UB3C-1R5F8 Equivalent & Substitute Parts

Part Overview

The UB3C-1R5F8 is a 1.5 Ohm ±1% 3W axial wirewound resistor manufactured by Riedon. This through-hole component is designed for current sensing applications and features flame-proof, moisture-resistant, pulse-withstanding, and safety-rated construction. The part is currently active in production with 812 units in stock. Substitute parts are necessary to address supply chain continuity, packaging preferences, or inventory availability while maintaining electrical and mechanical compatibility.

Substiute Parts

UB3C-1R5F8

RiedonIn Stock: 888UB3C-1R5F8 Datasheet

Current PartRFQ

43F1R5E

OhmiteIn Stock: 123443F1R5E Datasheet

MFR RecommendedRFQ

ALSR031R500FE12

Vishay DaleIn Stock: 831ALSR031R500FE12 Datasheet

MFR RecommendedRFQ

RS02B1R500FE70

Vishay DaleIn Stock: 3315RS02B1R500FE70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UB3C-1R5F8 is determined by the following mandatory parameters:

• Resistance value: 1.5 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package type: Axial
• Temperature coefficient: ±50ppm/°C
• RoHS compliance: ROHS3 Compliant

All three substitute parts meet these core electrical and mechanical requirements. Variations in physical dimensions, packaging format (Tape & Reel vs. Bulk vs. Cut Tape), operating temperature range, and feature sets do not affect functional substitutability for applications requiring these specified parameters.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are active products with ROHS3 compliance and meet the core electrical specifications of the UB3C-1R5F8. Selection among these alternatives should be based on:

• Packaging format requirements: The UB3C-1R5F8 is supplied in Tape & Reel format. The 43F1R5E is available in Bulk packaging, while the RS02B1R500FE70 is supplied in Cut Tape format. The ALSR031R500FE12 is available in Bulk format.
• Physical dimensions: The UB3C-1R5F8 has the smallest footprint (4.00mm diameter). The 43F1R5E has the largest diameter (5.60mm). The ALSR031R500FE12 and RS02B1R500FE70 fall between these dimensions.
• Operating temperature range: The ALSR031R500FE12 and RS02B1R500FE70 extend the lower operating limit to -65°C compared to the UB3C-1R5F8 at -55°C.
• Inventory availability: RS02B1R500FE70 has the highest stock level at 3279 units, followed by 43F1R5E at 1131 units and ALSR031R500FE12 at 774 units.

Frequently Asked Questions (FAQ)

Q: Can the 43F1R5E replace the UB3C-1R5F8 in my circuit?

A: Yes. Both parts share identical electrical specifications: 1.5 Ohms ±1% tolerance, 3W power rating, ±50ppm/°C temperature coefficient, and ROHS3 compliance. The primary difference is physical size and packaging format. The 43F1R5E is larger in diameter (5.60mm vs. 4.00mm) and supplied in Bulk packaging rather than Tape & Reel.

Q: What is the difference between the Vishay Dale ALSR031R500FE12 and RS02B1R500FE70?

A: Both are Vishay Dale 1.5 Ohm 3W wirewound axial resistors with identical electrical specifications. The ALSR031R500FE12 is supplied in Bulk packaging with a 4.57mm diameter, while the RS02B1R500FE70 is supplied in Cut Tape format with a 4.75mm diameter. The RS02B1R500FE70 has significantly higher inventory availability.

Q: Are there any temperature range limitations when substituting?

A: The UB3C-1R5F8 operates from -55°C to 250°C. The ALSR031R500FE12 and RS02B1R500FE70 extend the lower limit to -65°C, providing a wider operating range. The 43F1R5E does not specify an operating temperature range. For applications requiring the full -55°C to 250°C range, all parts are suitable.

Q: Does physical size matter for substitution?

A: Physical dimensions affect PCB layout and mechanical fit. The UB3C-1R5F8 (4.00mm diameter) is the smallest. If space is constrained, verify that substitute parts with larger diameters fit within your design. The 43F1R5E (5.60mm diameter) is the largest and may not fit in compact layouts.

Q: Which substitute has the best availability?

A: The RS02B1R500FE70 has the highest inventory at 3279 units in stock, followed by the 43F1R5E at 1131 units and the ALSR031R500FE12 at 774 units.