Premium Direct Replacement for AJ C400 LEACH Relays
YM presents the JQ-30M Military Aviation Contactor, a superior form-fit-function replacement engineered to seamlessly substitute legacy AJ C400 LEACH relays in critical aerospace and defense applications. This high-reliability component is specifically designed for demanding switching operations in drone systems, aircraft engines, and other aviation, train, and aircraft power circuits. Manufactured with the precision and durability synonymous with our Military Metal Relay and High Power Aviation Contactor product families, the JQ-30M ensures uninterrupted performance where system integrity is paramount.
Key Features & Design Advantages
The JQ-30M is engineered as a direct, performance-matched replacement that meets or exceeds the specifications of the original AJ C400 LEACH component. It incorporates modern manufacturing techniques and materials, reflecting our expertise in producing Solid State Relays and Hydraulic Circuit Breakers.
- Exact Mechanical & Electrical Interchangeability: Designed as a direct drop-in replacement for AJ C400 LEACH contactors, facilitating seamless system maintenance, upgrades, and lifecycle management without modification.
- Optimized Contact Performance: Features exceptionally low initial contact resistance (≤50mΩ) for efficient power transfer and minimal heat generation. Maintains stable performance over its lifespan (≤200mΩ post-test), a hallmark of our PCB Board Relay quality standards.
- High-Speed Switching Capability: Delivers fast and reliable action time (≤3ms) and release time (≤4ms), essential for precise control in flight-critical avionics and automated processes.
- Ruggedized Hermetic Sealing: Incorporates a military-grade sealed enclosure with a maximum leakage rate of ≤10⁻¹ Pa·cm³/s, providing robust protection against environmental contaminants, moisture, and pressure differentials, similar to our Aviation Oil Sealed Valves.
- Extended Operational Lifespan: Rated for 1,000,000 cycles at its full rated load (1A, 28V DC), significantly reducing maintenance intervals and total lifecycle costs for operators.
- Lightweight & Energy-Efficient Design: Weighing less than 3 grams with low coil power consumption (0.3-0.43W), it is ideal for weight-sensitive aerospace applications and systems where power efficiency is critical.
- Superior Electrical Isolation: High dielectric strength (500Vrms at normal pressure) and excellent insulation resistance (>500MΩ) ensure safe and reliable operation in complex systems, compatible with sensitive devices like Aviation Temperature Sensors.
Complete Technical Specifications
Electrical Performance Parameters
- Coil Power Consumption: 0.3 Watts to 0.43 Watts.
- Contact Rating & Mechanical Endurance:
- Resistive Load Rating: 1 Ampere at 28 Volts DC for 1,000,000 operations.
- Low-Level (Dry Circuit) Rating: (10 to 50) microamperes (μA) at (10 to 50) millivolts (mV) for 1,000,000 operations.
- Contact Resistance:
- Maximum Initial Value: 50 milliohms (mΩ).
- Maximum Value After Life Testing: 200 milliohms (mΩ).
- Switching Timing Characteristics:
- Operate (Action) Time: 3 milliseconds or less.
- Release (Drop-out) Time: 4 milliseconds or less.
- Minimum Coil Excitation Pulse Width: 10 to 50 milliseconds.
Environmental, Safety & Physical Specifications
- Dielectric Withstanding Voltage:
- At Standard Atmospheric Conditions: 500 Volts RMS, 50Hz.
- Under Low-Pressure (High-Altitude) Conditions: 250 Volts RMS, 50Hz.
- Insulation Resistance:
- Initial under Standard Conditions: Greater than 500 Megohms (MΩ).
- After High-Level Endurance Testing: Greater than 50 Megohms (MΩ).
- Mass: Less than 3 grams.
- Seal Integrity (Hermeticity): Maximum permissible leakage rate is 1 x 10⁻¹ Pascal cubic centimeters per second (Pa·cm³/s).
- Coil Voltage (DC): Available in standard aviation DC voltages. Contact for specific requirements or integration with custom Military Aviation Connector solutions. All specifications are referenced at an ambient temperature of 25°C (77°F).
Target Applications & Industries
The JQ-30M serves as a critical Aviation Contactor for Aircraft and beyond, designed for reliability in mission-critical systems across multiple sectors.
- Legacy Aircraft System Sustainment & MRO: Direct replacement for AJ C400 LEACH contactors in power distribution panels, fuel management systems, landing gear controls, and cockpit instrumentation in both military and commercial aircraft.
- Unmanned Aerial Vehicles (UAVs) & Drones: Essential for power bus switching, motor controller enable/disable functions, payload activation (cameras, sensors), and battery management in advanced drone platforms.
- Rail & Ground Transportation Systems: Deployment in locomotive control units, signaling systems, and ground support equipment where high vibration resistance and long-term reliability are required.
- Industrial Automation & Energy Systems: Used in harsh-environment control panels, renewable energy systems, and automated machinery, often interfacing with Military Pressure Sensors and Industrial Power Relays for comprehensive control.
- Aerospace Test & Measurement Equipment: Provides reliable load switching in test benches and qualification rigs for other Aerospace Components, such as Aviation Haulage Pressure Sensors or Military Electronic Horns.
Step-by-Step Installation & Replacement Procedure
- System Identification & Safe Shutdown: Verify the existing component part number (AJ C400 LEACH). Execute a complete and safe system power-down, following all applicable lock-out/tag-out (LOTO) procedures.
- Removal of Legacy Contactor: Clearly document or photograph the existing wiring configuration. Carefully disconnect all wires from the terminals of the old contactor. Remove the mounting hardware to extract the unit.
- Installation of JQ-30M Contactor: Position the new JQ-30M contactor in the identical mounting location. Secure it firmly using appropriate hardware, ensuring no mechanical stress is applied to the housing or solder terminals.
- Electrical Reconnection: Reconnect all wires to their corresponding terminals on the JQ-30M as per your documentation. In systems utilizing control logic with PCB Signal Relays, confirm signal compatibility.
- Pre-Operational Verification & Testing: Before applying main power, conduct a thorough visual inspection. Use a multimeter to verify proper continuity and check for short circuits. Momentarily energize the coil to confirm positive mechanical actuation.
- System Commissioning & Performance Validation: Restore system power. Initiate a phased test sequence: begin with no-load checks, proceed to low-power functional tests, and conclude with full operational testing under monitored conditions to validate that all performance parameters meet or exceed the original system requirements.
Strategic Procurement Benefits
Sourcing the JQ-30M from YM delivers significant value and competitive advantages to global OEMs, MRO facilities, and system integrators.
- Mitigated Supply Chain Risk: Provides a reliable, high-quality alternative source for obsolete or difficult-to-source AJ C400 LEACH components, enhancing supply chain resilience.
- Reduced Total Cost of Ownership (TCO): The combination of extended service life, high reliability, and competitive pricing directly lowers long-term maintenance, inventory, and operational costs.
- Assured Performance with Modern Engineering: While maintaining perfect backward compatibility, the JQ-30M benefits from contemporary materials and manufacturing processes, potentially offering improved consistency and electrical characteristics.
- Streamlined Logistics & Inventory Management: Consolidating procurement with a trusted manufacturer like YM for critical components, including New Energy Relays and Aviation Microswitches, simplifies supply chain logistics.
- Access to Cross-Industry Expertise: Leverage YM's broad engineering knowledge from Automotive Relay and Metal Sealing Relay production to receive comprehensive application support and system integration guidance.
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