FPS2B-25RF1 Equivalent & Substitute Parts

Part Overview

The FPS2B-25RF1 is a 25 Ohm ±1% 1.5W chip resistor manufactured by Riedon, designed for current sensing applications in TO-263-3 D2PAK packaging. This metal foil, non-inductive component operates across -40°C to 130°C and is ROHS3 compliant with unlimited moisture sensitivity rating. The part is currently active in production with 661 units in stock. Substitute parts are identified when inventory constraints, extended operating temperature requirements, or higher power dissipation needs arise within the same electrical and mechanical specifications.

Substiute Parts

FPS2B-25RF1

RiedonIn Stock: 674FPS2B-25RF1 Datasheet

Current PartRFQ

NPS2T-25RF1

RiedonIn Stock: 3364NPS2T-25RF1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FPS2B-25RF1 is determined by the following critical parameters:

• Resistance value: 25 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab) (exact match required)
• Number of Terminations: 2 (exact match required)
• Current sensing capability (required feature)
• RoHS3 compliance (required certification)
• Moisture Sensitivity Level: 1 (required rating)

The NPS2T-25RF1 qualifies as a manufacturer-recommended substitute despite differences in composition, power rating, temperature coefficient, and maximum operating temperature. These variations remain within acceptable substitution parameters for the FPS2B-25RF1 application category.

Parameter Comparison

Engineering Selection Recommendations

Selection between FPS2B-25RF1 and NPS2T-25RF1 is based on application requirements and compliance status:

The FPS2B-25RF1 is the primary selection for applications requiring metal foil composition with ±50ppm/°C temperature coefficient stability and operation within -40°C to 130°C range.

The NPS2T-25RF1 is selected when higher power dissipation capacity (25W versus 1.5W) is required, extended operating temperature range to 175°C is necessary, or when higher inventory availability is a procurement factor. Both parts maintain ROHS3 compliance, unlimited moisture sensitivity rating, and identical electrical resistance and tolerance specifications.

Frequently Asked Questions (FAQ)

Q: Can NPS2T-25RF1 replace FPS2B-25RF1 in all applications?

A: Substitution is valid when the application does not require the specific metal foil composition or ±50ppm/°C temperature coefficient of the FPS2B-25RF1. The NPS2T-25RF1 thick film construction and ±100ppm/°C coefficient may affect circuit performance in precision current sensing applications with tight temperature stability requirements.

Q: What is the physical difference between these parts?

A: Both parts use TO-263-3 D2PAK packaging with identical height (0.161" maximum seated). The FPS2B-25RF1 measures 0.500" L x 0.400" W (12.70mm x 10.16mm), while the NPS2T-25RF1 measures 0.325" L x 0.320" W (8.26mm x 8.13mm). PCB layout and thermal management considerations may differ due to size variation.

Q: Are both parts RoHS compliant?

A: Yes. Both FPS2B-25RF1 and NPS2T-25RF1 are ROHS3 compliant with REACH affected status and EAR99 ECCN classification.

Q: What determines substitution eligibility?

A: Substitution requires exact matching of resistance value (25 Ohms), tolerance (±1%), package type (TO-263-3 D2PAK), termination count (2), current sensing capability, and compliance certifications (ROHS3, MSL 1). Differences in composition, power rating, and temperature coefficient do not prevent substitution when application requirements permit.

Q: Which part should be selected for high-temperature applications?

A: The NPS2T-25RF1 supports operating temperatures to 175°C, compared to 130°C maximum for the FPS2B-25RF1. Selection depends on whether the extended temperature range is required by the application specification.