UB5C-47RF8 Equivalent & Substitute Parts

Part Overview

The UB5C-47RF8 is a 47 Ohm, ±1% tolerance, 5W axial wirewound resistor manufactured by Riedon. This component is designed for through-hole applications requiring current sensing functionality with enhanced reliability features including flame proof, moisture resistant, pulse withstanding, and safety certifications. The part is currently in active production status with 784 units available in inventory. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers.

Substiute Parts

UB5C-47RF8

RiedonIn Stock: 888UB5C-47RF8 Datasheet

Current PartRFQ

RS00547R00FE73

Vishay DaleIn Stock: 2080RS00547R00FE73 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UB5C-47RF8 is determined by the following critical parameters:

Electrical specifications must match: 47 Ohms resistance value, ±1% tolerance, and 5W power rating are non-negotiable requirements. The temperature coefficient of ±20ppm/°C establishes the thermal stability class for this component.

Mechanical compatibility requires axial package configuration with through-hole termination (2 terminations). While physical dimensions may vary within manufacturing tolerances, the axial form factor must be preserved for circuit board layout compatibility.

Regulatory compliance must be maintained: ROHS3 compliance and REACH unaffected status are mandatory for equivalent substitution. Operating temperature range must support the specified -55°C to 250°C envelope or exceed it.

The RS00547R00FE73 from Vishay Dale qualifies as a direct substitute based on matching electrical specifications (47 Ohms, ±1%, 5W, ±20ppm/°C), identical package type (axial), and equivalent regulatory certifications (ROHS3 compliant, REACH unaffected).

Parameter Comparison

Engineering Selection Recommendations

Both the UB5C-47RF8 and RS00547R00FE73 meet the core electrical and mechanical requirements for 47 Ohm, 5W axial wirewound resistor applications. Selection between these parts should be based on:

Availability and lead time: The RS00547R00FE73 has 2023 units in stock compared to 784 units for the UB5C-47RF8, providing greater supply security for high-volume requirements.

Operating temperature margin: The RS00547R00FE73 extends the lower temperature limit to -65°C, providing an additional 10°C margin below the UB5C-47RF8 specification. Both parts support the full 250°C upper limit.

Physical dimensions: The RS00547R00FE73 measures 0.312" diameter × 0.875" length, while the UB5C-47RF8 measures 0.250" diameter × 0.500" length. Circuit board layout constraints may dictate component selection based on available mounting space.

Packaging format: The UB5C-47RF8 is supplied in Tape & Reel format; the RS00547R00FE73 is supplied in Cut Tape format. Procurement and assembly processes may have preferences for specific packaging configurations.

Both parts maintain identical regulatory compliance (ROHS3, REACH unaffected) and are suitable for direct substitution in applications requiring current sensing wirewound resistors.

Frequently Asked Questions (FAQ)

Q: Can the RS00547R00FE73 directly replace the UB5C-47RF8 in existing designs?

A: Yes. Both components share identical electrical specifications (47 Ohms, ±1%, 5W, ±20ppm/°C), axial package configuration, and regulatory compliance status. Physical dimension differences must be verified against circuit board layout constraints.

Q: What are the key differences between these substitute parts?

A: The primary differences are physical dimensions, operating temperature lower limit (-55°C vs. -65°C), and packaging format (Tape & Reel vs. Cut Tape). Electrical performance and regulatory compliance are equivalent.

Q: Are there any compatibility concerns with the different physical sizes?

A: Physical dimensions affect circuit board layout and mounting clearances. The RS00547R00FE73 is larger (0.312" × 0.875") than the UB5C-47RF8 (0.250" × 0.500"). Verify available mounting space before substitution.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the UB5C-47RF8 and RS00547R00FE73 are ROHS3 compliant and REACH unaffected, meeting identical environmental and safety standards.

Q: Which part should be selected for new designs?

A: Selection should be based on availability, lead time, physical space constraints, and packaging preferences. Both parts are functionally equivalent for the specified application.

Q: What is the significance of the ±20ppm/°C temperature coefficient?

A: This specification defines the resistor's thermal stability. Both parts maintain this identical coefficient across their operating temperature ranges, ensuring predictable resistance variation with temperature changes.