Littelfuse 0272005.H Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0272005.H is a 5A 125VAC/VDC board mount fuse with radial, can-style vertical packaging designed for through-hole mounting applications. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations. The MICRO™ 272 series fuse provides fast-blow response characteristics with 10kA breaking capacity at rated voltage, suitable for general-purpose circuit protection in industrial and commercial equipment.

Substiute Parts

0272005.H

Littelfuse Inc.In Stock: 9600272005.H Datasheet

Current PartRFQ

0273005.H

Littelfuse Inc.In Stock: 11830273005.H Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 0273005.H qualifies as a direct substitute for the 0272005.H based on the following critical electrical and mechanical parameters:

Matching Parameters:

• Current Rating: 5 A (identical)
• Voltage Rating AC: 125 V (identical)
• Voltage Rating DC: 125 V (identical)
• Response Time: Fast Blow (identical)
• Mounting Type: Through Hole (identical)
• Package Style: Radial, Can, Vertical (identical)
• Breaking Capacity: 10 kA @ Rated Voltage (identical)
• DC Cold Resistance: 0.0156 Ohms (identical)
• Melting I²t: 2.21 (identical)
• Approval Agencies: CSA, QPL, UL (identical)

Allowable Variations:

• Operating Temperature Range: 0273005.H operates -55°C to 85°C versus 0272005.H at -55°C to 125°C. The substitute has a narrower upper temperature limit but maintains the lower limit.
• Physical Dimensions: 0273005.H measures 0.250" Dia × 0.350" H (6.35mm × 8.89mm) versus 0272005.H at 0.235" Dia × 0.287" H (5.97mm × 7.30mm). Both maintain radial, can-style vertical configuration suitable for through-hole PCB mounting.
• Series Designation: MICRO™ 273 (substitute) versus MICRO™ 272 (original). Both are Littelfuse MICRO™ series products.
• Product Status: 0273005.H is Active, ensuring ongoing availability and support.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 0273005.H is the manufacturer-recommended substitute for the obsolete 0272005.H. Selection of this substitute is justified on the following engineering grounds:

Electrical Equivalence: All critical electrical parameters—current rating, voltage ratings (AC and DC), response time, breaking capacity, and melting I²t—are identical between the original and substitute parts. This ensures equivalent circuit protection performance.

Regulatory Compliance: Both parts maintain identical approval certifications (CSA, QPL, UL) and RoHS3 compliance status, satisfying regulatory and environmental requirements for the application.

Mechanical Compatibility: Both parts employ identical through-hole mounting and radial, can-style vertical packaging. The substitute's slightly larger physical dimensions (0.250" Dia × 0.350" H versus 0.235" Dia × 0.287" H) require verification of PCB footprint clearance in existing designs, but the mounting interface remains compatible.

Temperature Consideration: The substitute operates across -55°C to 85°C, compared to the original's -55°C to 125°C range. Applications requiring sustained operation above 85°C require thermal analysis to confirm the substitute's suitability.

Availability: The 0273005.H is in active production status with documented inventory availability, ensuring supply chain continuity for new designs and field replacements.

Frequently Asked Questions (FAQ)

Q: Can the 0273005.H be used as a direct drop-in replacement for the 0272005.H?

A: Yes, for applications operating within the -55°C to 85°C temperature range. The electrical characteristics, current rating, voltage ratings, response time, and breaking capacity are identical. Physical dimensions are slightly larger; verify PCB footprint clearance before implementation.

Q: What is the significance of the different operating temperature ranges?

A: The original 0272005.H operates to 125°C, while the substitute 0273005.H operates to 85°C. For applications with sustained operation above 85°C, thermal analysis is required to confirm the substitute's suitability. For standard industrial applications operating within 85°C, this difference is not a limiting factor.

Q: Are the physical dimensions different, and does this affect mounting?

A: Yes, the 0273005.H is slightly larger (0.250" Dia × 0.350" H) compared to the 0272005.H (0.235" Dia × 0.287" H). Both maintain radial, can-style vertical through-hole configuration. Verify that the PCB footprint and surrounding component placement accommodate the larger dimensions before design implementation.

Q: Do both parts have the same regulatory approvals?

A: Yes. Both the 0272005.H and 0273005.H carry identical CSA, QPL, and UL approvals, and both are ROHS3 compliant. No regulatory re-qualification is required when substituting the 0273005.H.

Q: Why is the 0272005.H listed as obsolete?

A: The 0272005.H is classified as obsolete by Littelfuse, indicating it is no longer in active production. The 0273005.H, from the newer MICRO™ 273 series, is the current production equivalent and is recommended for all new designs and field replacements.

Q: What is the difference between the MICRO™ 272 and MICRO™ 273 series?

A: Both are Littelfuse MICRO™ series board mount fuses with identical electrical specifications for this 5A 125VAC/VDC application. The MICRO™ 273 series represents the current production line, while MICRO™ 272 is obsolete. The substitution is based on electrical and mechanical equivalence within the Littelfuse product family.

Q: Are there any other substitutes available?

A: Based on the provided data, the 0273005.H is the manufacturer-recommended substitute. No additional alternatives are documented in this reference.