UB3C-100RF8 Equivalent & Substitute Parts

Part Overview

The UB3C-100RF8 is a 100 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, pulse-withstanding, and safety-rated construction. The part is currently active in production with 1652 units in stock. Equivalent and substitute parts are identified when identical electrical specifications and mechanical compatibility requirements are met across alternative manufacturers.

Substiute Parts

UB3C-100RF8

RiedonIn Stock: 1762UB3C-100RF8 Datasheet

Current PartRFQ

43F100E

OhmiteIn Stock: 124043F100E Datasheet

MFR RecommendedRFQ

RS02B100R0FE70

Vishay DaleIn Stock: 1158RS02B100R0FE70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UB3C-100RF8 is determined by strict equivalence across the following parameters:

• Resistance value: 100 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package: Axial
• Temperature coefficient: ±20ppm/°C
• Regulatory compliance: ROHS3 Compliant and REACH Unaffected

All identified substitute parts meet these core electrical and mechanical requirements. Physical dimensions may vary within the axial package category, as long as the component functions within the specified electrical parameters and maintains compatibility with standard through-hole PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

All three parts—UB3C-100RF8, 43F100E, and RS02B100R0FE70—are electrically and mechanically equivalent for applications requiring a 100 Ohms ±1% 3W axial wirewound resistor. Selection among these parts may be based on:

• Packaging format: UB3C-100RF8 and RS02B100R0FE70 are supplied in Cut Tape (CT); 43F100E is supplied in Bulk
• Current inventory availability: UB3C-100RF8 (1652 units), 43F100E (1139 units), RS02B100R0FE70 (1073 units)
• Physical dimensions: Slight variations exist; verify PCB layout constraints if space is critical
• Operating temperature range: UB3C-100RF8 operates -55°C to 250°C; RS02B100R0FE70 operates -65°C to 250°C; 43F100E operating temperature not specified in available data
• Feature set: UB3C-100RF8 includes current sense, flame-proof, moisture-resistant, pulse-withstanding, and safety features; RS02B100R0FE70 includes moisture-resistant features; 43F100E features not specified

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

Frequently Asked Questions (FAQ)

Q: Can 43F100E replace UB3C-100RF8 in all applications?

A: Yes, provided that the bulk packaging format is acceptable for your procurement process and that the unspecified operating temperature range does not conflict with your application requirements. Electrical specifications are identical.

Q: What is the primary difference between these substitute parts?

A: The primary differences are packaging format (Cut Tape versus Bulk), physical dimensions, and feature documentation. Electrically and mechanically, all three parts are equivalent for standard through-hole PCB applications.

Q: Does the RS02B100R0FE70 offer advantages over the UB3C-100RF8?

A: The RS02B100R0FE70 extends the lower operating temperature limit to -65°C compared to -55°C for the UB3C-100RF8. If your application requires operation below -55°C, the RS02B100R0FE70 is the appropriate selection. Otherwise, both parts are functionally equivalent.

Q: Are physical dimension differences critical for PCB layout?

A: Axial resistors are generally flexible in placement within through-hole designs. However, if your PCB layout has tight spacing constraints, verify that the specific dimensions of your selected part fit within the allocated footprint. Dimensions vary: UB3C-100RF8 is 0.157" Dia x 0.350" L; 43F100E is 0.220" Dia x 0.594" L; RS02B100R0FE70 is 0.187" Dia x 0.560" L.

Q: Are all parts suitable for current sense applications?

A: The UB3C-100RF8 is explicitly rated for current sense applications. The 43F100E and RS02B100R0FE70 meet the same electrical specifications and are suitable for current sense use, though this application is not explicitly documented in their available specifications.