Littelfuse 0255.062M Equivalent & Substitute Parts

Part Overview

The Littelfuse 0255.062M is a 62 mA, 125 V AC/DC board mount axial fuse from the PICO® 255 series. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations. The PICO® 255 series has been superseded by newer product lines with enhanced performance characteristics and improved compliance standards.

Substiute Parts

0255.062M

Littelfuse Inc.In Stock: 7980255.062M Datasheet

Current PartRFQ

0251.062MXL

Littelfuse Inc.In Stock: 2003840251.062MXL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0255.062M is determined by strict equivalence across the following parameters:

• Current Rating: 62 mA (exact match required)
• Voltage Rating: 125 V AC and 125 V DC (exact match required)
• Fuse Type: Board Mount, Axial configuration (exact match required)
• Mounting Type: Through Hole (exact match required)
• Response Time: Fast Blow (exact match required)
• Breaking Capacity: 50 A AC, 300 A DC (exact match required)

The substitute part 0251.062MXL meets all these core electrical and mechanical parameters, enabling direct functional replacement in applications currently using the 0255.062M.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 0251.062MXL is the manufacturer-recommended substitute for the obsolete 0255.062M. Both components share identical electrical specifications across current rating, voltage ratings, breaking capacity, and response characteristics, ensuring functional equivalence in circuit protection applications.

The 0251.062MXL offers the following advantages:

• Active product status with established supply chain availability
• ROHS3 compliance, meeting current environmental and regulatory requirements
• Enhanced approval certifications (cURus in addition to CSA)
• Defined operating temperature range (-55°C ~ 125°C)
• Established melting I²t characteristic (0.000113) and DC cold resistance (7 Ohms)

Physical dimensions differ slightly: the substitute part has a marginally larger diameter (0.110" vs 0.095") while maintaining the same length (0.280"). PCB layout verification is necessary to confirm accommodation of the increased diameter in existing through-hole mounting positions.

Frequently Asked Questions (FAQ)

Q: Can the 0251.062MXL be used as a direct replacement for the 0255.062M?

A: Yes, the 0251.062MXL is the manufacturer-recommended substitute. Both parts share identical electrical ratings (62 mA, 125 V AC/DC), response time (Fast Blow), breaking capacity (50 A AC, 300 A DC), and mounting configuration (Through Hole Axial). Physical dimensions require PCB layout verification due to a 0.015" increase in diameter.

Q: What is the primary reason for substitution?

A: The 0255.062M is classified as obsolete. The 0251.062MXL from the PICO® II 251 series is the active replacement, ensuring long-term supply availability and compliance with current regulatory standards.

Q: Are there compliance differences between these parts?

A: The 0255.062M is RoHS non-compliant, while the 0251.062MXL is ROHS3 compliant. The substitute also carries cURus certification in addition to CSA approval. These differences favor the 0251.062MXL for new designs and systems requiring environmental compliance.

Q: Will the 0251.062MXL fit in existing PCB layouts designed for the 0255.062M?

A: The axial length remains identical (0.280"), but the diameter increases from 0.095" to 0.110". PCB hole sizing and component spacing must be verified to confirm physical compatibility.

Q: What are the key electrical parameters that define substitution?

A: Substitution is determined by exact equivalence in current rating (62 mA), voltage ratings (125 V AC and DC), fuse type (Board Mount Axial), response time (Fast Blow), and breaking capacity (50 A AC, 300 A DC).