PFNF.050.2 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The PFNF.050.2 is a polymeric PTC resettable fuse manufactured by SCHURTER Inc., rated at 13.2V with a 500 mA hold current. This surface mount component in 1206 (3216 Metric) package format is designed for overcurrent protection in electronic circuits. The part maintains active product status with 2658 units in current inventory. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and design optimization across compatible electrical and mechanical specifications.

Substiute Parts

PFNF.050.2

SCHURTER Inc.In Stock: 2734PFNF.050.2 Datasheet

Current PartRFQ

PTS120615V050

Eaton - Electronics DivisionIn Stock: 12532PTS120615V050 Datasheet

DirectRFQ

MF-NSMF050-2

Bourns Inc.In Stock: 65738MF-NSMF050-2 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PFNF.050.2 are classified into two categories based on electrical and mechanical compatibility:

Direct Manufacturer Equivalent (PTS120615V050 - Eaton): This substitute maintains identical current hold (500 mA), trip current (1 A), maximum current (100 A), time to trip (100 ms), and resistance specifications. The voltage rating is elevated to 15V, which is compatible with 13.2V applications as higher voltage ratings provide backward compatibility. The package format, mounting type, and thermal operating range remain identical. Approval agencies and RoHS compliance are maintained.

Parametric Equivalent (MF-NSMF050-2 - Bourns Inc.): This substitute provides exact electrical parameter matching across voltage (13.2V), current hold (500 mA), trip current (1 A), maximum current (100 A), time to trip (100 ms), and resistance specifications. Physical dimensions, package format, and mounting type are identical. This part includes AEC-Q200 automotive qualification in addition to cURus and TUV approvals. RoHS3 compliance is maintained.

Substitution logic is based on matching the following critical parameters: maximum voltage rating (equal or higher), hold current (500 mA), trip current (1 A), package format (1206 Concave), mounting type (Surface Mount), and regulatory compliance (cURus, TUV, RoHS3).

Parameter Comparison

Engineering Selection Recommendations

MF-NSMF050-2 (Bourns Inc.) is the preferred parametric equivalent for direct replacement. This part matches all electrical specifications exactly and maintains identical physical dimensions (0.126" L x 0.063" W, 0.033" max thickness). The inclusion of AEC-Q200 automotive qualification provides additional reliability assurance for applications requiring automotive-grade components. All regulatory certifications (cURus, TUV, RoHS3) are maintained. Packaging is available in Cut Tape and Digi-Reel formats with 65630 units in inventory.

PTS120615V050 (Eaton - Electronics Division) serves as an alternative substitute where voltage headroom is beneficial. The 15V rating provides compatibility with 13.2V circuits while offering enhanced overvoltage margin. All electrical performance parameters remain identical. Physical dimensions show minor variation (0.128" L x 0.065" W, 0.042" max thickness), which may require PCB layout verification for space-constrained applications. This part is available in Tape & Reel packaging with 12513 units in inventory.

All three parts maintain active product status, full regulatory compliance, and identical thermal operating ranges (-40°C ~ 85°C).

Frequently Asked Questions (FAQ)

Q: Can PTS120615V050 replace PFNF.050.2 in a 13.2V circuit? A: Yes. The PTS120615V050 has a 15V maximum rating, which is compatible with 13.2V applications. Higher voltage ratings provide backward compatibility. All electrical performance parameters (hold current, trip current, response time, resistance) are identical.

Q: What is the difference between MF-NSMF050-2 and PFNF.050.2? A: Both parts have identical electrical specifications and physical dimensions. The primary difference is manufacturer (Bourns vs. SCHURTER) and the inclusion of AEC-Q200 automotive qualification on the Bourns part. Packaging format differs (Cut Tape & Digi-Reel vs. Tape & Reel).

Q: Are there physical dimension differences that affect PCB placement? A: MF-NSMF050-2 and PFNF.050.2 have identical dimensions (0.126" L x 0.063" W, 0.033" max thickness). PTS120615V050 has slightly larger dimensions (0.128" L x 0.065" W, 0.042" max thickness). PCB layouts designed for the SCHURTER part will accommodate the Bourns equivalent without modification. The Eaton part may require layout verification in space-constrained designs.

Q: Do all substitute parts meet the same regulatory requirements? A: Yes. All three parts are cURus and TUV approved, ROHS3 compliant, and REACH unaffected. The MF-NSMF050-2 includes additional AEC-Q200 automotive qualification.

Q: What is the difference in packaging availability? A: PFNF.050.2 is supplied in Tape & Reel (TR) format. MF-NSMF050-2 is available in Cut Tape (CT) and Digi-Reel formats. PTS120615V050 is supplied in Tape & Reel format. Packaging selection depends on assembly process requirements and volume needs.

Q: Can these parts be used interchangeably in production? A: MF-NSMF050-2 and PFNF.050.2 are direct parametric equivalents and can be used interchangeably without circuit modification. PTS120615V050 can be used as a substitute with the understanding that the higher voltage rating provides additional overvoltage protection margin. All parts maintain identical thermal and electrical performance characteristics within their rated specifications.