FEMTOSMDC010F/15-2 Equivalent & Substitute Parts

Part Overview

The FEMTOSMDC010F/15-2 is a polymeric PTC resettable fuse manufactured by Littelfuse Inc. in the PolySwitch® femtoSMDC series. This surface mount component is rated for 15V maximum voltage with a 100 mA hold current and is housed in a 0603 (1608 Metric) package with concave termination. The part is active in production and ROHS3 compliant. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when supply chain optimization is required.

Substiute Parts

FEMTOSMDC010F/15-2

Littelfuse Inc.In Stock: 4197FEMTOSMDC010F/15-2 Datasheet

Current PartRFQ

MF-FSMF010X-2

Bourns Inc.In Stock: 8397MF-FSMF010X-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FEMTOSMDC010F/15-2 is determined by the following critical parameters:

• Maximum voltage rating of 15V
• Hold current (Ih) of 100 mA maximum
• Trip current (It) of 300 mA
• Surface mount 0603 (1608 Metric) package with concave termination
• Polymeric PTC resettable fuse type
• ROHS3 compliance
• MSL rating of 1 (Unlimited)

The MF-FSMF010X-2 from Bourns Inc. meets all these core electrical and mechanical requirements, making it a direct substitute for the FEMTOSMDC010F/15-2 in applications requiring polymeric PTC resettable fuse protection at 15V and 100 mA hold current ratings.

Parameter Comparison

Engineering Selection Recommendations

Both the FEMTOSMDC010F/15-2 and MF-FSMF010X-2 are active production components with ROHS3 compliance and MSL 1 ratings. The FEMTOSMDC010F/15-2 carries UL approval, while the MF-FSMF010X-2 carries cURus and TUV approvals. Selection between these parts should be based on the specific regulatory requirements of the application and the approval agencies required by the end-use certification standard. Both components are suitable for 15V, 100 mA hold current applications in 0603 surface mount configurations.

Frequently Asked Questions (FAQ)

Q: Can the MF-FSMF010X-2 be used as a direct replacement for the FEMTOSMDC010F/15-2?

A: Yes. Both components share identical electrical ratings (15V maximum voltage, 100 mA hold current, 300 mA trip current) and are housed in the same 0603 (1608 Metric) concave surface mount package. Both are polymeric PTC resettable fuses with ROHS3 compliance and MSL 1 ratings.

Q: What are the differences between these two parts?

A: The primary differences are in initial resistance (2 Ohms vs. 900 mOhms), post-trip resistance (14 Ohms vs. 6 Ohms), time to trip (100 ms vs. 1 s), physical dimensions (slight variations within 0603 package tolerance), and approval agencies (UL vs. cURus/TUV).

Q: Are there any package compatibility concerns?

A: Both parts use the 0603 (1608 Metric) concave package. Dimensional variations are minimal and within standard PCB footprint tolerances. The MF-FSMF010X-2 is slightly thinner (0.026" vs. 0.033" maximum thickness), which presents no compatibility issues for standard surface mount assembly.

Q: Which approval agency certification should I select?

A: Selection depends on your application's regulatory requirements. The FEMTOSMDC010F/15-2 carries UL approval, while the MF-FSMF010X-2 carries cURus and TUV approvals. Verify which certifications are required by your end-use standard or regional regulations.

Q: Do these parts have the same moisture sensitivity requirements?

A: Yes. Both components are rated MSL 1 (Unlimited), indicating no moisture sensitivity limitations for storage or handling.