Littelfuse 047101.5NRT1 Equivalent & Substitute Parts

Part Overview

The Littelfuse 047101.5NRT1 is a 1.5 A, 125 V AC/DC board mount axial fuse from the PICO® II 471 series. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The electrical and mechanical specifications remain consistent across the substitute options, with variations in packaging format, series designation, and compliance status.

Substiute Parts

047101.5NRT1

Littelfuse Inc.In Stock: 904047101.5NRT1 Datasheet

Current PartRFQ

047101.5NRT1L

Littelfuse Inc.In Stock: 1178047101.5NRT1L Datasheet

DirectRFQ

047101.5MAT1L

Littelfuse Inc.In Stock: 2094047101.5MAT1L Datasheet

Parametric EquivalentRFQ

047201.5MRT1L

Littelfuse Inc.In Stock: 1029047201.5MRT1L Datasheet

Parametric EquivalentRFQ

047201.5NRT1L

Littelfuse Inc.In Stock: 1004047201.5NRT1L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 047101.5NRT1 is determined by electrical equivalence across the following parameters: current rating (1.5 A), AC and DC voltage ratings (125 V each), response time (Slow Blow), mounting type (Through Hole), package style (Axial), physical dimensions (0.110" Dia x 0.280" L), breaking capacity (50 A), and operating temperature range (-55°C ~ 125°C).

The substitute parts are grouped into two categories:

Direct Manufacturer Equivalent (Packaging Variant): 047101.5NRT1L maintains identical electrical specifications and series designation (PICO® II 471) with a change in packaging format from bulk to Tape & Reel (TR). This part is active and RoHS3 compliant.

Parametric Equivalents (Series Variant): 047101.5MAT1L, 047201.5MRT1L, and 047201.5NRT1L share all critical electrical parameters but differ in series designation (PICO® II 472 for the 0472xx parts) and internal resistance characteristics. These parts are active and RoHS3 compliant.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement with active product status: 047101.5NRT1L is the primary substitute, maintaining identical electrical specifications, series designation, and approval agencies (CSA, PSE, UR) while offering active product status and RoHS3 compliance. The only difference is packaging format (Tape & Reel vs. bulk).

For parametric equivalence with active product status: 047101.5MAT1L provides identical electrical specifications and series designation with Cut Tape packaging. This part is active and RoHS3 compliant.

For series variant substitution: 047201.5MRT1L and 047201.5NRT1L are parametric equivalents from the PICO® II 472 series. These parts maintain all critical electrical parameters (1.5 A, 125 V AC/DC, Slow Blow, 50 A breaking capacity) but differ in internal resistance (0.039 Ohms vs. 0.054 Ohms) and melting I²t (2.4081 vs. 1.61). Approval is limited to UR. These parts are active and RoHS3 compliant.

Selection should prioritize parts with active product status and RoHS3 compliance. Approval agency coverage (CSA, PSE, UR vs. UR only) and internal resistance characteristics should be evaluated against specific application requirements.

Frequently Asked Questions (FAQ)

Q: Can 047101.5NRT1L be used as a direct replacement for 047101.5NRT1?

A: Yes. The 047101.5NRT1L is electrically and mechanically identical to the 047101.5NRT1, with the primary difference being packaging format (Tape & Reel vs. bulk). Both maintain the same current rating (1.5 A), voltage ratings (125 V AC/DC), response time (Slow Blow), physical dimensions, and approval agencies.

Q: What is the difference between 047101.5NRT1L and 047201.5NRT1L?

A: Both parts share identical electrical specifications (1.5 A, 125 V AC/DC, Slow Blow, 50 A breaking capacity). The primary differences are series designation (PICO® II 471 vs. PICO® II 472), internal DC cold resistance (0.054 Ohms vs. 0.039 Ohms), melting I²t (1.61 vs. 2.4081), and approval agencies (CSA, PSE, UR vs. UR only).

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts (047101.5NRT1L, 047101.5MAT1L, 047201.5MRT1L, and 047201.5NRT1L) are RoHS3 compliant. The original 047101.5NRT1 is RoHS non-compliant.

Q: What packaging formats are available for these fuses?

A: The substitute parts are available in three packaging formats: Tape & Reel (TR) for 047101.5NRT1L, 047201.5MRT1L, and 047201.5NRT1L; Cut Tape (CT) for 047101.5MAT1L; and bulk for the original 047101.5NRT1.

Q: Do all substitute parts have the same approval agencies?

A: No. The 047101.5NRT1L and 047101.5MAT1L maintain the original approval agencies (CSA, PSE, UR). The 047201.5MRT1L and 047201.5NRT1L are approved by UR only. Application requirements should determine which approval coverage is necessary.

Q: Can 047201.5NRT1L be used in place of 047101.5NRT1L?

A: Electrically, yes, as both maintain the same current rating, voltage ratings, and response time. However, the 047201.5NRT1L has different internal resistance and melting I²t characteristics, and approval is limited to UR. Application-specific thermal and electrical requirements should be evaluated before substitution.