Eaton 3CJ Fuse Cartridge 3A 600VAC/250VDC - Equivalent & Substitute Parts

Part Overview

The Eaton 3CJ is a fast-blow cartridge fuse rated for 3A at 600VAC/250VDC, designed for electrical and industrial applications requiring holder-mounted protection. This part is classified as obsolete, making identification of active equivalent components essential for system maintenance and component replacement. The 3CJ operates with a breaking capacity of 200kA at rated voltage and is approved by CSA standards.

Substiute Parts

3CJ

Eaton - Bussmann Electrical DivisionIn Stock: 8863CJ Datasheet

Current PartRFQ

KLSR003.T

Littelfuse Inc.In Stock: 777KLSR003.T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the Eaton 3CJ is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 3A (exact match required)
• Voltage Rating: 600VAC / 250VDC (exact match required)
• Response Time: Fast Blow (exact match required)
• Fuse Type: Cartridge (exact match required)
• Breaking Capacity: 200kA minimum at rated voltage
• Mounting: Holder-mounted cartridge configuration
• Approval Standards: CSA or equivalent recognized certification

The Littelfuse KLSR003.T meets all primary electrical specifications. Physical dimension variation (5.000" L vs. 2.244" L) requires verification of holder compatibility before substitution.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse KLSR003.T is the identified equivalent for the obsolete Eaton 3CJ based on matching electrical specifications: 3A current rating, 600VAC/250VDC voltage ratings, fast-blow response, and 200kA breaking capacity. The KLSR003.T holds active product status with expanded certifications (CE, CSA, UL) compared to the 3CJ (CSA only), providing broader compliance coverage.

The primary consideration for substitution is physical dimension compatibility. The KLSR003.T cartridge length is 5.000" compared to the 3CJ at 2.244". Confirmation that the existing holder accommodates the longer cartridge length is required before implementation.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse KLSR003.T directly replace the Eaton 3CJ in existing installations?

A: Electrical compatibility is confirmed across all rated parameters. Physical compatibility depends on holder design. The KLSR003.T is 2.756" longer than the 3CJ. Verify that the fuse holder accepts the longer cartridge length before substitution.

Q: What is the significance of the RK1 class rating on the KLSR003.T?

A: RK1 is a fuse class designation indicating specific performance characteristics. The 3CJ does not specify a class rating in the provided data. Both parts meet the 200kA breaking capacity requirement at rated voltage.

Q: Are there differences in approval standards between these parts?

A: The 3CJ carries CSA approval. The KLSR003.T carries CE, CSA, and UL approvals. For applications requiring specific regional compliance, the KLSR003.T provides broader certification coverage.

Q: What is the difference between the breaking capacity ratings listed for the KLSR003.T?

A: The KLSR003.T specifies 200kA AC and 20kA DC breaking capacity. The 3CJ lists 200kA at rated voltage without AC/DC differentiation. Both meet the 200kA AC requirement for this application class.

Q: Is the KLSR003.T RoHS compliant?

A: The KLSR003.T is ROHS3 compliant. RoHS compliance status for the 3CJ is not provided in the available data.