Littelfuse 41914000000 Equivalent & Substitute Parts

Part Overview

The Littelfuse 41914000000 is a 4 A, 125 V AC/DC board mount fuse with fast blow response time, designed for surface mount applications in the 2410 (6125 Metric) package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 419 series fuse provides protection in low-voltage DC and AC circuits with a 50 A breaking capacity at rated voltage.

Substiute Parts

41914000000

Littelfuse Inc.In Stock: 94841914000000 Datasheet

Current PartRFQ

0451004.MRL

Littelfuse Inc.In Stock: 421690451004.MRL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 41914000000 is determined by the following critical electrical and mechanical parameters:

• Current Rating: 4 A (exact match required)
• Voltage Rating: 125 V AC and 125 V DC (exact match required)
• Response Time: Fast Blow (exact match required)
• Breaking Capacity: 50 A at rated voltage (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Fuse Type: Board Mount, Cartridge Style Excluded (exact match required)
• Physical Dimensions: 0.240" L x 0.106" W x 0.106" H / 6.10mm x 2.69mm x 2.69mm (exact match required)

The primary substitute part 0451004.MRL meets all electrical and mechanical requirements while offering improved product status (Active) and enhanced compliance certifications. This part belongs to the NANO²® 451 series and maintains identical current, voltage, and breaking capacity specifications.

Parameter Comparison

Engineering Selection Recommendations

The 0451004.MRL is the direct substitute for the obsolete 41914000000. Both parts maintain identical electrical ratings (4 A, 125 V AC/DC, 50 A breaking capacity) and physical dimensions, ensuring direct compatibility in existing circuit designs.

The substitute part offers significant advantages in terms of product lifecycle and compliance:

• Active product status ensures long-term availability and supply chain continuity
• ROHS3 compliance meets current environmental regulations, whereas the main part is RoHS non-compliant
• Extended approval certifications (CSA, PSE, UL) provide broader regulatory acceptance compared to cULus certification alone
• Packaging availability in Cut Tape (CT) and Digi-Reel® formats supports both prototype and production volume requirements

The operating temperature range of the substitute (-55°C ~ 125°C) is narrower at the lower end compared to the main part (-65°C ~ 125°C). This difference is acceptable for most commercial and industrial applications operating within standard temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can the 0451004.MRL be used as a direct replacement for the 41914000000?

A: Yes. Both parts share identical current ratings (4 A), voltage ratings (125 V AC/DC), response time (Fast Blow), breaking capacity (50 A), and physical dimensions (6.10mm x 2.69mm x 2.69mm). The substitute is electrically and mechanically compatible.

Q: What is the difference in package designation between 2410 and 2-SMD, Square End Block?

A: Both designations refer to the same physical form factor and dimensions. The 2410 (6125 Metric) is the metric-based package designation, while 2-SMD, Square End Block describes the surface mount configuration. The parts are physically identical.

Q: Why is the melting I²t value different between the two parts?

A: The melting I²t values (3.42 vs. 3.152) represent slight variations in thermal characteristics within the same 4 A fast blow fuse classification. Both values fall within acceptable parameters for the 4 A current rating and do not affect substitution compatibility.

Q: Is the narrower operating temperature range of the substitute a concern?

A: The substitute operates from -55°C to 125°C, compared to the main part's -65°C to 125°C. For applications requiring operation below -55°C, the main part specifications must be verified. For standard commercial and industrial environments, the substitute's temperature range is sufficient.

Q: What packaging options are available for the substitute part?

A: The 0451004.MRL is available in Cut Tape (CT) and Digi-Reel® packaging formats, supporting both prototype development and high-volume production requirements.