UB5C-15RF2 Equivalent & Substitute Parts

Part Overview

The UB5C-15RF2 is a 15 Ohm, ±1% tolerance, 5W axial wirewound resistor manufactured by Riedon. This component is designed for through-hole applications requiring current sensing functionality with enhanced reliability features including flame proof, moisture resistant, and pulse withstanding characteristics. The part is currently in active production status with 832 units available in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter range.

Substiute Parts

UB5C-15RF2

RiedonIn Stock: 856UB5C-15RF2 Datasheet

Current PartRFQ

45F15RE

OhmiteIn Stock: 140045F15RE Datasheet

MFR RecommendedRFQ

WHE15RFET

OhmiteIn Stock: 1919WHE15RFET Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UB5C-15RF2 is determined by strict equivalence across the following electrical and mechanical parameters:

• Resistance value: 15 Ohms
• Tolerance: ±1%
• Power rating: 5W
• Composition: Wirewound
• Package configuration: Axial through-hole
• Temperature coefficient: ±20ppm/°C
• RoHS compliance status

The identified substitute parts (45F15RE and WHE15RFET) meet all core electrical specifications. Mechanical dimensions may vary within acceptable limits for axial package types. Operating temperature ranges and additional features are noted but do not disqualify substitution when core parameters align.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active product status and meet core electrical equivalence criteria. Selection between UB5C-15RF2, 45F15RE, and WHE15RFET should be based on the following factors:

UB5C-15RF2 (Riedon): Provides the widest operating temperature range (-55°C ~ 250°C) and includes current sense, flame proof, and pulse withstanding features. ROHS3 compliant. Supplied in Tape & Reel format with 832 units in stock.

45F15RE (Ohmite Ohmicone® 40 Series): Meets all electrical specifications with ROHS3 compliance. Supplied in bulk packaging with 1387 units in stock. Operating temperature range not specified. Suitable for applications where packaging format flexibility is acceptable.

WHE15RFET (Ohmite WH Series): Features non-inductive construction with ROHS compliance. Operating temperature range limited to -55°C ~ 150°C. Supplied in Tape & Reel format with 1823 units in stock. Appropriate for applications requiring non-inductive characteristics within the specified temperature window.

Frequently Asked Questions (FAQ)

Q: Can WHE15RFET replace UB5C-15RF2 in all applications?

A: WHE15RFET meets the core electrical specifications (15 Ohms, ±1%, 5W, wirewound, axial). However, the operating temperature range is limited to -55°C ~ 150°C compared to UB5C-15RF2's -55°C ~ 250°C. Substitution is valid only for applications operating within the -55°C ~ 150°C window.

Q: What is the significance of the non-inductive feature in WHE15RFET?

A: Non-inductive construction reduces parasitic inductance in the resistor element. This feature is specified in the WHE15RFET data but not listed for the other two parts. Selection should be based on circuit requirements for inductance performance.

Q: Are there packaging considerations when substituting these parts?

A: Yes. UB5C-15RF2 and WHE15RFET are supplied in Tape & Reel format suitable for automated assembly. 45F15RE is supplied in bulk packaging, which may require manual handling or reel conversion depending on assembly process requirements.

Q: Do all three parts meet RoHS requirements?

A: UB5C-15RF2 and 45F15RE are ROHS3 compliant. WHE15RFET is RoHS compliant. Both compliance levels are acceptable for most applications; verify specific project requirements if ROHS3 certification is mandatory.

Q: What are the physical dimension differences?

A: UB5C-15RF2 is the smallest (6.40mm diameter × 12.70mm length). WHE15RFET is intermediate (7.50mm × 20.00mm). 45F15RE is the largest (8.70mm × 23.80mm). PCB layout and thermal considerations may influence selection based on available space.