Littelfuse CCMR040 Class CC Fuse 40A 600VAC 200kA Interrupting Rating Slo-Blo Time Delay Class CD

This innovative fuse from Littelfuse, part of the CCMR series, is engineered specifically for motor branch circuit protection, showcasing exceptional current limiting capabilities. By rapidly halting damaging short-circuit currents, it effectively reduces the risks associated with heating and magnetic effects, outperforming traditional mechanical protective devices. The dual-element time-delay design offers superior protection while consuming significantly less space—up to 70% in panel-mounting applications—making it a compact solution for demanding environments. Capable of handling ampere ratings from 35 to 60, this fuse stands out in its category, offering robust performance with an interrupting rating of 200,000 A.I.R. at 600 VAC. Its Type II protection ensures no damage is inflicted on both NEMA-rated and sensitive IEC motor circuit components. This combination of efficiency and advanced protection design makes the Littelfuse CCMR040 an essential choice for modern electrical systems seeking reliability and space optimization.

• Extremely current-limiting to reduce short-circuit damage faster than mechanical devices
• Dual-element, time-delay design engineered for motor branch circuit protection
• Type 2 'No Damage' protection for NEMA and IEC motor components
• High interrupting rating of 200,000 A at 600 VAC for enhanced safety
• Compatible across 35 to 60 A amperage range in a compact size
• Panel mount space reduction up to 70% compared to other fuse classes
• Certified to UL, CSA, and CE standards for compliance and reliability
• Self-certified 20 kA interrupting rating at DC for versatile protection
• Class CC/CD fuse compatibility for motor branch circuit protection

• Voltage: 600 V AC, 250 V DC
• Interrupting Rating: 200,000 A @ 600 V AC
• Ampere Rating: 40 A
• Opening Type: Slo-Blo/Time Lag (T)/Time Delay
• Fuse Class: Class CD
• Interrupting Rating DC: 20 kA Littelfuse self-certified
• Voltage Rating DC Detailed: 250 V (35–60 A), 300 V (2/10–10 A), 500 V (12–30 A)
• Ampere Range: 0.2–60 A
• Dimensions: 1.50 in x 0.41 in (0–30 A), 1.88 in x 0.85 in (35–60 A) length x diameter
• Watt Loss at 100% Rated Current: 1.39–2.75 W depending on amp rating (e.g. 30 A = 2.75 W)
• Watt Loss at 80% Rated Current: 0.83–1.62 W depending on amp rating (e.g. 30 A = 1.62 W)
• Current Limitation: Extremely current-limiting
• Protection Type: Dual-element, time-delay, Type 2 "No Damage" protection
• Certification: UL Listed, CSA Certified, CE Certified, RoHS
• Applicable Standards: UL 248-4 Class CC (2/10–30 A), UL 248-18 Class CD (35–60 A)
• Environmental Compliance: RoHS Compliant (2/10–30 A)
• Country of Origin: Mexico

Certification

Datasheets

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Application Notes