High Speed Blade Fuse

The High Speed Blade Fuse (10A–630A) is an ISO 9001-certified, ultra-fast current-limiting fuse engineered with a standardized plug-in blade terminal configuration to provide sub-millisecond short-circuit protection for power semiconductors (IGBTs, MOSFETs, SCRs) in heavy-duty industrial drives and electric vehicle charging infrastructure. 

Precision-Stamped 99.99 percent Pure Silver Elements: The internal clearing elements are calibrated to a precise thickness tolerance of less than plus/minus 0.005mm, reducing internal power loss by 18 percent and ensuring instantaneous sub-millisecond pre-arcing melting.
Reinforced C799 Alumina Body: High-pressure extruded ceramic housing provides dielectric strength greater than 15 kV per millimeter and handles internal pressures exceeding 200 MPa during high-energy arc confinement.
Vibrated Quartz Sand Matrix: High-purity, chemically treated silica sand is packed using mechanized high-frequency tables to eliminate air gaps, preventing internal restrike and achieving complete plasma arc extinguishing.
Low-Resistance Silver-Plated Terminals: T2 copper blade contacts feature a pure silver plating thickness greater than 5 microns, lowering contact resistance to less than 0.08 mOhm and maintaining terminal temperature rise below 45K. 

Optimized for high-density, space-constrained power electronic enclosures:

EV Infrastructure: DC Fast Charging Stations (60kW to 360kW), Integrated Power Cabinets.
Industrial Drives: Variable Frequency Drives (VFD), Servo Amplifiers, Soft Starters.
Power Conversion: Industrial UPS Systems, High-Power Converters, Photovoltaic (PV) Inverters.
DC Systems: Telecom Power Rectifiers, Battery Pack Modules, DC Distribution Panels. 

We support international equipment manufacturers with custom-tailored product variations:

Electrical Profiling: Custom I2t melting characteristics, modified time-current curves (TCC), and specific rated voltages up to 1200VDC.
Terminal Modifications: Custom blade dimensions, slotted blade tabs for direct bolt-down conversion, and dual-element parallel configurations.
Indication Systems: Integration of top-mounted visual strikers or microswitches for remote PLC alarm notification upon fuse rupture.
Private Labeling: Permanent high-resolution laser marking for corporate logos, proprietary customer part numbers, and custom batch tracking bar codes. 

Established in 1988, Zhejiang Chifeng Electric Co., Ltd. is a premier manufacturer dedicated to pioneering fuse technology and delivering high-reliability circuit safety solutions globally.

Decades of Industry Expertise:
Backed by over 35 years of specialized fuse manufacturing experience, trusted by 1,200+ clients worldwide.
Robust Technical Barriers:
Armed with 48 authorized patents (including core invention patents) and 159 qualification certificates, supported by a 65% automation rate in production.
Global Compliance & Certifications:
Formally ISO9001 certified. All products fully comply with IEC 60269 and GB 13539 standards, and hold prestigious international safety marks including CCC, CE, CB, TÜV Rheinland, and UL.
End-to-End Capability:
Operating from a 16,000 m² state-of-the-art facility, we house an in-house R&D center, a dedicated testing lab, and high-precision breaking capacity test systems.
Direct-from-Manufacturer Advantage:
Factory-direct sales model minimizes intermediary markups, ensuring top-tier quality with optimal cost efficiency. 

Manufacturing Capacity: 120,000 units per month utilizing semi-automated assembly lines with mandatory automated optical inspection (AOI).
Quality Verification: 100 percent screening for cold resistance, digital X-ray verification of sand fill density, and batch-level impulse current testing.

Standard Lead Times:
Engineering Samples: 3 to 5 Working Days
Mass Production (Orders under 10,000 pcs): 15 to 20 Working Days
Logistics & Packaging: Individual pieces are wrapped in anti-static film and boxed in double-wall reinforced export cartons. Available under EXW, FOB, CIF, or DDP terms via premium international express (DHL, FedEx, UPS), air cargo, or ocean freight.