Littelfuse 0272004.V Equivalent & Substitute Parts

Part Overview

The Littelfuse 0272004.V is a 4A 125VAC/VDC board mount radial fuse designed for through-hole applications. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing production and maintenance requirements. The MICRO™ 272 series fuse provides fast-blow protection with a 10kA breaking capacity and operates across a temperature range of -55°C to 125°C. Locating functionally equivalent active alternatives ensures design continuity and supply chain reliability.

Substiute Parts

0272004.V

Littelfuse Inc.In Stock: 8440272004.V Datasheet

Current PartRFQ

0273004.H

Littelfuse Inc.In Stock: 13750273004.H Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 0273004.H qualifies as a direct substitute for the 0272004.V based on the following critical electrical and mechanical parameters:

Matching Parameters:

• Current Rating: 4 A (identical)
• Voltage Rating AC: 125 V (identical)
• Voltage Rating DC: 125 V (identical)
• Response Time: Fast Blow (identical)
• Breaking Capacity @ Rated Voltage: 10kA (identical)
• Melting I²t: 1.38 (identical)
• DC Cold Resistance: 0.0202 Ohms (identical)
• Mounting Type: Through Hole (identical)
• Fuse Type: Board Mount (Cartridge Style Excluded) (identical)
• Package / Case: Radial, Can, Vertical (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Approval Agencies: CSA, QPL, UL (identical)

Differences:

• Operating Temperature Range: 0272004.V operates -55°C ~ 125°C; 0273004.H operates -55°C ~ 85°C
• Physical Dimensions: 0272004.V is 0.235" Dia x 0.287" H; 0273004.H is 0.250" Dia x 0.350" H
• Product Status: 0272004.V is Obsolete; 0273004.H is Active
• Series: 0272004.V is MICRO™ 272; 0273004.H is MICRO™ 273

The 0273004.H maintains all critical electrical protection characteristics while offering active product status and improved supply availability.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 0273004.H is the recommended substitute for the obsolete 0272004.V. Both components maintain identical electrical protection characteristics, including current rating, voltage ratings, response time, breaking capacity, and melting I²t values. Both hold equivalent certifications from CSA, QPL, and UL, ensuring compliance with the same regulatory standards.

The primary advantage of the 0273004.H is its active product status, providing assured long-term availability and supply chain continuity. The operating temperature range reduction from 125°C to 85°C is acceptable for most standard industrial and commercial applications operating within normal ambient conditions.

Physical dimension differences require PCB layout verification to confirm through-hole pad compatibility and clearance around the slightly larger radial can body of the 0273004.H. The increased diameter (0.250" vs 0.235") and height (0.350" vs 0.287") must be accommodated within the existing board design.

Frequently Asked Questions (FAQ)

Q: Can the 0273004.H directly replace the 0272004.V without circuit redesign?

A: Electrical substitution is direct due to identical current, voltage, response time, and breaking capacity ratings. Physical substitution requires PCB layout verification to confirm the slightly larger dimensions of the 0273004.H fit within available board space and clearance requirements.

Q: What is the significance of the operating temperature range difference?

A: The 0272004.V operates to 125°C while the 0273004.H operates to 85°C. For applications requiring sustained operation above 85°C ambient temperature, the temperature rating difference must be evaluated against actual operating conditions. Most standard industrial applications operate within the 0273004.H temperature range.

Q: Are both parts certified to the same standards?

A: Yes. Both the 0272004.V and 0273004.H hold identical approvals from CSA, QPL, and UL, ensuring equivalent regulatory compliance and safety certification status.

Q: Why are the physical dimensions different between these parts?

A: The 0272004.V (MICRO™ 272 series) and 0273004.H (MICRO™ 273 series) represent different product generations within Littelfuse's fuse portfolio. The 0273004.H represents the current active generation with improved availability and supply continuity.

Q: What is the impact of the dimension change on PCB design?

A: The 0273004.H has a larger radial can body (0.250" diameter vs 0.235", and 0.350" height vs 0.287"). Verify that existing through-hole pad spacing, component clearances, and board layout accommodate these dimensions before implementation.

Q: Is the 0273004.H available in the same packaging as the 0272004.V?

A: The 0272004.V was supplied in standard packaging, while the 0273004.H is available in bulk packaging. Confirm packaging requirements for your procurement and assembly processes.