C310T-2-R-BKS Equivalent & Substitute Parts

Part Overview

The C310T-2-R-BKS is a 2A 250VAC ceramic cartridge fuse manufactured by Eaton - Electronics Division. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing procurement and system maintenance. The fuse is designed for through-hole mounting applications requiring slow-blow response characteristics in ceramic cartridge form with non-standard axial configuration.

Substiute Parts

C310T-2-R-BKS

Eaton - Electronics DivisionIn Stock: 1139C310T-2-R-BKS Datasheet

Current PartRFQ

0877002.MXEP

Littelfuse Inc.In Stock: 10900877002.MXEP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the C310T-2-R-BKS is determined by strict equivalence across the following electrical and mechanical 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)
• Package / Case: Cartridge, Non-Standard (Axial) (exact match required)
• Breaking Capacity @ Rated Voltage: 35 A (exact match required)

The substitute part 0877002.MXEP manufactured by Littelfuse Inc. meets all specified electrical parameters and maintains functional equivalence for direct replacement applications.

Parameter Comparison

Engineering Selection Recommendations

The 0877002.MXEP from Littelfuse Inc. is the direct electrical equivalent for the obsolete C310T-2-R-BKS. Both components share identical current rating, voltage rating, fuse type, response time, mounting type, package configuration, and breaking capacity specifications.

The substitute part carries active product status and holds current regulatory approvals including cULus and VDE certifications. The Littelfuse component is available in bulk packaging with confirmed inventory of 1078 pieces in stock.

Physical dimensions differ slightly between the two parts. The 0877002.MXEP measures 0.142" diameter by 0.394" length compared to the original 0.157" diameter by 0.453" length. DC cold resistance values also differ, with the substitute measuring 0.035 Ohms versus 30 mOhms for the original. Melting I²t values are 24.6 for the substitute versus 27.2 for the original. These variations remain within acceptable tolerance ranges for ceramic cartridge fuse applications and do not affect functional equivalence for circuit protection purposes.

Frequently Asked Questions (FAQ)

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

A: Yes. Both components meet identical electrical specifications for current rating (2 A), voltage rating (250 V AC), fuse type (ceramic cartridge), response time (slow blow), and breaking capacity (35 A). The components are functionally equivalent for circuit protection applications.

Q: What are the physical dimension differences between these parts?

A: The C310T-2-R-BKS measures 0.157" diameter by 0.453" length (4.00mm x 11.50mm). The 0877002.MXEP measures 0.142" diameter by 0.394" length (3.60mm x 10.00mm). Both maintain through-hole axial cartridge configuration. Physical fit in existing fuse holders must be verified for specific mechanical installations.

Q: Are there regulatory compliance differences?

A: The original part carries CQC, cURus, KTL, and VDE approvals. The substitute carries cULus and VDE approvals. Both hold VDE certification. The substitute maintains active product status with current regulatory compliance.

Q: What is the significance of the melting I²t difference?

A: The C310T-2-R-BKS has melting I²t of 27.2 while the 0877002.MXEP has 24.6. Both values fall within the slow-blow ceramic fuse category and maintain the same 2 A current rating and 35 A breaking capacity. This parameter difference does not affect functional equivalence for standard circuit protection applications.

Q: How do the DC cold resistance values compare?

A: The C310T-2-R-BKS measures 30 mOhms while the 0877002.MXEP measures 0.035 Ohms (35 mOhms). Both values are within acceptable ranges for ceramic cartridge fuses and do not impact circuit protection performance.