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Chtaixi DC Miniature Circuit Breaker
Warm Tips:
- Pay attention to polarity.
- Select wire size according to rated current.
Magnetic Arc Extinguishing
AC has a zero-crossing point, but DC does not, so DC arc is more difficult to extinguish than AC arc, which is why AC circuit breakers can not be used for DC power, and DC circuit breakers can be used for AC power. This DC mini circuit breaker is equipped with a magnetic field system under the breaking contacts, which can pull the arc to the arc extinguishing chamber to assist arc extinguishing.
Quality Products to Protect Your Electricity Safety
Polarity Marked
This DC MCB has no polarity requirement in use, and the positive and negative poles can be inverted. However, the installation, use, and maintenance of DC circuits are based on polarity requirements. So, in order to provide reliable indication and reference for the distribution, we highly recommend that you connect the wires according to the marked polarity.
Tunnel Terminal
The clamping design of the terminal block is designed to connect firmly, and the tightening torque is 2.5 N.m. ( Soft silicone wire needs to crimp fixed the wire end with copper crimp before wiring. ) Make sure that the wires are tightly connected when connecting to prevent loosening and heating. The surface of the terminal is tin-plated, and the plating layer can improve conductivity, corrosion resistance, and durability.
Silver Alloy Contacts
Contacts are very important to circuit breakers, especially for DC distribution with high arc extinguishing requirements. Good contacts can reduce the heat generated by arcing during disconnection and reduce the wear of the contacts. This DC circuit breaker uses silver alloy contacts, which improves electrical durability, and protects your electricity safety for a long time.
Installation
DIN Rail
Install the 35mm DIN rail horizontally in a stable environment.
Installation
- Hang the circuit breaker slot on the DIN rail
- Push the lower end of the circuit breaker into the DIN rail
Dismounting
- Push the circuit breaker upward
- Turn the upper end of the circuit breaker out of the DIN rail
Tim Fandel
2025-09-06 15:09:48
Decent price and easy to install.
CW
2025-08-18 18:54:33
Seems to be a good and reliable breaker so far, but have only been used for testing at this point in intended circuit. That being said, power pass through as well as breaker shut on and off functions well.
RussVerk
2025-08-14 14:46:13
I installed 3 of these almost a year ago. I have had no issues with PV voltages from 3 solar arrays, all putting out up to 500 Vdc at times. I recently rewired a PV array of 12 panels. Made the mistake of inverting the polarity. When I turned on the breaker, it smoked, bigtime! then all was silent. No fire, no melting of the breaker. I measured the voltage at the input and realized the polarity was reversed. My bad! I disabled the voltage at the panels, rewired correctly, and connected to a new breaker. All worked well.My biggest point with this review is, even though the breaker fried, it kept the reverse voltage of over 400 Vdc from getting to the solar inverter and causing hundreds to thousands of dollars in damage. The breaker not only will trip if the amperage is exceeded, but also protects from reversed Vdc. Very thankful!
Frank Odom
2025-08-07 12:01:46
Good breaker and was easy to install. Feel the money was well spent. Works good.
Mark sutton
2025-08-06 12:16:33
Work so well I ordered another one
J
2025-07-22 11:20:14
i'm using these between a set of solar panels wired in series-parallel and what has quickly become my most favorite compact Victron Solar Charge Controller, especially at its more recent favorable price (this one: https://amzn.to/3JhCLgR). I have found these miniature circuit breakers do the job perfectly: they are easy to install using the provided DIN rail and screws, easy to slide on/off or clip on/off to the rail while working with the cabling, and while a few other reviewers have mentioned cable grip, I have been fortunate, and have found the breaker to grip the cables well. It is important when purchasing breakers like these to consider size matching to ensure that the gauge of cable being used is an appropriate size for not only the electrical requirements of the system, but also for the cable slots in both the charge controller and the circuit breaker.PRO TIP: it is also important to carefully strip the wire ends to a proper length. The goal is adequate exposure to the terminals and terminal clamps, but not more than that. With both these breakers and the Victron charge controller, I was able to use 6AWG cable, stripped back about one-half inch, and the cables seated cleanly and firmly.Overall, not only is it a best-practice to safeguard your solar setup with proper breakers and/or fuses, it also makes it more convenient, safer, and provides some peace-of-mind when you need to work with it. Enjoy!
Rich marriott
2025-06-17 09:56:14
I bought two of these they work great for pv disconnects in my solar system
Donnell Schweitzer
2025-06-05 10:18:02
Very good
JCSimpson
2025-05-29 15:32:02
Nice and small breaker. Used it to cut power from solar panels to charge controller. All the items required for installation were included.
James
2025-05-06 17:36:42
Breaker is as described, cept the din rail mount was not included, only the breaker
Ramon S.
2025-02-06 13:51:19
The media could not be loaded.
P. D.
2025-01-20 10:47:15
The DIN mounting bracket, included with the breaker, is missing. I received a uses/returned item.
Marco123
2025-01-13 14:20:28
Description said it came with a DIN rail and screws, but only received the breaker. With nothing to mount it on returned the breaker.
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