CHIYT DC MCB 2P 125A 1000V DC (NBT2-125DC) – High Current Solar & Battery Circuit Breaker

CHIYT DC MCB 2P 125A 1000V DC (NBT2-125DC) – High Current Solar & Battery Circuit Breaker

CHIYT NBT2-125DC is a heavy-duty 125A DC MCB rated up to 1000V DC. With 2-pole protection and 10kA breaking capacity, it safely protects large solar PV systems, lithium or lead-acid battery banks and hybrid inverters from overload and short circuit.

Why use a DC MCB?

A high-current DC line can carry huge fault current. If a cable shorts, it can burn the wire, the battery or the inverter. A proper DC-rated breaker breaks DC current safely — an ordinary AC breaker cannot reliably stop a DC arc.

Key Features

• Rated current 125A — for large battery and inverter lines
• Rated voltage up to 1000V DC
• 10kA high breaking capacity
• C-curve thermal-magnetic trip (overload & short circuit)
• Double-pole (2P) protection on + and − lines
• Copper terminals, mechanical life ≥ 20,000 operations, electrical life ≥ 8,000
• IEC 60947-2 standard, CE & CCC certified
• Standard 35mm DIN-rail installation

Applications

• Solar PV string and combiner boxes
• Battery bank to inverter connection (48V / high-voltage)
• Hybrid and off-grid solar inverters
• DC distribution panels
• EV-charging and industrial DC circuits

Installation tips

• Switch the system OFF and cover the solar panels before wiring.
• Follow the + and − marks printed on the breaker — DC breakers are polarity-sensitive.
• Use cable of the right size for the current and tighten terminals firmly.
• Mount on a standard 35mm DIN rail inside a proper DC distribution box.
• If you are not sure, get a qualified electrician to install it.

What's in the box

• 1 × CHIYT 125A DC MCB 1000V (NBT2-125DC)

Frequently Asked Questions

Can I use a 125A DC MCB with a battery?

Yes. It is ideal between a battery bank and an inverter where current is high.

Is it suitable for solar panels?

Yes. With a 1000V DC rating it handles high-voltage solar strings.

Can I use an AC MCB instead?

No. AC breakers are not designed to break a DC arc safely — always use a DC-rated MCB.

What does 10kA mean?

It can safely break a short-circuit fault current up to 10,000 amps.

Buy CHIYT 125A DC MCB 1000V (NBT2-125DC) in Bangladesh

Order the original CHIYT 125A DC MCB 1000V (NBT2-125DC) from PB SHOP BD with cash on delivery all over Bangladesh, fast delivery inside Dhaka and a 1-month replacement warranty (terms & conditions apply). Call or WhatsApp us for expert advice before you buy.