UB5C-3RF8 Equivalent & Substitute Parts

Part Overview

The UB5C-3RF8 is a 3 Ohm, ±1% tolerance, 5W axial wirewound resistor manufactured by Riedon. This component is designed for current sense applications and features flame proof, moisture resistant, pulse withstanding, and safety certifications. The part is currently active in production with 920 pieces in stock. Substitute parts may be required due to inventory constraints, lead time considerations, or specific packaging requirements for manufacturing processes.

Substiute Parts

UB5C-3RF8

RiedonIn Stock: 932UB5C-3RF8 Datasheet

Current PartRFQ

ALSR053R000FE12

Vishay DaleIn Stock: 7215ALSR053R000FE12 Datasheet

MFR RecommendedRFQ

ALSR054R000FE12

Vishay DaleIn Stock: 1276ALSR054R000FE12 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UB5C-3RF8 is determined by the following critical parameters:

Primary Substitution Criteria:

• Resistance value: 3 Ohms
• Tolerance: ±1%
• Power rating: 5W
• Composition: Wirewound
• Package type: Axial
• Temperature coefficient: ±50ppm/°C
• RoHS compliance: ROHS3 Compliant
• Moisture sensitivity level: 1 (Unlimited)

The substitute part ALSR053R000FE12 (Vishay Dale) meets all primary criteria with identical electrical specifications and compliance certifications. This part is a direct functional equivalent suitable for applications requiring the same performance characteristics.

The substitute part ALSR054R000FE12 (Vishay Dale) differs in resistance value (4 Ohms instead of 3 Ohms) and is not a direct substitute for the UB5C-3RF8. This part is listed in the provided substitute list but does not meet the primary substitution criteria due to the resistance mismatch.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitute (Recommended): ALSR053R000FE12 (Vishay Dale) is the appropriate substitute for UB5C-3RF8. Both parts share identical electrical specifications, tolerance, power rating, and compliance certifications. The ALSR053R000FE12 offers extended lower operating temperature range (-65°C vs -55°C) and significantly higher inventory availability (7156 pieces). Both parts are ROHS3 compliant and carry MSL 1 rating.

Non-Equivalent Part: ALSR054R000FE12 (Vishay Dale) is not suitable as a substitute due to the 4 Ohm resistance value, which does not match the required 3 Ohm specification. This part cannot be used in applications designed for the UB5C-3RF8 without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can ALSR053R000FE12 be used as a direct replacement for UB5C-3RF8? A: Yes. Both parts have identical resistance (3 Ohms), tolerance (±1%), power rating (5W), temperature coefficient (±50ppm/°C), and compliance certifications (ROHS3, MSL 1). The ALSR053R000FE12 operates across a wider temperature range (-65°C to 250°C vs -55°C to 250°C).

Q: Why is ALSR054R000FE12 listed as a substitute if it has a different resistance value? A: ALSR054R000FE12 has a 4 Ohm resistance value and is not a functional equivalent to the UB5C-3RF8 (3 Ohms). This part does not meet substitution criteria and should not be selected for applications requiring 3 Ohm resistors.

Q: Are there physical dimension differences between UB5C-3RF8 and ALSR053R000FE12? A: Yes. UB5C-3RF8 measures 0.250" diameter × 0.500" length (6.40mm × 12.70mm). ALSR053R000FE12 measures 0.312" diameter × 0.875" length (7.92mm × 22.23mm). Physical layout considerations may apply in space-constrained applications.

Q: Do both parts meet the same compliance standards? A: Both UB5C-3RF8 and ALSR053R000FE12 are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Both carry EAR99 ECCN classification and 8533.21.0080 HTSUS code.

Q: What is the packaging difference between these parts? A: UB5C-3RF8 is supplied in Tape & Reel (TR) packaging. ALSR053R000FE12 is supplied in Bulk packaging. Manufacturing processes requiring specific packaging formats should account for this difference.