Equivalent & Substitute Parts for C310T-2-R-TR2S

Part Overview

The C310T-2-R-TR2S is a 2 A, 250 V AC/DC ceramic cartridge fuse with slow-blow response characteristics, manufactured by Eaton - Electronics Division. This axial-mounted through-hole fuse is designed for circuit protection applications requiring a 2-ampere current rating at 250 volts. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system support and new designs.

Substiute Parts

C310T-2-R-TR2S

Eaton - Electronics DivisionIn Stock: 839C310T-2-R-TR2S Datasheet

Current PartRFQ

C310T-SC-2-5-R-TR2

Eaton - Electronics DivisionIn Stock: 749C310T-SC-2-5-R-TR2 Datasheet

DirectRFQ

C310T-SC-2-R-TR2

Eaton - Electronics DivisionIn Stock: 696C310T-SC-2-R-TR2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the C310T-2-R-TR2S are identified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Electrical Parameters:

• Current Rating: 2 A (exact match required for direct substitution)
• Voltage Rating: 250 V AC (exact match required)
• Response Time: Slow Blow (exact match required)
• Breaking Capacity: 35 A (exact match required)

Mechanical Parameters:

• Fuse Type: Cartridge, Ceramic (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Cartridge, Non-Standard (Axial) (exact match required)

Compliance Parameters:

• Approval Agencies: Must include CQC, cURus, and VDE certifications

The C310T-SC-2-R-TR2 qualifies as a direct substitute, sharing identical electrical specifications and maintaining the required certifications. This part is classified as active, ensuring ongoing availability and support.

Parameter Comparison

Engineering Selection Recommendations

The C310T-SC-2-R-TR2 is the primary equivalent substitute for the obsolete C310T-2-R-TR2S. Both parts share identical electrical ratings (2 A, 250 V AC, slow-blow response) and mechanical form factors (ceramic cartridge, through-hole axial mount). The substitute part maintains all required certifications including CQC, cURus, and VDE, with additional approvals (KC, TUV) and RoHS compliance.

The C310T-SC-2-R-TR2 is classified as active, ensuring long-term availability and supply chain continuity. The minor dimensional variation (0.142" Dia x 0.394" L versus 0.157" Dia x 0.453" L) and DC cold resistance difference (26.5 mOhms versus 30 mOhms) remain within acceptable tolerances for ceramic cartridge fuse applications and do not affect functional performance at rated specifications.

For applications requiring the exact 2-ampere rating, the C310T-SC-2-R-TR2 provides direct electrical and mechanical compatibility. The C310T-SC-2-5-R-TR2 (2.5 A rating) is not suitable as a direct substitute due to its higher current rating, which would alter circuit protection characteristics.

Frequently Asked Questions (FAQ)

Q: Can the C310T-SC-2-R-TR2 be used as a direct replacement for the C310T-2-R-TR2S?

A: Yes. Both parts share identical electrical specifications (2 A, 250 V AC, slow-blow response), fuse type (ceramic cartridge), mounting configuration (through-hole axial), and breaking capacity (35 A). The substitute part is active and maintains required certifications.

Q: What is the significance of the dimensional difference between the main part and substitute?

A: The main part measures 0.157" Dia x 0.453" L (4.00mm x 11.50mm), while the substitute measures 0.142" Dia x 0.394" L (3.60mm x 10.00mm). Both are classified as non-standard axial cartridges. The dimensional variation reflects design evolution within the C310T series. Compatibility depends on the specific fuse holder or socket design in the application. Physical fit must be verified against the mounting hardware.

Q: Why is the C310T-SC-2-5-R-TR2 not listed as a direct substitute?

A: The C310T-SC-2-5-R-TR2 has a current rating of 2.5 A, which differs from the required 2 A specification. Substituting a higher-rated fuse compromises circuit protection by allowing excessive current to flow before the fuse opens. Current rating must match exactly for proper circuit protection function.

Q: What certifications are maintained in the substitute part?

A: The C310T-SC-2-R-TR2 maintains CQC, cURus, and VDE certifications required by the original part, with additional approvals from KC and TUV. The substitute also carries RoHS compliance certification.

Q: Is the DC cold resistance difference between parts significant?

A: The main part has 30 mOhms DC cold resistance; the substitute has 26.5 mOhms. This 3.5 mOhm difference is negligible in ceramic cartridge fuse applications and does not affect circuit protection performance at rated specifications.

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

A: The C310T-SC-2-R-TR2 operates across -55°C to 125°C. This extended temperature range provides broader environmental compatibility compared to the main part, for which operating temperature was not specified.