FPR2B-10RF1 Equivalent & Substitute Parts

Part Overview

The FPR2B-10RF1 is a 10 Ohm ±1% 15W through-hole resistor manufactured by Riedon in TO-220-2 package configuration. This metal foil current sense resistor is designed for precision applications requiring low inductance and tight tolerance specifications. The part is active in production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to inventory constraints, supply chain considerations, or application-specific performance requirements.

Substiute Parts

FPR2B-10RF1

RiedonIn Stock: 778FPR2B-10RF1 Datasheet

Current PartRFQ

MP820-10.0-1%

Caddock Electronics Inc.In Stock: 3488MP820-10.0-1% Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FPR2B-10RF1 is determined by the following critical parameters:

Electrical Equivalence Requirements:

• Resistance value: 10 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Package type: TO-220-2 (mechanical and electrical compatibility)

Performance Considerations:

• Power rating: Substitute must meet or exceed 15W minimum
• Temperature coefficient: Substitute specifications must be compatible with application thermal requirements
• Operating temperature range: Substitute must cover or exceed the -40°C to 130°C range

Compliance Requirements:

• RoHS3 compliance mandatory
• REACH unaffected status required

The MP820-10.0-1% from Caddock Electronics qualifies as a substitute based on matching resistance (10 Ohms), tolerance (±1%), and package configuration (TO-220-2), while exceeding the power rating requirement at 20W.

Parameter Comparison

Engineering Selection Recommendations

Primary Part (FPR2B-10RF1): Use when metal foil composition and non-inductive characteristics are specifically required for current sense applications. Active production status with 744 units in stock ensures availability. Full RoHS3 compliance and REACH unaffected status meet regulatory requirements.

Substitute Part (MP820-10.0-1%): The MP820-10.0-1% provides functional equivalence with enhanced performance margins. The 20W power rating provides 33% additional capacity beyond the 15W requirement. Extended operating temperature range (-55 to 175°C) accommodates broader thermal environments. Thick film composition differs from the metal foil technology of the primary part; this distinction must be evaluated against specific application requirements for current sensing accuracy and inductance performance. ROHS3 compliance and REACH unaffected status maintain regulatory alignment. Inventory availability at 3446 units supports supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the MP820-10.0-1% directly replace the FPR2B-10RF1 in all applications?

A: Electrical and mechanical compatibility is confirmed for resistance value, tolerance, and TO-220-2 package configuration. The substitute part exceeds power rating and temperature range specifications. However, the composition difference (thick film versus metal foil) may affect performance in applications where non-inductive characteristics or specific current sensing accuracy are critical design parameters. Application-specific validation is necessary.

Q: What is the significance of the different temperature coefficients?

A: The FPR2B-10RF1 specifies ±50 ppm/°C, while the MP820-10.0-1% specifies -20/+50 ppm/°C. The substitute part exhibits a tighter negative temperature coefficient, which may result in different resistance drift characteristics across the operating temperature range. This distinction is relevant for precision measurement circuits where temperature stability is a design constraint.

Q: Are both parts suitable for current sense applications?

A: The FPR2B-10RF1 is explicitly designated as a current sense resistor with non-inductive metal foil construction. The MP820-10.0-1% is specified as moisture resistant and non-inductive thick film. Both parts are suitable for current sensing; however, the metal foil composition of the primary part may provide superior performance in high-frequency or precision current measurement scenarios.

Q: What are the physical dimension differences?

A: Both parts use TO-220-2 package configuration with similar overall dimensions. The FPR2B-10RF1 measures 0.400" L x 0.157" W with 0.598" seated height. The MP820-10.0-1% measures 0.400" L x 0.175" W with 0.590" seated height. Width and height variations are minimal and typically do not affect PCB layout compatibility.

Q: Do both parts meet current regulatory compliance requirements?

A: Yes. Both the FPR2B-10RF1 and MP820-10.0-1% are ROHS3 compliant and REACH unaffected, meeting current electronic component regulatory standards for the EU and equivalent markets.