Littelfuse 0473003.YAT1L Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0473003.YAT1L is a 3A 125VAC/VDC board mount fuse in axial through-hole configuration, part of the PICO® II 473 series. This slow-blow fuse is designed for circuit protection in applications requiring reliable overcurrent protection at low voltage levels. The part maintains active product status with full compliance to CSA, PSE, and UR approval agencies. Substitute parts are identified when packaging or inventory requirements necessitate alternative sourcing while maintaining identical electrical and mechanical performance.

Substiute Parts

0473003.YAT1L

Littelfuse Inc.In Stock: 11870473003.YAT1L Datasheet

Current PartRFQ

0473003.MAT1L

Littelfuse Inc.In Stock: 18940473003.MAT1L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 0473003.MAT1L is a parametric equivalent to the 0473003.YAT1L. Substitution is valid based on the following criteria:

Identical Electrical Parameters:

• Current Rating: 3 A
• Voltage Rating (AC/DC): 125 V
• Response Time: Slow Blow
• Breaking Capacity: 50 A
• Melting I²t: 21
• DC Cold Resistance: 0.038 Ohms

Identical Mechanical Parameters:

• Mounting Type: Through Hole
• Package / Case: Axial
• Size / Dimension: 0.135" Dia x 0.280" L (3.43mm x 7.11mm)

Identical Compliance & Environmental:

• Operating Temperature Range: -55°C ~ 125°C
• RoHS Status: ROHS3 Compliant
• Approval Agencies: CSA, PSE, UR
• Series: PICO® II 473

The only difference between these parts is the packaging format: 0473003.YAT1L is supplied in Tape & Box (TB) format, while 0473003.MAT1L is supplied in Cut Tape (CT) format. Both parts are manufactured by Littelfuse Inc. and maintain active product status.

Parameter Comparison

Engineering Selection Recommendations

Both the 0473003.YAT1L and 0473003.MAT1L are active products from Littelfuse Inc. with identical electrical, mechanical, and compliance characteristics. Selection between these parts should be based on packaging requirements and inventory availability:

• 0473003.YAT1L (Tape & Box): Suitable for applications requiring boxed packaging format with tape reel configuration.
• 0473003.MAT1L (Cut Tape): Suitable for applications where cut tape packaging is preferred or required for assembly processes.

Both parts carry full compliance certifications (CSA, PSE, UR) and ROHS3 compliance status, making them interchangeable from an engineering and regulatory perspective. The choice between them is driven by supply chain, assembly equipment compatibility, and packaging logistics rather than technical performance.

Frequently Asked Questions (FAQ)

Q: Can 0473003.MAT1L be used as a direct replacement for 0473003.YAT1L?

A: Yes. Both parts are parametric equivalents with identical electrical ratings (3A, 125VAC/VDC), response characteristics (Slow Blow), mechanical dimensions (0.135" Dia x 0.280" L), and regulatory approvals (CSA, PSE, UR). The only difference is packaging format.

Q: What is the difference between Tape & Box (TB) and Cut Tape (CT) packaging?

A: Tape & Box packaging supplies components on a reel within a protective box, while Cut Tape packaging supplies components on tape segments cut to specified lengths. Both formats contain the same component; the difference is in delivery and handling format.

Q: Are there any performance differences between these substitute parts?

A: No. Both parts have identical electrical performance, including current rating (3A), voltage rating (125VAC/VDC), breaking capacity (50A), melting I²t (21), and DC cold resistance (0.038 Ohms).

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both 0473003.YAT1L and 0473003.MAT1L carry identical approvals from CSA, PSE, and UR, and both are ROHS3 compliant.

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

A: Both parts operate across the temperature range of -55°C to 125°C.

Q: Can these fuses be used in both AC and DC circuits?

A: Yes. Both parts are rated for 125V AC and 125V DC operation, making them suitable for either circuit type at the specified voltage levels.