UB3C-270RF8 Equivalent & Substitute Parts

Part Overview

The UB3C-270RF8 is a 270 Ohms ±1% 3W axial wirewound resistor manufactured by Riedon. This through-hole component is designed for current sense applications and features flame-proof, moisture-resistant, and pulse-withstanding characteristics. The part is currently active in production and maintains ROHS3 compliance. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required for design flexibility, inventory management, or supply chain continuity.

Substiute Parts

UB3C-270RF8

RiedonIn Stock: 783UB3C-270RF8 Datasheet

Current PartRFQ

RS02B270R0FE70

Vishay DaleIn Stock: 1628RS02B270R0FE70 Datasheet

MFR RecommendedRFQ

WW3FT270R

Stackpole Electronics IncIn Stock: 3356WW3FT270R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UB3C-270RF8 are qualified based on the following electrical and mechanical parameters:

• Resistance value: 270 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package: Axial through-hole
• Temperature coefficient: ±20ppm/°C
• RoHS compliance: ROHS3 Compliant

All identified substitutes maintain these core specifications. Variations in physical dimensions, operating temperature ranges, and packaging formats (Tape & Reel versus Cut Tape) do not affect electrical interchangeability within the specified parameter set.

Parameter Comparison

Engineering Selection Recommendations

All three parts meet the core electrical requirements for 270 Ohms ±1% 3W wirewound axial resistor applications. Selection between UB3C-270RF8, RS02B270R0FE70, and WW3FT270R is determined by physical space constraints and operating temperature requirements.

The UB3C-270RF8 features the smallest physical footprint at 0.157" diameter and 0.350" length. This configuration is suitable for space-constrained applications within the -55°C to 250°C operating range.

The RS02B270R0FE70 and WW3FT270R share identical physical dimensions (0.187" diameter and 0.560" length) and are suitable for applications where additional board space is available. The WW3FT270R extends the upper operating temperature limit to 350°C, providing thermal margin for high-temperature environments.

All parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can RS02B270R0FE70 or WW3FT270R be used as direct replacements for UB3C-270RF8?

A: Yes, provided physical dimensions are compatible with the PCB layout. The UB3C-270RF8 has a smaller footprint (0.157" Dia x 0.350" L) compared to the substitute parts (0.187" Dia x 0.560" L). Verify available board space before substitution.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel packaging is used for automated assembly processes, while Cut Tape is used for manual or semi-automated assembly. Both formats contain identical components; packaging selection depends on manufacturing process requirements.

Q: Are there temperature range differences between the substitute parts?

A: Yes. The UB3C-270RF8 and WW3FT270R operate from -55°C to 250°C and -55°C to 350°C respectively. The RS02B270R0FE70 extends the lower temperature limit to -65°C. Select based on application temperature requirements.

Q: Do all parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: What determines electrical interchangeability?

A: Electrical interchangeability is determined by matching resistance value (270 Ohms), tolerance (±1%), power rating (3W), composition (wirewound), and temperature coefficient (±20ppm/°C). All identified substitutes meet these criteria.