automotive ) #55 in Car Circuit Breaker Switches
Brand Name	Hamolar
Circuit Breaker Type	Standard
Current Rating	300 Amps
Customer Reviews	4.5 4.5 out of 5 stars (1,886)
Customer reviews	4.5 4.5 out of 5 stars (1,886)
Date First Available	13 June 2021
Item Dimensions D x W x H	43D x 49W x 43H millimeters
Item Weight	110 Grams
Item model number	CB5-300A
Manufacturer	Hamolar
Manufacturer	Hamolar
Model	CB5-300A
Mounting Type	Panel Mount
Number of Items	3
Number of Poles	1
Part Number	CB5-300A
Product Dimensions	7.39 x 4.9 x 4.39 cm; 110 g
UPC	721703426408
Voltage	12 Volts, 24 Volts

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

R1226

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered 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 South Africa.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

View all Trustpilot reviews