Press Switch KA3 2A 250V locomotive use

Versatile 2A-250V / 4A-125V Power Switching Solution

YM's KA3 Military Aviation Switch delivers exceptional versatility with its unique dual current-voltage rating capability, making it an ideal solution for diverse power switching requirements in aerospace, defense, and industrial applications. Engineered to handle both 2A at 250V and 4A at 125V operating conditions, this switch provides design engineers with flexible options for drone power systems, aircraft engine controls, and aviation instrumentation. Manufactured with the rigorous standards applied to our Military Metal Relay and Industrial Power Relay product families, the KA3 ensures reliable performance across multiple power scenarios.

As part of YM's comprehensive aviation component ecosystem, this dual-rated switch integrates seamlessly with our range of Military Aviation Connectors and Aviation Rocker Switches, offering system designers a versatile and robust solution for varying electrical load requirements.

Product Visualization

Technical Specifications

Dual-Rating Electrical Performance

Primary Rating: 2A at 250V AC/DC for higher voltage applications
Secondary Rating: 4A at 125V AC/DC for higher current applications
Coil Power Consumption: Energy-efficient design operating between 0.3W and 0.43W
Contact Load & Lifecycle:
- Standard Operation: Rated for 1A at 28V DC resistive load as baseline, with extended ratings as specified above
- Low-Level Signal Capability: Maintains precision for sensitive (10-50)μA at (10-50)mV signals throughout its lifecycle
- Operational Life: Verified for minimum 1,000,000 cycles at rated conditions
Contact Resistance: Excellent conductivity with initial contact resistance ≤50mΩ. Post-durability testing maintains ≤200mΩ
Switching Speed: Fast response with actuation time ≤4ms and release time ≤4ms
Dielectric Strength:
- Standard Conditions: Withstands 500V RMS at 50Hz
- Low-Pressure Conditions: Rated for 250V RMS at 50Hz for high-altitude operation
Insulation Resistance: Superior isolation with >500MΩ initially and >50MΩ after accelerated life testing

Mechanical & Environmental Specifications

Dual-Rating Design: Specifically engineered to handle two distinct operating points (2A/250V and 4A/125V)
Weight: Lightweight construction under 3 grams for weight-sensitive aerospace applications
Hermetic Sealing: Advanced environmental sealing with maximum leakage rate ≤10⁻³ Pa·cm³/s. This Aviation Oil Sealed Valve-grade protection ensures reliability
Control Compatibility: Compatible with incentive pulse widths from 10ms to 50ms
Temperature Performance: Specifications characterized at 25°C with validated operation across military temperature ranges
Thermal Management: Optimized for heat dissipation at both rating points

Features & Competitive Advantages

Dual-Rating Flexibility: Unique capability to operate at 2A/250V OR 4A/125V, providing design engineers with versatile options for different power system requirements
Military-Grade Construction: Incorporates rugged design principles from our Military Electronic Horn and Military Pressure Sensor manufacturing
Optimized Contact Design: Special contact geometry and materials engineered to handle both higher voltage (250V) and higher current (4A) conditions effectively
True Hermetic Sealing: Utilizes proprietary sealing technology from our Metal Sealing Relay production for long-term environmental protection
Enhanced Arc Suppression: Advanced contact design minimizes arcing at both 250V and 125V switching points, extending contact life
Thermal Performance Optimization: Designed to dissipate heat efficiently at both higher voltage (lower current) and higher current (lower voltage) operating conditions
Application Versatility: Eliminates the need for multiple switch types in systems with varying voltage/current requirements
Easy Integration: Designed for straightforward mounting and connection, compatible with PCB Board Relay layouts and wiring for various load types

Installation & System Integration Guidelines

Application Analysis: Determine which rating (2A/250V or 4A/125V) best matches your specific circuit requirements based on actual operating conditions
Rating Selection Verification: Confirm the selected operating point (voltage and current combination) falls within the switch's dual-rating capabilities
Thermal Considerations: Ensure adequate heat dissipation in the mounting location, particularly when operating at the 4A/125V higher current rating
Secure Mounting: Mount the switch firmly using appropriate hardware, avoiding stress on the switch body or terminals
Proper Wiring: Use appropriately sized wires for the selected current rating (considering both 2A and 4A possibilities)
Environmental Sealing: Verify integrity of surrounding seals if used in exposed environments
Pre-Operational Testing: Test at the selected operating point, verifying switching performance, contact resistance, and thermal characteristics
System Validation: Integrate into final system and perform comprehensive testing at the intended operating conditions

Application Scenarios & Business Value

Primary Application Areas

Drone Power Distribution Systems: Switching between different voltage bus systems (e.g., 125V and 250V circuits) within UAV power management units
Aircraft Electrical Systems: Power switching in aircraft where both 125VAC and 250VAC systems may be present in different subsystems
Avionics Power Management: Equipment power switching where different instruments have varying voltage and current requirements
Ground Support Equipment: Test and maintenance equipment requiring switching between different power standards
Industrial Control Panels: Machinery with multiple power requirements where a single switch type can service different circuit types

Value Proposition for Engineering & Procurement

Reduces Inventory Complexity: Single component handles multiple rating requirements, reducing the number of different switch types needed in inventory
Increases Design Flexibility: Allows engineers to use the same switch across different circuit types within a system, simplifying design and documentation
Lowers Total Component Cost: Reduced need for multiple specialized switches decreases overall component costs and simplifies procurement
Enhances System Reliability: Military-grade construction ensures reliable operation across both rating ranges, reducing system failure points
Simplifies Supply Chain: Fewer part numbers to manage streamlines procurement, inventory management, and production planning
Improves Maintenance Logistics: Standardization on fewer switch types simplifies field maintenance and spare parts inventory
Accelerates Development: Design reuse across different circuit types speeds development cycles and reduces testing requirements

Manufacturing Process & Quality Assurance

The KA3 dual-rated switch undergoes specialized manufacturing processes to ensure performance at both rating points.

Dual-Rating Component Design: Contacts and internal components specifically engineered and manufactured for both 2A/250V and 4A/125V operation
Specialized Contact Fabrication: Precision manufacturing of contacts optimized for both higher voltage arc suppression and higher current thermal management
Environmental Sealing: Hermetic sealing applied using technology refined through Aviation Oil Sealed Valve production
Dual-Point Testing: Every unit undergoes automated testing at BOTH rating points (2A/250V and 4A/125V) to verify performance across the entire operating range
Thermal Performance Validation: Testing to ensure proper heat dissipation at both higher voltage and higher current conditions
Extended Lifecycle Testing: Accelerated lifecycle testing conducted at both rating points to validate durability
Final Quality Certification: Comprehensive inspection and testing before packaging with clear dual-rating identification

Compliance & Customization Services

Standards Compliance

The KA3 dual-rated switch is designed and manufactured to meet performance requirements for aerospace, military, and industrial applications. Our quality system ensures compliance with relevant standards for both voltage and current ratings.

Customization Options

YM offers extensive customization for the KA3 series, leveraging our experience with New Energy Relay and Automotive Relay systems:

Custom Rating Combinations: Alternative dual-rating configurations for specific application requirements
Voltage-Current Profile Adjustments: Modifications to optimize for specific voltage/current combinations
Terminal Configuration: Custom terminal types or arrangements for specific mounting requirements
Thermal Enhancement Options: Special heat management features for extreme operating conditions
Sealing Variations: Enhanced sealing for specific environmental challenges
Application-Specific Testing: Custom validation at specific operating points required by the application