UB3C-4R7F8 Equivalent & Substitute Parts

Part Overview

The UB3C-4R7F8 is a 4.7 Ohm, 3W wirewound axial resistor manufactured by Riedon, designed for current sensing applications in through-hole configurations. This component is actively produced and widely used in industrial and power electronics applications requiring precision resistance with high power dissipation capability. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter range for this resistor category.

Substiute Parts

UB3C-4R7F8

RiedonIn Stock: 810UB3C-4R7F8 Datasheet

Current PartRFQ

RS02B4R700FE70

Vishay DaleIn Stock: 1426RS02B4R700FE70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UB3C-4R7F8 is determined by strict equivalence across the following critical parameters:

• Resistance value: 4.7 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package configuration: Axial through-hole
• Temperature coefficient: ±50ppm/°C
• RoHS compliance: ROHS3 Compliant

The RS02B4R700FE70 (Vishay Dale) qualifies as a direct substitute based on matching all electrical specifications and axial package requirements. Mechanical dimensions may vary within acceptable assembly tolerances for through-hole applications.

Parameter Comparison

Engineering Selection Recommendations

Both the UB3C-4R7F8 and RS02B4R700FE70 are active production components with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for industrial electronics. Selection between these parts should be based on:

• PCB layout constraints: The UB3C-4R7F8 has a more compact axial profile (0.157" diameter, 0.350" length) compared to the RS02B4R700FE70 (0.187" diameter, 0.560" length).
• Operating temperature requirements: The RS02B4R700FE70 extends the lower temperature limit to -65°C, providing broader environmental coverage if required.
• Supply chain availability: Both parts maintain active inventory status with established suppliers.

Frequently Asked Questions (FAQ)

Q: Can the RS02B4R700FE70 be used as a direct replacement for the UB3C-4R7F8 in current sensing applications?

A: Yes. Both components share identical electrical specifications (4.7 Ohms, ±1%, 3W, ±50ppm/°C) and wirewound axial construction. The primary consideration is physical space on the PCB, as the Vishay Dale part has larger dimensions.

Q: What is the significance of the different operating temperature ranges?

A: The UB3C-4R7F8 operates from -55°C to 250°C, while the RS02B4R700FE70 extends to -65°C at the lower end. For applications within the -55°C to 250°C window, both parts perform identically. The RS02B4R700FE70 is suitable for applications requiring extended low-temperature operation.

Q: Are there packaging differences between these parts?

A: The UB3C-4R7F8 is supplied in Tape & Reel (TR) packaging, while the RS02B4R700FE70 is supplied in Cut Tape (CT) packaging. Both are standard through-hole component formats. Packaging selection depends on assembly process requirements and volume considerations.

Q: Do both parts meet current regulatory compliance standards?

A: Yes. Both the UB3C-4R7F8 and RS02B4R700FE70 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for industrial electronics manufacturing.

Q: What are the key parameters that must remain constant for substitution?

A: Resistance value (4.7 Ohms), tolerance (±1%), power rating (3W), temperature coefficient (±50ppm/°C), and axial package configuration are the critical parameters that define substitution eligibility for this resistor category.