Can be used on 120vac

No, these are 12V DC fuse and fuse holders for automobile applications. The ratings are displayed in the details.

Why would you cover copper wire with Tin? You know different metals in an electrical circuit can spark right?

Tin is a base metal. You coat copper wires with tin for use in high moisture environments because the tin will help protect the copper wire from early onset of corrosion. You also tin small strand wires to hold them together to better make sure all the strands are making a connection for conducting the load. Look into marine wiring if you are curious about the prevalence of tinned wires.

Are all 4 red color ? Do they sell black too?

All the same color, more orange than red.

Will these work for 48v nominal (~55v upper voltage) systems?

They use 10 gauge stranded wire. 10 gauge (solid) is what folks use to wire electric water heaters and is rated at 600volts A.C. - 30 amps. I am looking at one I bought right now, and the wire IS marked 600 volts right on it. They can be used for 40 amp loads at lower voltages in my opinion since they ship with 40 amp fuse directly from the factory. So it seems that 45-55 volts would be of little concern as long as you keep the amperage under control. 120 volts @ 4 amps translates to 12volts @ 40 amps which is probably why they are equipped with 40 amp fuses from the factory. Obviously, you would use a lesser rated fuse at 45 VDC. Looks like about 10 amps or so to me.

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282PCS Standard and Mini

Product ID: 222009953

Details

AC Adapter Current
40 A
Brand
Qizpcer
Material
Copper Rubber
Mounting Type
Holder
Voltage
12 volts

⚡Supports up to 40A current

💧Water-resistant sealed cap

🔌10 AWG heavy-duty wire

HK$165

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power up with confidence—fuse protection that never quits!

VALUE PACKED 4 PACK - Includes four fuse holders and four 40A fuses—ready to power multiple projects instantly.
HIGH AMPERAGE SAFETY - Supports up to 40 amps with reliable ATC blade fuses for ultimate circuit protection.
ROBUST 10 AWG WIRING - Heavy-duty red wire built to handle demanding electrical projects with ease.
MOISTURE RESISTANT DESIGN - Sealed cap keeps water and dust out, ensuring durability in any environment.
VERSATILE INLINE INTEGRATION - Easily splice into any 12V project for seamless fuse protection on the go.

The Qizpcer 10 Gauge Inline Fuse Holder 4-pack features heavy-duty 10 AWG red wire and supports up to 40 amps with ATC blade fuses. Designed for 12V systems, each holder includes a water-resistant cap to protect against moisture, making it ideal for durable, reliable circuit protection in automotive and electrical projects.

Specifications

ASIN	B08BWRSPY1
Best Sellers Rank	#2,802 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Fuse Holders
Brand Name	Qizpcer
Current Rating	40 A
Customer Reviews	4.8 4.8 out of 5 stars (2,423)
Global Trade Identification Number	00738631721604
Manufacturer	Qizpcer
Material Type	Copper, Rubber
Maximum Current	40 A
Model	BXSZ-4
Mounting Type	Holder
Part Number	BXSZ-4
UPC	738631721604 073863172160
Unit Count	4 Count
Voltage	12 volts

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