C310T-4-R-TR2 Equivalent & Substitute Parts

Part Overview

The C310T-4-R-TR2 is a ceramic cartridge fuse rated for 4 A at 250 V AC/DC with slow-blow response characteristics. This component is classified as obsolete, which necessitates identification of active equivalent parts for continued system design and maintenance applications. The fuse features a non-standard axial cartridge package with through-hole mounting and is approved by multiple international certification agencies including CQC, cURus, KTL, and TUV.

Substiute Parts

C310T-4-R-TR2

Eaton - Electronics DivisionIn Stock: 980C310T-4-R-TR2 Datasheet

Current PartRFQ

C310T-SC-4-R-TR2

Eaton - Electronics DivisionIn Stock: 979C310T-SC-4-R-TR2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the C310T-4-R-TR2 is based on strict equivalence of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Current Rating: 4 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Response Time: Slow Blow (exact match required)
• Fuse Type: Ceramic Cartridge (exact match required)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity: 40 A @ Rated Voltage (exact match required)

The substitute part C310T-SC-4-R-TR2 satisfies all critical electrical parameters. Physical dimensions differ between the main part (0.157" Dia × 0.453" L) and the substitute (0.142" Dia × 0.394" L), which may require mechanical accommodation verification in specific mounting applications. The substitute part maintains active product status and includes expanded certification coverage (KC and VDE added) with defined operating temperature range (-55°C ~ 125°C) and RoHS compliance.

Parameter Comparison

Engineering Selection Recommendations

The C310T-SC-4-R-TR2 is the direct active equivalent for the obsolete C310T-4-R-TR2. Selection of this substitute is based on:

Electrical Equivalence: All critical electrical parameters match exactly, including current rating, voltage rating, response time, and breaking capacity. DC cold resistance values are within 0.15 mOhms, indicating equivalent electrical performance.

Certification Coverage: The substitute part extends certification scope with addition of KC and VDE approvals while maintaining all original certifications (CQC, cURus, TUV). This expanded approval profile supports broader market applications.

Product Status: The substitute transitions from obsolete to active status, ensuring long-term availability and supply chain continuity.

Compliance: RoHS compliance of the substitute part aligns with current environmental regulations.

Physical Accommodation: The substitute part features reduced dimensions (approximately 10% smaller in diameter and 13% shorter in length). Mechanical verification is required to confirm compatibility with existing mounting fixtures and circuit board layouts.

Frequently Asked Questions (FAQ)

Q: Can C310T-SC-4-R-TR2 be used as a direct replacement for C310T-4-R-TR2?

A: Yes, from an electrical standpoint. All electrical parameters are equivalent: 4 A current rating, 250 V AC voltage rating, slow-blow response, 40 A breaking capacity, and ceramic cartridge construction. Physical dimensions differ, requiring mechanical verification for mounting compatibility.

Q: What are the key differences between these two parts?

A: The primary differences are product status (obsolete vs. active), physical dimensions (C310T-SC-4-R-TR2 is smaller), operating temperature specification (-55°C ~ 125°C for substitute), expanded certifications (KC and VDE added), and RoHS compliance status. Electrical performance parameters are equivalent.

Q: Are there any compatibility concerns with the smaller dimensions of C310T-SC-4-R-TR2?

A: The substitute part is approximately 10% smaller in diameter and 13% shorter in length. Compatibility depends on specific mounting fixture design and circuit board layout. Physical verification is necessary before implementation in existing designs.

Q: What certifications does each part hold?

A: C310T-4-R-TR2 holds CQC, cURus, KTL, and TUV certifications. C310T-SC-4-R-TR2 holds CQC, cURus, KC, TUV, and VDE certifications. The substitute provides broader international certification coverage.

Q: Is the substitute part RoHS compliant?

A: Yes, C310T-SC-4-R-TR2 is RoHS compliant. RoHS status is not specified for the main part C310T-4-R-TR2.

Q: Are there additional cross-reference alternatives listed for the substitute?

A: Yes, C310T-SC-4-R-TR2 has documented cross-references: C310T-SC-4-R-TR1 and 0877004.MRET1P. These parts share equivalent electrical specifications within the C310T-SC series.