UB5C-3R9F8 Equivalent & Substitute Parts

Part Overview

The UB5C-3R9F8 is a 3.9 Ohm ±1% 5W axial wirewound resistor manufactured by Riedon. This component is designed for through-hole applications requiring current sensing with enhanced reliability features including flame proof, moisture resistant, pulse withstanding, and safety certifications. The part maintains Active product status with 1076 units in current inventory. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers.

Substiute Parts

UB5C-3R9F8

RiedonIn Stock: 1105UB5C-3R9F8 Datasheet

Current PartRFQ

RS0053R900FE73

Vishay DaleIn Stock: 1361RS0053R900FE73 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UB5C-3R9F8 is determined by strict equivalence across the following parameters:

• Resistance value: 3.9 Ohms
• Tolerance: ±1%
• Power rating: 5W
• Composition: Wirewound
• Package configuration: Axial through-hole
• Temperature coefficient: ±50ppm/°C
• RoHS3 compliance
• REACH unaffected status

The RS0053R900FE73 from Vishay Dale meets all electrical and mechanical substitution criteria. Both parts share identical resistance, tolerance, power rating, composition, and temperature coefficient specifications. Both maintain ROHS3 compliance and REACH unaffected status. Axial package compatibility is confirmed for both components.

Parameter Comparison

Engineering Selection Recommendations

Both the UB5C-3R9F8 and RS0053R900FE73 are Active status components with full ROHS3 compliance and REACH unaffected certification. Selection between these parts should account for physical space constraints, as the RS0053R900FE73 has larger physical dimensions (0.312" diameter x 0.875" length versus 0.250" diameter x 0.500" length). The RS0053R900FE73 provides a lower minimum operating temperature of -65°C compared to -55°C for the UB5C-3R9F8, offering extended cold temperature performance when required. Both components maintain identical electrical specifications and regulatory compliance status.

Frequently Asked Questions (FAQ)

Q: Can RS0053R900FE73 directly replace UB5C-3R9F8 in all applications?

A: Electrical substitution is valid based on matching resistance, tolerance, power rating, temperature coefficient, and composition. Physical space availability must be confirmed, as the RS0053R900FE73 is larger in diameter and length.

Q: What are the critical parameters for substitution?

A: Resistance (3.9 Ohms), tolerance (±1%), power rating (5W), wirewound composition, temperature coefficient (±50ppm/°C), and axial package type are the determining factors for equivalence.

Q: Are there differences in operating temperature ranges?

A: The RS0053R900FE73 operates from -65°C to 250°C, while the UB5C-3R9F8 operates from -55°C to 250°C. The Vishay Dale part provides lower temperature capability.

Q: Do both parts meet the same regulatory requirements?

A: Both parts are ROHS3 compliant and REACH unaffected, meeting equivalent regulatory standards.

Q: What packaging formats are available?

A: The UB5C-3R9F8 is supplied in Tape & Reel (TR) format. The RS0053R900FE73 is supplied in Cut Tape (CT) format. Both are axial through-hole components.