Littelfuse 0251007.NAT1JL Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0251007.NAT1JL is a 7 A, 125 V AC/DC board mount fuse in the PICO® II 251 series, designed for through-hole axial mounting applications. This fast-blow fuse is actively produced and widely used in industrial and consumer electronics requiring overcurrent protection. Equivalent and substitute parts within this series maintain identical electrical and mechanical specifications, differing only in packaging configuration, which may be necessary for supply chain optimization, inventory management, or specific procurement requirements.

Substiute Parts

0251007.NAT1JL

Littelfuse Inc.In Stock: 10180251007.NAT1JL Datasheet

Current PartRFQ

0251007.HAT1L

Littelfuse Inc.In Stock: 11010251007.HAT1L Datasheet

Parametric EquivalentRFQ

0251007.MAT1L

Littelfuse Inc.In Stock: 27040251007.MAT1L Datasheet

Parametric EquivalentRFQ

0251007.PAT1L

Littelfuse Inc.In Stock: 11370251007.PAT1L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0251007.NAT1JL are determined by strict equivalence across all critical electrical and mechanical parameters: current rating (7 A), voltage ratings (125 V AC/DC), response time (Fast Blow), mounting type (Through Hole), package case (Axial), physical dimensions (0.110" Dia x 0.280" L), melting I²t (10.4), DC cold resistance (0.0107 Ohms), operating temperature range (-55°C ~ 125°C), and regulatory approvals (CSA, cURus, TUV). The substitute parts 0251007.HAT1L, 0251007.MAT1L, and 0251007.PAT1L are parametric equivalents that differ only in packaging configuration (Cut Tape or Tape & Box), which does not affect electrical performance or mechanical compatibility in board-level applications.

Parameter Comparison

Engineering Selection Recommendations

All four part numbers—0251007.NAT1JL, 0251007.HAT1L, 0251007.MAT1L, and 0251007.PAT1L—are active products from Littelfuse Inc. with identical electrical and mechanical specifications. Selection between these parts is determined by packaging requirements and inventory availability. For automated assembly processes requiring cut tape format, 0251007.MAT1L (2612 Pcs available) or 0251007.HAT1L (1012 Pcs available) are appropriate. For manual assembly or applications requiring tape and box packaging, 0251007.PAT1L (1068 Pcs available) or the primary part 0251007.NAT1JL (971 Pcs available) are suitable. All parts maintain CSA, cURus, and TUV certifications, ROHS3 compliance, and REACH unaffected status, ensuring regulatory compatibility across all substitution scenarios.

Frequently Asked Questions (FAQ)

Q: Can 0251007.HAT1L, 0251007.MAT1L, and 0251007.PAT1L be used interchangeably with 0251007.NAT1JL in the same circuit?

A: Yes. All four parts are parametric equivalents with identical electrical ratings (7 A, 125 V AC/DC), response characteristics (Fast Blow), and physical dimensions (0.110" Dia x 0.280" L). Substitution is valid from an electrical and mechanical standpoint. Differences exist only in packaging format (Cut Tape versus Tape & Box).

Q: What is the difference between Cut Tape (CT) and Tape & Box (TB) packaging?

A: Cut Tape packaging supplies components on continuous tape without a box, typically used for high-volume automated assembly. Tape & Box packaging includes the same tape format but adds a protective box for storage and handling. Both formats contain identical components; packaging choice depends on assembly process requirements and storage conditions.

Q: Are all substitute parts certified by the same regulatory agencies?

A: Yes. All four part numbers carry identical certifications: CSA, cURus, and TUV. All are ROHS3 compliant and REACH unaffected, ensuring equivalent regulatory status across all substitution options.

Q: Does packaging format affect the electrical performance of the fuse?

A: No. Packaging format (Cut Tape or Tape & Box) does not affect electrical performance, breaking capacity, melting I²t, or DC cold resistance. Once the component is removed from its packaging and installed on the board, electrical behavior is identical across all four part numbers.

Q: Which substitute part should be selected for maximum inventory availability?

A: 0251007.MAT1L offers the highest inventory level at 2612 pieces, followed by 0251007.HAT1L at 1012 pieces. Both are available in Cut Tape format. If Tape & Box format is required, 0251007.PAT1L provides 1068 pieces.