Littelfuse 0473003.YRT1 Equivalent & Substitute Parts

Part Overview

The Littelfuse 0473003.YRT1 is a 3 A, 125 V AC/DC board mount axial fuse from the PICO® II 473 series. This component is classified as obsolete, with 835 pieces currently in stock. Due to its obsolete status, identifying active equivalent parts is essential for ongoing design support, production continuity, and long-term component availability. The substitute parts listed maintain identical electrical and mechanical specifications while offering improved product status and compliance certifications.

Substiute Parts

0473003.YRT1

Littelfuse Inc.In Stock: 8900473003.YRT1 Datasheet

Current PartRFQ

0473003.MRT1L

Littelfuse Inc.In Stock: 24630473003.MRT1L Datasheet

DirectRFQ

0473003.HAT1L

Littelfuse Inc.In Stock: 10640473003.HAT1L Datasheet

Parametric EquivalentRFQ

0473003.MAT1L

Littelfuse Inc.In Stock: 18940473003.MAT1L Datasheet

Parametric EquivalentRFQ

0473003.YRT1L

LittelfuseIn Stock: 201860473003.YRT1L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0473003.YRT1 is determined by strict equivalence across the following critical parameters:

• Current Rating: 3 A (exact match required)
• Voltage Rating: 125 V AC and 125 V DC (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Axial (exact match required)
• Breaking Capacity @ Rated Voltage: 50 A (exact match required)
• Melting I²t: 21 (exact match required)
• Physical Dimensions: 0.135" Dia x 0.280" L (exact match required)
• DC Cold Resistance: 0.038 Ohms (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Approval Agencies: CSA, PSE, UR (exact match required)

All four substitute parts (0473003.MRT1L, 0473003.HAT1L, 0473003.MAT1L, and 0473003.YRT1L) meet these criteria and are direct parametric equivalents within the PICO® II 473 series.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts are parametrically equivalent to the 0473003.YRT1 and maintain identical electrical and mechanical specifications. Selection among the active alternatives should be based on the following factors:

Product Status: The main part 0473003.YRT1 is obsolete. All substitute parts (0473003.MRT1L, 0473003.HAT1L, 0473003.MAT1L, and 0473003.YRT1L) are active products, ensuring long-term availability and continued manufacturer support.

Compliance: The main part is RoHS non-compliant. All substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components in regulated markets.

Packaging: The main part has unspecified packaging. All substitute parts are supplied in Cut Tape (CT) format, which is standard for automated assembly processes.

Inventory Availability: The 0473003.YRT1L offers the highest inventory level at 20,100 pieces, followed by 0473003.MRT1L at 2,400 pieces, 0473003.MAT1L at 1,851 pieces, and 0473003.HAT1L at 1,030 pieces.

Frequently Asked Questions (FAQ)

Q: Can the substitute parts be used as direct replacements for the 0473003.YRT1?

A: Yes. All four substitute parts are parametrically equivalent. They share identical current ratings (3 A), voltage ratings (125 V AC/DC), response time (Slow Blow), mounting type (Through Hole), package type (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 range (-55°C ~ 125°C), and approval agencies (CSA, PSE, UR).

Q: Why is the main part 0473003.YRT1 listed as obsolete?

A: The 0473003.YRT1 is classified as obsolete by the manufacturer. The active substitute parts within the PICO® II 473 series provide equivalent functionality with improved product status and compliance certifications.

Q: What is the difference between the substitute parts?

A: All substitute parts are electrically and mechanically identical. The primary differences are product status (all active), RoHS compliance (all ROHS3 compliant), and inventory availability. The 0473003.YRT1L has the highest stock level.

Q: Are there any compliance differences between the main part and substitutes?

A: Yes. The main part 0473003.YRT1 is RoHS non-compliant, while all substitute parts are ROHS3 compliant and REACH unaffected. This makes the substitutes suitable for applications requiring regulatory compliance.

Q: Does packaging format affect electrical performance?

A: No. All parts maintain identical electrical specifications. The Cut Tape (CT) packaging of the substitute parts is standard for automated assembly and does not affect component performance or compatibility.

Q: Which substitute part should be selected for new designs?

A: For new designs, any of the four active substitute parts is suitable. The 0473003.YRT1L is recommended due to its highest inventory availability and active product status, ensuring long-term supply chain stability.