Explore our top-tier precision-engineered breakers built directly by Wenzhou OFA Electrical Technology Co., Ltd. for global distribution and integration.
Unlike Alternating Current (AC) circuits that naturally pass through a zero-voltage point 100 or 120 times per second, Direct Current (DC) maintains continuous voltage, making electrical arc suppression exponentially more challenging.
Our 15 Amp DC Miniature Circuit Breakers (MCBs) incorporate high-coercivity permanent magnet assemblies. When an overcurrent or short circuit trip occurs, the magnetic field forces the continuous DC electric arc into the splitter plates, stretching and cooling it instantaneously.
Equipped with AgCdO or AgZnO solid silver alloy contact points, our 15A breakers resist contact welding under high-fault peak current surges. This delivers an operational electrical lifespan exceeding 10,000 switching cycles under nominal loads.
Precision calibrated bimetallic strips ensure thermal overload protection at exact current thresholds (1.13 In non-tripping to 1.45 In tripping), protecting sensitive 15 Amp DC solar wiring and equipment against sustained thermal degradation.
Substituting an AC breaker into a 15 Amp DC application is one of the leading causes of electrical fires in solar photovoltaic installations and battery storage banks. Because AC breakers rely on zero-crossing current to extinguish arcs, a DC arc inside an AC breaker will sustain continuously, melting the plastic housing and causing cataclysmic thermal runaway. Chinese manufacturing pioneer Wenzhou OFA Electrical Technology Co., Ltd. specifically designs dedicated non-polarized and polarized DC arc chutes capable of safely interrupting DC arcs up to 1000V DC.
Located in China's legendary Capital of Electrical Appliances, Wenzhou OFA Electrical Technology Co., Ltd. combines localized supply chain speed with rigorous international testing standards.
Our Yueqing factory houses dedicated digital inspection stations and full-process testing devices. Every batch of 15 Amp DC breakers undergoes mechanical endurance verification, dielectric voltage withstand testing, dynamic temperature rise checks, and instantaneous magnetic calibration prior to boxing.
By leveraging automated stamping, continuous copper braid welding, and laser-assisted housing assembly, OFA delivers highly competitive OEM prices without sacrificing component precision. Flexible manufacturing permits both rapid small-batch custom branding and high-volume containerized shipments.
From rooftop residential solar arrays to global telecom networks, 15 Amp DC circuit breakers serve as crucial guardians of modern green infrastructure.
Standard 15A DC breakers are widely specified as string protection devices inside PV combiner boxes. Installed between PV module strings and central inverters, they prevent reverse current loops and isolate faulty photovoltaic arrays during maintenance.
With the global shift toward LiFePO4 solar wall batteries and 48V DC off-grid storage, 15A DC breakers protect battery management systems (BMS) against catastrophic overcurrent and dead short conditions.
Telecommunication towers relying on 48V/60V DC uninterrupted power supplies (UPS) use 15 Amp DIN-rail mounted DC breakers to isolate individual transmitter channels, ensuring continuous operational uptime.
Rigorous engineering standards tailored for high-reliability electrical distribution installations.
| Electrical Parameter | Standard Specification (15A DC MCB) | High-Voltage PV Variant | Test Standard Compliance |
|---|---|---|---|
| Rated Current (In) | 15 Amp (15A) | 15 Amp (Specialized) | IEC 60947-2 / GB 14048.2 |
| Rated Voltage (Ue) | 1P: 250V DC / 2P: 500V DC | 4P: 1000V DC to 1500V DC | EN 60947-2 |
| Ultimate Breaking Capacity (Icu) | 6kA at 500V DC | 10kA at 1000V DC | IEC 60898-2 (DC) |
| Tripping Curve Options | B Curve (3-5 In) / C Curve (7-10 In) | K Curve / D Curve (10-14 In) | Factory Calibrated Thermal-Mag |
| Enclosure Protection Class | IP20 (Terminals) / IP40 (Front Panel) | IP65 (In Combiner Box Enclosure) | IEC 60529 |
| Mechanical / Electrical Life | 20,000 Operations / 10,000 Operations | 15,000 Ops / 8,000 Ops | ISO 9001 Audited SOP |
| Housing Material | Flame Retardant PA66 (UL 94-V0) | PA66 Thermoplastic High Temp | RoHS & REACH Compliant |
How international system integrators, EPC contractors, and brand owners streamline direct factory sourcing with Wenzhou OFA Electrical Technology Co., Ltd.
We provide full-spectrum OEM services including laser logo engraving, custom color handles, specialized voltage rating tampo printing, and customized retail box packaging tailored to your brand identity.
Because our core factory components are manufactured in Yueqing’s unified industrial hub, standard 15A DC breaker orders enjoy expedited manufacturing cycles with reliable FOB, CIF, or DDP shipping terms.
Every shipped circuit breaker bears a unique factory lot code. Samples from each batch are retained for high-temperature drift testing, dielectric flashover tests, and mechanical fatigue logging.
Get authoritative answers regarding electrical engineering parameters, polarity rules, and factory procurement from our technical specialists.
A polarized 15A DC breaker relies on internal permanent magnets situated in a specific direction relative to current flow. Wiring must strictly match positive (+ IN) and negative (- OUT) markings; incorrect wiring prevents arc extinction and causes breaker destruction. A non-polarized DC breaker utilizes symmetrical dual-directional arc chutes, allowing current flow in either direction—ideal for battery systems that charge and discharge through the same line.
Under standard electrical codes (such as NEC), copper conductors connected to a 15A DC circuit breaker should generally be 14 AWG (minimum) for short runs, or upgraded to 12 AWG / 10 AWG for longer runs to prevent DC voltage drop over distance. Always verify ambient temperature derating factors in solar combiner enclosures.
Yes. A 15A DC breaker rated up to 250V DC or 500V DC will safely operate at lower continuous voltages such as 12V, 24V, 36V, or 48V DC. The amperage rating (15 Amps) dictates when the thermal overload release trips, while the voltage rating defines the maximum electrical isolation capacity of the arc chute.
For solar PV string array protection, a Type B (tripping at 3-5 times rated current) or specialized PV trip curve is recommended due to low short-circuit current variance in solar panels. For inductive loads like DC motors, pumps, or heavy power supplies with high inrush surges, a Type C (7-10 In) or Type D (10-14 In) trip curve prevents nuisance tripping.
For standard production items, flexible minimum order quantities (MOQs) apply. Custom laser branding and customized OEM packaging generally start at 1,000 units per model variant. Standard lead time is 15-25 days, with fast-track options available for urgent project requirements.
Discover our comprehensive family of Miniature Circuit Breakers (MCB), Molded Case Breakers (MCCB), Earth Leakage units (RCBO/RCCB), and Air Circuit Breakers (ACB).
Heavy duty power distribution protection up to 630A. Features BA88 Electronic, DCM1, DCOF1, OFM1, OFBLT, OF1, and OFA-M1 series engineered for robust industrial short-circuit isolation.
DIN-rail protection including OF6KA, OF10KA C65, OFAFT, OFD4Z7, OFDL, OFDP, OFDZ47, OFEU, OFKL, OFKL-NXB, OFL7, OFL8, OFNC, OFPF, and OFP series for standard AC & DC sub-circuits.
Combined residual current and earth leakage protection. Models include OFC Series, OFKL-80A, NB1L, OFMIN, OFOM, OFR1, OFAP6-AC, OFDPN, OFDX, OFGX, OFID, and OFPM series.
Get immediate technical support, direct China factory pricing, and certified 15 Amp DC Circuit Breaker OEM/ODM configuration for your project needs.
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