Military Aviation Metal Sealed Relay KJZC-4MH

Military Metal DC Relay KJZC-4MH | 4KPa & 50g Rated | Direct HFW5A (CII) Replacement

Product Overview

The KJZC-4MH represents the pinnacle of reliability in harsh-environment switching. This Military Metal Sealing Relay is engineered as a direct, high-performance substitute for the CII HFW5A series. Designed to withstand extreme low-pressure (4KPa) and high-vibration (50g acceleration) conditions, it is the definitive choice for mission-critical Aviation DC Relay applications where standard PCB Signal Relays fail.

Technical Specifications

• Type: Hermetically Sealed Metal DPDT 8Pin 27V Relay
• Coil Voltage: 27VDC Standard
• Coil Power: 0.3W - 0.43W
• Contact Rating: 1A @ 28VDC (Resistive Load)
• Electrical Life: ≥100,000 operations
• Operate/Release Time: ≤4ms
• Environmental Rating: 4KPa (Low Pressure); 50g Vibration/Shock
• Insulation Resistance: >500MΩ
• Weight: <3g

Key Features & Advantages

• Extreme Environment Proven: Combines 4KPa sealing with 50g vibration resistance for unparalleled reliability in aerospace and defense.
• Direct HFW5A Drop-in Replacement: Ensures seamless system upgrade and maintenance without redesign.
• Superior Military Electromagnetic Relay Construction: Full metal hermetic seal protects against moisture, dust, and altitude effects.
• High-Speed Precision: ≤4ms switching enables precise control in fast-response systems like drone flight controllers.
• Long Service Life: Engineered for over 100,000 cycles, reducing lifecycle costs and maintenance downtime.

Integration Steps

1. Confirm your system uses the CII HFW5A series relay and operates at 27VDC.
2. De-energize and safely access the equipment.
3. Carefully desolder or unplug the existing HFW5A relay from the PCB Board Relay footprint.
4. Install the KJZC-4MH, ensuring perfect pin alignment and orientation.
5. Solder securely (if PCB mount) and conduct functional system tests.
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Application Scenarios

This relay is indispensable for applications demanding ultimate resilience. It delivers value by eliminating failure points in: Military drone & UAV propulsion/control systems, Aircraft engine and flight control electronics, Missile guidance systems, Satellite and high-altitude vehicle instrumentation, and Heavy machinery control where vibration exceeds the limits of standard Industrial Power Relays. It serves as a robust alternative to specialized Aviation Latching Relay solutions.

Quality & Compliance

Manufactured in our ISO 9001-certified facility, the KJZC-4MH is produced under a rigorous quality management system. Each batch undergoes strict electrical and environmental testing, adhering to principles derived from MIL-STD standards. Our expertise, honed over years producing Military Metal Relays, ensures consistent, audit-ready quality.

Customization Services

We support full OEM/ODM projects. Custom parameters such as specific coil voltages, lead types, or performance marking can be developed for volume procurement, extending the flexibility we also offer for our Polarized Relay JH-2S and New Energy Relay lines.

FAQ

Q: Is the KJZC-4MH identical in size to the HFW5A?
A: Yes, it is a direct form, fit, and function replacement.

Q: What is the significance of the 4KPa and 50g ratings?
A: 4KPa indicates reliable operation at very low pressure (high altitude). 50g certifies it can withstand extreme vibration and shock forces.

Q: What is the lead time for production orders?
A: Standard lead time is 4-6 weeks. Contact us for custom project timelines.

Q: Do you provide performance test reports?
A: Yes, standard electrical test reports are available. Specific environmental test data can be provided upon request.