Littelfuse 0251007.MXJL Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0251007.MXJL is a 7 A, 125 V AC/DC board mount fuse with axial through-hole packaging, designed for fast-blow response applications. This component is classified as Active product status and carries multiple international approvals (CSA, cURus, TUV). Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, ensuring functional interchangeability in circuit protection applications.

Substiute Parts

0251007.MXJL

LittelfuseIn Stock: 10790251007.MXJL Datasheet

Current PartRFQ

0251007.MXL

Littelfuse Inc.In Stock: 24460251007.MXL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0251007.MXJL is determined by strict equivalence across the following critical parameters:

• Current Rating: 7 A (exact match required)
• Voltage Rating: 125 V AC and 125 V DC (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Axial (exact match required)
• Physical Dimensions: 0.110" Dia x 0.280" L (exact match required)
• Melting I²t: 10.4 (exact match required)
• DC Cold Resistance: 0.0107 Ohms (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Regulatory Compliance: CSA, cURus, TUV approvals (exact match required)

The substitute part 0251007.MXL meets all these criteria and is classified as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the 0251007.MXJL and 0251007.MXL are Active product status components within the Littelfuse PICO® II 251 series. Selection between these parts is based on availability and inventory considerations rather than functional differences. Both parts carry identical regulatory certifications (CSA, cURus, TUV) and RoHS3 compliance status. The 0251007.MXL offers higher DC breaking capacity (300A DC versus unspecified for the main part), which does not affect substitution eligibility but may provide additional margin in DC applications. Both components are suitable for direct substitution in circuit protection applications requiring 7 A fast-blow fuse protection at 125 V AC/DC.

Frequently Asked Questions (FAQ)

Q: Can 0251007.MXL be used as a direct replacement for 0251007.MXJL?

A: Yes. Both parts are parametric equivalents with identical current rating (7 A), voltage ratings (125 V AC/DC), response time (Fast Blow), mounting type (Through Hole), package type (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).

Q: What are the key parameters that determine substitution eligibility?

A: Substitution requires exact equivalence in current rating, AC/DC voltage ratings, response time classification, mounting type, package configuration, physical dimensions, melting I²t value, DC cold resistance, operating temperature range, and regulatory certifications. Deviation in any of these parameters disqualifies a part from substitution.

Q: Are there any differences in breaking capacity between these parts?

A: The 0251007.MXL specifies 50A AC and 300A DC breaking capacity, while the 0251007.MXJL specifies 50A breaking capacity at rated voltage. This difference does not affect substitution eligibility, as both parts meet the same electrical protection requirements for the specified 7 A current rating.

Q: Do both parts have the same regulatory approvals?

A: Yes. Both 0251007.MXJL and 0251007.MXL carry CSA, cURus, and TUV approvals and are ROHS3 compliant, with REACH Unaffected status.

Q: What is the physical footprint compatibility?

A: Both parts share identical axial through-hole dimensions of 0.110" diameter by 0.280" length (2.80mm x 7.11mm), ensuring PCB layout compatibility without modification.