250A Rapid Electrical Auto Fuse

The 250A Rapid Electrical Auto Fuse is a high-current, fast-acting bolt-on limiter engineered to provide localized short-circuit and severe overcurrent protection for automotive power distribution networks. Optimally designed for Electric Vehicle (EV) auxiliary loops, battery pack outputs, PDU (Power Distribution Unit) main lines, and heavy-duty commercial vehicle transport systems, this fuse ensures sub-millisecond fault isolation to safeguard expensive onboard electronics and wiring harnesses. 

High-Precision Stamped Element: The internal fuse element is manufactured using automated high-speed progressive stamping dies with a thickness tolerance within 0.01mm. This eliminates resistance variances and guarantees a highly predictable time-current characteristic (TCC) curve.
Low Contact Resistance: Tin-plated copper terminals undergo a specialized surface treatment to reduce contact resistance to less than 0.3 milliohms. This minimizes localized temperature rise inside sealed automotive fuse boxes and PDU housings.
Severe Automotive Vibration Immunity: Constructed with a rigid, insert-molded thermoplastic housing that completely encapsulates the fuse element, passing rigorous automotive vibration tests (ISO 16750-3 Random Vibration Standards up to 20g).
Flawless Arc Containment: The UL 94-V0 rated reinforced structural housing completely seals the internal melting chamber, ensuring zero external gas venting or plastic cracking during high-current 2000A DC short-circuit interruptions. 

We support automotive OEMs, Tier 1 system suppliers, and commercial vehicle fleet engineering teams with flexible customization:

Custom Current and Voltage Calibration: The internal terminal alloy composition can be retuned to provide non-standard ratings (e.g., 225A or 275A) inside the standard physical dimensions.
Localized Window Options: Available with transparent cover windows for easy visual inspection of blown elements, or solid colored housings for distinct visual differentiation of current ratings.
Automotive Logo and Part Number Marking: High-contrast fiber laser etching for continuous production tracking, including customer part numbers, standard automotive coloring codes, and production date codes.
PPAP Documentation Support: For qualified Tier 1 automotive projects, we provide complete PPAP (Production Part Approval Process) Level 3 documentation, including DFMEA, PFMEA, and control plans. 

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. 

We align our delivery processes with international automotive manufacturing supply chain requirements:

Minimum Order Quantity (MOQ): 500 units for standard stock specifications; 2000 units for custom brand packaging.
Factory Production Capacity: 250,000 units per month through multi-station automated assembly lines.
Industrial Grade Packaging: Fuses are packed in structured plastic trays (50 units per tray) to prevent terminal deformation, moisture-sealed in VCI anti-corrosion bags, and shipped in rigid export master cartons.
Global Shipping Frameworks: We offer regular FOB, CIF, or door-to-door DDP (Delivered Duty Paid) terms for seamless customs clearance into Europe, North America, and Southeast Asia.
Quality Framework Certification: Manufactured in an ISO 9001:2015 certified facility following IATF 16949 core tool methodologies to ensure zero-defect automotive production quality.