Product Attributes

Model No.: JZC-4MH

Brand: YM

Output: Dc

Relay Type: Telecom

Ambient Temperature: -65℃~85℃

Relativehumidity: relativehumidity

Cyclone: 4kPa

Sinusoidalvibration: 10g,(10～500)Hz

Random Vibration: 0.2g²/Hz,169.1m/s²

Coil Powerconsumption: ≤1.2W

Dielectricwithstandvoltage: Normal atmospheric pressure:500Vr.m.s., 50Hz Under low pressure: 300Vr.m.s., 50Hz

Contact Load Andlife: Resistance, 5A,28 Vd.c., 2×10⁴ timesResistance, 2A,28 Vd.c., 1×10⁵ times Resistance, 2A,115 Va.c., 2×10⁴ times (unearthed housing) Low level, (10-50) μA, (10-50) mV, 1×10⁵ times

Insulationresistance: ≥ 1 0 0 0 MQ

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

Weight: ≤11g

Tightness: Leakage rate ≤10³ Pa ·cm³/s

Military Metal Relay JZC-4MH 27V: Premium Replacement for CII/HFW5C Series

YM introduces the JZC-4MH, a high-performance Military Metal Sealing Relay engineered as a direct, reliable replacement for the CII HFW5C series relays. Available in 5V, 12V, 24V, and 27V coil options, this hermetically sealed Aviation DC Relay delivers military-grade durability and precision switching for critical aerospace, defense, and industrial applications. As a drop-in PCB Board Relay solution, it ensures seamless legacy system maintenance and enhanced reliability in new designs.

Product & Replacement Demonstration

Military Metal Sealed Relay JZC-4MH for Aviation Applications

Technical Specifications

Electrical Characteristics

Coil Voltage Options: 5VDC, 12VDC, 24VDC, 27VDC
Coil Power Consumption: (0.3 ~ 0.43)W
Contact Configuration: DPDT (8-pin configuration)
Contact Rating & Life:
- Resistive Load: 1A @ 28V DC, ≥ 100,000 operations
- Low-Level Load: (10~50)μA @ (10~50)mV, ≥ 100,000 operations
Contact Resistance:
- Initial: ≤ 50mΩ
- After Life Test: ≤ 200mΩ

Performance & Environmental Specifications

Switching Time:
- Operate Time: ≤ 4ms
- Release Time: ≤ 4ms
- Minimum Pulse Width: (10~50)ms
Dielectric Strength:
- Normal Atmosphere: 500V RMS, 50Hz
- Low Pressure: 250V RMS, 50Hz
Insulation Resistance:
- Initial: > 500 MΩ
- After Endurance Test: > 50 MΩ
Weight: < 3 grams
Hermetic Seal Performance: Leakage rate ≤ 1.0 × 10⁻³ Pa·cm³/s

Key Features & Advantages

Direct HFW5C Series Replacement: Engineered for perfect form-fit-function compatibility with CII HFW5C relays, enabling straightforward legacy system upgrades without circuit redesign.
Military-Grade Metal Hermetic Sealing: Full metal enclosure with welded sealing provides complete protection against moisture, dust, and corrosive gases, ensuring long-term reliability in harsh environments.
Multi-Voltage Compatibility: Available in four standard coil voltages (5V, 12V, 24V, 27V) to match various system requirements, making it a versatile Industrial Power Relay solution.
High-Speed Precision Switching: Fast operate/release times (≤4ms) ensure accurate signal control in critical applications, functioning effectively as a high-performance PCB Signal Relay.
Superior Contact Reliability: Special contact materials and design maintain stable low resistance through extensive operational cycles, even under low-level signal conditions.
Lightweight Robust Construction: Weighing under 3g while maintaining structural integrity, ideal for weight-sensitive aviation and drone applications.

Implementation as HFW5C Replacement

Identify Original Specifications: Determine the exact coil voltage and pin configuration of the existing HFW5C relay in your system.
Select Corresponding JZC-4MH Model: Choose the JZC-4MH variant with matching coil voltage (5V, 12V, 24V, or 27V).
Physical Compatibility Verification: Confirm identical pin layout and mounting dimensions between the original and replacement relay.
Direct Installation: Remove the old HFW5C relay and insert the JZC-4MH into the same socket or PCB position.
System Testing: Power on and test functionality under typical operating conditions to verify seamless performance.

Application Scenarios

The JZC-4MH serves as a critical component in demanding sectors where reliability is non-negotiable:

Legacy Aerospace System Maintenance: Direct replacement in avionics, flight control systems, and aircraft instrumentation originally equipped with HFW5C series relays.
Military & Defense Electronics: Communication systems, radar equipment, weapon controls, and military vehicle electronics requiring Military Electromagnetic Relay reliability.
Unmanned Aerial Systems: Power distribution, flight controller interfaces, and payload controls in commercial and military drones.
Industrial Control Systems: Precision control in manufacturing equipment, railway signaling, and power generation where environmental resilience is critical.
Test & Measurement Equipment: Reliable signal switching in laboratory and field testing instruments requiring consistent performance.

Value Proposition for Procurement

Solve Obsolescence Challenges: Provides a reliable, long-term supply alternative for discontinued HFW5C series relays.
Reduce System Downtime: Drop-in replacement capability minimizes maintenance windows and associated costs.
Enhance System Reliability: Modern manufacturing techniques and materials often yield improved consistency versus aging original components.
Simplify Inventory Management: Single source for multiple voltage requirements reduces SKU complexity.

Quality Assurance & Standards

YM manufactures the JZC-4MH series under rigorous quality control protocols aligned with military and aerospace reliability requirements. Our production processes incorporate testing methodologies that validate performance against the original HFW5C specifications while often exceeding them in key durability metrics.

Customization Options

Beyond standard replacements, we offer tailored solutions:

Special Voltage Requirements: Custom coil voltages outside standard ranges for unique applications.
Enhanced Testing Protocols: Additional screening tests including extended burn-in, thermal cycling, or vibration testing.
Modified Pin Configurations: Custom pin arrangements for specialized mounting requirements.
Bespoke Relay Solutions: Engineering support for custom Sealed magnetic Latching Relay designs or other specialized Military Metal Relay configurations through our ODM services.

Precision Manufacturing Process

Material Selection & Preparation: High-grade metals and specialty materials selected for durability and performance.
Precision Component Fabrication: Automated manufacturing of contacts, springs, and enclosures with tight tolerances.
Clean Room Assembly: Critical assembly conducted in controlled environments to prevent contamination.
Hermetic Sealing: Advanced welding techniques create permanent environmental seals.
Comprehensive Testing: Each unit undergoes electrical, mechanical, and environmental validation.

Frequently Asked Questions

Q1: How does the JZC-4MH compare electrically to the original HFW5C relay?

A1: The JZC-4MH is engineered to match or exceed the HFW5C's key electrical parameters including coil voltage/power, contact rating, switching times, and insulation specifications. It provides equivalent or superior performance in all critical operational aspects.

Q2: Is any circuit modification needed when replacing HFW5C with JZC-4MH?

A2: Typically no modifications are required. The JZC-4MH is designed as a direct drop-in replacement with identical pin configuration and electrical characteristics. However, we recommend verifying compatibility with your specific application requirements.

Q3: What advantages does this metal-sealed relay offer over plastic-encapsulated alternatives for Automotive Relay applications?

A3: Metal hermetic sealing provides superior long-term protection against temperature extremes, humidity, and chemical exposure common in automotive under-hood and industrial environments. This ensures more reliable performance over the product lifecycle compared to plastic-sealed relays.

Q4: Can the JZC-4MH be used in new designs alongside other technologies like Solid State Relay components?

A4: Yes. The JZC-4MH complements Solid State Relay solutions in hybrid designs where its specific advantages—galvanic isolation, low contact resistance, and immunity to voltage transients—are beneficial. Our engineers can advise on optimal relay technology selection for your application.

Q5: What is your production capacity and lead time for bulk replacement orders?

A5: As a specialized manufacturer, we maintain flexible production capacity to support both small replacement batches and large-volume orders. Standard variants typically have 4-8 week lead times, with expedited options available. Contact us with your specific quantity and timeline requirements.