Bulgaria’s strategic position as a vital energy and logistics hub in Southeastern Europe has triggered a major overhaul of its power distribution landscape. With accelerated investments in renewable energy across the Thracian Plain, comprehensive modernization of industrial clusters in Sofia, Plovdiv, Ruse, and Varna, and strict compliance requirements under EU Directive 2014/35/EU, electrical panel builders, EPC contractors, and OEM machine manufacturers require robust, high-performance protection devices.
The MCCB DCM1 Series (Molded Case Circuit Breaker) engineered by Wenzhou OFA Electrical Technology Co., Ltd. represents the peak of reliability, precision tripping, and long-term durability. Designed to handle severe short-circuit stresses, extreme ambient temperatures, and transient voltage surges, the DCM1 Series bridges the gap between cost-efficiency and premium European engineering requirements.
The DCM1 Molded Case Circuit Breaker series is engineered to perform critical circuit switching, overload protection, and short-circuit isolation across commercial, industrial, and power generation systems.
Utilizing a specialized grid-structure arc chute combined with magnetic blowout principles, the DCM1 rapidly split and quenches electrical arcs within milliseconds during high fault currents, preventing internal contact erosion and cabinet damage.
Integrates precision inverse-time thermal bimetallic trip elements for sustained overcurrent condition protection and ultra-fast electromagnetic instant trip units for high-magnitude short-circuit faults (up to Icu=85kA at 400V).
Molded using high-density Dough Moulding Compound (DMC) fiberglass-reinforced polyester resin, providing superior mechanical dielectric strength, zero flame propagation (UL94 V-0 level), and resistance to harsh ambient vibrations.
| Frame Size Model | Rated Current (In) Range | Poles (P) | Rated Voltage (Ue) | Ultimate Breaking Cap. (Icu) | Service Breaking Cap. (Ics) | Tripping Mechanism |
|---|---|---|---|---|---|---|
| DCM1-63 | 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A | 3P, 4P | AC 400V / 690V | 35 kA | 22 kA | Thermal-Magnetic |
| DCM1-125 | 63A, 80A, 100A, 125A | 1P, 2P, 3P, 4P | AC 400V / 690V | 50 kA | 35 kA | Thermal-Magnetic / Electronic |
| DCM1-250 | 125A, 160A, 200A, 225A, 250A | 1P, 3P, 4P | AC 400V / 690V | 65 kA | 50 kA | Thermal-Magnetic / Electronic |
| DCM1-400 | 250A, 315A, 350A, 400A | 3P, 4P | AC 400V / 690V | 70 kA | 50 kA | Microprocessor / Electronic |
| DCM1-630 / 800 | 400A, 500A, 630A, 700A, 800A | 3P, 4P | AC 400V / 690V | 85 kA | 65 kA | Microprocessor / Intelligent |
Founded in 2013 and headquartered in Yueqing, Wenzhou—the undisputed Capital of Electrical Appliances in China—Wenzhou OFA Electrical Technology Co., Ltd. stands as a benchmark manufacturer of low-voltage distribution switchgear and industrial automation accessories.
With an unwavering commitment to engineering accuracy and raw material integrity, OFA manufactures components that fulfill international market access criteria. Rated as Tax Credit Grade A for seven consecutive years, our operational transparency and dependable execution have earned us enduring partnerships across Europe, South America, Asia, and the Middle East.
DCM1 DC/AC circuit breakers provide essential protection in solar string combiner boxes, central inverters, and grid-tied step-up transformer stations across Southern Bulgaria solar farms.
Protects heavy machinery, motor control centers (MCC), and automated production facilities in Plovdiv and Ruse industrial parks against current overloads and short circuits.
Provides main input power switching and downstream sub-distribution protection in high-rise office towers, data centers, logistics hubs, and commercial shopping centers.
Heavy-duty circuit breaking capability for high-power DC fast-charging station hubs positioned along key transport routes such as the Struma and Trakia motorways.
A clear comparison showcasing why Bulgarian panel builders and distributors are switching to OFA DCM1 Series for high ROI and guaranteed quality.
| Evaluation Parameter | OFA MCCB DCM1 Series | Standard European Brands | Bulgarian Buyer Advantage |
|---|---|---|---|
| Price / Performance Ratio | High Factory-Direct Efficiency | High Premium Brand Surcharge | Reduces BOM costs by up to 30-40% without compromising safety. |
| Manufacturing Lead Time | Agile 15-25 Days Production | Extended 8-16 Weeks Lead Time | Faster project delivery for urgent grid upgrades & solar construction. |
| Customization & OEM | Full Brand, Terminal & Curve Flexibility | Rigid Standard Offerings Only | Tailor-made solutions to fit legacy cabinet retrofits in Bulgaria. |
| International Certifications | CE, IEC 60947-2, ISO9001 Compliant | CE, IEC, UL Certified | Full regulatory approval for grid interconnection in the EU. |
| Service & After-Sales Support | Direct 24/7 Engineering Desk | Multi-tiered Support Desk | Rapid technical response directly from the manufacturing engineers. |
DCM1, BA88, DCOF1, OFM1, OFBLT, OF1, OFA-M1 Series with current ratings up to 1600A.
OF6KA, OF10KA C65, OFAFT, OFD4Z7, OFDL, OFDP, OFDZ47, OFEU, OFKL, OFL7, OFL8, OFNC, OFP Series.
OFAP6-AC, OFDPN, OFDX, OFGX, OFID, OFPM, OFC, OFKL-80A, NB1L, OFMIN, OFOM, OFR1 Series.
Submit your project single-line diagram (SLD) or required MCCB specifications. Our technical sales team reviews voltage, pole configuration, and breaking capacity requirements.
OFA delivers a comprehensive commercial quotation alongside dimensional CAD drawings, accessory configurations (auxiliary contacts, shunt trips), and compliance documentation.
Evaluation samples dispatched to Sofia or local testing facilities. Upon sign-off, automated mass production commences under full ISO9001 SOP monitoring.
Products are securely palletized and shipped under CIF/FOB terms to Bulgarian ports, complete with Certificate of Origin, CE declarations, and HS customs paperwork.
"As a system integrator, our company has collaborated with OFA on several industrial automation projects. Their product range is quite comprehensive, covering everything from protective relays to communication gateways, which simplifies our procurement and integration work."
"We purchased OFA's intelligent power monitoring devices and MCCBs to upgrade the power distribution system in our plant. The installation was simple, integration went smoothly, and most importantly, they have been running very stably for over a year."
"Our solar PV project required reliable circuit breakers and communication management. OFA's products met our core needs at a very competitive price point while adapting well to tough outdoor environments."
Complement your DCM1 MCCB installations with our full range of certified miniature circuit breakers, residual current devices, and DC isolation switchgear.
Contact Wenzhou OFA Electrical Technology Co., Ltd. today to discuss your MCCB DCM1 requirements, request direct factory pricing, or obtain custom engineering samples.
OFA Electrical
