C310T-2-R-BKF Equivalent & Substitute Parts

Part Overview

The C310T-2-R-BKF is a 2A 250VAC ceramic cartridge fuse manufactured by Eaton - Electronics Division. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing maintenance and new design applications. The fuse features a non-standard axial cartridge configuration with slow-blow response characteristics, designed for through-hole mounting in electronic protection circuits.

Substiute Parts

C310T-2-R-BKF

Eaton - Electronics DivisionIn Stock: 1102C310T-2-R-BKF Datasheet

Current PartRFQ

0877002.MXEP

Littelfuse Inc.In Stock: 10900877002.MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the C310T-2-R-BKF is determined by strict equivalence across the following critical parameters:

• Current Rating: 2 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity @ Rated Voltage: 35 A (exact match required)

The substitute part 0877002.MXEP manufactured by Littelfuse Inc. satisfies all critical electrical and mechanical parameters. Physical dimensions vary slightly between the main part and substitute, reflecting manufacturing tolerances within the non-standard axial cartridge category. Both components are rated for identical electrical performance and carry overlapping international approvals.

Parameter Comparison

Engineering Selection Recommendations

The 0877002.MXEP from Littelfuse Inc. is the direct electrical equivalent for the obsolete C310T-2-R-BKF. Selection of this substitute is based on:

• Electrical Equivalence: Identical current rating (2 A), voltage rating (250 V AC), breaking capacity (35 A), and response time (Slow Blow)
• Product Status: The substitute is active and currently manufactured, ensuring long-term availability
• Compliance: Both components carry VDE approval. The substitute holds cULus certification, providing regulatory coverage for North American and international markets
• Mechanical Compatibility: Both components are through-hole mounted ceramic cartridge fuses with non-standard axial configuration, suitable for direct circuit board integration

Physical dimensions differ slightly between the two parts. Circuit board design must accommodate the substitute's smaller envelope (0.142" Dia x 0.394" L versus 0.157" Dia x 0.453" L). This dimensional difference does not affect electrical performance or functional compatibility in standard fuse holder applications.

Frequently Asked Questions (FAQ)

Q: Can the 0877002.MXEP directly replace the C310T-2-R-BKF in existing designs?

A: Yes. Both components share identical electrical specifications: 2 A current rating, 250 V AC voltage rating, 35 A breaking capacity, and slow-blow response. The substitute is electrically and functionally equivalent. Physical dimensions are slightly smaller, which is compatible with standard through-hole fuse holder designs.

Q: What is the significance of the different DC Cold Resistance values?

A: The C310T-2-R-BKF has 30 mOhms resistance, while the 0877002.MXEP has 0.035 Ohms (35 mOhms). This minor difference falls within acceptable tolerances for ceramic cartridge fuses and does not affect circuit protection performance or thermal characteristics under normal operating conditions.

Q: Are there approval agency differences between the two parts?

A: The C310T-2-R-BKF carries CQC, cURus, KTL, and VDE approvals. The 0877002.MXEP carries cULus and VDE approvals. Both components meet VDE standards. The substitute's cULus certification provides equivalent regulatory recognition for North American applications. Specific application requirements may necessitate verification of approval agency alignment with regional standards.

Q: How do the Melting I²t values differ, and does this matter?

A: The C310T-2-R-BKF has a Melting I²t of 27.2, while the 0877002.MXEP has 24.6. Both values are within the acceptable range for 2 A slow-blow ceramic fuses and indicate comparable thermal response characteristics. This difference does not affect substitution suitability for standard circuit protection applications.

Q: What is the operating temperature range for the substitute?

A: The 0877002.MXEP operates across -55°C to 125°C. The C310T-2-R-BKF operating temperature range was not specified in the original documentation. The substitute's wide operating temperature range ensures compatibility with most industrial and commercial electronic applications.

Q: Is the substitute RoHS compliant?

A: Yes. The 0877002.MXEP is RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.