Littelfuse 0251002.NAT6L Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0251002.NAT6L is a 2 A, 125 V AC/DC board mount axial fuse from the PICO® II 251 series. This component is designed for through-hole mounting applications requiring fast-blow protection in electronic circuits. The part maintains active product status with full regulatory compliance across multiple international standards. Substitute parts are identified based on identical electrical specifications and mechanical compatibility, differing only in packaging configuration.

Substiute Parts

0251002.NAT6L

Littelfuse Inc.In Stock: 7200251002.NAT6L Datasheet

Current PartRFQ

0251002.HAT1L

Littelfuse Inc.In Stock: 20820251002.HAT1L Datasheet

Parametric EquivalentRFQ

0251002.MAT1L

Littelfuse Inc.In Stock: 48050251002.MAT1L Datasheet

Parametric EquivalentRFQ

0251002.NAT1L

Littelfuse Inc.In Stock: 73630251002.NAT1L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0251002.NAT6L are qualified based on strict electrical and mechanical parameter matching within the PICO® II 251 series. All substitute parts maintain identical specifications across the following critical parameters:

• Current Rating: 2 A
• Voltage Rating: 125 V AC / 125 V DC
• Response Time: Fast Blow
• Mounting Type: Through Hole
• Package / Case: Axial
• Breaking Capacity: 50 A AC, 300 A DC
• Melting I²t: 0.405
• Operating Temperature: -55°C to 125°C
• DC Cold Resistance: 0.0473 Ohms
• Physical Dimensions: 0.110" Dia x 0.280" L (2.80 mm x 7.11 mm)
• Regulatory Compliance: CCC, CSA, cURus, PSE, TUV

The only variation among substitute parts is the packaging configuration. The main part (0251002.NAT6L) is supplied in Tape & Box (TB) packaging, while substitute parts are available in Cut Tape (CT) packaging. This packaging difference does not affect electrical performance, mechanical fit, or functional compatibility in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain full electrical and mechanical equivalence to the 0251002.NAT6L. Selection among these parts should be based on packaging requirements and supply availability:

• 0251002.NAT6L: Tape & Box packaging. Suitable for applications requiring boxed component delivery or mixed-quantity orders.
• 0251002.HAT1L: Cut Tape packaging with 1,982 units in stock. Appropriate for high-volume production runs requiring tape-reel format.
• 0251002.MAT1L: Cut Tape packaging with 4,748 units in stock. Recommended for standard production applications with extended lead-time assurance.
• 0251002.NAT1L: Cut Tape packaging with 7,322 units in stock. Optimal choice for maximum supply availability and just-in-time manufacturing environments.

All parts carry identical regulatory certifications (CCC, CSA, cURus, PSE, TUV) and maintain ROHS3 compliance. No functional or performance differences exist between these parts when used in equivalent circuit applications.

Frequently Asked Questions (FAQ)

Q: Can I substitute 0251002.NAT6L with 0251002.HAT1L, 0251002.MAT1L, or 0251002.NAT1L in my circuit design?

A: Yes. All substitute parts are electrically and mechanically equivalent. They share identical current ratings (2 A), voltage ratings (125 V AC/DC), response characteristics (Fast Blow), physical dimensions (0.110" Dia x 0.280" L), and regulatory approvals. The only difference is packaging format (Tape & Box versus Cut Tape).

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

A: Tape & Box packaging supplies components in a reel format with a protective box. Cut Tape packaging supplies components in tape format without the box. Both formats contain the same component and are suitable for automated pick-and-place assembly. The choice depends on your procurement and assembly process requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed (0251002.NAT6L, 0251002.HAT1L, 0251002.MAT1L, and 0251002.NAT1L) are ROHS3 compliant and carry identical regulatory certifications from CCC, CSA, cURus, PSE, and TUV.

Q: Do the substitute parts have the same breaking capacity and melting I²t characteristics?

A: Yes. All substitute parts maintain identical breaking capacity (50 A AC, 300 A DC) and melting I²t value (0.405), ensuring equivalent protection performance in circuit applications.

Q: Which substitute part should I select for maximum supply availability?

A: 0251002.NAT1L offers the highest inventory level (7,322 units in stock), followed by 0251002.MAT1L (4,748 units) and 0251002.HAT1L (1,982 units). Selection should align with your production volume and lead-time requirements.

Q: Are the physical dimensions identical across all substitute parts?

A: Yes. All parts maintain identical dimensions of 0.110" Dia x 0.280" L (2.80 mm x 7.11 mm), ensuring direct mechanical compatibility in through-hole PCB applications without design modification.