UB3C-27RF1 Equivalent & Substitute Parts

Part Overview

The UB3C-27RF1 is a 27 Ohm ±1% 3W 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 active in production with 877 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same package category.

Substiute Parts

UB3C-27RF1

RiedonIn Stock: 914UB3C-27RF1 Datasheet

Current PartRFQ

43F27RE

OhmiteIn Stock: 118243F27RE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UB3C-27RF1 is determined by strict equivalence across the following critical parameters:

• Resistance value: 27 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package: Axial through-hole
• Temperature coefficient: ±20ppm/°C
• RoHS compliance: ROHS3 Compliant

The substitute part 43F27RE meets all electrical specifications and maintains axial package compatibility. Physical dimensions may vary within the axial package category without affecting functional performance in standard through-hole PCB applications.

Parameter Comparison

Engineering Selection Recommendations

Both the UB3C-27RF1 and 43F27RE are active production components with ROHS3 compliance and identical electrical specifications. Selection between these parts should be based on:

• PCB layout constraints: The UB3C-27RF1 has a smaller footprint (4.00mm diameter vs 5.60mm), which may be advantageous in space-constrained designs.
• Inventory availability: The 43F27RE has 1148 units in stock compared to 877 units for the UB3C-27RF1.
• Supply chain considerations: Both parts carry the same ECCN and HTSUS classifications, ensuring equivalent regulatory treatment.

Frequently Asked Questions (FAQ)

Q: Can the 43F27RE replace the UB3C-27RF1 in my circuit?

A: Yes. Both components share identical electrical specifications: 27 Ohms ±1% tolerance, 3W power rating, ±20ppm/°C temperature coefficient, and wirewound composition. Both are ROHS3 compliant with two terminations in axial package configuration.

Q: What is the difference in physical size between these parts?

A: The UB3C-27RF1 measures 0.157" diameter x 0.350" length (4.00mm x 8.90mm), while the 43F27RE measures 0.220" diameter x 0.594" length (5.60mm x 15.10mm). Both are axial through-hole components; physical dimension differences do not affect electrical performance but may impact PCB layout.

Q: Are both parts suitable for current sensing applications?

A: The UB3C-27RF1 is specifically designated for current sense applications with additional features including flame proof, moisture resistant, and pulse withstanding characteristics. The 43F27RE is a standard wirewound resistor without these specified features. Application requirements should determine which part is appropriate.

Q: Do these parts have different operating temperature ranges?

A: The UB3C-27RF1 operates from -55°C to 250°C. The operating temperature range for the 43F27RE is not specified in the provided data. Verify operating temperature requirements against your application specifications.

Q: Are there any compliance or regulatory differences?

A: Both parts are ROHS3 compliant, carry EAR99 ECCN classification, and share the same HTSUS code (8533.21.0080). No regulatory differences exist between these components.