DiversiTech, 7-CRNR30, Dual Element Fuse, 30 A, 250 V, 200,000 A

7-CRNR30 Dual Element Time Delay Fuse – HVAC Circuit Protection Rated for Demanding Electrical Loads

The DiversiTech 7-CRNR30 Dual Element Time Delay Fuse is built for over-current protection in HVAC and industrial motor-driven systems. Its dual-element construction is designed to handle momentary inrush currents without nuisance tripping, making it well-suited for compressors, blower motors, and other inductive loads.

Rated for 30 amps at 250 VAC with a 200,000 A interrupt capacity, this Class RK5 fuse offers dependable fault current interruption in high-demand circuits. It minimizes equipment damage during short circuits and allows sustained overloads within defined parameters, supporting both safety and system uptime.

Performance Features

• ✅ Dual Element Construction – Provides extended time-delay characteristics to accommodate motor startup surges without compromising protection.
• ✅ High Interrupt Rating – 200,000 A RMS Symmetrical ensures suitability for fault-prone circuits and service panels in commercial HVAC systems.
• ✅ Class RK5 Compliance – Meets U.L. 248-12 standards for industrial branch circuit protection and selective coordination.
• ✅ Consistent Overload Response – Limits current safely during low-level faults while isolating equipment from catastrophic failures.
• ✅ Universal Form Factor – Compatible with standard fuse holders and disconnects in HVAC control panels.

Technical Specifications

• Amperage Rating: 30 A
• Voltage Rating: 250 VAC
• Interrupt Capacity: 200,000 A (RMS Symmetrical)
• Fuse Class: RK5
• Element Type: Dual

Installation Considerations

Installation of the 7-CRNR30 should be performed by qualified personnel to ensure conformity with NEC Article 240 and local code requirements. Confirm load characteristics before installation and ensure compatibility with existing fuse blocks or disconnect switches. Proper torque and contact pressure are critical to long-term thermal performance and fault interruption.

Application Suitability

Contractor Use: Ideal for service trucks, maintenance programs, and new construction where motor protection with time-delay capability is specified. Reduces the likelihood of nuisance service calls due to transient load spikes while maintaining system protection integrity.

Trade-Focused Performance

Engineered for operational continuity in HVAC units, motor circuits, pump controls, and electrical distribution systems, this fuse ensures that protection devices match the electrical characteristics of the system. Used widely in both OEM assemblies and field retrofits.