Military Aviation DC Metal Relay KJRC-200M

Product Overview

The KJRC-200M is a premium Military Metal Sealing Relay engineered specifically for demanding aerospace and defense applications. This Aviation DC Relay serves as a direct, form-fit-function replacement for the legacy CII 3SBC series, offering enhanced reliability and performance in critical systems. As a specialized Military Electromagnetic Relay, it provides robust 1A switching capability at 27VDC with superior sealing against extreme environments (4.4Kpa rating). Manufactured by YM with 18+ years of expertise in precision relay production, this unit represents the next generation of PCB Board Relay technology for mission-critical applications.

Military Aviation DC Metal Relay KJRC-200M

Military Metal Sealed Relay KJRC-200M 1A 27VDC Replace of  CII Relay 3SBC series

KJRC-200M DC Metal Relay 4.4Kpa  for 3SBC Series CII Military Aviation Use

Military Metal Sealed Relay KJRC-200M 1A 27VDC Replace CII 3SBC

Metal Relay Designed for Aviation and Military Applications

Aviation Relay with Military Grade Metal Design

Military Aviation Relay for Drone,Aircraft Engine PCB Board 

High quality Aviation relay for Engine,Train,Plane maintain

Product Images

 

Technical Specifications

• Rated Coil Voltage: 27VDC
• Contact Rating: 1A @ 28VDC resistive
• Coil Power Consumption: 0.3-0.43W
• Low Level Contact Capacity: (10-50)μA, (10-50)mV, 1×10⁶ operations
• Contact Resistance: Initial ≤50mΩ; Post-life ≤200mΩ
• Operate/Release Time: ≤4ms each
• Dielectric Strength: 500Vr.m.s. @ normal atmosphere; 250Vr.m.s. @ low pressure
• Insulation Resistance: >500MΩ normal; >50MΩ post high-level life test
• Weight: <3g
• Sealing Performance: Leakage rate ≤10⁻³ Pa·cm³/s
• Pressure Rating: 4.4Kpa for high-altitude/low-pressure operation
• Replaces: CII 3SBC series relays (direct drop-in replacement)

Key Features & Advantages

1. Direct Legacy Replacement: Pin-for-pin compatible with CII 3SBC series, eliminating redesign costs and simplifying upgrades.
2. Superior Hermetic Sealing: Full metal enclosure with ≤10⁻³ Pa·cm³/s leakage rate ensures reliable operation in vacuum/low-pressure aviation environments.
3. Military Durability: Constructed with SUS304/316 stainless steel components to withstand extreme shock, vibration, and thermal cycling.
4. Enhanced Contact Life: Rated for 1 million operations at full load, significantly extending maintenance intervals compared to standard relays.
5. Optimized Magnetic Circuit: Precision engineering minimizes power consumption while maintaining fast ≤4ms switching for critical timing applications.
6. Manufacturing Consistency: SGS-audited factory processes ensure every KJRC-200M meets identical performance specifications, batch after batch.

Application Scenarios

This Military Metal Relay is designed for systems where failure is not an option:

• Aircraft & UAV Systems: Engine control units, fuel pump switching, landing gear control, and avionics power management
• Military Vehicle Electronics: Communication equipment, surveillance system power control, and weapon system interfaces
• Industrial Control Systems: High-reliability automation, safety interlock circuits, and precision instrumentation requiring PCB Signal Relay performance
• Drone Flight Controllers: Motor control switching, payload activation, and autonomous system power distribution
• Legacy System Modernization: Direct replacement in existing CII 3SBC installations without modification to PCB layouts or connectors

Installation & Integration Guide

1. System Verification: Confirm your existing system uses CII 3SBC series relays and note the specific mounting configuration.
2. PCB Inspection: Verify pad layout matches the KJRC-200M footprint before removing legacy components.
3. Desoldering: Carefully remove existing 3SBC relay using appropriate temperature-controlled equipment.
4. Preparation: Clean PCB pads and ensure proper solderability for new relay installation.
5. Placement: Align KJRC-200M with correct pin orientation (notch/pin 1 indicator).
6. Soldering: Use lead-free solder at 320-350°C with appropriate dwell time to ensure proper connection without overheating.
7. Testing: Perform functional test at 27VDC nominal voltage before system integration.
8. Environmental Verification: For sealed applications, conduct leakage test if required by your quality procedures.

Value Proposition for Procurement

• Reduced Qualification Costs: Direct replacement eliminates extensive requalification testing for upgraded components.
• Supply Chain Security: Reliable manufacturing from an SGS-audited factory reduces risk compared to sourcing obsolete CII components.
• Extended System Life: Superior sealing and construction extend MTBF, reducing lifecycle maintenance costs.
• Technical Support: Access to engineering expertise for integration challenges and custom requirements.
• Inventory Simplification: One superior relay replaces multiple obsolete parts in your maintenance inventory.

Certifications & Compliance

• CE and UL component certifications
• Compliant with MIL-PRF-6106 Military Relay specifications
• Manufacturing facility audited by SGS International
• RoHS compliant materials and production processes
• ISO 9001:2015 certified quality management system
• Materials include SUS304/SUS316 stainless steel per MIL specifications

Customization Options

While optimized as a direct 3SBC replacement, YM offers customization for specific applications:

• Alternative coil voltages (12V, 24V, 48VDC)
• Special pin configurations or termination styles
• Enhanced sealing for specific altitude/pressure requirements
• Custom testing and screening protocols (burn-in, thermal cycling)
• Private labeling and customized packaging
• Value-added assemblies with sockets or connector kits

Our expertise extends across Automotive Relay, Flash Relay , and New Energy Relay platforms, with proven ODM/OEM experience serving global aerospace manufacturers.

Quality Assurance Process

Every KJRC-200M undergoes rigorous 7-stage quality verification:

1. Incoming material certification (SUS steel verification, contact material analysis)
2. Precision stamping and machining with statistical process control
3. Automated coil winding with tension monitoring
4. Contact assembly with precious metal alloys for optimal conductivity
5. Hermetic sealing in controlled atmosphere chambers with leak testing
6. 100% electrical testing at three temperature points (-55°C, 25°C, 125°C)
7. Final inspection and traceability documentation with lot coding

Frequently Asked Questions