0603SFP300F/32-2 Equivalent & Substitute Parts

Part Overview

The 0603SFP300F/32-2 is a surface mount board mount fuse manufactured by Littelfuse Inc., rated for 3A at 32VDC with a 0603 (1608 Metric) package footprint. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part meets UL approval standards and ROHS3 compliance requirements, with unlimited moisture sensitivity level (MSL 1) suitable for standard PCB assembly processes.

Substiute Parts

0603SFP300F/32-2

Littelfuse Inc.In Stock: 12520603SFP300F/32-2 Datasheet

Current PartRFQ

SF-0603HI300M-2

Bourns Inc.In Stock: 6189SF-0603HI300M-2 Datasheet

MFR RecommendedRFQ

TR/0603FA3-R

Eaton - Electronics DivisionIn Stock: 5114TR/0603FA3-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0603SFP300F/32-2 are qualified based on the following critical parameters:

• Current Rating: 3 A (exact match required)
• Voltage Rating - DC: 32 V (exact match required)
• Package / Case: 0603 (1608 Metric) (exact match required for PCB compatibility)
• Mounting Type: Surface Mount (exact match required)
• Fuse Type: Board Mount (Cartridge Style Excluded) (exact match required)
• RoHS Status: ROHS3 Compliant (compliance requirement)
• Approval Agency: UL certification (safety standard requirement)

The two qualified substitutes meet these core electrical and mechanical parameters. Variations in secondary parameters such as breaking capacity, melting I²t, temperature range, and DC cold resistance are acceptable within engineering tolerances for equivalent functionality.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are qualified replacements for the obsolete 0603SFP300F/32-2 based on matching electrical specifications and package requirements.

SF-0603HI300M-2 (Bourns Inc.) is an active product with identical electrical parameters to the original part, including matching melting I²t (0.72) and breaking capacity (50A). This part offers extended operating temperature range (-55°C ~ 150°C) and is available in Tape & Reel packaging. UL approval and ROHS3 compliance are confirmed.

TR/0603FA3-R (Eaton - Electronics Division) is an active product with fast-blow response time characteristics. This part includes AC voltage rating (32V) in addition to DC rating, providing broader application flexibility. Breaking capacity is reduced to 35A with significantly lower melting I²t (0.0699), indicating faster response to overcurrent conditions. CSA and UL approvals are confirmed with ROHS3 compliance.

Selection between these substitutes depends on application-specific requirements for response time and breaking capacity. Both parts maintain identical current, voltage, and package specifications required for direct PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can SF-0603HI300M-2 be used as a direct replacement for 0603SFP300F/32-2?

A: Yes. Both parts share identical current rating (3A), DC voltage rating (32V), package footprint (0603), and mounting type (surface mount). Electrical parameters including melting I²t (0.72) and breaking capacity (50A) are identical. PCB layout and assembly processes require no modification.

Q: What is the difference between SF-0603HI300M-2 and TR/0603FA3-R?

A: The primary differences are response time and breaking capacity. TR/0603FA3-R is specified as fast-blow with lower melting I²t (0.0699 vs 0.72), resulting in faster overcurrent response. Breaking capacity is 35A versus 50A. TR/0603FA3-R includes AC voltage rating (32V) while SF-0603HI300M-2 is DC-rated. Both meet the core 3A/32VDC requirement.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. All three parts use the 0603 (1608 Metric) package with surface mount configuration. Physical dimensions are equivalent within standard manufacturing tolerances, ensuring PCB layout compatibility without redesign.

Q: What certifications apply to the substitute parts?

A: SF-0603HI300M-2 carries UL approval and ROHS3 compliance. TR/0603FA3-R carries CSA and UL approvals with ROHS3 compliance. Both meet the safety and environmental standards of the original part.

Q: Can TR/0603FA3-R be used in applications requiring DC operation only?

A: Yes. TR/0603FA3-R is rated for 32V DC and meets the DC voltage requirement. The additional AC rating does not restrict DC application. However, the fast-blow characteristic and lower breaking capacity should be evaluated against circuit protection requirements.

Q: What is the moisture sensitivity level for substitute parts?

A: Both SF-0603HI300M-2 and TR/0603FA3-R are classified as MSL 1 (Unlimited), matching the original part. Standard PCB assembly processes without special moisture control are applicable.