Military Aviation Copper Fuse BZ-2 Series (60A, 80A, 100A) |
High-Current Circuit Protection for Critical Systems
Product Overview
The YM Military Aviation Copper Fuse BZ-2 Series is engineered for high-reliability circuit protection in demanding aerospace, drone, and industrial applications. Designed to safeguard aircraft engines, train propulsion systems, and unmanned vehicle power circuits, these fuses provide precise and rapid interruption of overcurrent faults. As a critical component in electrical systems that often include our Military Metal Relay and Industrial Power Relay, the BZ-2 fuse ensures system integrity and safety. Its pure copper construction and military-grade design offer superior conductivity and thermal performance compared to standard alloy fuses.
Core Advantage: Exceptional current-carrying capacity and precise breaking characteristics, ensuring protection of expensive downstream components like Solid State Relays and control systems.
Technical Specifications
- Model Series: BZ-2
- Rated Current (In): 60A, 80A, 100A, 150A (Standard Range)
- Construction Material: High-Purity Electrolytic Copper Body
- Electrical Characteristics:
- Voltage Rating: Suitable for standard 28V DC aircraft systems and compatible with Automotive Relay and New Energy Relay circuit voltages.
- Breaking Capacity: High interrupting rating designed for aerospace power circuits.
- Contact Resistance: Extremely low initial resistance (≤50mΩ) ensures minimal voltage drop and heat generation under normal load.
- Performance & Durability:
- Time-Current Characteristic: Fast-acting design for critical circuit protection.
- Mechanical Life: Robust construction for high vibration environments.
- Environmental & Physical:
- Sealing: Available in hermetically sealed versions for moisture and corrosion resistance (Leakage rate ≤10^-1 Pa·cm³/s).
- Weight: Lightweight design, contributing to overall system weight savings.
- Operating Temperature: Stable performance across a wide temperature range, with reference at 25°C.
Note: Detailed time-current curves and specific dimensional drawings are available upon request for precise system integration.
Product Features & Advantages
- Pure Copper Construction: Offers lower resistance and better thermal conductivity than tin-plated or alloy alternatives, reducing operating temperature and improving efficiency.
- Military-Grade Reliability: Manufactured to stringent standards for shock, vibration, and endurance, making it a perfect match for systems using our Military Metal Relay products.
- Precise Calibration: Each current rating (60A, 80A, 100A) is accurately calibrated to ensure consistent and predictable tripping characteristics.
- Rapid Fault Clearing: Fast-acting element design minimizes let-through energy (I²t), protecting sensitive downstream electronics like PCB Signal Relays and avionics.
- Robust Mechanical Design: Sturdy terminals ensure secure connection and prevent loosening under vibration, a common requirement in aviation and heavy machinery.
- Thermal Stability: Maintains performance across extreme temperature fluctuations encountered in aerospace and industrial environments.
Our Manufacturing Advantage: YM utilizes precision stamping and quality control processes derived from our expertise in producing PCB Board Relays and Latching Relays, ensuring dimensional accuracy and material integrity in every BZ-2 fuse.
How to Select and Install the BZ-2 Fuse
- Circuit Analysis: Determine the normal operating current, potential inrush currents, and the required interrupting rating for your specific circuit (e.g., engine starter, power distribution bus).
- Current Rating Selection: Choose the BZ-2 fuse with a current rating typically 125-150% of the circuit's normal continuous load. Consider ambient temperature derating.
- Physical Inspection: Before installation, verify the fuse rating label and inspect for any shipping damage.
- Secure Installation: Mount the fuse in a designated holder or bracket. Ensure terminals are clean and tightened to the specified torque to minimize contact resistance.
- System Integration & Test: Integrate into the circuit. Perform a continuity test and then a low-current operational test before full system power-on.
Application Scenarios
The BZ-2 Copper Fuse is critical for primary and branch circuit protection in high-integrity systems:
- Manned & Unmanned Aircraft (UAVs/Drones): Protects main engine control units, generator feeder lines, and avionic power distribution panels.
- Railway Rolling Stock: Safeguards auxiliary power converters, traction control circuits, and lighting systems in trains.
- Industrial Machinery & Power Supplies: Used as input protection for high-power servo drives, rectifiers, and systems employing Industrial Power Relays.
- Ground Support Equipment (GSE): Protects power systems in aircraft tugs, start carts, and mobile testing units.
- Renewable Energy Systems: Can be specified for DC-side protection in certain New Energy applications, complementing specialized New Energy Relays.
Value for Buyers: Prevents catastrophic electrical failures, reduces fire risk, ensures compliance with aviation and industrial safety standards, and lowers total cost by protecting high-value assets from overcurrent damage.
Certifications & Compliance
Produced in our SGS-audited manufacturing facility, the BZ-2 series is designed to meet the performance and safety criteria of relevant military (MIL) and aerospace specifications. While end-product certification often depends on the final assembly, our components are manufactured with the same rigorous discipline applied to our certified Automotive Relay lines, adhering to fundamental principles of IEC and UL standards for circuit protection.
Customization Options
YM understands that standard solutions may not fit every unique application. We offer flexible customization for the BZ-2 series, including:
- Custom current ratings beyond the standard range (e.g., 120A, 200A).
- Specific time-delay (slow-blow) characteristics for circuits with high inrush currents.
- Variations in terminal type, size, or plating (e.g., silver plating for even lower contact resistance).
- Special packaging, labeling, or branding for OEM integrations.
- Development of fully sealed versions for submerged or extreme environment applications.
Our strong OEM/ODM capability, proven through collaborative projects on Polarized Relays and custom Flash Relays, is at your service.
Production & Quality Assurance Process
Every BZ-2 fuse is the result of a controlled, multi-stage manufacturing and testing process:
- Material Certification: Incoming high-purity copper is verified for grade and conductivity.
- Precision Stamping: Fuse elements and terminals are stamped with high-precision dies to ensure consistent geometry and current-carrying cross-section.
- Calibration & Assembly: The fuse element is precisely calibrated and assembled into its housing under controlled conditions.
- 100% Electrical Testing: Every unit undergoes resistance testing and, for critical batches, sample high-current trip testing.
- Environmental Stress Screening (ESS): Sample units from each production lot are subjected to vibration and thermal cycling tests.
- Final Inspection & Traceability: Visual inspection, marking verification, and packaging. Each batch maintains full traceability.
This rigorous approach mirrors our quality systems for all products, from Solid State Relays to Latching Relays, guaranteeing performance you can trust.
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