Product Attributes

Model No.: KJZC-4M

Brand: YM

Output: Dc

Relay Type: Telecom

Ambient Temperature: -65℃~125℃

Sinusoidalvibration: 30g,(10～3000)Hz

Random Vibration: 0.4g²/Hz,239.1m/s²

Cyclone: 4kPa

Coil Powerconsumption: ≤1W

Dielectric Withstandvoltage: Normal atmospheric pressure:1000/500Vr.m.s., 50HzLow pressure: 350 Vr.m.s., 50 Hz

Contact Load Andlife: Resistance, 2A,28 Vd.c., 1×10⁵ timesResistance, 0.3A,115 Va.c., 1×10⁵ times Low level, (10-50) μA, (10-50) mV, 1×10⁵ turns inductive, 0.5A,28 Vd.c.,0.2H,1×10⁵ turns Light load, 0.16A,28 Vd.c., 1×10⁵ times

Insulation Resistance: ≥ 1 0 0 0 0 MQ

Weight: ≤10g

Contact Resistance: Initial value ≤50mQ Life test after ≤100mQ

Tightness: Leakage rate ≤10³ Pa · cm³/s

Military Metal Relay KJZC-4M | Direct CII HFW Series Replacement

Product Overview

The KJZC-4M is a high-reliability Military Metal Sealing Relay designed as a precise, drop-in replacement for the CII brand HFW series. This 27VDC Aviation DC Relay ensures seamless compatibility and uninterrupted performance in critical systems where the original HFW relay is specified, providing a robust and dependable solution for aviation, military, and industrial applications.

Technical Specifications

Model: KJZC-4M
Compatibility: Direct replacement for CII HFW Series
Coil Voltage: 27VDC Standard
Contact Configuration: DPDT (2 Form C)
Contact Rating: 1A @ 28VDC (Resistive)
Coil Power: 0.3W - 0.43W
Electrical Life: ≥100,000 operations
Switching Time: ≤4ms Operate & Release
Insulation Resistance: >500MΩ
Weight: <3g

Key Features & Advantages

Exact HFW Series Replacement: Guaranteed form, fit, and functional compatibility, enabling straightforward system maintenance and upgrades without engineering modifications.
Hermetically Sealed Metal Construction: Provides superior environmental shielding and durability compared to standard PCB Signal Relays, ensuring long-term reliability in harsh operating conditions.
Military-Grade Design & Materials: Built as a robust Military Electromagnetic Relay to withstand vibration, shock, and temperature extremes common in aerospace and defense environments.
Optimized for PCB Integration: Designed for reliable mounting and soldering as a PCB Board Relay in compact drone avionics and aircraft control boards.
Proven Longevity: Engineered for a minimum of 100,000 switching cycles, reducing maintenance frequency and total lifecycle costs for critical systems.
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Installation Procedure

Confirm Compatibility: Verify the existing relay is a CII HFW series model with a 27VDC coil.
System Safety: Power down the equipment completely before beginning the replacement.
Careful Removal: Desolder or unplug the original HFW relay from its PCB footprint or socket.
Direct Installation: Install the KJZC-4M, ensuring perfect pin-to-pin alignment and orientation match.
Functional Testing: Restore power and test the circuit to validate proper switching operation.

Application Scenarios

This relay delivers critical value by providing a reliable, high-quality alternative for maintaining legacy and current systems. Primary applications include: Industrial automation and control panels using CII components, Military ground support and test equipment, Legacy aviation instrumentation and communication systems, Drone (UAV) flight controller power management, and other high-reliability applications. It serves as a robust substitute where environmental factors exceed the limits of standard DPDT 8Pin 27V Relays or Industrial Power Relays.

Quality Assurance

Manufactured in our ISO 9001 certified facility under stringent quality controls. Each KJZC-4M undergoes 100% electrical testing and batch reliability validation to ensure performance meets or exceeds the original HFW series specifications, consistent with our Military Metal Relay production standards.

Customization Services

We offer OEM/ODM support for specialized projects. While designed as a direct replacement, customizations such as specific lead forms, marking, or additional environmental screening can be arranged for volume procurement, similar to services for our Polarized Relay JH-2S.

FAQ

Q: Is the KJZC-4M electrically and mechanically identical to the HFW relay?
A: Yes, it is designed as a direct form, fit, and function replacement, ensuring full compatibility in all key operational aspects.

Q: What is the primary benefit of using this replacement relay?
A: It provides a reliable, readily available source for maintaining systems that depend on the CII HFW series, ensuring operational continuity and reducing downtime.

Q: Can this relay be used in new designs not based on HFW components?
A: While its heritage is as a replacement, its military-grade construction and proven reliability make it a viable and robust choice for new high-reliability PCB Board Relay designs requiring its specific performance profile.

Q: Are samples available for testing and verification?
A: Yes, we provide samples to qualified B2B clients for evaluation, compatibility testing, and performance validation in their specific applications.