Engineered for absolute operational reliability across residential, commercial, industrial, and renewable energy switchgear panels.
In modern electrical distribution networks, Miniature Circuit Breakers (MCBs) represent the critical ultimate barrier against thermal overloads and high-energy short circuits.
The OFDL series incorporates a optimized 12-plate arc splitter chamber designed to rapidly de-ionize and extinguish metallic electrical arcs under short-circuit events within under 10 milliseconds, preventing switchgear plasma flashes.
Precision-calibrated thermostatic bimetal strips ensure precise inverse time-delay tripping curves (B, C, D characteristics) for accurate protection against sustained current overloads without nuisance tripping.
Rigorously batch-tested to handle operational breaking capacities of 6kA and 10kA according to IEC/EN 60898-1 and IEC 60947-2 standards, offering unmatched mechanical durability over 10,000 switching operations.
| Parameter / Model | OFDL 1P | OFDL 2P | OFDL 3P | OFDL 4P |
|---|---|---|---|---|
| Rated Current (In) | 1A - 63A | 1A - 63A | 1A - 63A | 1A - 63A |
| Rated Voltage (Un) | 230V / 240V AC | 400V / 415V AC | 400V / 415V AC | 400V / 415V AC |
| Tripping Characteristics | B Curve (3-5In), C Curve (5-10In), D Curve (10-14In) | |||
| Ultimate Breaking Capacity (Icu) | 6,000A / 10,000A | 6,000A / 10,000A | 6,000A / 10,000A | 6,000A / 10,000A |
| Mechanical / Electrical Life | 20,000 Cycles / 10,000 Cycles | |||
| DIN Rail Mounting | Standard 35mm DIN Rail (EN 50022) | |||
Located in Yueqing, Wenzhou—the world-renowned capital of low-voltage electrical apparatus—Wenzhou OFA Electrical Technology Co., Ltd. delivers global market agility, component traceability, and uncompromised cost efficiency.
Rooted in Yueqing's comprehensive industrial hub, OFA benefits from instantaneous raw material sourcing (high-grade silver alloy contacts, flame-retardant VO plastics, electromagnetic copper coils), drastically shrinking lead times.
By integrating automated stamping, ultrasonic riveting, digital thermal-calibration testing rigs, and automated visual optical inspection (AOI), we maintain zero-defect standards at scalable production volumes.
Founded in 2013, OFA has been rated as Tax Credit Grade A for seven consecutive years. Passing ISO9001 quality system certifications, we guarantee lawful, transparent, and trustworthy B2B transactions.
Sourcing low-voltage switchgear is not merely about baseline pricing. True cost of ownership involves evaluating temperature rise margins under continuous duty, terminal clamp torque resistance, and plastic enclosure self-extinguishing capabilities under flame tests (IEC 60695-2-10). OFA’s OFDL series utilizes premium PA66 housings reinforced with glass fiber, ensuring structural stability under ambient thermal stress up to 70°C.
From renewable energy microgrids to mission-critical infrastructure, OFA protective switchgear delivers multi-tiered protection.
Paired with OF1-250/PV DC Molded Case Circuit Breakers, OFDL AC breakers protect solar inverter outputs, battery management system (BMS) auxiliary circuits, and combiner box distribution lines.
Ideal for AC EV charger sub-panels. Integrates seamlessly with OFC/OFDPN RCBO residual current protection to shield vehicles and users from pulsating DC and AC ground leakage faults.
Precision tripping mechanisms ensure rapid fault isolation in Rack Power Distribution Units (PDUs) and uninterruptible power supply (UPS) bypass sub-circuits, preventing catastrophic facility downtime.
Compact modular footprint allows seamless installation inside consumer units and flush-mounted distribution boards for lighting, HVAC, and automated building management systems (BMS).
Driving the continuous progress of power distribution and control technology through independent engineering and strict quality control.
Wenzhou OFA Electrical Technology Co., Ltd. is one of the professional suppliers of distribution switchgear and control equipment in China. Founded in 2013, the company is rooted in Yueqing, Wenzhou — the Capital of Electrical Appliances in China. It owns independent brands such as "OFA", and its products cover multiple industries including power, energy, industrial automation, construction, and equipment manufacturing.
We adhere to honest operations, maintaining Tax Credit Grade A status for seven consecutive years. Our technical team continues to innovate, equipped with full-process type testing and factory inspection devices for rigorous verification of mechanical life, temperature rise, and insulation performance.
Automated Assembly & Calibration
High-Precision Inspection Station
Finished Switchgear Warehouse
Make, carry, and break currents under normal and abnormal conditions such as overloads and short circuits. Series: BA88 Electronic, DCM1, DCOF1, OFM1, OFBLT, OF1, OFA-M1.
Essential guardians for terminal power distribution panels. Series: OFDL, OF6KA, OF10KA C65, OFAFT, OFD4Z7, OFDP, OFDZ47, OFEU, OFKL, OFKL-NXB, OFL7, OFL8, OFNC, OFPF, OFP.
High-performance intelligent main protection switchgear for complex industrial power systems. Series: OFW1 Intelligent Universal Circuit Breaker.
Dedicated high-reliability electric shock and earth leakage protection. Series: OFAP6-AC, OFDPN, OFDX, OFGX, OFID, OFL7, OFPM.
Integrates overload, short-circuit, and high-sensitivity residual current protection into a single unit. Series: OFC, OFKL-80A, NB1L, OFMIN, OFOM, OFR1.
Innovatively combines complete circuit protection with main isolating functionality. Series: OFIS-125A, OFIS-BH, OFIS-DS.
Transitioning from passive tripping safety to active prediction and IoT-connected energy management.
Integration of Modbus-RTU and RS485 IoT communication modules into standard MCB DIN footprints, enabling real-time voltage, current, and contact temperature reporting directly to SCADA platforms.
Deployment of AI-driven arc-fault detection algorithms (AFDD) to detect micro-arcing caused by aging insulation or loose wire connections before catastrophic electrical fires occur.
Transitioning 100% of product housings to halogen-free recyclable thermoplastics and low-carbon copper alloys, aligning with EU RoHS, REACH, and global net-zero carbon initiatives.
Discover why system integrators and industrial engineers rely on OFA for their electrical infrastructure.
"As a system integrator, our company has collaborated with OFA on several industrial automation projects. Their product range is comprehensive, simplifying our procurement. Product quality is consistent, reducing on-site commissioning hassles."
"We purchased OFA's power protection and monitoring devices to upgrade our workshop panels. They have been running stably for over a year. Cost-effective and reliable with clear technical documentation."
"Deploying OFA's energy management components across our commercial office portfolio was a wise decision. Outstanding responsiveness from their technical remote support team during commissioning."
Comprehensive technical and commercial answers to guide global electrical procurement decisions.
Directly connect with our factory sales and technical team for sample requests and bulk project quotations.
OFA Electrical
