Dual-Compatible Replacement for 2525 ECE & S207 LEACH
YM introduces the JQ-35FH Military Aviation Contactor, a versatile high-reliability component engineered to directly replace both 2525 ECE and S207 LEACH contactors in demanding aerospace applications. This dual-compatible solution provides precise power switching for drone systems, aircraft engines, and critical circuits across aviation, rail, and aircraft platforms. Manufactured with the same exacting standards as our Military Metal Relay and High Power Aviation Contactor series, the JQ-35FH delivers superior performance while simplifying maintenance and inventory management for legacy systems.
Engineering Features & Dual-Compatibility Advantages
The JQ-35FH is engineered as a superior replacement solution that addresses common legacy system requirements, incorporating advanced design principles from our Solid State Relay and Hydraulic Circuit Breaker technology programs.
- Dual-Model Compatibility: Direct form-fit-function replacement for both 2525 ECE and S207 LEACH contactor series, significantly reducing inventory complexity and procurement challenges for maintenance organizations.
- Enhanced Contact Performance: Features ultra-low initial contact resistance (≤50mΩ) for optimal power transfer efficiency and minimal voltage drop. Maintains reliable performance throughout extended service life (≤200mΩ post-test), consistent with our premium PCB Board Relay quality benchmarks.
- High-Speed Precision Switching: Delivers rapid action time (≤3ms) and release time (≤4ms), providing critical timing accuracy for flight control systems, automated sequences, and sensitive avionics controls.
- Military-Grade Hermetic Sealing: Advanced sealed enclosure with maximum leakage rate of ≤10⁻¹ Pa·cm³/s offers superior protection against moisture ingress, dust, chemical exposure, and pressure differentials, utilizing technology proven in our Aviation Oil Sealed Valves.
- Extended Operational Lifespan: Rated for 1,000,000 cycles at full rated load (1A, 28V DC), significantly extending maintenance intervals and reducing total lifecycle costs for mission-critical systems.
- Optimized Weight & Power Efficiency: Weighing less than 3 grams with low coil power consumption (0.3-0.43W), ideal for weight-sensitive aerospace applications where thermal management and power budgets are critical design considerations.
- Robust Electrical Isolation: High dielectric strength (500Vrms at normal pressure) and excellent insulation resistance (>500MΩ) ensure safe, reliable operation in complex electrical environments, compatible with sensitive devices like Aviation Temperature Sensors.
- Broad Environmental Compatibility: Engineered to maintain consistent performance across extended temperature ranges and varying atmospheric conditions typical of aerospace operational environments.
Complete Technical Specifications
Electrical Performance Parameters
- Coil Power Consumption: 0.3 to 0.43 Watts
- Contact Rating & Mechanical Endurance:
- Standard Resistive Load: 1 Ampere at 28 Volts DC for 1,000,000 operations
- Low-Level Signal Load: (10-50) microamperes at (10-50) millivolts for 1,000,000 operations
- Contact Resistance Specifications:
- Maximum Initial Value: 50 milliohms (mΩ)
- Maximum Value After Life Testing: 200 milliohms (mΩ)
- Dynamic Timing Characteristics:
- Operate (Action) Time: ≤ 3 milliseconds
- Release (Drop-out) Time: ≤ 4 milliseconds
- Minimum Coil Excitation Pulse Width: 10 to 50 milliseconds
Environmental, Safety & Physical Specifications
- Dielectric Withstanding Voltage:
- At Standard Atmospheric Pressure: 500 Volts RMS, 50Hz
- Under Low-Pressure Conditions: 250 Volts RMS, 50Hz
- Insulation Resistance:
- Initial Measurement: > 500 Megohms (MΩ)
- After High-Level Endurance Testing: > 50 Megohms (MΩ)
- Mass: Less than 3 grams
- Seal Integrity (Hermeticity): Maximum allowable leakage rate: 1 × 10⁻¹ Pa·cm³/s
- Coil Voltage Options (DC): Available in standard aviation DC voltages. Contact for specific voltage requirements or integration with custom Military Aviation Connector solutions. All specifications referenced at 25°C (77°F).
Primary Applications & Replacement Scenarios
The JQ-35FH serves as a critical Aviation Contactor for Aircraft maintenance and system upgrades across multiple industries, offering unique dual-compatibility advantages.
- Legacy Aircraft System Modernization: Direct replacement for both 2525 ECE and S207 LEACH contactors in power distribution panels, fuel management systems, landing gear controls, environmental systems, and auxiliary power circuits across diverse military and commercial aviation fleets.
- Unmanned Aerial Systems (UAS/Drones): Essential for motor controller enable/disable functions, payload power management (sensor systems, communication payloads), battery bus switching, and system safety interlocks in advanced commercial and defense drone platforms.
- Rail & Ground Transportation Systems: Integration into locomotive control systems, railway signaling equipment, and ground support vehicles where high vibration resistance, extended operational life, and dual-system compatibility significantly simplify maintenance logistics.
- Industrial Automation & Control: Deployment in harsh-environment control panels, renewable energy systems, and automated manufacturing equipment, often working alongside Military Pressure Sensors and Industrial Power Relays for comprehensive control solutions.
- Aerospace Test & Qualification Equipment: Provides reliable load switching in test benches, environmental chambers, and qualification systems for Aerospace Components, including Aviation Haulage Pressure Sensors and Military Electronic Horns.
- Defense & Military Platform Sustainment: Critical for maintaining operational readiness of legacy military systems that utilize either 2525 ECE or S207 LEACH contactors in communication systems, vehicle electronics, and specialized defense equipment.
Step-by-Step Replacement Protocol
- System Identification & Verification: Confirm the existing component is either 2525 ECE or S207 LEACH series. Document the specific model and system configuration before proceeding with replacement.
- Safety Preparation & System Shutdown: Execute complete system power-down, implement proper electrical isolation, and follow all applicable safety procedures including lock-out/tag-out (LOTO) protocols for the specific platform.
- Legacy Component Removal: Clearly document or photograph the existing wiring configuration. Carefully disconnect all wires from the old contactor terminals. Remove mounting hardware and extract the unit without damaging surrounding components or wiring.
- JQ-35FH Installation: Position the new JQ-35FH contactor in the identical mounting location. Secure firmly using appropriate hardware, ensuring proper alignment and no mechanical stress on the housing or terminals.
- Electrical Reconnection: Reconnect all wires to their corresponding terminals on the JQ-35FH as per documentation. For systems utilizing complex control logic with PCB Signal Relays, verify signal compatibility and retest timing parameters if necessary.
- Pre-Operational Verification & Testing: Before applying main power, conduct thorough visual inspection for proper installation. Use a multimeter to verify proper continuity and insulation resistance. Momentarily energize the coil to confirm positive mechanical actuation.
- System Commissioning & Performance Validation: Restore system power gradually according to platform-specific procedures. Initiate phased testing: begin with no-load checks, progress to low-power functional tests, and conclude with full operational testing under monitored conditions to validate all performance parameters.
Strategic Procurement & Operational Benefits
Sourcing the JQ-35FH from YM delivers exceptional value through simplified logistics, enhanced reliability, and comprehensive technical support for legacy system maintenance.
- Inventory Consolidation & Simplification: Replaces two common legacy part numbers with a single, high-quality component, reducing inventory complexity by up to 50% for affected systems and streamlining maintenance procedures.
- Enhanced Supply Chain Resilience: Provides a reliable, manufacturer-direct source for obsolete components, mitigating supply chain disruption risks and ensuring operational continuity for diverse legacy systems.
- Reduced Total Cost of Ownership: Extended service life, reduced maintenance frequency, and simplified inventory management directly lower long-term operational expenses and improve maintenance efficiency by reducing part number proliferation.
- Performance Enhancement through Modern Engineering: While maintaining perfect mechanical and electrical compatibility, the JQ-35FH incorporates contemporary materials and manufacturing advancements that often deliver improved performance characteristics over aging original components.
- Technical Partnership & Cross-Platform Expertise: Access to YM's extensive experience across multiple product lines including New Energy Relays, Automotive Relays, and Aviation Microswitches provides comprehensive application support for diverse integration scenarios.
- Quality Assurance & Certification Support: Full manufacturing traceability, comprehensive testing documentation, and rigorous quality control procedures provide confidence in component performance and support certification requirements for regulated industries.
- Future-Proofing Legacy Systems: Provides a reliable, sustainable solution for maintaining operational capability of aging systems while offering potential performance benefits and extended service life compared to original components.
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