Littelfuse 027401.5V Equivalent & Substitute Parts

Part Overview

The Littelfuse 027401.5V is a 1.5 A board mount fuse rated for 125 V AC/DC operation with fast blow response characteristics. This component is designed for through-hole radial mounting in radial can vertical package configuration. The part maintains active product status with full compliance to RoHS3, REACH, and international approval agencies including CSA, QPL, and UL certification. Substitute parts are identified to provide design flexibility when primary inventory is unavailable or when alternative series options are required for specific application requirements.

Key Parameters

Parameter	Specification
Current Rating	1.5 A
Voltage Rating (AC)	125 V
Voltage Rating (DC)	125 V
Response Time	Fast Blow
Mounting Type	Through Hole
Fuse Type	Board Mount (Cartridge Style Excluded)
Package / Case	Radial, Can, Vertical
Breaking Capacity @ Rated Voltage	10 kA
Melting I²t	0.16
Size / Dimension	0.250" Dia x 0.350" H (6.35 mm x 8.89 mm)
DC Cold Resistance	0.0578 Ohms
Approval Agency	CSA, QPL, UL
RoHS Status	ROHS3 Compliant
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the Littelfuse 027401.5V is determined by strict equivalence across the following critical parameters:

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) Fuse Type: Board Mount, Cartridge Style Excluded (exact match required) Package / Case: Radial, Can, Vertical (exact match required) Breaking Capacity: 10 kA @ Rated Voltage (exact match required) Melting I²t: 0.16 (exact match required) Physical Dimensions: 0.250" Dia x 0.350" H / 6.35 mm x 8.89 mm (exact match required) DC Cold Resistance: 0.0578 Ohms (exact match required)

The identified substitute part 027301.5H belongs to the Littelfuse MICRO™ 273 series and maintains full parametric equivalence across all electrical and mechanical specifications. Both parts are manufactured by Littelfuse Inc. and carry identical approval certifications.

Parameter Comparison

Parameter	027401.5V (MICRO™ 274)	027301.5H (MICRO™ 273)	Match Status
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Equivalent
Current Rating (Amps)	1.5 A	1.5 A	Equivalent
Voltage Rating - AC	125 V	125 V	Equivalent
Voltage Rating - DC	125 V	125 V	Equivalent
Response Time	Fast Blow	Fast Blow	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Fuse Type	Board Mount (Cartridge Style Excluded)	Board Mount (Cartridge Style Excluded)	Equivalent
Package / Case	Radial, Can, Vertical	Radial, Can, Vertical	Equivalent
Breaking Capacity @ Rated Voltage	10 kA	10 kA	Equivalent
Melting I²t	0.16	0.16	Equivalent
Size / Dimension	0.250" Dia x 0.350" H (6.35 mm x 8.89 mm)	0.250" Dia x 0.350" H (6.35 mm x 8.89 mm)	Equivalent
DC Cold Resistance	0.0578 Ohms	0.0578 Ohms	Equivalent
Approval Agency	CSA, QPL, UL	CSA, QPL, UL	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
REACH Status	REACH Unaffected	REACH Unaffected	Equivalent
Product Status	Active	Active	Equivalent

Engineering Selection Recommendations

Both the Littelfuse 027401.5V and 027301.5H maintain active product status with full regulatory compliance. The 027301.5H substitute part carries identical electrical ratings, mechanical dimensions, and approval certifications (CSA, QPL, UL). Both components are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Selection between these parts should be based on inventory availability and application-specific requirements. The 027301.5H is available in higher inventory quantity (1498 Pcs) compared to the 027401.5V (947 Pcs). Both parts are suitable for direct substitution in through-hole board mount applications requiring 1.5 A protection at 125 V AC/DC with fast blow response characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 027301.5H be used as a direct replacement for the 027401.5V?

A: Yes. The 027301.5H is a parametric equivalent with identical current rating (1.5 A), voltage ratings (125 V AC/DC), response time (fast blow), mounting type (through hole), package configuration (radial can vertical), breaking capacity (10 kA), melting I²t (0.16), physical dimensions (0.250" Dia x 0.350" H), and DC cold resistance (0.0578 Ohms). Both parts carry identical approval certifications and compliance status.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is determined by exact equivalence across current rating, voltage ratings (AC and DC), response time, mounting type, fuse type classification, package configuration, breaking capacity, melting I²t, physical dimensions, and DC cold resistance. Any deviation in these parameters disqualifies a part from direct substitution.

Q: Are there any differences in operating temperature specifications between these parts?

A: The 027401.5V does not specify an operating temperature range in the provided data. The 027301.5H specifies -55°C ~ 85°C operating temperature. This difference does not affect substitution eligibility for applications within the specified range of the 027301.5H.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both the 027401.5V and 027301.5H are certified by CSA, QPL, and UL. Both are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component use.

Q: What is the difference between the MICRO™ 274 and MICRO™ 273 series?

A: The 027401.5V belongs to the MICRO™ 274 series, while the 027301.5H belongs to the MICRO™ 273 series. Both series share identical electrical and mechanical specifications for this 1.5 A 125 V fast blow fuse configuration. Series designation reflects internal Littelfuse product line organization but does not affect functional equivalence.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message