Littelfuse 0275030.M Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0275030.M is a 30A, 32V AC/DC board mount axial fuse from the PICO® 275 series, designed for through-hole PCB applications. This part is classified as obsolete, making identification of active equivalent components essential for ongoing production, maintenance, and new design implementations. The substitute part maintains identical electrical and mechanical specifications while offering improved availability and compliance status.

Substiute Parts

0275030.M

Littelfuse Inc.In Stock: 10740275030.M Datasheet

Current PartRFQ

0275030.MXL

Littelfuse Inc.In Stock: 26890275030.MXL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0275030.M with the 0275030.MXL is based on strict electrical and mechanical parameter equivalence. Both parts share identical specifications across all critical selection criteria:

• Current Rating: 30 A (exact match)
• Voltage Rating: 32 V AC / 32 V DC (exact match)
• Response Time: Fast Blow (exact match)
• Breaking Capacity: 100 A AC / 300 A DC (exact match)
• Melting I²t: 288 (exact match)
• Physical Dimensions: 0.133" Dia x 0.310" L (exact match)
• DC Cold Resistance: 0.002 Ohms (exact match)
• Operating Temperature: -55°C ~ 125°C (exact match)
• Mounting Type: Through Hole Axial (exact match)
• Approval Agency: UL (exact match)

The primary distinction is product status and packaging configuration, not functional performance.

Parameter Comparison

Engineering Selection Recommendations

The 0275030.MXL is the direct active equivalent for the obsolete 0275030.M. Selection of the substitute part is justified on the following grounds:

• Electrical equivalence is complete across all rated parameters, ensuring drop-in compatibility in circuit applications
• The substitute maintains UL approval certification, preserving regulatory compliance
• The substitute achieves ROHS3 compliance, whereas the main part is non-compliant, making it suitable for applications subject to RoHS requirements
• Active product status ensures long-term availability and supply chain continuity
• Bulk packaging of the substitute accommodates both production and maintenance inventory strategies

For applications where RoHS compliance is not a requirement, both parts are functionally interchangeable. For new designs or compliance-driven applications, the 0275030.MXL is the preferred selection.

Frequently Asked Questions (FAQ)

Q: Can the 0275030.MXL be used as a direct replacement for the 0275030.M in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The 0275030.MXL is a direct substitute with no circuit modifications required. The only differences are product status (active vs. obsolete) and RoHS compliance level.

Q: What is the difference between the two part numbers?

A: The suffix ".MXL" indicates bulk packaging and active product status. The electrical specifications, physical dimensions, and performance characteristics are identical to the ".M" variant.

Q: Are there any compatibility concerns with PCB footprints or mounting?

A: No. Both parts use identical through-hole axial mounting with the same physical dimensions (0.133" Dia x 0.310" L). PCB layouts designed for the 0275030.M require no modification for the 0275030.MXL.

Q: Which part should be selected for new product designs?

A: The 0275030.MXL should be selected for new designs. It is an active product with improved compliance status and guaranteed long-term availability.

Q: Does the RoHS compliance difference affect electrical performance?

A: No. RoHS compliance relates to material composition and environmental standards, not electrical or thermal performance. Both parts deliver identical circuit protection characteristics.

Q: What is the melting I²t value and why is it important?

A: The melting I²t of 288 defines the thermal energy required to melt the fuse element. This value is identical for both parts and ensures consistent overcurrent protection response in the 30A fast-blow category.