Littelfuse CCMR040 CCMR Series Class CC Time-Delay Fuse, 40A

Littelfuse CCMR040 CCMR Series Class CC Time-Delay Fuse, 40A

The Littelfuse CCMR Series is a Class CC dual-element, time-delay fuse engineered specifically for motor branch circuit protection, rated 40A at 600VAC and 250VDC. This fuse delivers Type II protection (no damage) to both NEMA-rated and the more sensitive IEC motor circuit components, combining a compact Class CD package size with a 200,000 ampere interrupting rating (A.I.R.) for dependable performance under high fault-current conditions. As a true dual-element time-delay CC fuse, it is purpose-built where both reliable overload protection and fast-acting short-circuit protection are required in a single device.

Key Features

• Ampere Rating: 40A, rated for use on circuits up to 600VAC and 250VDC.
• Class CC Dual-Element Design: Compared to other UL Listed fuses, Class CC dual-element fuses are the most current-limiting, rating for rating, and are engineered specifically for motor branch circuit protection.
• Type II Protection: Provides no-damage protection to both NEMA-rated and IEC motor circuit components.
• 200,000 A.I.R.: Reliable interruption of all overcurrents up to 200,000 amperes.
• Time-Delay Opening: Slo-Blo/Time Lag (T)/Time Delay characteristic suited to handle motor inrush current without nuisance opening.
• Space-Saving Package: Class CD package size provides superior protection in a fraction of the space of other fuse classes; replacing 600V three-pole 30A Class R fuse blocks with Class CC fuse blocks reduces panel-mounting space by approximately 70%.
• Extremely Current Limiting: Reduces damage caused by heating and magnetic effects of short-circuit currents, stopping damaging short-circuit faults faster than any mechanical protective device.

Certifications & Compliance

• UL Listed
• RoHS Compliance Documentation Available

Technical Specifications

• VAC (V): 600
• VDC (V): 250
• Ampere Rating (A): 40

Typical Applications

• Motor Branch Circuit Protection
• NEMA-Rated and IEC Motor Control Circuits
• Panelboard and Motor Control Center Installations
• Industrial and Commercial Electrical Systems
• Space-Constrained Panel Retrofits and Upgrades

Why Littelfuse?

Littelfuse CCMR Series fuses are purpose-built for demanding motor circuit protection, combining true dual-element time-delay operation with a 200,000 A.I.R. interrupting rating in a compact Class CD footprint. For electricians and panel builders who need code-compliant, current-limiting overcurrent protection without sacrificing panel space, the CCMR Series delivers dependable, UL Listed performance backed by Littelfuse engineering.