Littelfuse 0257002.L Automotive Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0257002.L is a 2A 32VDC automotive blade fuse designed for ATO/ATC holder applications. This part carries an Obsolete product status, making identification of active equivalent components essential for ongoing system support and procurement planning. The fuse provides circuit protection in automotive electrical systems with a fast-blow response characteristic and 1kA breaking capacity at rated voltage.

Substiute Parts

0257002.L

Littelfuse Inc.In Stock: 8600257002.L Datasheet

Current PartRFQ

0287002.PXCN

Littelfuse Inc.In Stock: 156120287002.PXCN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 0257002.L has one direct substitute: 0287002.PXCN. This substitution is valid based on the following matching electrical and mechanical parameters:

• Current Rating: Both parts rated at 2 A
• Voltage Rating (DC): Both rated at 32 V
• Fuse Type: Both are automotive blade fuses
• Package / Case: Both use Blade, ATO/ATC form factor
• Breaking Capacity: Both rated at 1kA @ rated voltage
• Melting I²t: Both have 1.4 value
• Operating Temperature Range: Both operate -40°C ~ 105°C
• DC Cold Resistance: Both measure 0.0535 Ohms
• RoHS Compliance: Both ROHS3 Compliant

The primary distinction is product status: the 0257002.L is Obsolete, while the 0287002.PXCN is Active with significantly higher inventory availability (15,550 pcs vs. 836 pcs).

Parameter Comparison

Engineering Selection Recommendations

The 0287002.PXCN is the appropriate selection for new designs and ongoing procurement due to its Active product status. Both parts meet identical electrical specifications and mechanical form factors, ensuring direct functional compatibility in ATO/ATC holder applications.

The 0287002.PXCN carries UL approval certification, while the obsolete 0257002.L carries cULus approval. Both certifications satisfy automotive fuse standards for the specified voltage and current ratings.

Dimensional tolerances between the two parts are negligible (0.750" vs. 0.752" length; 0.200" vs. 0.201" width; 0.480" vs. 0.484" height), confirming mechanical interchangeability within standard holder specifications.

Frequently Asked Questions (FAQ)

Q: Can the 0287002.PXCN directly replace the 0257002.L in existing applications?

A: Yes. Both parts share identical electrical ratings (2A, 32VDC), breaking capacity (1kA), melting I²t (1.4), operating temperature range (-40°C to 105°C), and DC cold resistance (0.0535 Ohms). Both use the Blade, ATO/ATC package form factor and are ROHS3 compliant. Dimensional differences are within standard holder tolerances.

Q: What is the difference between the ATO® and ATOF® series designations?

A: The series designation reflects internal design evolution within Littelfuse's automotive fuse product line. Both series maintain identical electrical and mechanical specifications for this 2A 32VDC application. The ATOF® series (0287002.PXCN) is the current active production line.

Q: Why is the 0257002.L marked as Obsolete?

A: Obsolete status indicates the part is no longer in active production. The 0287002.PXCN represents the current equivalent offering from Littelfuse with superior inventory availability and active product support.

Q: Are there any compliance differences between the two parts?

A: Both parts are ROHS3 compliant. The 0257002.L carries cULus certification, while the 0287002.PXCN carries UL certification. Both certifications are valid for automotive fuse applications at the specified ratings.

Q: What is the significance of the "Fast Blow" response time listed for the 0287002.PXCN?

A: Fast Blow indicates the fuse responds quickly to overcurrent conditions. This characteristic is standard for automotive blade fuses in this current and voltage class and does not affect substitution compatibility.