Littelfuse 0473003.HAT1L Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0473003.HAT1L is a 3A 125VAC/VDC board mount fuse with axial through-hole configuration, designed for circuit protection in electronic equipment. This fuse operates with slow-blow response characteristics and is housed in the PICO® II 473 series package. The part maintains active product status with full compliance to international safety and environmental standards. Substitute parts are identified when identical electrical and mechanical parameters are required for component replacement or procurement alternatives.

Substiute Parts

0473003.HAT1L

Littelfuse Inc.In Stock: 10640473003.HAT1L Datasheet

Current PartRFQ

0473003.MAT1L

Littelfuse Inc.In Stock: 18940473003.MAT1L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0473003.HAT1L are identified based on strict equivalence across the following critical parameters:

• Current Rating: 3 A
• Voltage Rating: 125 V AC / 125 V DC
• Response Time: Slow Blow
• Mounting Type: Through Hole
• Package Configuration: Axial
• Breaking Capacity: 50 A
• Melting I²t: 21
• Physical Dimensions: 0.135" Dia x 0.280" L
• DC Cold Resistance: 0.038 Ohms
• Operating Temperature: -55°C ~ 125°C
• Compliance: ROHS3, CSA, PSE, UR

Parts meeting all these parameters are classified as direct parametric equivalents and may be used interchangeably in circuit protection applications requiring identical electrical and mechanical characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both the 0473003.HAT1L and 0473003.MAT1L are active products from Littelfuse Inc. with identical electrical and mechanical specifications. Selection between these parts may be based on procurement availability and inventory status. Both parts maintain full compliance with ROHS3 regulations and carry approvals from CSA, PSE, and UR certification bodies, confirming suitability for regulated applications. The parts are functionally interchangeable for all circuit protection applications requiring 3A slow-blow fuse protection at 125VAC/VDC ratings.

Frequently Asked Questions (FAQ)

Q: Can 0473003.MAT1L be used as a direct replacement for 0473003.HAT1L?

A: Yes. Both parts are parametric equivalents with identical current ratings, voltage ratings, response characteristics, physical dimensions, and regulatory approvals. They are interchangeable in circuit protection applications.

Q: What determines if a fuse is a valid substitute?

A: Valid substitutes must match all critical parameters: current rating (3A), voltage rating (125V AC/DC), response time (slow blow), mounting type (through hole), package style (axial), breaking capacity (50A), melting I²t (21), physical dimensions (0.135" Dia x 0.280" L), and operating temperature range (-55°C ~ 125°C).

Q: Are both parts available in the same packaging format?

A: Yes. Both 0473003.HAT1L and 0473003.MAT1L are supplied in Cut Tape (CT) packaging, suitable for automated assembly processes.

Q: Do both parts carry the same regulatory approvals?

A: Yes. Both parts are certified by CSA, PSE, and UR, and both comply with ROHS3 environmental standards.

Q: What is the difference between these two part numbers?

A: The parts are electrically and mechanically identical. The difference in part number designation (HAT1L vs. MAT1L) reflects different manufacturing tape configurations or procurement batches from Littelfuse Inc., but does not affect functional performance or compatibility.