Why does it have a neg and positive marking.. .usually you just interrupt the positive in this case with single pole?

Yes, usually you just interrupt the positive with single pole. DC is directional, so by marking positive and negative poles, and wiring according to the markings, you will clear that the DC direction is from circuit breaker bottom to top, which is easy to maintain.

What end top or bottom does the load connect to on a single pole breaker ? The breaker has a plus sign and a minus sign that is useless.

The load is generally connect on the top of the circuit breaker, DC direction is from the bottom of the circuit breaker to the top.

what wire size is accepted?

a wire size that is rated at 100amp.

Do you connect the battery to the top or bottom ?

There are polarity markings on the body of the switch. I connected the dc power lines accordingly.

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12V-110V DC Miniature Circuit Breaker, 125 Amp 1 Pole | Battery Breaker for Solar PV System and RV, Thermal Magnetic Trip, DIN Rail Mount, High Current DC Disconnect Switch 1P B125

12V-110V DC Miniature Circuit Breaker, 125 Amp 1 Pole | Battery Breaker for Solar PV System and RV, Thermal Magnetic Trip, DIN Rail Mount, High Current DC Disconnect Switch 1P B125

Product ID: 449390502

Details

Brand
CHTAIXI
Circuit Breaker Type
Standard
Current Rating
125 Amps
Mounting Type
DIN Rail Mount
Number Of Poles
1

⚡125A high current capacity

🔥Thermal magnetic trip with arc extinguishing

🔧DIN rail mount for easy installation

100.43 DT

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Description

⚡ Break free from power worries with the ultimate DC circuit guardian!

PREMIUM DURABILITY - Silver alloy contacts and flame-retardant shell deliver reliable performance under demanding conditions.
SEAMLESS INTEGRATION - Compact 1-pole design with universal 35mm DIN rail mount for effortless setup in any DC power distribution.
POWERHOUSE PROTECTION - 125 Amp rating safeguards your solar and RV systems from overload and short circuits.
VERSATILE APPLICATION - Perfect for solar PV, battery systems, electric mopeds, and RVs—your all-in-one DC disconnect switch.
ARC EXTINGUISHING TECH - Advanced magnetic system rapidly quells electrical arcs, ensuring safety and longevity.

The CHTAIXI 12V-110V DC Miniature Circuit Breaker is a robust 125 Amp, single-pole device designed for high-current DC systems like solar PV and RV battery setups. Featuring thermal magnetic trip technology and a magnetic arc extinguishing system, it ensures superior protection against overloads and short circuits. Its compact DIN rail mount design and premium materials make it a reliable, easy-to-install solution for modern off-grid and mobile power needs.

Specifications

ASIN	B0B1WC651R
Best Sellers Rank	#48,804 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #38 in Miniature Circuit Breakers
Brand Name	CHTAIXI
Circuit Breaker Type	Standard
Current Rating	125 Amps
Customer Reviews	4.4 4.4 out of 5 stars (53)
Manufacturer	CHTAIXI
Model	1 Pole
Mounting Type	DIN Rail Mount
Number of Poles	1
Part Number	47NZ125-B
Smart Home Compatibility	Not Smart Home Compatible
Unit Count	1.0 Count
Voltage	12 Volts

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100.43 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

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