0473003.YRT3L Equivalent & Substitute Parts

Part Overview

The Littelfuse 0473003.YRT3L is a 3 A, 125 V AC/DC board mount axial fuse from the PICO® II 473 series. This component is classified as obsolete, which necessitates identification of active equivalent alternatives for ongoing design support and procurement. The fuse is designed for through-hole mounting applications requiring slow-blow response characteristics with a 50 A breaking capacity at rated voltage.

Substiute Parts

0473003.YRT3L

Littelfuse Inc.In Stock: 10550473003.YRT3L Datasheet

Current PartRFQ

0473003.HAT1L

Littelfuse Inc.In Stock: 10640473003.HAT1L Datasheet

Parametric EquivalentRFQ

0473003.MAT1L

Littelfuse Inc.In Stock: 18940473003.MAT1L Datasheet

Parametric EquivalentRFQ

0473003.MRT1L

Littelfuse Inc.In Stock: 24630473003.MRT1L Datasheet

Parametric EquivalentRFQ

0473003.YRT1L

LittelfuseIn Stock: 201860473003.YRT1L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 0473003.YRT3L 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)
• Fuse Type: Board Mount, Axial configuration (exact match required)
• Breaking Capacity: 50 A @ rated voltage (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)
• Approval Agencies: CSA, PSE, UR (exact match required)

All substitute parts listed below meet these criteria and are sourced from Littelfuse Inc., the original manufacturer. Packaging format differences (Cut Tape vs. other formats) do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts (0473003.HAT1L, 0473003.MAT1L, 0473003.MRT1L, and 0473003.YRT1L) are direct parametric equivalents to the obsolete 0473003.YRT3L. Each substitute maintains identical electrical specifications, mechanical dimensions, and regulatory certifications (CSA, PSE, UR).

The primary distinction among substitutes is product status and inventory availability. The 0473003.YRT1L offers the highest inventory level (20,100 pcs) and active product status, making it the preferred selection for new designs and long-term supply chain stability. The 0473003.MRT1L provides the second-highest inventory (2,400 pcs) with active status. Both 0473003.HAT1L and 0473003.MAT1L are active alternatives with lower inventory levels.

All substitutes are ROHS3 compliant and carry REACH Unaffected status where documented. Packaging format differences (Cut Tape) do not affect functional compatibility in through-hole board mount applications.

Frequently Asked Questions (FAQ)

Q: Can 0473003.YRT1L be used as a direct replacement for 0473003.YRT3L?

A: Yes. The 0473003.YRT1L is a parametric equivalent with identical current rating (3 A), voltage ratings (125 V AC/DC), response time (Slow Blow), breaking capacity (50 A), physical dimensions (0.135" Dia x 0.280" L), and all regulatory approvals. The primary difference is product status: 0473003.YRT3L is obsolete while 0473003.YRT1L is active.

Q: Does packaging format affect compatibility?

A: No. All substitute parts are supplied in Cut Tape (CT) packaging format, which is a standard distribution method. This does not affect electrical performance or mechanical fit in through-hole board mount applications. The axial package and physical dimensions remain identical across all variants.

Q: Are all substitutes certified to the same regulatory standards?

A: Yes. All substitute parts carry identical approval agency certifications: CSA, PSE, and UR. All are ROHS3 compliant. Where documented, substitutes carry REACH Unaffected status.

Q: Which substitute should be selected for new designs?

A: The 0473003.YRT1L is recommended for new designs due to active product status and highest inventory availability (20,100 pcs). This ensures long-term supply chain continuity and manufacturer support.

Q: Are there any electrical performance differences between substitutes?

A: No. All substitutes maintain identical DC cold resistance (0.038 Ohms), melting I²t (21), and operating temperature range (-55°C ~ 125°C). Electrical performance is equivalent across all variants.