FEMTOSMDC035F-2 Equivalent & Substitute Parts

Part Overview

The FEMTOSMDC035F-2 is a Polymeric PTC Resettable Fuse manufactured by Littelfuse Inc. in the PolySwitch® femtoSMDC series. This component is rated for 6V maximum voltage with a 350 mA hold current and is packaged in a 0603 (1608 Metric) surface mount form factor with concave termination. The part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design requirements and procurement.

Substiute Parts

FEMTOSMDC035F-2

Littelfuse Inc.In Stock: 237098FEMTOSMDC035F-2 Datasheet

Current PartRFQ

PTS06036V035

Eaton - Electronics DivisionIn Stock: 6242PTS06036V035 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for PTC resettable fuses is determined by the following critical parameters:

• Voltage Rating: The substitute must meet or exceed the maximum voltage specification (6V)
• Current - Hold (Ih): The substitute must match the hold current rating (350 mA) to ensure proper circuit protection
• Package / Case: The substitute must use the same 0603 (1608 Metric) surface mount package with concave termination for PCB compatibility
• Time to Trip: The substitute must maintain the same response time (100 ms) for consistent circuit protection behavior
• Mounting Type: Surface mount configuration must be preserved

The PTS06036V035 manufactured by Eaton - Electronics Division meets these critical substitution criteria and is classified as an MFR Recommended substitute.

Parameter Comparison

Engineering Selection Recommendations

The PTS06036V035 is the designated manufacturer-recommended substitute for the FEMTOSMDC035F-2. Both components share identical voltage and hold current ratings, matching package geometry, and equivalent time-to-trip response. The substitute maintains active product status with current inventory availability, addressing the discontinuation of the original part.

Compliance certifications differ between manufacturers: the original part carries CSA and UL approvals, while the substitute holds cURus and TUV certifications. Both components meet RoHS requirements and maintain MSL 1 moisture sensitivity ratings, suitable for standard surface mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the PTS06036V035 be used as a direct replacement for the FEMTOSMDC035F-2?

A: Yes. Both components share the same 6V voltage rating, 350 mA hold current, 100 ms trip time, and 0603 (1608 Metric) concave surface mount package. The PTS06036V035 is the manufacturer-recommended substitute.

Q: What are the differences in resistance specifications between these parts?

A: The FEMTOSMDC035F-2 has a minimum initial resistance of 280 mOhms, while the PTS06036V035 has 90 mOhms. Post-trip resistance differs: 1 Ohm maximum for the original versus 1.5 Ohms for the substitute. These variations are within acceptable operating parameters for PTC resettable fuse functionality.

Q: Are the physical dimensions identical?

A: The components are functionally equivalent in package type (0603 concave) with minor dimensional variations. The FEMTOSMDC035F-2 measures 0.063" L x 0.032" W x 0.037" thick, while the PTS06036V035 measures 0.065" L x 0.035" W x 0.031" thick. Both fit standard 0603 footprints on PCBs.

Q: What certifications apply to each part?

A: The FEMTOSMDC035F-2 carries CSA and UL approvals. The PTS06036V035 carries cURus and TUV certifications. Both meet ROHS3/REACH compliance requirements.

Q: Is the PTS06036V035 currently available?

A: Yes. The PTS06036V035 is in active product status with 6133 pieces in stock, available in Tape & Reel packaging. The original FEMTOSMDC035F-2 is discontinued at DiGi Electronics.