UB3C-30RF8 Equivalent & Substitute Parts

Part Overview

The Riedon UB3C-30RF8 is a 30 Ohm ±1% 3W axial wirewound resistor designed for current sensing applications. This component features flame-proof and moisture-resistant construction with pulse-withstanding capability, operating across -55°C to 250°C. The part is Active status and ROHS3 compliant. Substitute parts are identified when inventory constraints, packaging requirements, or operational temperature range extensions are necessary while maintaining core electrical and mechanical specifications.

Substiute Parts

UB3C-30RF8

RiedonIn Stock: 689UB3C-30RF8 Datasheet

Current PartRFQ

43F30RE

OhmiteIn Stock: 109143F30RE Datasheet

MFR RecommendedRFQ

RS02B30R00FE70

Vishay DaleIn Stock: 5335RS02B30R00FE70 Datasheet

MFR RecommendedRFQ

WW3FT30R0

Stackpole Electronics IncIn Stock: 11405WW3FT30R0 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following core parameters: resistance value (30 Ohms), tolerance (±1%), power rating (3W), composition (wirewound), package type (axial), temperature coefficient (±20ppm/°C), and compliance certifications (ROHS3, REACH Unaffected, EAR99). All identified substitute parts meet these criteria. Operating temperature range extensions and physical dimension variations are permitted within the axial package classification. Packaging format (Tape & Reel, Bulk, Cut Tape) does not affect electrical substitutability.

Parameter Comparison

Engineering Selection Recommendations

All four parts maintain Active product status and full compliance with ROHS3 and REACH requirements. Selection between the UB3C-30RF8 and substitute parts should be based on:

Inventory availability: WW3FT30R0 (Stackpole) offers the highest stock level at 11,390 pieces, followed by RS02B30R00FE70 (Vishay Dale) at 5,309 pieces.

Physical dimensions: The UB3C-30RF8 features the most compact axial form factor (4.00mm diameter x 8.90mm length). Substitute parts are larger, with 43F30RE measuring 5.60mm x 15.10mm and both RS02B30R00FE70 and WW3FT30R0 measuring 4.75mm x 14.22mm. PCB layout constraints may necessitate dimensional consideration.

Operating temperature range: WW3FT30R0 extends the upper temperature limit to 350°C, compared to 250°C for the primary part. RS02B30R00FE70 extends the lower limit to -65°C. Selection depends on application thermal requirements.

Packaging format: UB3C-30RF8 is supplied in Tape & Reel format. Substitute parts are available in Bulk (43F30RE) or Cut Tape (RS02B30R00FE70, WW3FT30R0) formats.

Frequently Asked Questions (FAQ)

Q: Can these substitute parts be used interchangeably with the UB3C-30RF8?

A: Yes, all identified substitute parts share identical electrical specifications: 30 Ohms ±1% resistance, 3W power rating, ±20ppm/°C temperature coefficient, and wirewound axial construction. All are ROHS3 compliant and REACH unaffected. Physical dimensions vary, requiring verification of PCB layout compatibility.

Q: What are the key differences between substitute options?

A: Primary differences are physical dimensions, operating temperature ranges, and packaging formats. The UB3C-30RF8 is the most compact. WW3FT30R0 offers the widest operating temperature range (-55°C to 350°C). RS02B30R00FE70 extends the lower temperature limit to -65°C. Packaging varies between Tape & Reel, Bulk, and Cut Tape formats.

Q: Are there any feature differences I should consider?

A: The UB3C-30RF8 specifies current sense, flame-proof, moisture-resistant, pulse-withstanding, and safety features. Substitute parts list moisture-resistant as a feature where specified. All parts meet the same compliance standards and are suitable for current sensing applications.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel, Bulk, and Cut Tape packaging formats do not affect electrical characteristics or performance. Selection should be based on assembly process requirements and inventory handling procedures.

Q: What should I verify before substitution?

A: Confirm PCB layout accommodates the substitute part's physical dimensions. Verify the operating temperature range meets application requirements. Confirm packaging format compatibility with assembly processes. All electrical and compliance specifications are equivalent across all parts listed.