Would this be able to take a 4awg wire?

Yes, you can use a 4awg wire in your setup. That's what I'm using in my solar battery box. To get the 4awg wire to fit, you have to unscrew the main cap, unscrew the flathead screw to release and remove the red insert, then strip the 4awg wire casing off and from there you will need to cut some of the strands off for it to fix. It worked for me.

Is the circuit supposed to be connected when the arm is up or down? I bought 2 of these and both appear to complete the circuit when the arm is up.

The arm should be down to complete the circuit. If you have a multi meter that checks ohms, run a ohms check in the fuse itself. Up position should show an open circuit.

How many breakers in the package ? Two are pictured.

They are a 2 pack. These are real good quality also.

Not sure, but it is a breaker so I would not think it is. I do have a diode on one that is being used on a 24v to 12v buck converter.

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2 Pack 40A Audio Inline Circuit Breaker Reset Fuse 12V/24V DC, PowMr Reset Fuse Holder 40 amp with Manual Reset for Car Audio, Stereo Switch and Solar Inverter System

2 Pack 40A Audio Inline Circuit Breaker Reset Fuse 12V/24V DC, PowMr Reset Fuse Holder 40 amp with Manual Reset for Car Audio, Stereo Switch and Solar Inverter System

Product ID: 93229017

Details

Brand
Temank
Current Rating
30 Amps
Product Dimensions
1.37"D x x
Circuit Breaker Type
Standard
Mounting Type
Screw Mount

⚡12V/24V dual voltage compatibility

💧Water-resistant rubber boot

🔴40A manual reset button

Description

🔴 Power up with confidence — reset, protect, and never miss a beat!

RELIABLE 40 A PROTECTION - Safeguard your devices with a robust 40-amp manual reset breaker designed for high-current demands.
COST EFFECTIVE DURABLE - Resettable fuse holder saves you money on replacements while delivering long-lasting circuit protection.
WEATHER RESISTANT DESIGN - Rubber boot ensures water protection, making it ideal for marine and outdoor applications.
UNIVERSAL VOLTAGE SUPPORT - Seamlessly compatible with both 12V and 24V DC systems, perfect for cars, boats, and solar setups.
EASY PANEL MOUNT INSTALLATION - Compact 3.85 x 1.69 x 1.37 inch size fits effortlessly on panels or firewalls for clean, professional setups.

This 2-pack of 40A manual reset inline circuit breakers from Y-SOLAR offers reliable overcurrent protection for 12V and 24V DC systems. Featuring a water-resistant rubber boot and compact panel-mount design, these breakers are perfect for automotive, marine, solar, and audio applications. Durable and easy to reset, they prevent costly fuse replacements while ensuring your electrical devices stay safe under demanding conditions.

Specifications

Brand	Temank
Current Rating	40 Amps
Voltage	24 Volts, 12 Volts
Item Dimensions LxWxH	3.85 x 1.69 x 1.37 inches
Circuit Breaker Type	Standard
Mounting Type	Panel Mount
Number Of Poles	2
Manufacturer	Y-SOLAR
Item Weight	0.81 ounces
Product Dimensions	3.85 x 1.69 x 1.37 inches
Item model number	Breaker2-40A*2-F
Is Discontinued By Manufacturer	No
Manufacturer Part Number	Breaker2-40A*2-F

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TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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