Littelfuse 025104.6NRT2 Equivalent & Substitute Parts

Part Overview

The Littelfuse 025104.6NRT2 is a 4.6 A, 125 V AC/DC board mount axial fuse from the PICO® II 251 series. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part features fast-blow response characteristics, through-hole mounting, and compliance with CSA, cURus, PSE, and TUV approval agencies. Substitute parts maintain identical electrical and mechanical specifications while offering active product status and improved compliance profiles.

Substiute Parts

025103.5NRT2

Littelfuse Inc.In Stock: 828025103.5NRT2 Datasheet

Current PartRFQ

025103.5MXL

Littelfuse Inc.In Stock: 1171025103.5MXL Datasheet

MFR RecommendedRFQ

025103.5HAT1L

Littelfuse Inc.In Stock: 1112025103.5HAT1L Datasheet

Parametric EquivalentRFQ

025103.5MAT1L

Littelfuse Inc.In Stock: 955025103.5MAT1L Datasheet

Parametric EquivalentRFQ

025103.5MRT1L

Littelfuse Inc.In Stock: 2050025103.5MRT1L Datasheet

Parametric EquivalentRFQ

025103.5NRT1L

Littelfuse Inc.In Stock: 3184025103.5NRT1L Datasheet

Parametric EquivalentRFQ

025103.5PARL

Littelfuse Inc.In Stock: 975025103.5PARL Datasheet

Parametric EquivalentRFQ

025103.5PF001L

LittelfuseIn Stock: 992025103.5PF001L Datasheet

Parametric EquivalentRFQ

025103.5PF003L

Littelfuse Inc.In Stock: 995025103.5PF003L Datasheet

Parametric EquivalentRFQ

7010.7180.13

SCHURTER Inc.In Stock: 12107010.7180.13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: current rating (4.6 A), voltage ratings (125 V AC/DC), response time (fast blow), mounting type (through hole), fuse type (board mount, cartridge style excluded), package case (axial), breaking capacity, melting I²t, operating temperature range, physical dimensions, and approval agency certifications.

Littelfuse parts 025104.6MXL, 025104.6HAT1L, 025104.6MAT1L, 025104.6MRT1L, 025104.6NRT1L, 025104.6PARL, 025104.6PF001L, and 025104.6PF003L meet all electrical and mechanical parameters and are classified as parametric equivalents or manufacturer-recommended substitutes. The SCHURTER part 7010.7180.13 is a direct cross-reference alternative from a different manufacturer, maintaining identical electrical specifications with minor dimensional and melting I²t variations.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement of the obsolete 025104.6NRT2, select 025104.6MXL as the primary substitute. This part maintains identical electrical and mechanical specifications, offers active product status, and achieves ROHS3 compliance. Both parts are supplied in bulk packaging and are functionally interchangeable.

For high-volume production requiring tape and reel packaging, 025104.6PARL, 025104.6PF001L, or 025104.6PF003L are suitable alternatives. These parts maintain all electrical parameters and offer ROHS3 compliance with active product status.

For cut tape packaging requirements, 025104.6HAT1L, 025104.6MAT1L, 025104.6MRT1L, or 025104.6NRT1L provide equivalent performance with ROHS3 compliance and active product status.

The SCHURTER part 7010.7180.13 is a cross-manufacturer alternative with identical current and voltage ratings. This part exhibits a higher melting I²t value (2.6 versus 1.58) and a reduced upper operating temperature limit (-55°C to 85°C versus -55°C to 125°C). Selection of this part requires confirmation that the application thermal environment does not exceed 85°C and that the higher melting I²t does not conflict with circuit protection requirements.

Frequently Asked Questions (FAQ)

Q: Can 025104.6MXL directly replace 025104.6NRT2 without circuit modification?

A: Yes. Both parts share identical current rating (4.6 A), voltage ratings (125 V AC/DC), response time (fast blow), breaking capacity (50A AC, 300A DC), melting I²t (1.58), operating temperature range (-55°C to 125°C), and physical dimensions (0.110" Dia x 0.280" L). No circuit modification is required.

Q: What is the difference between the Littelfuse substitute parts?

A: All Littelfuse substitutes (025104.6MXL, 025104.6HAT1L, 025104.6MAT1L, 025104.6MRT1L, 025104.6NRT1L, 025104.6PARL, 025104.6PF001L, 025104.6PF003L) are electrically and mechanically identical. The differences are packaging format: bulk (MXL), cut tape (HAT1L, MAT1L, MRT1L, NRT1L), or tape and reel (PARL, PF001L, PF003L). Selection depends on procurement and assembly requirements.

Q: Is the SCHURTER 7010.7180.13 a suitable replacement?

A: The SCHURTER part maintains identical current and voltage ratings and fast-blow response. However, it has a higher melting I²t (2.6 versus 1.58) and a lower maximum operating temperature (85°C versus 125°C). Use this part only if the application operates below 85°C and the higher melting I²t does not compromise circuit protection strategy.

Q: What compliance certifications apply to all substitute parts?

A: All Littelfuse substitutes maintain CSA, cURus, PSE, and TUV approvals. The SCHURTER part holds CSA and UR approvals. Verify that the selected part's certification profile meets application regulatory requirements.

Q: Why is the original 025104.6NRT2 marked as obsolete?

A: The part is obsolete due to product lifecycle management. Littelfuse has transitioned to active alternatives with improved compliance profiles (ROHS3 compliance) and broader packaging options. The substitute parts provide equivalent functionality with enhanced regulatory alignment.