DC MCCB | Molded Case Circuit Breakers for DC Applications

Typically used to protect photovoltaic power generation systems that work on DC currents, SUNTREE line of DC circuit breakers are cost-effective and
high-quality solutions for your brand.

Our qualified team of experts, backed by 16 years of industry experience, understands what the market needs, and manufactures modular circuit
breakers based on your specifications. Expect fast and efficient production with our certified facility that houses many automated production lines,
churning out 200,000+ pieces annually. Place your bulk order today and take advantage of our amazing wholesale prices that are better than the competition.

Miniature circuit breaker electrical life

Test the electrical service life of miniature circuit breakers, requiring all < 125A products to reach 2000 times Testing standard: According to the order quantity, it is tested according to the QAL class I 0.65 Test products: circuit breaker

Molded case circuit breaker mechanical life

Test the mechanical life of all molded case circuit breakers, requiring ≤250A/10000 times 400/630A 4000 times 800A 1000 timesTesting standard: According to the order quantity, it is tested according to the QAL class I 0.65

High and low temperature test

Test the extreme operating environment of the product, requiring the product to operate normally at an ambient temperature of -20°C~70°CTesting standard: According to the order quantity, it is tested according to the QAL class I 0.65 Test products: DC circuit breakers, DC surge protectors, DC fuses and other full range of products

Glow wire flame test bench

Test plastic parts products, such as PA66, PA46, PBT, DMC, etc., the flame retardant materials for 960 ℃ 30 seconds burn test, requiring that when the plastic parts are separated from the product, the product flame to be extinguished within 30, and no burning materials fall.Testing standard:According to the order quantity, it is tested according to the QAL class I 0.65

Frequently Asked Questions

Is there any external arc during breaking? Is a partition required for side-by-side installation in cabinets?

Our DC MCCB features a fully enclosed arc chamber design, achieving zero arc flash. This means that when installed side by side in a cabinet, no additional insulation barriers are required, effectively reducing the overall size of the distribution cabinet. Additionally, a protective cover is available as an optional accessory.

Is a motor operator supported? Is the control voltage AC or DC?

Yes. We offer external motor operators and manual charging mechanisms. Control voltage supports a wide range, including DC 12V, 24V, 48V, and AC 110V/220V, matching ESS battery voltages.

What is the rated current range of the Molded Case Circuit Breaker (MCCB)?

Suntree DC MCCB covers a wide rated current range. The SM8-250HPV series covers 100A to 250A, while the larger SM8-400HPV series reaches 200A to 400A. For higher current requirements, the NS series MCCB supports rated currents from 12.5A to 800A.