AN24-Z Military Aviation Switch:
High-Reliability SPDT 4P Switch for Aerospace Control Systems
The AN24-Z Military Aviation Switch is a precision-engineered Single Pole Double Throw (SPDT) 4-pole switching device designed for critical control applications in drones, aircraft engines, and aviation systems. As a key component in YM's portfolio of Military Metal Relays and aerospace solutions, this switch delivers uncompromising reliability in the most demanding environments. Its multi-pole design provides enhanced circuit control capabilities, making it ideal for complex switching matrices in Military Aviation Encoding Switch systems and redundant safety circuits.
Engineered with the same rigorous standards as our Aviation Oil Sealed Valves and Hydraulic Circuit Breakers, the AN24-Z combines low power consumption, hermetic sealing, and military-grade durability to ensure consistent performance where failure is not an option.
Technical Specifications
Electrical Parameters
- Switch Configuration: SPDT (Single Pole Double Throw), 4-Pole Design
- Coil Power Consumption: (0.3 ~ 0.43)W – Energy-efficient operation
- Contact Load & Operational Life:
- Resistive Load: 1A at 28V DC for 100,000 cycles minimum
- Low-Level Signal: (10~50)μA, (10~50)mV for 100,000 cycles
- Contact Resistance:
- Initial Value: ≤ 50mΩ per contact
- After Endurance Testing: ≤ 200mΩ per contact
- Switching Speed:
- Action Time: ≤ 4ms
- Release Time: ≤ 4ms
- Incentive Pulse Width: (10～50) ms
Isolation & Physical Properties
- Dielectric Strength:
- Normal Atmospheric Conditions: 500V RMS, 50Hz
- Low Pressure/High Altitude Conditions: 250V RMS, 50Hz
- Insulation Resistance:
- Initial: > 500 MΩ
- After High-Level Life Test: > 50 MΩ
- Weight: < 3 grams – Ultra-lightweight for aerospace applications
- Hermetic Sealing: Leakage rate ≤ 1 × 10⁻³ Pa·cm³/s – Ensures protection against moisture and contaminants
- Temperature Reference: Electrical specifications referenced at 25°C (77°F)
Product Features & Advantages
- Multi-Pole SPDT Design: Four independent SPDT circuits in one compact package, offering space-saving advantages and simplified wiring for complex control systems, complementing our range of PCB Board Relays.
- Enhanced Reliability: Rated for 100,000+ operational cycles at full load, providing long-term reliability that reduces maintenance frequency and total cost of ownership.
- Dual-Purpose Contact Capability: Handles both standard power switching (1A/28VDC) and sensitive low-level signals without degradation, ideal for mixed-signal aviation systems.
- Military-Grade Sealing: Hermetic sealing protects against environmental factors, matching the durability standards of our Aviation Cold Air Solenoid Valves and other sealed Aerospace Components.
- Fast Response Time: Sub-4ms switching speed ensures rapid system response critical for flight control and safety applications.
- High-Altitude Performance: Maintains specified dielectric strength even at reduced atmospheric pressure, essential for high-altitude aircraft and UAV operations.
- Optimized Weight: At under 3 grams, contributes significantly to weight reduction goals in modern aerospace design.
- Vibration Resistant Construction: Engineered to withstand the harsh vibration profiles common in aircraft engines and drone propulsion systems.
System Integration Guidelines
For optimal performance when integrating the AN24-Z into your aviation control system, follow these recommended steps:
- System Compatibility Assessment: Verify that your control voltage matches the coil specifications and that all four poles' combined load does not exceed thermal derating limits.
- Mechanical Installation: Mount securely using provided mounting features. Ensure proper clearance from heat-generating components and consider vibration dampening if necessary.
- Electrical Connection Planning: Plan wiring harness considering the 4-pole configuration. For low-level signal applications (μA/mV), implement noise suppression techniques similar to those used with Aviation Temperature Sensors.
- Sealing Verification: If installed in a pressurized or environmentally sealed enclosure, verify the integrity of the overall system's seals after installation.
- Comprehensive Testing: Before final system integration, test each pole independently for contact resistance, switching time, and insulation resistance to ensure all circuits meet specifications.
- System Validation: Perform integrated system tests under simulated operational conditions to validate performance in the actual application context.
Application Scenarios
The AN24-Z's multi-pole SPDT design makes it exceptionally versatile for complex aerospace control applications:
- Aircraft Engine Control Systems: Multi-channel fuel valve control, ignition sequencing, and sensor array switching in turbine and piston engines.
- Drone/UAV Flight Control: Multi-motor control, payload management (camera, sensors, delivery mechanisms), and flight mode selection circuits.
- Avionics Switching Matrices: Signal routing in communication systems, navigation equipment mode selection, and redundancy switching in safety-critical systems.
- Ground Support & Testing Equipment: Multi-channel test point selection in aircraft diagnostic systems and engine test stands.
- Military Systems Integration: Weapon system arming circuits, countermeasure deployment control, and integration with Military Aviation Band Switch assemblies.
- Related High-Reliability Applications: Suitable for complex control systems where multiple PCB Signal Relays would traditionally be used, offering space and weight savings.
Value Proposition for Procurement Teams: The AN24-Z consolidates multiple switching functions into a single, reliable component, reducing part count, simplifying inventory management, and decreasing potential failure points. Sourcing from YM provides access to a manufacturer with expertise across New Energy Relays, Automotive Relays, and specialized aerospace components, ensuring consistent quality and technical support.
Certifications & Compliance
The AN24-Z is manufactured in facilities adhering to aerospace-grade quality management systems. While specific certification markings can be applied per customer requirements, the component is designed and tested to meet or exceed performance criteria aligned with:
- Relevant MIL-STD specifications for environmental stress, vibration, and shock resistance
- Industry standards for reliability and performance of electromechanical switches in aerospace applications
- RoHS compliance available as standard or upon specific request
Our quality documentation supports customer qualification processes, and we can provide necessary test reports and certificates for integration into certified aerospace platforms.
Customization Options
YM offers flexible customization options for the AN24-Z to meet specific application requirements:
- Electrical Customization: Specific coil voltage requirements, custom contact materials for specialized loads
- Termination Options: Various lead lengths, wire types, or integration with specific Military Aviation Connectors
- Mechanical Modifications: Custom mounting configurations, orientation markings, or enclosure adaptations
- Testing & Screening: Additional quality screening, extended burn-in testing, or environmental stress screening (ESS)
- Identification & Marking: Custom part numbers, date codes, lot tracing, or customer-specific labeling
- Packaging: ESD-safe packaging, bulk packaging, or custom packaging for automated assembly processes
Production & Quality Assurance Process
Each AN24-Z switch undergoes a rigorous, documented manufacturing and testing process:
- Material Selection & Inspection: Aerospace-grade materials are sourced and verified against stringent specifications
- Precision Component Manufacturing: Critical components are manufactured to tight tolerances in controlled environments
- Automated Assembly: Multi-pole assemblies are completed using specialized fixtures ensuring consistent alignment
- Hermetic Sealing Process: Advanced sealing techniques are applied followed by mandatory leak testing
- Comprehensive Electrical Testing: 100% testing of all four poles for contact resistance, timing parameters, coil characteristics, and dielectric strength
- Environmental Sampling Tests: Batch sampling for life cycle testing, vibration resistance, and thermal cycling
- Final Quality Audit: Comprehensive inspection before secure, protective packaging
This process reflects our commitment to quality across all product lines, from specialized Solid State Relays to complex aerospace switching solutions.
Frequently Asked Questions (FAQ)
Q1: What are the advantages of the 4-pole SPDT configuration in Aviation Applications?
A1: The 4-pole design allows control of multiple circuits simultaneously with a single actuation, reducing component count, saving space and weight, and improving system reliability by minimizing connection points. This is particularly valuable in complex control systems like those integrating multiple Aviation Magnetic Valves or sensor arrays.
Q2: Can different poles of the AN24-Z handle different types of loads simultaneously?
A2: Yes, the design allows for mixed loading. For example, one pole could switch a power load (1A/28VDC) while another handles a low-level sensor signal (μA/mV), providing design flexibility for complex systems.
Q3: How does the hermetic sealing benefit long-term reliability in aviation environments?
A3: The hermetic seal prevents moisture ingress, contamination from fuels or lubricants, and protects against corrosion. This is critical for maintaining electrical performance over the component's lifespan in harsh environments, similar to requirements for Aviation Oxygen Valves.
Q4: What testing is performed to ensure reliability across all four poles?
A4: Each pole undergoes individual testing for contact resistance, timing, and insulation. Additionally, we perform cross-pole isolation testing and batch sampling for full environmental stress testing to ensure consistent performance across all circuits.
Q5: Is the AN24-Z suitable for safety-critical applications where redundancy is required?
A5: While the AN24-Z is highly reliable, safety-critical aviation applications often require separate, redundant components rather than multiple poles within a single device. We can advise on system architecture using our range of components, including Military Pressure Sensors and other redundant system elements.
Q6: What support do you provide for design integration?
A6: We provide detailed technical documentation, application notes, and engineering consultation. For complex integrations, we can offer tailored advice based on our experience with similar applications across our product range, including Industrial Power Relays and aerospace-specific components.
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