UB3C-3R3F8 Equivalent & Substitute Parts

Part Overview

The UB3C-3R3F8 is a 3.3 Ohm ±1% 3W through-hole axial wirewound resistor manufactured by Riedon. This component is designed for current sensing applications and features flame proof, moisture resistant, pulse withstanding, and safety certifications. The part is currently active in production with 713 units in stock. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers.

Substiute Parts

UB3C-3R3F8

RiedonIn Stock: 768UB3C-3R3F8 Datasheet

Current PartRFQ

RS02B3R300FE70

Vishay DaleIn Stock: 2313RS02B3R300FE70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UB3C-3R3F8 is determined by the following criteria:

Resistance value and tolerance must match exactly at 3.3 Ohms ±1%. Power rating must be equal to or greater than 3W. Composition must be wirewound to maintain thermal and electrical characteristics. Package type must be axial to ensure mechanical fit in through-hole applications. Temperature coefficient must be ±50ppm/°C or better. Operating temperature range must encompass or exceed the original specification. RoHS3 compliance and REACH unaffected status must be maintained. Regulatory certifications including ECCN EAR99 and HTSUS 8533.21.0080 classification must align.

The RS02B3R300FE70 from Vishay Dale meets all substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

The RS02B3R300FE70 is a direct substitute for the UB3C-3R3F8 based on matching electrical specifications, identical power rating, and equivalent regulatory compliance. Both parts are active products with ROHS3 compliance and REACH unaffected status. The Vishay Dale substitute provides an extended lower operating temperature limit of -65°C compared to -55°C on the original part, which represents an operational advantage. Both components maintain identical resistance, tolerance, temperature coefficient, and package configuration. Selection between these parts may be based on availability, lead time, or supply chain requirements, as electrical and mechanical compatibility is fully established.

Frequently Asked Questions (FAQ)

Q: Can the RS02B3R300FE70 be used as a direct replacement for the UB3C-3R3F8?

A: Yes. Both parts share identical resistance (3.3 Ohms), tolerance (±1%), power rating (3W), composition (wirewound), package type (axial), and temperature coefficient (±50ppm/°C). Regulatory compliance is equivalent across RoHS3 and REACH classifications.

Q: Are there physical dimension differences between these parts?

A: Yes. The UB3C-3R3F8 measures 0.157" Dia x 0.350" L (4.00mm x 8.90mm). The RS02B3R300FE70 measures 0.187" Dia x 0.560" L (4.75mm x 14.22mm). Physical layout verification is required for space-constrained applications.

Q: What is the difference in operating temperature range?

A: The UB3C-3R3F8 operates from -55°C to 250°C. The RS02B3R300FE70 operates from -65°C to 250°C. The substitute part extends the lower temperature limit by 10°C.

Q: Do packaging formats differ between these parts?

A: Yes. The UB3C-3R3F8 is supplied in Tape & Reel (TR) format. The RS02B3R300FE70 is supplied in Cut Tape (CT) format. Packaging selection depends on assembly process requirements and order quantities.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the UB3C-3R3F8 and RS02B3R300FE70 are ROHS3 compliant and REACH unaffected. Both are classified under ECCN EAR99 and HTSUS 8533.21.0080.