Littelfuse 027301.5V Equivalent & Substitute Parts

Part Overview

The Littelfuse 027301.5V is a 1.5 A, 125 V AC/DC board mount fuse in the MICRO™ 273 series, designed for through-hole radial mounting in electronic circuits requiring fast-blow protection. This component is classified as Active product status with full compliance to RoHS3, REACH, and major approval agencies including UL, CSA, and QPL. Substitute parts are identified when identical electrical and mechanical parameters are maintained across the same product series and manufacturing standards.

Substiute Parts

027301.5V

Littelfuse Inc.In Stock: 954027301.5V Datasheet

Current PartRFQ

027301.5H

LittelfuseIn Stock: 1547027301.5H Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 027301.5V are identified based on strict equivalence across all critical electrical and mechanical parameters. The substitution logic is based on the following criteria:

• Current Rating: 1.5 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: Radial, Can, Vertical (exact match required)
• Breaking Capacity: 10 kA (exact match required)
• Melting I²t: 0.16 (exact match required)
• Operating Temperature Range: -55°C ~ 85°C (exact match required)
• Physical Dimensions: 0.250" Dia x 0.350" H (exact match required)
• DC Cold Resistance: 0.0578 Ohms (exact match required)

Only parts meeting all these parameters within the MICRO™ 273 series qualify as direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The 027301.5H is a direct parametric equivalent to the 027301.5V. Both components are manufactured by Littelfuse within the MICRO™ 273 series and maintain identical electrical specifications, mechanical dimensions, and thermal characteristics. Both parts carry Active product status and hold equivalent certifications from UL, CSA, and QPL. Both are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and use.

Selection between these two part numbers may be based on inventory availability, lead time, or procurement source, as no technical differentiation exists between them.

Frequently Asked Questions (FAQ)

Q: Can the 027301.5H replace the 027301.5V in existing circuit designs?

A: Yes. The 027301.5H is a direct parametric equivalent with identical current rating (1.5 A), voltage ratings (125 V AC/DC), response time (Fast Blow), mounting type (Through Hole), physical dimensions (0.250" Dia x 0.350" H), and all electrical characteristics. No circuit redesign or board layout modification is required.

Q: Are there any differences in approval certifications between these parts?

A: No. Both the 027301.5V and 027301.5H carry identical approvals from UL, CSA, and QPL, and both meet RoHS3 and REACH compliance requirements.

Q: What determines whether a fuse can be substituted in this product category?

A: Substitution is determined by exact equivalence across current rating, voltage ratings (AC and DC), response time, mounting type, package configuration, breaking capacity, melting I²t, operating temperature range, physical dimensions, and DC cold resistance. All these parameters must match precisely.

Q: Can fuses with different current ratings be used interchangeably?

A: No. Current rating is a critical parameter. Only fuses rated at 1.5 A are suitable for circuits designed for the 027301.5V or 027301.5H. Using a different current rating will result in improper circuit protection.

Q: Are both parts suitable for both AC and DC applications?

A: Yes. Both the 027301.5V and 027301.5H are rated for 125 V AC and 125 V DC operation, making them suitable for either application within the specified voltage range.