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Littelfuse

Littelfuse CCMR-4-1/2 Time-Delay Fuse 4.5A 600VAC 250VDC Class CC

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PRODUCT DOCUMENTATION

Product Information

Technical specifications, features, applications and purchasing information.

Technical Specifications

Brand	Littelfuse
Model Number	CCMR-4-1/2
Product Category	Time-Delay Fuse
Series	CCMR
Fuse Class	Class CC
Fuse Type	Dual-Element Time-Delay
Current Rating	4-1/2 A (4.5 A)
AC Voltage Rating	600 VAC
DC Voltage Rating	250 VDC
AC Interrupting Rating	200 kA RMS Symmetrical
DC Interrupting Rating	20 kA
Body Material	Melamine
Cap Material	Nickel-Plated Bronze
Diameter	10.3 mm
Overall Length	38.1 mm
Approvals	UL Listed, CSA Certified
Country of Origin	Mexico

Key Features

4.5 A Current Rating

The CCMR-4-1/2 is a 4-1/2 A rating within the Littelfuse CCMR fuse series.

600 VAC Class CC Fuse

The CCMR-4-1/2 is a Class CC fuse rated for AC circuits up to 600 VAC.

250 VDC Rating

Littelfuse specifies 250 VDC for CCMR current ratings from 4-1/2 A through 10 A.

Dual-Element Time-Delay

The CCMR series uses dual-element time-delay construction designed to withstand sustained starting currents of small motors.

High Interrupting Capacity

The series is rated at 200 kA RMS symmetrical AC interrupting capacity and 20 kA DC interrupting capacity.

Class CC Cartridge Format

The 4.5 A fuse uses a compact cylindrical format approximately 10.3 mm in diameter and 38.1 mm in overall length.

Applications

Motor branch circuit protection
Small motor circuit protection
Industrial control circuits
Motor control panels
Machine control equipment
Industrial electrical panels
Automation equipment circuits
Branch circuit overcurrent protection

Purchase Information

We support online purchase of the Littelfuse CCMR-4-1/2 Time-Delay Fuse. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods.

Frequently Asked Questions

What is Littelfuse CCMR-4-1/2?
Littelfuse CCMR-4-1/2 is a CCMR series dual-element time-delay Class CC fuse rated at 4.5 A.

What is the current rating of CCMR-4-1/2?
The current rating is 4-1/2 A, equivalent to 4.5 A.

What is the AC voltage rating?
The CCMR-4-1/2 is rated for operation up to 600 VAC.

What is the DC voltage rating?
Littelfuse specifies 250 VDC for CCMR ratings from 4-1/2 A through 10 A.

Is CCMR-4-1/2 a time-delay fuse?
Yes. The CCMR series uses dual-element time-delay construction designed for motor and motor branch circuit protection.

What fuse class is CCMR-4-1/2?
The CCMR-4-1/2 is within the UL Class CC portion of the CCMR series.

What is the AC interrupting rating?
The documented AC interrupting rating is 200 kA RMS symmetrical, with Littelfuse also specifying a 300 kA self-certified AC rating for the series.

What is the DC interrupting rating?
The documented DC interrupting rating is 20 kA.

What are the dimensions of CCMR-4-1/2?
The Class CC cartridge format is approximately 10.3 mm in diameter and 38.1 mm in overall length.

What materials are used in this CCMR current range?
Littelfuse specifies a melamine body with nickel-plated bronze caps for CCMR ratings from 2/10 A through 30 A.

What applications is the CCMR series intended for?
Littelfuse specifies the CCMR series for motor and motor branch circuit protection, particularly where sustained motor starting currents must be accommodated.

What should be checked before ordering CCMR-4-1/2?
Check the complete CCMR-4-1/2 model designation, 4.5 A current rating, 600 VAC or 250 VDC circuit requirements, Class CC format, interrupting rating, dimensions and fuseholder requirements before purchasing.

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