CB61F5A-TR2 Equivalent & Substitute Parts

Part Overview

The CB61F5A-TR2 is a 5 A, 125 V AC/DC surface mount board mount fuse manufactured by Eaton - Electronics Division. This fast blow fuse is packaged in Tape & Reel (TR) format with a 2-SMD, Square End Block configuration. The part is Active status and widely used in circuit protection applications requiring fast response characteristics. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained, allowing for design flexibility, supply chain optimization, or packaging format changes.

Substiute Parts

CB61F5A-TR2

Eaton - Electronics DivisionIn Stock: 10332CB61F5A-TR2 Datasheet

Current PartRFQ

CB61F5A-TR1

Eaton - Electronics DivisionIn Stock: 1927CB61F5A-TR1 Datasheet

Parametric EquivalentRFQ

0476005.MR

Littelfuse Inc.In Stock: 25280476005.MR Datasheet

DirectRFQ

0476005.MRSN

Littelfuse Inc.In Stock: 10320476005.MRSN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CB61F5A-TR2 are classified based on strict electrical and mechanical parameter matching:

Parametric Equivalent (Same Manufacturer, Different Packaging): CB61F5A-TR1 maintains identical electrical specifications (5 A, 125 V AC/DC, Fast Blow) and mechanical form factor (2-SMD, Square End Block) as the main part. The only difference is packaging format: Cut Tape (CT) & Digi-Reel® versus Tape & Reel (TR). This substitution is valid when packaging format flexibility is acceptable.

Direct Manufacturer Equivalents (Different Manufacturer, Enhanced AC Voltage Rating): 0476005.MR and 0476005.MRSN (Littelfuse Inc., NANO²®476 series) share the same current rating (5 A), DC voltage rating (125 V), response time (Fast Blow), mounting type (Surface Mount), package configuration (2-SMD, Square End Block), and breaking capacity (100 A AC, 300 A DC). These parts feature an elevated AC voltage rating of 250 V compared to the main part's 125 V AC. Both are packaged in Tape & Reel (TR) format. The difference between 0476005.MR and 0476005.MRSN is packaging designation only; both are electrically and mechanically identical.

Key Parameters Determining Substitution:

• Current Rating: 5 A (all substitutes)
• DC Voltage Rating: 125 V (all substitutes)
• Response Time: Fast Blow (all substitutes)
• Mounting Type: Surface Mount (all substitutes)
• Package Configuration: 2-SMD, Square End Block (all substitutes)
• Breaking Capacity: 100 A AC, 300 A DC (all substitutes)

Parameter Comparison

Engineering Selection Recommendations

CB61F5A-TR1 Selection Criteria: CB61F5A-TR1 is a direct parametric equivalent suitable for applications where packaging format flexibility is acceptable. Both parts are manufactured by Eaton - Electronics Division within the CB61F series and maintain identical electrical and mechanical specifications. Selection of CB61F5A-TR1 is appropriate when Cut Tape (CT) & Digi-Reel® packaging accommodates production requirements. Both parts carry Active product status and equivalent compliance certifications (CQC, cULus, PSE).

0476005.MR and 0476005.MRSN Selection Criteria: The Littelfuse NANO²®476 series parts (0476005.MR and 0476005.MRSN) are suitable for applications where the elevated AC voltage rating of 250 V provides design margin beyond the 125 V AC requirement of the main part. These parts maintain all critical electrical parameters (5 A current, 125 V DC, Fast Blow response, 100 A AC / 300 A DC breaking capacity) and mechanical form factor (2-SMD, Square End Block, Surface Mount). The Littelfuse parts feature lower melting I²t (4 versus 7.7) and slightly higher DC cold resistance (0.0157 versus 0.013 Ohms), with marginally larger physical dimensions (0.106" versus 0.101" width and height). Both Littelfuse variants are Active status with cURus certification. Selection between 0476005.MR and 0476005.MRSN is based on packaging designation requirements only, as both are electrically and mechanically identical.

Frequently Asked Questions (FAQ)

Q: Can CB61F5A-TR1 be used as a direct replacement for CB61F5A-TR2?

A: Yes. CB61F5A-TR1 maintains identical electrical specifications (5 A, 125 V AC/DC, Fast Blow) and mechanical configuration (2-SMD, Square End Block, Surface Mount). The only difference is packaging format: Cut Tape (CT) & Digi-Reel® versus Tape & Reel (TR). Substitution is valid when packaging format is compatible with assembly processes.

Q: What are the differences between 0476005.MR and 0476005.MRSN?

A: 0476005.MR and 0476005.MRSN are electrically and mechanically identical. Both are Littelfuse NANO²®476 series fuses with 5 A current rating, 250 V AC / 125 V DC voltage ratings, and 2-SMD, Square End Block configuration. The part number suffix designates packaging or distribution channel designation only. Selection between these variants depends on procurement or packaging requirements.

Q: Can Littelfuse 0476005.MR or 0476005.MRSN replace the Eaton CB61F5A-TR2?

A: Littelfuse parts are suitable substitutes when the elevated AC voltage rating of 250 V is acceptable for the application. All critical electrical parameters match: 5 A current, 125 V DC rating, Fast Blow response, and 100 A AC / 300 A DC breaking capacity. Physical dimensions differ slightly (0.106" versus 0.101" width/height), and melting I²t values differ (4 versus 7.7). Mechanical fit and thermal characteristics must be verified for the specific application.

Q: What is the significance of the melting I²t difference between Eaton and Littelfuse parts?

A: Melting I²t is a thermal energy parameter indicating the fuse element's response to overcurrent conditions. Eaton CB61F5A-TR2 has melting I²t of 7.7, while Littelfuse 0476005.MR and 0476005.MRSN have melting I²t of 4. The lower Littelfuse value indicates faster thermal response to overcurrent. Application-specific thermal and protection requirements determine whether this difference is acceptable.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. CB61F5A-TR2, CB61F5A-TR1, 0476005.MR, and 0476005.MRSN are all ROHS3 Compliant. All parts carry Moisture Sensitivity Level 1 (Unlimited).

Q: What certifications apply to each part?

A: CB61F5A-TR2 and CB61F5A-TR1 carry CQC, cULus, and PSE certifications. Littelfuse parts 0476005.MR and 0476005.MRSN carry cURus certification. Application requirements determine which certification set is necessary.

Q: Can physical dimension differences affect PCB layout?

A: Yes. CB61F5A-TR2 dimensions are 0.240" L x 0.101" W x 0.101" H (6.10mm x 2.57mm x 2.57mm). Littelfuse parts are 0.240" L x 0.106" W x 0.106" H (6.10mm x 2.69mm x 2.69mm). The width and height are 0.005" (0.127mm) larger on Littelfuse parts. PCB footprint and component spacing must accommodate these dimensional differences.