UB3C-330RF8 Equivalent & Substitute Parts

Part Overview

The UB3C-330RF8 is a 330 Ohm ±1% 3W axial wirewound through-hole resistor manufactured by Riedon. This component is designed for current sensing applications and features flame-proof, moisture-resistant, and pulse-withstanding characteristics. The part is currently active in production with 830 units in stock. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits alternative sourcing while maintaining electrical and mechanical compatibility.

Substiute Parts

UB3C-330RF8

RiedonIn Stock: 938UB3C-330RF8 Datasheet

Current PartRFQ

43F330E

OhmiteIn Stock: 94543F330E Datasheet

MFR RecommendedRFQ

RS02B330R0FE70

Vishay DaleIn Stock: 4914RS02B330R0FE70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UB3C-330RF8 are qualified based on the following electrical and mechanical parameters:

• Resistance value: 330 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package configuration: Axial through-hole
• Temperature coefficient: ±20ppm/°C
• Operating temperature range: minimum -55°C to maximum 250°C
• Termination count: 2 leads
• HTSUS classification: 8533.21.0080

Two substitute parts meet these criteria: RS02B330R0FE70 (Vishay Dale) and 43F330E (Ohmite). The RS02B330R0FE70 maintains full electrical and mechanical compatibility with identical specifications. The 43F330E provides electrical equivalence but differs in packaging format and compliance status.

Parameter Comparison

Engineering Selection Recommendations

The RS02B330R0FE70 (Vishay Dale) is the primary substitute for the UB3C-330RF8. This part maintains full electrical equivalence with identical resistance, tolerance, power rating, temperature coefficient, and operating temperature range. Both parts are ROHS3 compliant and REACH unaffected. The RS02B330R0FE70 extends the lower operating temperature limit to -65°C, providing additional thermal margin. Inventory availability for the RS02B330R0FE70 is 4,845 units, exceeding the UB3C-330RF8 stock level.

The 43F330E (Ohmite) provides electrical equivalence in resistance, tolerance, and power rating but differs in material composition (silicone versus wirewound) and compliance status. This part is RoHS non-compliant and does not meet ROHS3 requirements. Selection of the 43F330E requires verification of design compliance requirements and regulatory constraints.

Frequently Asked Questions (FAQ)

Q: Can RS02B330R0FE70 be used as a direct replacement for UB3C-330RF8?

A: Yes. Both parts share identical electrical specifications (330 Ohms ±1%, 3W, ±20ppm/°C) and axial wirewound construction. The RS02B330R0FE70 operates across a wider temperature range (-65°C to 250°C versus -55°C to 250°C) and maintains equivalent RoHS3 compliance and REACH status.

Q: What is the difference between the packaging formats?

A: The UB3C-330RF8 is supplied in Tape & Reel (TR) format for automated assembly. The RS02B330R0FE70 is supplied in Cut Tape (CT) format. The 43F330E is supplied in Bulk format. These packaging differences affect handling, storage, and assembly processes but do not alter electrical performance.

Q: Is the 43F330E suitable for applications requiring RoHS compliance?

A: No. The 43F330E is RoHS non-compliant and does not meet ROHS3 requirements. Applications subject to RoHS directives must use either the UB3C-330RF8 or RS02B330R0FE70.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by resistance value (330 Ohms), tolerance (±1%), power rating (3W), package type (axial), and composition (wirewound for full equivalence). Temperature coefficient and operating temperature range must meet or exceed application requirements.

Q: Are there differences in moisture resistance between these parts?

A: The UB3C-330RF8 explicitly specifies moisture-resistant construction with MSL 1 (Unlimited). The RS02B330R0FE70 specifies moisture-resistant features with MSL Not Applicable. The 43F330E does not specify moisture resistance characteristics.