UB3C-3RF8 Equivalent & Substitute Parts

Part Overview

The UB3C-3RF8 is a 3 Ohm ±1% 3W axial wirewound resistor manufactured by Riedon in the UB series. This through-hole component is designed for current sensing applications and features flame proof, moisture resistant, pulse withstanding, and safety certifications. The part is active and in stock with 1009 units available. Equivalent and substitute parts are identified when electrical specifications, mechanical form factor, and compliance requirements align with the original component.

Substiute Parts

UB3C-3RF8

RiedonIn Stock: 1020UB3C-3RF8 Datasheet

Current PartRFQ

43F3R0E

OhmiteIn Stock: 124943F3R0E Datasheet

MFR RecommendedRFQ

ALSR033R000FE12

Vishay DaleIn Stock: 857ALSR033R000FE12 Datasheet

MFR RecommendedRFQ

RS02B3R000FE70

Vishay DaleIn Stock: 2745RS02B3R000FE70 Datasheet

MFR RecommendedRFQ

WW3FT3R00

Stackpole Electronics IncIn Stock: 2747WW3FT3R00 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UB3C-3RF8 are qualified based on the following criteria:

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

All identified substitutes meet these core electrical and mechanical parameters. Physical dimensions vary within acceptable tolerances for axial package form factors. Operating temperature ranges may extend beyond the original specification while maintaining minimum requirements.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain ROHS3 compliance or equivalent RoHS certification status. The UB3C-3RF8, ALSR033R000FE12, RS02B3R000FE70, and WW3FT3R00 are ROHS3 compliant. The 43F3R0E is RoHS compliant. All parts carry ECCN EAR99 classification and HTSUS code 8533.21.0080 where specified.

Selection between substitutes depends on physical space constraints and thermal operating requirements. The WW3FT3R00 offers the widest operating temperature range (-55°C ~ 350°C). The ALSR033R000FE12 and RS02B3R000FE70 extend the lower temperature limit to -65°C. The 43F3R0E provides the highest upper temperature rating at 275°C. Physical dimensions vary; verify PCB layout compatibility before selection.

Frequently Asked Questions (FAQ)

Q: Can WW3FT3R00 replace UB3C-3RF8 in all applications? A: Yes, provided physical dimensions fit the PCB layout. Both parts share identical electrical specifications: 3 Ohms ±1%, 3W, ±50ppm/°C temperature coefficient, and ROHS3 compliance. WW3FT3R00 offers extended upper temperature capability to 350°C.

Q: What is the difference between ALSR033R000FE12 and RS02B3R000FE70? A: Both are Vishay Dale axial wirewound resistors with identical electrical ratings. RS02B3R000FE70 is slightly larger (0.187" Dia x 0.560" L vs 0.180" Dia x 0.500" L) and is supplied in Cut Tape packaging. ALSR033R000FE12 is supplied in Bulk packaging. Both extend operating temperature to -65°C minimum.

Q: Are all substitutes moisture resistant? A: The UB3C-3RF8 specifies moisture resistant as a feature. ALSR033R000FE12, RS02B3R000FE70, and WW3FT3R00 explicitly list moisture resistant features. The 43F3R0E does not specify this feature in the provided data.

Q: What packaging formats are available? A: UB3C-3RF8 is supplied in Tape & Reel (TR). Substitutes are available in Bulk (43F3R0E, ALSR033R000FE12) or Cut Tape (RS02B3R000FE70, WW3FT3R00) formats.

Q: Do all parts meet the same compliance standards? A: All parts are ROHS3 or RoHS compliant and carry ECCN EAR99 classification. REACH status varies: UB3C-3RF8 and RS02B3R000FE70 are REACH Unaffected; ALSR033R000FE12 and 43F3R0E show Vendor Undefined; WW3FT3R00 is REACH Unaffected.