Littelfuse 0473003.YAT6L Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0473003.YAT6L is a 3A 125VAC/VDC board mount fuse in the PICO® II 473 series, designed for through-hole axial mounting applications. This slow-blow fuse provides circuit protection in industrial and commercial electronics requiring reliable overcurrent protection at 125V AC or DC. The part is currently active in production with full compliance to international safety standards (CSA, PSE, UR). Identifying equivalent substitute parts is essential for supply chain continuity, inventory optimization, and ensuring uninterrupted component availability across manufacturing operations.

Substiute Parts

0473003.YAT6L

Littelfuse Inc.In Stock: 7930473003.YAT6L Datasheet

Current PartRFQ

0473003.MAT1L

Littelfuse Inc.In Stock: 18940473003.MAT1L Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0473003.YAT6L is determined by strict equivalence across the following critical parameters:

• Current Rating: 3 A (exact match required)
• Voltage Rating: 125V AC and 125V 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)
• Physical Dimensions: 0.135" Dia x 0.280" L (exact match required)
• Breaking Capacity: 50A @ Rated Voltage (exact match required)
• Melting I²t: 21 (exact match required)
• DC Cold Resistance: 0.038 Ohms (exact match required)
• Approval Agencies: CSA, PSE, UR (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

The substitute part 0473003.MAT1L meets all electrical and mechanical parameters identically to the main part. The only difference is packaging format: the main part is supplied in Tape & Box (TB) configuration, while the substitute is supplied in Cut Tape (CT) configuration. Both are manufactured by Littelfuse Inc. and belong to the same PICO® II 473 series.

Parameter Comparison

Engineering Selection Recommendations

Both the 0473003.YAT6L and 0473003.MAT1L are active production parts manufactured by Littelfuse Inc. with identical electrical and mechanical specifications. Selection between these parts should be based on packaging and supply requirements:

• 0473003.YAT6L (Tape & Box): Select when bulk quantities with protective packaging are required for storage and distribution.
• 0473003.MAT1L (Cut Tape): Select when component-level pick-and-place automation or smaller quantity requirements favor cut tape packaging.

Both parts carry full compliance with CSA, PSE, and UR approval agencies, ROHS3 certification, and REACH unaffected status. Either part is suitable for direct substitution in circuit protection applications requiring 3A slow-blow fuse protection at 125V AC/DC with through-hole axial mounting.

Frequently Asked Questions (FAQ)

Q: Can 0473003.MAT1L be used as a direct replacement for 0473003.YAT6L?

A: Yes. Both parts are electrically and mechanically identical. The only difference is packaging format (Tape & Box versus Cut Tape). Direct substitution is valid for all circuit protection applications.

Q: Does packaging format affect fuse performance or reliability?

A: No. Packaging format (TB or CT) affects only component handling, storage, and assembly logistics. Electrical performance, response characteristics, and reliability are identical between the two parts.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts carry identical approvals (CSA, PSE, UR), RoHS3 compliance, and REACH unaffected status. Regulatory and safety performance is equivalent.

Q: What determines whether a fuse can substitute for the 0473003.YAT6L?

A: Substitution requires exact equivalence in current rating (3A), voltage rating (125V AC/DC), response time (Slow Blow), mounting type (Through Hole), physical dimensions (0.135" Dia x 0.280" L), breaking capacity (50A), melting I²t (21), and DC cold resistance (0.038 Ohms).

Q: Can I use a different current rating or voltage rating fuse as a substitute?

A: No. Current and voltage ratings are non-negotiable parameters. Using a fuse with different electrical ratings will result in incorrect circuit protection and potential equipment damage or safety hazards.

Q: Is the axial package format interchangeable with other fuse package styles?

A: No. The axial through-hole configuration is specific to PCB layout and mounting hole design. Cartridge-style or other package formats are not compatible with this application.