Durable Design Military Metal Relay GJRW-112MA 27V for Military Applications
Product Overview
The GJRW-112MA 27V is a premium-grade Military Aviation Metal DC Relay engineered specifically for mission-critical defense and aerospace systems. As part of our Military Metal Sealing Relay series, it features a robust hermetically sealed metal package that delivers exceptional durability and reliability in the harshest operational environments. Designed for applications requiring uncompromising performance, this relay provides reliable switching for Aircraft Engine controls, drone avionics, military communication equipment, and other high-integrity systems where component failure is not an option.
Product Features & Advantages
This relay represents the pinnacle of military-grade electromechanical switching technology, offering distinct advantages over commercial-grade PCB Board Relays and standard Automotive Relays:
- Military-Grade Hermetic Sealing: Full metal-can weld sealing provides complete protection against moisture, dust, sand, salt spray, and chemical contaminants, ensuring reliable operation in desert, maritime, and high-altitude environments.
- Extreme Environmental Durability: Engineered to withstand severe vibration (up to 30G), mechanical shock, and wide temperature fluctuations from -65°C to +125°C, meeting rigorous military operational standards.
- High-Speed Performance: With fast action time (≤4ms) and release time (≤4ms), this relay ensures rapid circuit switching for time-critical military and aviation control systems.
- Dual-Load Capability: Designed to handle both standard power loads (1A at 28V DC) and sensitive low-level signal circuits (10-50µA at 10-50mV), making it versatile for various system requirements.
- Optimized Power Efficiency: Low coil power consumption (0.3-0.43W) minimizes heat generation and reduces power system burden in portable and battery-operated military equipment.
- Lightweight Compact Design: Weighing under 3 grams with a TO-5 package footprint, it offers high reliability without compromising on space or weight constraints in modern military electronics.
The GJRW-112MA shares the same rigorous design philosophy as our other specialized components like the Polarized Relay JH-2S and Sealed magnetic Latching Relay series, ensuring consistency across our military-grade product line.
Technical Specifications
Detailed performance parameters for system integration and qualification purposes:
Electrical Parameters
- Rated Coil Voltage: 27V DC (24V variant available)
- Contact Configuration: SPST-NO (Single Pole Single Throw Normally Open) or similar military standard configuration
- Contact Rating:
- Standard Resistive Load: 1A at 28V DC
- Low-Level Signal Load: 10-50 µA at 10-50 mV
- Coil Power Consumption: 0.3W to 0.43W
- Initial Contact Resistance: ≤ 50 mΩ
- Contact Resistance After Life Test: ≤ 200 mΩ
- Insulation Resistance: > 500 MΩ (initial, normal atmosphere)
Performance Characteristics
- Operational Life: Minimum 100,000 cycles at rated resistive load
- Action Time: ≤ 4 milliseconds
- Release Time: ≤ 4 milliseconds
- Incentive Pulse Width: 10 to 50 milliseconds
- Dielectric Strength:
- Normal Atmosphere: 500 Vr.m.s., 50Hz
- Low Pressure Conditions: 250 Vr.m.s., 50Hz
Physical & Environmental Specifications
- Package Type: TO-5 Metal Can
- Sealing Performance: Leakage Rate ≤ 1.0 × 10⁻³ Pa·cm³/s
- Weight: < 3 grams
- Operating Temperature Range: -65°C to +125°C (standard military grade)
Application Scenarios
The GJRW-112MA relay is specified for applications where reliability directly impacts mission success and personnel safety:
- Military Aerospace Systems: Aircraft and helicopter flight control systems, weapon system interfaces, navigation equipment, and cockpit instrumentation switching.
- Unmanned Combat Systems: Military drone (UAV/UAS) power distribution, payload activation (cameras, sensors, countermeasures), and communication system control modules.
- Ground Military Vehicles: Armored vehicle electronic systems, communication encryption units, missile launch controls, and mobile command post equipment.
- Naval Defense Systems: Shipboard electronics, radar system interfaces, and submarine control systems where saltwater corrosion resistance is critical.
- High-Reliability Industrial: While distinct from our Industrial Power Relay line, the GJRW-112MA may be specified for industrial applications in extreme environments such as oil & gas exploration, mining, or remote monitoring stations.
Implementation Guidelines
For optimal performance and reliability in military systems, follow these integration steps:
- Circuit Design Review: Verify the relay's load characteristics match your application requirements, considering inrush currents and inductive kickback.
- PCB Layout Considerations: When used as a board-mounted component, provide adequate clearance and creepage distances per IPC-2221 standards for high-reliability applications.
- Coil Drive Circuit Protection: Implement proper flyback diode or transient voltage suppression for the coil circuit to protect driving electronics from voltage spikes.
- Thermal Management: Ensure adequate airflow or heat sinking if operating at maximum rated current in high ambient temperatures.
- Environmental Sealing Verification: For chassis-mounted applications, ensure the external sealing of the enclosure maintains the relay's internal hermetic integrity.
Certifications & Compliance
The GJRW-112MA is designed and manufactured to meet rigorous international military and aerospace standards:
- Performance compliant with relevant sections of MIL-PRF-6106 for established reliability electromagnetic relays
- Environmental testing per MIL-STD-810 methods for vibration, shock, and temperature extremes
- Materials and processes compliant with RoHS and REACH environmental directives
- Manufactured under a quality management system suitable for military and aerospace applications
For specific program certification requirements (such as qualification to exact military part numbers), please consult with our technical sales team.
Customization Options
YM recognizes that military and aerospace programs often require tailored solutions. For the GJRW-112MA platform, we offer the following customization capabilities for qualified OEM/ODM partners:
- Coil Voltage Variants: Custom coil voltages beyond the standard 24V/27V DC
- Special Pin Configurations: Modified lead materials, plating, or forming to match specific PCB or connector interfaces
- Testing & Screening: Additional screening tests such as burn-in, thermal cycling, or hermeticity verification to specific program requirements
- Marking & Traceability: Custom part numbering, date coding, and lot traceability to meet military documentation standards
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Production Process & Quality Assurance
Every GJRW-112MA relay undergoes a rigorous, controlled manufacturing process:
- Material Selection: All materials are sourced from qualified suppliers with full traceability and military-grade certification where applicable.
- Precision Manufacturing: Critical components are manufactured with tight tolerances using automated CNC and stamping processes.
- Clean Room Assembly: Relay assembly occurs in a controlled environment (Class 100,000 or better) to prevent contamination of critical contact surfaces.
- Laser Hermetic Sealing: The final sealing process uses automated laser welding in an inert atmosphere to achieve the specified leak rate.
- Comprehensive Testing: 100% of production units undergo electrical testing (contact resistance, operate/release time, dielectric strength) and sample lots undergo environmental and life testing.
- Final Inspection & Packaging: Visual inspection, final electrical verification, and ESD-safe packaging complete the process.
Frequently Asked Questions (FAQ)
Q1: What is the main advantage of the GJRW-112MA over commercial relays for military applications?
A: The primary advantage is its hermetically sealed metal construction, which provides definitive protection against environmental factors that would degrade or destroy commercial plastic-encapsulated relays. This, combined with its military-grade components and testing, ensures reliable operation in extreme conditions.
Q2: Can this relay be used in satellite or space applications?
A: While the GJRW-112MA exhibits excellent performance in high-altitude and low-pressure environments, space applications typically require additional screening for outgassing and radiation tolerance. We offer space-grade variants with additional testing—please inquire for specific space qualification requirements.
Q3: How does the GJRW-112MA compare to a Solid State Relay for military use?
A: Each technology has advantages. The GJRW-112MA offers true galvanic isolation, lower conduction losses at higher currents, and inherent resistance to electromagnetic pulses (EMP). Solid State Relays provide faster switching, silent operation, and potentially longer life for high-frequency switching. The choice depends on the specific application requirements.
Q4: What is the typical lead time for military-qualified batches?
A: Lead times for fully tested and documented military-grade relays typically range from 12-20 weeks for standard configurations, depending on order quantity and specific testing requirements. Custom configurations may require additional time for qualification.
Q5: Do you provide reliability data and failure rate predictions?
A: Yes. For serious military and aerospace programs, we can provide MTBF (Mean Time Between Failures) predictions based on industry-standard models (MIL-HDBK-217F or similar) and actual test data from our reliability testing programs.
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