TR2/C517-3-R Equivalent & Substitute Parts

Part Overview

The TR2/C517-3-R is a 3 A, 350 V AC/DC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for through-hole mounting in the 2AG form factor (5mm x 15mm axial package). The part is currently active in production with 1,070 units in stock. Glass cartridge fuses of this specification are essential protective components in electrical circuits requiring fast response to overcurrent conditions. Substitute parts may be required due to inventory constraints, supply chain considerations, or design flexibility in applications where equivalent electrical and mechanical parameters are acceptable.

Substiute Parts

TR2/C517-3-R

Eaton - Electronics DivisionIn Stock: 1161TR2/C517-3-R Datasheet

Current PartRFQ

0208003.DRT1P

Littelfuse Inc.In Stock: 8590208003.DRT1P Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TR2/C517-3-R are identified based on strict equivalence across the following critical parameters:

Electrical Parameters (Non-negotiable):

• Current Rating: 3 A (exact match required)
• Voltage Rating: 350 V AC (minimum requirement)
• Response Time: Fast Blow (protection characteristic match)
• Breaking Capacity: 100 A @ Rated Voltage (fault handling capability)

Mechanical Parameters (Form Factor):

• Package / Case: 2AG, 5mm x 15mm (Axial) (physical dimensions and holder compatibility)
• Fuse Type: Cartridge, Glass (material and construction type)

Regulatory & Compliance Parameters:

• RoHS Status: RoHS Compliant or equivalent environmental standard
• Approval Agencies: UL, CE, cURus, or PSE certifications acceptable

The substitute part 0208003.DRT1P from Littelfuse Inc. meets all electrical and mechanical equivalence criteria. Differences in mounting type (Requires Holder vs. Through Hole), DC cold resistance, melting I²t values, and operating temperature ranges do not disqualify substitution when the primary electrical protection function and form factor remain equivalent.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: TR2/C517-3-R (Eaton - Electronics Division)

The TR2/C517-3-R is the specified component with active production status and UL approval. This part is recommended for new designs and applications where the through-hole mounting configuration is integrated into the circuit board design. Current inventory of 1,070 units supports immediate availability.

Substitute Selection: 0208003.DRT1P (Littelfuse Inc.)

The 0208003.DRT1P is a direct electrical equivalent with identical current rating, voltage rating, response time, and breaking capacity. This substitute is suitable for applications where:

• Inventory of the primary part is unavailable
• Design flexibility permits holder-based mounting instead of through-hole integration
• Compliance with CE, cURus, or PSE certifications is required in addition to or instead of UL certification
• Operating temperature range of -55°C to 125°C is specified in the application

The Littelfuse part carries ROHS3 compliance and REACH unaffected status, meeting current environmental standards. Inventory of 798 units is available.

Critical Design Consideration:

The primary difference between these parts is the mounting type. The Eaton part is designed for direct through-hole mounting on a circuit board, while the Littelfuse part requires a separate fuse holder. Circuit board layout and mechanical integration must accommodate this difference. Both parts maintain identical electrical protection characteristics and form factor dimensions within acceptable engineering tolerances.

Frequently Asked Questions (FAQ)

Q: Can the 0208003.DRT1P directly replace the TR2/C517-3-R without circuit board modification?

A: No. The TR2/C517-3-R is designed for through-hole mounting directly into the circuit board, while the 0208003.DRT1P requires a separate fuse holder. Circuit board redesign or addition of a compatible holder is necessary for substitution.

Q: Are the electrical protection characteristics identical between these two parts?

A: Yes. Both parts have identical current rating (3 A), voltage rating (350 V AC), response time (fast blow), and breaking capacity (100 A). The electrical protection function is equivalent.

Q: What is the significance of the different melting I²t values (5.87 vs. 4.62)?

A: The melting I²t value indicates the thermal energy required to melt the fuse element. The Littelfuse part (4.62) will respond slightly faster to thermal stress than the Eaton part (5.87). Both values are within the fast-blow category and maintain the 3 A current rating. Application-specific thermal analysis may be required if precise response time is critical.

Q: Does the size difference (5.50mm vs. 4.70mm diameter) affect compatibility?

A: Both parts conform to the 2AG form factor specification. The minor diameter variance (0.8mm) is within standard mechanical tolerances for this package type. Holder compatibility depends on the specific holder design; verification with the holder manufacturer is recommended.

Q: Which certifications should I prioritize for my application?

A: The Eaton part carries UL certification. The Littelfuse part carries CE, cURus, and PSE certifications. Select based on your target market and regulatory requirements. UL is standard for North American applications; CE for European markets; cURus for Canadian/US dual certification; PSE for Japanese markets.

Q: Is the operating temperature range of the Littelfuse part a limiting factor?

A: The Littelfuse part specifies -55°C to 125°C operating temperature. The Eaton part does not specify an operating temperature range in the provided data. If your application requires operation outside the Littelfuse range, the Eaton part may be preferred, or operating temperature specifications for the Eaton part should be obtained from the manufacturer.

Q: Are both parts RoHS compliant?

A: Yes. The Eaton part is RoHS Compliant. The Littelfuse part is ROHS3 Compliant, which is the current revision of the RoHS directive. Both meet environmental compliance requirements.