UB3C-2R2F8 Equivalent & Substitute Parts

Part Overview

The UB3C-2R2F8 is a 2.2 Ohm ±1% 3W axial wirewound resistor manufactured by Riedon. This component is designed for current sensing applications and features flame proof, moisture resistant, and pulse withstanding characteristics. The part is Active status and widely used in industrial and power electronics applications requiring precision current measurement and thermal stability. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter range.

Substiute Parts

UB3C-2R2F8

RiedonIn Stock: 865UB3C-2R2F8 Datasheet

Current PartRFQ

43F2R2E

OhmiteIn Stock: 145443F2R2E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UB3C-2R2F8 is determined by strict equivalence across the following critical parameters:

• Resistance value: 2.2 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package: Axial
• Temperature coefficient: ±50ppm/°C
• RoHS compliance: ROHS3 Compliant

The substitute part 43F2R2E from Ohmite meets all these criteria. Both parts are wirewound axial resistors with identical electrical specifications and regulatory compliance. Physical dimensions differ between the two parts; however, both maintain the same electrical performance and thermal characteristics required for current sensing applications.

Parameter Comparison

Engineering Selection Recommendations

Both the UB3C-2R2F8 and 43F2R2E are Active status components with ROHS3 compliance and REACH Unaffected designation. Selection between these parts should be based on:

• PCB layout constraints: The UB3C-2R2F8 has a smaller physical footprint (4.00mm diameter x 8.90mm length) compared to the 43F2R2E (5.60mm diameter x 15.10mm length). Space-constrained applications may require the Riedon part.
• Packaging requirements: The UB3C-2R2F8 is supplied in Tape & Reel format, while the 43F2R2E is supplied in Bulk packaging. Procurement and assembly processes should align with available packaging options.
• Electrical performance is equivalent across both parts for current sensing applications within the specified operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the 43F2R2E replace the UB3C-2R2F8 in all applications?

A: Yes, provided that the larger physical dimensions of the 43F2R2E (5.60mm diameter x 15.10mm length) do not conflict with PCB layout constraints. Electrical specifications are identical.

Q: What is the primary difference between these two parts?

A: The primary differences are physical dimensions and packaging format. The UB3C-2R2F8 is smaller and supplied in Tape & Reel, while the 43F2R2E is larger and supplied in Bulk. Electrical and thermal characteristics are equivalent.

Q: Are both parts suitable for current sensing applications?

A: Yes. Both parts are wirewound axial resistors with ±1% tolerance and ±50ppm/°C temperature coefficient, meeting the precision requirements for current sensing circuits.

Q: What is the operating temperature range for these resistors?

A: The UB3C-2R2F8 operates from -55°C to 250°C. Operating temperature range for the 43F2R2E was not provided in the specification data.

Q: Are both parts RoHS compliant?

A: Yes. Both the UB3C-2R2F8 and 43F2R2E are ROHS3 Compliant and REACH Unaffected.