LTP260F Equivalent & Substitute Parts

Part Overview

The LTP260F is a polymeric PTC resettable fuse manufactured by Littelfuse Inc., rated for 24V maximum voltage with a 2.6A hold current. This component is designed for overcurrent protection in electronic circuits requiring automatic reset capability without manual intervention. The LTP260F operates across a temperature range of -40°C to 85°C and features a strap mounting configuration.

The LTP260F is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

LTP260F

Littelfuse Inc.In Stock: 953LTP260F Datasheet

Current PartRFQ

MF-LS260

Bourns Inc.In Stock: 777MF-LS260 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LTP260F is determined by strict equivalence across the following critical parameters:

• Voltage rating: 24V maximum
• Hold current (Ih): 2.6A maximum
• Trip current (It): 5.2A
• Time to trip: 5 seconds
• Initial resistance (Ri): 25 mOhms minimum
• Post-trip resistance (R1): 76 mOhms maximum
• Operating temperature range: -40°C to 85°C
• Component type: Polymeric PTC resettable fuse
• Mounting configuration: Strap
• Physical dimensions: 25.00mm L x 11.35mm W x 1.00mm thickness maximum

The MF-LS260 manufactured by Bourns Inc. meets all specified electrical and mechanical parameters, establishing it as a direct functional equivalent for the obsolete LTP260F.

Parameter Comparison

Engineering Selection Recommendations

The MF-LS260 is the primary substitute for the obsolete LTP260F. Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The MF-LS260 carries active product status from Bourns Inc., ensuring ongoing availability and supply chain support.

The MF-LS260 holds cURus and TUV approvals, compared to the LTP260F's CSA, TUV, and UL approvals. Both components satisfy the same electrical protection requirements and dimensional constraints. The MF-LS260 features a moisture sensitivity level of 1 (Unlimited), providing superior moisture handling compared to the LTP260F's MSL 2A (4 Weeks) rating.

Selection of the MF-LS260 is supported by complete electrical parameter equivalence, identical physical form factor, and active manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can the MF-LS260 directly replace the LTP260F in existing designs?

A: Yes. The MF-LS260 matches all critical electrical parameters (voltage, hold current, trip current, resistance values, and time to trip) and physical dimensions of the LTP260F. The strap mounting configuration is identical, enabling direct substitution in existing PCB layouts and assemblies.

Q: What are the key differences between the LTP260F and MF-LS260?

A: The primary differences are manufacturer (Littelfuse vs. Bourns), product status (obsolete vs. active), and moisture sensitivity level (MSL 2A vs. MSL 1). Electrical performance and physical form factor are equivalent. Approval agencies differ slightly (CSA/TUV/UL vs. cURus/TUV), but both meet applicable regulatory standards.

Q: Are there any compatibility concerns with the strap package configuration?

A: No. Both components use identical strap mounting with matching dimensions (25.00mm L x 11.35mm W x 1.00mm thickness). Existing mechanical mounting and electrical connection points are fully compatible.

Q: Does the MF-LS260 meet the same regulatory compliance as the LTP260F?

A: Yes. Both components are ROHS3 compliant, REACH unaffected, and classified under the same ECCN (EAR99) and HTSUS (8533.40.8070) codes. The MF-LS260's improved moisture sensitivity level (MSL 1) provides enhanced environmental protection.

Q: What is the current availability status of these components?

A: The LTP260F is obsolete. The MF-LS260 is active and in production, with documented inventory availability supporting ongoing procurement requirements.