PFLT.260 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The PFLT.260 is a polymeric PTC resettable fuse manufactured by SCHURTER Inc., rated for 24V with a 2.6A hold current. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and procurement planning. The PFLT.260 operates across a temperature range of -45°C to 85°C and meets CSA, TUV, and UL approval standards. Due to its obsolete status, sourcing equivalent parts from active product lines is necessary for system maintenance and new design implementations.

Substiute Parts

PFLT.260

SCHURTER Inc.In Stock: 1151PFLT.260 Datasheet

Current PartRFQ

MF-LS260

Bourns Inc.In Stock: 777MF-LS260 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PFLT.260 is determined by strict equivalence across the following critical parameters:

• Voltage rating: 24V maximum
• Current hold (Ih): 2.6A maximum
• Current trip (It): 5.2A
• Resistance characteristics: Initial resistance minimum 25 mOhms, post-trip resistance maximum 76 mOhms
• Package type: Strap configuration
• Physical dimensions: 25.00mm L x 11.35mm W x 1.00mm maximum thickness
• Polymeric PTC technology type
• Time to trip: 5 seconds
• RoHS3 compliance

The MF-LS260 from Bourns Inc. meets all these parameters and qualifies as a direct functional equivalent.

Parameter Comparison

*The MF-LS260 operates from -40°C minimum, which is 5°C higher than the PFLT.260. This difference is acceptable for most applications but must be verified against system requirements if operation below -40°C is required.

Engineering Selection Recommendations

The MF-LS260 is the qualified substitute for the PFLT.260 based on the following factors:

• All critical electrical parameters match exactly: voltage, current hold, current trip, resistance characteristics, and time to trip
• Physical dimensions and package type are identical
• Both components are polymeric PTC resettable fuses with equivalent functional behavior
• The MF-LS260 is an active product with current manufacturing support, eliminating obsolescence risk
• Both components maintain ROHS3 compliance and REACH unaffected status
• TUV approval is common to both parts; the MF-LS260 adds cURus certification

The minor difference in minimum operating temperature (-40°C versus -45°C) requires application-level verification only if the system operates below -40°C. The difference in approval agencies (CSA/UL for PFLT.260 versus cURus for MF-LS260) should be evaluated against specific regulatory requirements for the end application.

Frequently Asked Questions (FAQ)

Q: Can the MF-LS260 be used as a direct replacement for the PFLT.260?

A: Yes. The MF-LS260 meets all critical electrical and mechanical parameters of the PFLT.260, including voltage rating, current hold and trip values, resistance characteristics, package dimensions, and polymeric PTC technology. Direct substitution is supported from an engineering standpoint.

Q: What is the significance of the operating temperature difference?

A: The PFLT.260 operates from -45°C to 85°C, while the MF-LS260 operates from -40°C to 85°C. The 5°C difference at the lower end affects only applications requiring operation below -40°C. For standard industrial and commercial applications operating above -40°C, this difference is not a limiting factor.

Q: Are the approval certifications equivalent?

A: Both components carry TUV approval. The PFLT.260 includes CSA and UL certifications, while the MF-LS260 includes cURus certification. The specific certifications required depend on the end application's regulatory jurisdiction. Applications requiring CSA or UL certification should verify that cURus certification meets their requirements, or confirm that TUV approval alone is sufficient.

Q: Is the strap package identical between both parts?

A: Yes. Both the PFLT.260 and MF-LS260 use identical strap package configuration with dimensions of 25.00mm L x 11.35mm W x 1.00mm maximum thickness. No mechanical redesign or board layout modification is required for substitution.

Q: Why is the PFLT.260 obsolete?

A: The PFLT.260 is classified as obsolete by SCHURTER Inc. The MF-LS260 from Bourns Inc. is an active product with ongoing manufacturing support, making it the recommended choice for new designs and system maintenance.

Q: What is the inventory status for these parts?

A: The PFLT.260 has 1104 pieces in stock as new original inventory. The MF-LS260 has 761 pieces in stock as new original inventory. Both are currently available for procurement.