Aviation Switch LLS2 35A 28V 2P

Product Overview

The LLS2 35A 28V 2P is a heavy-duty Military Aviation Switch featuring dual-pole configuration with 35A current capacity at 28V DC, engineered for robust power control applications in drone systems, aircraft engines, train controls, and Aviation Electronics. This dual-pole switch provides simultaneous control of two independent high-current circuits, offering enhanced safety and reliability for critical power distribution systems. As a premium component in YM's comprehensive aviation solutions portfolio—complementing products like Hydraulic Circuit Breakers and Industrial Power Relays—the LLS2 delivers exceptional high-current switching performance for mission-critical applications.

 

Technical Specifications

• Model Number: LLS2
• Current Rating: 35A continuous at 28V DC per pole
• Voltage Rating: 28V DC (aviation standard)
• Pole Configuration: 2-pole independent switching capability
• Total Current Capacity: 70A combined (2 poles × 35A)
• Switch Type: Military aviation dual-pole high-current switch
• Coil Power Consumption: (0.3 - 0.43) Watts
• Electrical Life: Minimum 100,000 switching operations at rated load
• Contact Resistance: Initial ≤50mΩ per contact; After durability testing ≤200mΩ
• Switching Speed: Action time ≤4ms; Release time ≤4ms
• Synchronization: Both poles actuate simultaneously for coordinated control
• Dielectric Strength: 500V RMS @ 50Hz (standard); 250V RMS @ 50Hz (low pressure)
• Insulation Resistance: >500 MΩ initially; >50 MΩ after environmental testing
• Inter-Pole Isolation: High electrical isolation between both poles
• Thermal Performance: Engineered for efficient heat dissipation with dual poles at 35A
• Weight: Optimized for high-current dual-pole applications
• Environmental Sealing: Maximum leakage rate ≤ 1.0 x 10⁻³ Pa·cm³/s
• Operating Temperature: Performance validated for aviation conditions, compatible with Aviation Temperature Sensor ranges
• Terminal Design: Heavy-duty terminals for secure 35A connections per pole

Product Features & Competitive Advantages

1. Dual-Pole High-Current Design: Combines 35A current capacity with two independent poles, providing 70A total switching capability with enhanced safety through circuit isolation—complementing systems using Industrial Power Relays for comprehensive power management.
2. Perfect Pole Synchronization: Both poles actuate simultaneously with millisecond precision, ensuring coordinated switching of two high-current circuits for safe and reliable system operation.
3. Advanced Thermal Management: Engineered heat dissipation design handles thermal loads from both poles operating at full 35A capacity simultaneously, preventing overheating and ensuring long-term reliability.
4. Military-Grade Construction: Reinforced mechanical design and heavy-duty contacts withstand the combined thermal and mechanical stresses of dual-pole high-current switching operations.
5. Superior Inter-Pole Isolation: Exceptional electrical isolation prevents interference between the two independent circuits, even when handling high currents on adjacent poles.
6. Advanced Environmental Sealing: Hermetic sealing (≤10⁻³ Pa·cm³/s) provides comprehensive protection for both poles in demanding aerospace environments, matching the protection standards of Aviation Oil Sealed Valves.
7. Arc Suppression Optimization: Special contact geometry and materials minimize arcing during simultaneous switching of dual high-current circuits, extending contact life and reducing electromagnetic interference.

Installation and Wiring Procedure for Dual-Pole High-Current Applications

1. Current Requirement Analysis: Calculate current requirements for both circuits to ensure neither exceeds 35A continuous rating, with appropriate derating for environmental conditions.
2. Proper Wire Sizing: Use appropriately sized aviation-grade wire (typically 10 AWG) for each 35A circuit with proper insulation rating.
3. Secure High-Current Mounting: Mount switch on reinforced panel using all provided hardware to withstand mechanical forces from dual high-current connections.
4. Dual-Circuit Planning: Plan wiring layout to accommodate two separate high-current circuits, maintaining proper separation and identification.
5. High-Current Terminal Connections: Make secure connections to both heavy-duty terminals using proper crimping techniques designed for 35A applications.
6. Thermal Management Planning: Ensure adequate ventilation around switch installation, particularly important when both poles operate at high currents simultaneously.
7. Sealing Integrity Verification: Confirm environmental seals are properly engaged to protect both internal circuits.
8. Comprehensive Dual-Circuit Testing: Test each pole independently at 35A, then test coordinated switching of both poles before system integration with components like Hydraulic Circuit Breakers or power distribution systems.

Application Scenarios

The LLS2 35A 28V 2P Military Aviation Switch is engineered for demanding dual-circuit power control applications:

• Aircraft Dual-Power Distribution: Simultaneous control of redundant power systems, main and backup circuits, or dual-bus power distribution in commercial and military aircraft.
• UAV Redundant System Control: Coordinated switching of dual propulsion systems, redundant sensor arrays, or primary/secondary power circuits in advanced unmanned aerial vehicles.
• Rail Vehicle Dual-System Control: Simultaneous control of traction and braking systems, primary and auxiliary power circuits, or dual lighting systems in train applications.
• Military Redundant Equipment: Dual-circuit control for weapon systems with redundant power, communication systems with backup circuits, or tactical equipment with dual power sources.
• Industrial Dual-Machine Control: Simultaneous control of two production machines, processing equipment pairs, or dual auxiliary systems in manufacturing facilities.
• Aircraft Ground Power Management: Dual-circuit control for ground power units with redundant outputs, or maintenance equipment with primary and backup power circuits.
• Emergency Power System Management: Coordinated switching of primary and backup power circuits, or dual emergency lighting circuits in critical infrastructure.
• Test Equipment Dual-Channel Control: Dual-circuit control for sophisticated test configurations, laboratory equipment with redundant channels, or research systems requiring synchronized dual switching.

Value Proposition for Dual-Circuit Power Applications

• Enhanced Safety Through Isolation: Dual-pole design provides electrical isolation between circuits, enhancing system safety and preventing single-point failures from affecting both circuits.
• Space and Cost Efficiency: Combines two 35A switches in one compact unit, reducing panel space requirements by approximately 40% compared to individual switches.
• Perfect Circuit Coordination: Ensures millisecond-precise synchronization of two high-current circuits, eliminating timing discrepancies that could cause system issues.
• Simplified System Architecture: Reduces wiring complexity, connection points, and potential failure modes in dual-circuit power systems.
• Improved Reliability: Reduced component count and simplified interconnections increase overall system reliability and simplify troubleshooting.
• Weight Optimization: Lower total weight compared to two individual high-current switches, important for aerospace applications.
• Operator Interface Optimization: Provides single-point control for dual-circuit operations, reducing training requirements and operator errors.

Certifications & Compliance

The LLS2 35A 28V 2P Military Aviation Switch is designed and manufactured to meet or exceed performance requirements for dual-pole high-current switching components in aerospace applications, including military specifications for redundant system controls, aviation requirements for dual-circuit power distribution, and industrial standards for high-current switching applications. Our manufacturing processes comply with rigorous quality management systems specifically addressing dual-pole synchronization accuracy and inter-pole isolation, and we provide comprehensive technical documentation including full dual-pole performance test reports to support customer qualification, certification, and compliance efforts.

Customization & OEM/ODM Services

YM offers specialized customization options for the LLS2 dual-pole switch series:

• Custom current ratings (20A, 30A, 40A) for specific application requirements
• Special voltage ratings (12V, 24V, 48V DC) while maintaining current capabilities
• Enhanced synchronization timing for specific system requirements
• Custom inter-pole isolation specifications for sensitive adjacent circuits
• Advanced thermal management features for extreme operating conditions
• Special terminal configurations for different wiring standards and connection methods
• Custom switching sequences and interlock configurations
• Application-specific testing and validation for dual-pole high-current performance

Our demonstrated OEM and ODM expertise in power switching components, proven across our Automotive Relay and New Energy Relay product lines, ensures we can develop tailored dual-pole switch solutions that precisely match your specific current and voltage requirements.

Production Process & Dual-Pole Quality Assurance

1. Dual-Pole Component Manufacturing: Precision manufacturing of two independent high-current contact systems with exact mechanical alignment.
2. Synchronization Mechanism Engineering: Mechanical linkage design ensuring perfect simultaneous operation of both poles.
3. Inter-Pole Isolation Implementation: Installation of high-grade insulation barriers between both poles to prevent electrical interference.
4. Comprehensive Dual-Circuit Testing: Individual testing of each pole at 35A followed by synchronized testing of both poles simultaneously.
5. Synchronization Accuracy Validation: Precise timing measurement to verify millisecond synchronization accuracy between both poles.
6. Thermal Performance Testing: Validation of heat dissipation with both poles operating at full 35A current simultaneously.
7. High-Current Endurance Testing: Extended operation at rated current to verify long-term reliability of both poles.
8. Final Quality Assurance: Complete inspection including dimensional verification, mechanical function testing, individual pole performance validation, synchronization accuracy verification, thermal performance assessment, and full manufacturing traceability.

System Integration and Complementary Dual-Circuit Components

The LLS2 35A 28V 2P Military Aviation Switch is designed for integration into sophisticated dual-circuit power control systems. For complete system solutions, consider pairing with YM's complementary products such as Aviation Copper Fuse Holders with dual circuits for comprehensive protection, Military Pressure Sensors for system monitoring, and Solid State Relays for automated control of loads managed by the dual-pole switch. This integrated approach enables the creation of reliable, high-performance dual-circuit power control systems for aerospace, defense, and industrial applications where circuit isolation, perfect synchronization, and high-current capacity are critical requirements.