PFMF.260.2 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The PFMF.260.2 is a polymeric PTC resettable fuse manufactured by SCHURTER Inc., designed for surface mount applications in 1812 (4532 Metric) package format. This component provides overcurrent protection with a 6V maximum voltage rating and 2.6A hold current specification. The part is active in production with ROHS3 compliance and cURus/TUV approval certifications. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity across manufacturing environments.

Substiute Parts

PFMF.260.2

SCHURTER Inc.In Stock: 1301PFMF.260.2 Datasheet

Current PartRFQ

MF-MSMF260-2

Bourns Inc.In Stock: 34498MF-MSMF260-2 Datasheet

DirectRFQ

NANOSMDC200F-2

Littelfuse Inc.In Stock: 55290NANOSMDC200F-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PFMF.260.2 are classified into two categories based on electrical and mechanical parameter alignment:

Direct Equivalent (MF-MSMF260-2): This Bourns Inc. part maintains identical electrical specifications across all critical parameters: 6V maximum voltage, 2.6A hold current, 5.2A trip current, 15 mOhms initial resistance, and 80 mOhms post-trip resistance. The package format, dimensions, and thermal operating range are identical. This part qualifies as a direct substitute with no functional or performance trade-offs.

Similar Substitute (NANOSMDC200F-2): This Littelfuse Inc. part shares the same voltage rating (6V) and operating temperature range (-40°C ~ 85°C) but differs in hold current (2A vs. 2.6A), trip current (4A vs. 5.2A), and package format (1206 vs. 1812). The initial resistance specification (20 mOhms vs. 15 mOhms) and post-trip resistance (72 mOhms vs. 80 mOhms) also vary. This part is suitable only for applications where the lower current ratings and smaller package footprint are acceptable design modifications.

Parameter Comparison

Engineering Selection Recommendations

MF-MSMF260-2 (Bourns Inc.) is the primary equivalent substitute for the PFMF.260.2. This part maintains complete electrical and mechanical compatibility with identical hold current, trip current, resistance specifications, and package dimensions. Both parts carry ROHS3 compliance and cURus/TUV certifications. The MF-MSMF260-2 includes AEC-Q200 automotive qualification and MSL 1 moisture sensitivity rating, providing additional reliability assurance for demanding applications. This part is suitable for direct replacement without circuit redesign.

NANOSMDC200F-2 (Littelfuse Inc.) is a similar substitute applicable only to designs where lower current protection thresholds and reduced package footprint are acceptable. The 2A hold current and 4A trip current represent a 23% reduction from the PFMF.260.2 specification. The faster trip time (1.5s vs. 5s) and different package format (1206 vs. 1812) require PCB layout modification and circuit validation. This part carries CSA, TUV, and UL certifications, meeting regulatory requirements for alternative applications. Selection of this part requires explicit design review to confirm compatibility with system protection requirements.

Frequently Asked Questions (FAQ)

Q: Can MF-MSMF260-2 be used as a direct replacement for PFMF.260.2 without circuit modification?

A: Yes. The MF-MSMF260-2 maintains identical electrical specifications (6V, 2.6A hold current, 5.2A trip current) and package dimensions (1812 format). No circuit redesign is required for direct substitution.

Q: What are the key differences between PFMF.260.2 and NANOSMDC200F-2?

A: The NANOSMDC200F-2 differs in three critical areas: hold current (2A vs. 2.6A), trip current (4A vs. 5.2A), and package format (1206 vs. 1812). The trip time is also faster (1.5s vs. 5s). These differences require design validation before use.

Q: Is the NANOSMDC200F-2 suitable for applications requiring 2.6A hold current protection?

A: No. The NANOSMDC200F-2 is rated for 2A hold current maximum, which is insufficient for applications designed around the 2.6A specification of the PFMF.260.2. This part is suitable only for applications with lower current protection requirements.

Q: What packaging formats are available for these parts?

A: The PFMF.260.2 and MF-MSMF260-2 are supplied in 1812 (4532 Metric) surface mount package. The NANOSMDC200F-2 uses a smaller 1206 (3216 Metric) package, requiring PCB layout modification.

Q: Are all three parts RoHS3 compliant?

A: Yes. The PFMF.260.2, MF-MSMF260-2, and NANOSMDC200F-2 are all ROHS3 compliant. All parts are REACH unaffected and classified as EAR99 for export control purposes.

Q: What certifications apply to each part?

A: PFMF.260.2 and MF-MSMF260-2 carry cURus and TUV approvals. The NANOSMDC200F-2 carries CSA, TUV, and UL certifications. The MF-MSMF260-2 includes additional AEC-Q200 automotive qualification.

Q: What is the moisture sensitivity level (MSL) for each part?

A: The PFMF.260.2 has MSL not applicable. The MF-MSMF260-2 is MSL 1 (unlimited shelf life). The NANOSMDC200F-2 is MSL 2A (4 weeks maximum shelf life at 30°C/60% RH).