UB3C-2R2F1 Equivalent & Substitute Parts

Part Overview

The UB3C-2R2F1 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 in product status with 1185 pieces currently in stock. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to supply constraints, inventory availability, or design flexibility within the same performance envelope.

Substiute Parts

UB3C-2R2F1

RiedonIn Stock: 1203UB3C-2R2F1 Datasheet

Current PartRFQ

43F2R2E

OhmiteIn Stock: 145443F2R2E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The 43F2R2E (Ohmite Ohmicone® 40 series) qualifies as a direct substitute for the UB3C-2R2F1 based on the following critical parameters:

• Resistance value: 2.2 Ohms (identical)
• Tolerance: ±1% (identical)
• Power rating: 3W (identical)
• Composition: Wirewound (identical)
• Package: Axial (identical)
• Temperature coefficient: ±50ppm/°C (identical)
• RoHS compliance: ROHS3 Compliant (identical)
• Termination count: 2 (identical)

Both parts meet the electrical and mechanical requirements for interchangeable use in applications requiring a 2.2 Ohm ±1% 3W axial wirewound resistor.

Parameter Comparison

Engineering Selection Recommendations

Both the UB3C-2R2F1 and 43F2R2E meet identical electrical specifications and regulatory requirements. Selection between these parts should be based on:

• Physical space constraints: The UB3C-2R2F1 has a smaller diameter (0.157" vs 0.220") and shorter length (0.350" vs 0.594"), making it suitable for compact layouts.
• Inventory availability: The 43F2R2E currently has 1363 pieces in stock compared to 1185 pieces for the UB3C-2R2F1.
• Supply chain considerations: Both parts carry Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can the 43F2R2E replace the UB3C-2R2F1 in my circuit?

A: Yes. Both parts have identical electrical specifications (2.2 Ohms ±1%, 3W, ±50ppm/°C) and are wirewound axial resistors. The primary difference is physical size. Verify that the larger dimensions of the 43F2R2E (0.220" Dia x 0.594" L) fit within your PCB layout constraints.

Q: What is the difference in physical size between these parts?

A: The UB3C-2R2F1 measures 0.157" diameter by 0.350" length. The 43F2R2E measures 0.220" diameter by 0.594" length. The Ohmite part is larger in both dimensions.

Q: Are both parts RoHS compliant?

A: Yes. Both the UB3C-2R2F1 and 43F2R2E are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory standards.

Q: What applications are these resistors designed for?

A: The UB3C-2R2F1 is specified for current sensing applications with flame-proof, moisture-resistant, and pulse-withstanding characteristics. The 43F2R2E is a general-purpose wirewound resistor suitable for similar applications requiring 3W power dissipation at 2.2 Ohms.

Q: Can I use these parts interchangeably on the same PCB?

A: Electrically, yes. Mechanically, you must confirm that the larger footprint of the 43F2R2E does not conflict with your board layout, component spacing, or thermal management requirements.