Littelfuse 025104.6MAT1L Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 025104.6MAT1L is an active, through-hole board mount fuse rated at 4.6 A, 125 V AC/DC with fast-blow response characteristics. This component is designed for circuit protection in applications requiring reliable overcurrent interruption at specified voltage levels. The part is ROHS3 compliant and carries multiple international approvals including CSA, cURus, PSE, and TUV certification. Substitute parts are identified when identical electrical and mechanical parameters are maintained across the same product series, ensuring direct functional equivalence without design modification.

Substiute Parts

025103.5MAT1L

Littelfuse Inc.In Stock: 955025103.5MAT1L Datasheet

Current PartRFQ

025103.5HAT1L

Littelfuse Inc.In Stock: 1112025103.5HAT1L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Littelfuse 025104.6MAT1L is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part 025104.6HAT1L maintains identical specifications in the following key areas:

• Current Rating: 4.6 A
• Voltage Rating: 125 V AC / 125 V DC
• Response Time: Fast Blow
• Breaking Capacity: 50 A AC, 300 A DC
• Melting I²t: 1.58
• Physical Dimensions: 0.110" Dia x 0.280" L
• DC Cold Resistance: 0.024 Ohms
• Operating Temperature Range: -55°C to 125°C
• Mounting Configuration: Through Hole, Axial Package
• Regulatory Compliance: ROHS3, CSA, cURus, PSE, TUV

Both parts belong to the PICO® II 251 series and are classified as active products with identical packaging (Cut Tape). Substitution is valid only when all parameters listed above remain unchanged in the application circuit.

Parameter Comparison

Engineering Selection Recommendations

Both the Littelfuse 025104.6MAT1L and 025104.6HAT1L are active products with identical electrical ratings, mechanical dimensions, and regulatory certifications. Selection between these parts is based on availability and supply chain considerations rather than technical differentiation. Both components carry CSA, cURus, PSE, and TUV approvals, confirming compliance with international safety standards. ROHS3 compliance is maintained across both part numbers, satisfying environmental and hazardous substance restrictions. The identical breaking capacity (50 A AC, 300 A DC) and melting I²t value (1.58) ensure equivalent circuit protection performance. Direct substitution is permissible in all applications where the 025104.6MAT1L is specified, provided the through-hole axial mounting configuration and 125 V AC/DC rating remain compatible with the circuit design.

Frequently Asked Questions (FAQ)

Q: Can the 025104.6HAT1L be used as a direct replacement for the 025104.6MAT1L?

A: Yes. Both parts are parametrically equivalent across all electrical and mechanical specifications, including current rating, voltage rating, response time, physical dimensions, and regulatory certifications. Direct substitution is valid without circuit modification.

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

A: Substitution is valid only when the following parameters remain identical: current rating (4.6 A), voltage rating (125 V AC/DC), response time (Fast Blow), breaking capacity (50 A AC, 300 A DC), melting I²t (1.58), physical dimensions (0.110" Dia x 0.280" L), and mounting type (through-hole axial). Any deviation in these parameters requires re-evaluation of circuit compatibility.

Q: Are there differences in packaging or lead configuration between these parts?

A: No. Both parts are supplied in Cut Tape (CT) packaging with identical axial lead configuration and physical dimensions (0.110" Dia x 0.280" L / 2.80 mm x 7.11 mm). PCB footprint and mounting hole spacing are identical.

Q: Do both parts carry the same regulatory approvals?

A: Yes. Both the 025104.6MAT1L and 025104.6HAT1L carry CSA, cURus, PSE, and TUV certifications. Both are ROHS3 compliant and REACH unaffected.

Q: What is the operating temperature range for these fuses?

A: Both parts operate across the temperature range of -55°C to 125°C. This range applies to all electrical and mechanical specifications.

Q: Is there a difference in DC cold resistance between the two parts?

A: No. Both parts have identical DC cold resistance of 0.024 Ohms, ensuring equivalent voltage drop characteristics in DC circuit applications.