Aviation Switch MS-300 3A 125VAC

Product Overview

The MS-300 3A 125VAC is a specialized Military Aviation Switch engineered for alternating current (AC) power control applications in drone systems, aircraft engines, train controls, and Aviation Electronics. Rated for 3A at 125V AC, this switch is specifically designed to handle the unique challenges of AC power switching, including arc suppression and voltage zero-crossing considerations. As an AC-specialized component in YM's comprehensive aviation solutions portfolio—complementing products like Hydraulic Circuit Breakers and Industrial Power Relays—the MS-300 delivers reliable AC power control for mission-critical systems operating on standard AC power networks.

Technical Specifications

• Model Number: MS-300
• Current Rating: 3A continuous at 125V AC
• Voltage Rating: 125V AC (standard AC power voltage)
• Frequency Compatibility: 50/60Hz standard (47-63Hz operational range)
• Switch Type: Military aviation AC power switch
• Power Capacity: 375VA (3A × 125V)
• Coil Power Consumption: (0.3 - 0.43) Watts
• Electrical Life: Minimum 100,000 switching operations at rated AC load
• Contact Resistance: Initial ≤50mΩ; After durability testing ≤200mΩ
• Switching Speed: Action time ≤4ms; Release time ≤4ms; AC-specific timing considerations
• Dielectric Strength: 500V RMS @ 50Hz (standard); 250V RMS @ 50Hz (low pressure)
• Insulation Resistance: >500 MΩ initially; >50 MΩ after environmental testing
• Arc Suppression: Special AC arc suppression design for 125V AC applications
• Weight: Less than 3 grams (optimized for AC 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 monitoring
• Power Factor Compatibility: Suitable for resistive and inductive loads up to 0.7 power factor

Product Features & Competitive Advantages

1. AC-Specific Design Optimization: Engineered specifically for 125V AC power applications with considerations for AC arc characteristics, voltage zero-crossing, and sinusoidal current waveforms—complementing AC systems using Solid State Relays for complete AC power management.
2. Advanced AC Arc Suppression: Special contact geometry and materials optimized for 125V AC arc suppression, extending contact life and reducing electromagnetic interference in AC power systems.
3. Military-Grade AC Performance: Designed to handle the unique challenges of AC power switching in harsh environments, including higher voltage stress and different arc characteristics compared to DC switching.
4. Superior Environmental Sealing for AC Applications: Advanced hermetic sealing (≤10⁻³ Pa·cm³/s) provides comprehensive protection while handling 125V AC power, matching the protection standards of Aviation Oil Sealed Valves.
5. Vibration-Resistant AC Contacts: Engineered to maintain reliable AC connections under vibration and shock conditions, with special consideration for AC contact dynamics.
6. Thermal Management for AC Operation: Optimized for the different thermal characteristics of AC power dissipation compared to DC applications.
7. Power Factor Compatibility: Designed to handle the challenges of switching inductive and capacitive loads commonly found in AC power systems.

Installation and Wiring Procedure for AC Applications

1. AC Power System Analysis: Verify AC voltage (125V) and current (3A maximum) requirements, including power factor considerations for inductive loads.
2. Proper AC Wiring Practices: Use appropriately rated AC wiring with proper insulation for 125V AC applications, following aviation AC wiring standards.
3. Secure AC Mounting: Mount switch using provided hardware, ensuring secure installation for AC applications that may involve vibration from AC magnetic fields.
4. AC Circuit Connection: Connect to AC power circuit observing proper phase and neutral connections where applicable for 125V AC systems.
5. Grounding Considerations: Ensure proper grounding according to AC power system requirements for safety and noise reduction.
6. Sealing Verification: Confirm environmental seals are properly engaged to protect against contaminants in AC power environments.
7. AC Functional Testing: Test with AC power source at 125V, verifying proper operation with both resistive and appropriate inductive loads.
8. System Integration Testing: Test integration with AC-powered systems and components like Hydraulic Circuit Breakers or AC control interfaces.

Application Scenarios for 125V AC Power Control

The MS-300 3A 125VAC Military Aviation Switch is engineered for AC power control applications across aerospace and related industries:

• Aircraft AC Power Distribution: Control switching for 125V AC avionics systems, cabin lighting, and auxiliary AC power circuits in commercial and military aircraft.
• UAV Ground Support Equipment: AC power control for charging systems, test equipment, and maintenance stations supporting drone operations.
• Rail Vehicle AC Systems: Control switching for 125V AC lighting, climate control, and auxiliary systems in train applications.
• Military AC Power Equipment: Power control for 125V AC communication systems, radar equipment, and tactical AC power distribution.
• Industrial AC Control Panels: Machine controls, process equipment switching, and industrial AC power distribution panels.
• Aircraft Ground Power Management: Control switching for 125V AC ground power units, maintenance equipment, and airport support systems.
• Laboratory and Test Equipment: AC power control for test stations, measurement equipment, and research systems operating on 125V AC.
• Building and Facility Controls: Aviation facility management, hangar controls, and maintenance facility AC power distribution.

Value Proposition for AC Power Applications

• AC-Specific Performance: Engineered specifically for 125V AC applications rather than adapted from DC designs, ensuring optimal performance and reliability.
• Enhanced Safety for AC Systems: Designed with AC-specific safety considerations including arc suppression and insulation requirements for 125V AC operation.
• Reliable AC Switching: Proven performance with AC power characteristics including sinusoidal waveforms, zero-crossing points, and alternating magnetic fields.
• Space-Efficient AC Control: Compact design provides 125V AC switching capability without the size of traditional AC contactors or relays.
• Cost-Effective AC Solution: Provides reliable 125V AC switching at competitive cost compared to larger AC contactors or complex relay-based solutions.
• Standardized AC Interface: Familiar switch operation for AC power control reduces training requirements and operator errors.
• Versatile Load Compatibility: Suitable for various AC load types commonly encountered in aerospace and industrial applications.

Certifications & Compliance

The MS-300 3A 125VAC Military Aviation Switch is designed and manufactured to meet or exceed performance requirements for AC power switching components in aerospace applications, including military specifications for AC power control equipment, aviation requirements for 125V AC system components, and international standards for AC switch safety and performance. Our manufacturing processes comply with stringent quality management systems specifically addressing AC switching performance validation, and we provide comprehensive technical documentation including AC-specific performance test reports to support customer qualification, certification, and compliance efforts for AC power applications.

Customization & OEM/ODM Services

YM offers extensive customization options for the MS-300 AC switch series:

• Custom AC voltage ratings (110V, 120V, 130V AC) within the design range
• Special current ratings for specific AC load requirements
• Enhanced arc suppression for specific AC load characteristics (highly inductive, capacitive)
• Special frequency compatibility (400Hz aviation standard available)
• Custom switching configurations for AC power applications
• Enhanced environmental sealing for AC power environments
• Special markings and identification for AC power applications
• Application-specific testing and validation for AC performance requirements

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 AC switch solutions that precisely match your 125V AC (or alternative) power requirements and application specifications.

Production Process & AC-Specific Quality Assurance

1. AC-Optimized Component Manufacturing: Precision manufacturing of contacts and components specifically designed for 125V AC switching characteristics.
2. AC Arc Suppression Engineering: Implementation of specialized arc control features optimized for AC voltage and current waveforms.
3. AC Performance Testing: Comprehensive testing at 125V AC with various load types (resistive, inductive) to verify AC switching performance.
4. Dielectric Testing for AC: Specialized dielectric strength testing appropriate for 125V AC insulation requirements.
5. AC Endurance Testing: Extended operation at 125V AC with typical load profiles to verify long-term AC reliability.
6. Power Factor Compatibility Testing: Validation of performance with different power factor loads commonly encountered in AC systems.
7. Frequency Response Testing: Verification of performance across the operational frequency range (47-63Hz).
8. Final Quality Assurance: Comprehensive inspection including dimensional verification, mechanical function testing, AC performance validation, safety feature verification, and complete manufacturing traceability for AC power components.

System Integration and Complementary AC Power Components

The MS-300 3A 125VAC Military Aviation Switch is designed for integration into AC power control systems. For complete AC system solutions, consider pairing with YM's complementary products such as Aviation Copper Fuse Holders with appropriate AC ratings for circuit protection, Military Pressure Sensors for system monitoring, and Solid State Relays for automated AC power control in sophisticated systems. This integrated approach enables the creation of reliable, safe AC power control systems for aerospace, defense, and industrial applications where 125V AC power control requires both performance reliability and safety assurance.