Littelfuse 0447002.YP Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0447002.YP is a 2 A, 350 V AC / 125 V DC board mount fuse with fast blow response characteristics, designed for through-hole radial mounting in electronic circuit protection applications. This part is classified as obsolete, making identification of active equivalent substitutes essential for ongoing production and maintenance requirements. The substitute part maintains identical electrical and mechanical specifications while offering improved availability through active product status.

Substiute Parts

0447002.YP

Littelfuse Inc.In Stock: 11410447002.YP Datasheet

Current PartRFQ

0447002.YXP

Littelfuse Inc.In Stock: 51360447002.YXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 0447002.YXP qualifies as a direct substitute for the 0447002.YP based on strict equivalence across all critical electrical and mechanical parameters:

Substitution Criteria (All Parameters Match):

• Current Rating: 2 A (identical)
• Voltage Rating - AC: 350 V (identical)
• Voltage Rating - DC: 125 V (identical)
• Response Time: Fast Blow (identical)
• Mounting Type: Through Hole (identical)
• Fuse Type: Board Mount (Cartridge Style Excluded) (identical)
• Package / Case: Radial, Box (identical)
• Breaking Capacity @ Rated Voltage: 100 A AC, 50 A DC (identical)
• Operating Temperature Range: -40°C to 125°C (identical)
• DC Cold Resistance: 0.056 Ohms (identical)
• Physical Dimensions: 0.430" L x 0.150" W x 0.404" H (identical)
• Melting I²t: 2.8 (identical)
• Approval Agencies: CSA, METI, UL (identical)
• RoHS Status: ROHS3 Compliant (identical)

The primary distinction is product status: the original part is obsolete, while the substitute is active, with significantly higher inventory availability (5070 pcs vs. 1126 pcs).

Parameter Comparison

Engineering Selection Recommendations

The 0447002.YXP is the direct equivalent substitute for the obsolete 0447002.YP. Selection of the substitute part is based on the following engineering factors:

Product Status: The original part (0447002.YP) carries obsolete status, indicating discontinued manufacturing and limited future availability. The substitute (0447002.YXP) maintains active product status with full manufacturing support.

Regulatory Compliance: Both parts maintain identical certifications from CSA, METI, and UL, ensuring continued compliance with applicable standards and regulations.

Electrical and Mechanical Equivalence: All critical parameters—current rating, voltage ratings (AC and DC), response time, breaking capacity, operating temperature range, DC cold resistance, and physical dimensions—are identical between the main part and substitute.

RoHS Compliance: Both parts are ROHS3 compliant, meeting environmental and hazardous substance restrictions.

Packaging Consideration: The substitute is supplied in bulk packaging rather than box packaging. This difference does not affect electrical or mechanical performance and is a supply chain consideration only.

Frequently Asked Questions (FAQ)

Q: Can the 0447002.YXP be used as a direct replacement for the 0447002.YP in existing designs?

A: Yes. The 0447002.YXP is electrically and mechanically identical to the 0447002.YP across all specified parameters, including current rating, voltage ratings, response time, breaking capacity, operating temperature range, and physical dimensions. No design modifications are required.

Q: What is the difference between the box and bulk packaging options?

A: Box and bulk packaging refer to the quantity and presentation format for shipment and storage. Bulk packaging typically provides higher quantities per container. This distinction does not affect the electrical performance, mechanical fit, or functional characteristics of the fuse component itself.

Q: Are the regulatory certifications identical between these parts?

A: Yes. Both the 0447002.YP and 0447002.YXP carry identical approvals from CSA, METI, and UL. Both parts are ROHS3 compliant.

Q: Why is the original part marked as obsolete?

A: Obsolete status indicates that the manufacturer has discontinued production of the 0447002.YP. The 0447002.YXP represents the active equivalent, ensuring continued availability and manufacturing support.

Q: Are the physical dimensions identical for PCB mounting?

A: Yes. Both parts share identical dimensions of 0.430" L x 0.150" W x 0.404" H (10.92 mm x 3.81 mm x 10.26 mm) and identical through-hole radial mounting configuration. No PCB layout modifications are necessary.

Q: Is the DC cold resistance the same?

A: Yes. Both parts have identical DC cold resistance of 0.056 Ohms, ensuring equivalent electrical behavior in circuit applications.

Q: What is the melting I²t value, and is it the same for both parts?

A: The melting I²t value of 2.8 is identical for both parts. This parameter defines the thermal energy required to melt the fuse element and is critical for circuit protection coordination.