UB3C-22RF1 Equivalent & Substitute Parts

Part Overview

The UB3C-22RF1 is a 22 Ohm ±1% 3W axial wirewound resistor manufactured by Riedon. This component is designed for through-hole applications requiring current sensing with enhanced reliability features including flame proof, moisture resistant, pulse withstanding, and safety certifications. The part is currently active in production with 884 units in stock. Substitute parts are necessary to address supply chain flexibility, alternative sourcing options, and inventory management across multiple manufacturers while maintaining equivalent electrical and mechanical performance.

Substiute Parts

UB3C-22RF1

RiedonIn Stock: 954UB3C-22RF1 Datasheet

Current PartRFQ

43F22RE

OhmiteIn Stock: 69943F22RE Datasheet

MFR RecommendedRFQ

RS02B22R00FE70

Vishay DaleIn Stock: 3501RS02B22R00FE70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UB3C-22RF1 is determined by strict equivalence across the following critical parameters:

• Resistance value: 22 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package configuration: Axial through-hole
• Temperature coefficient: ±20ppm/°C
• Number of terminations: 2

All identified substitute parts meet these core electrical specifications. Physical dimensions may vary within acceptable assembly tolerances for axial components. Operating temperature ranges and feature sets are provided for reference but do not restrict substitution eligibility when core parameters align.

Parameter Comparison

Engineering Selection Recommendations

All three parts meet the core electrical requirements for 22 Ohm ±1% 3W wirewound axial resistor applications. Selection should be based on the following factors:

UB3C-22RF1 (Riedon): Primary choice when current sensing, flame proof, moisture resistant, pulse withstanding, and safety features are specified requirements. ROHS3 compliant with REACH unaffected status. Compact form factor (4.00mm diameter).

43F22RE (Ohmite): Suitable for applications where extended upper operating temperature (275°C) is beneficial. RoHS compliant with larger physical dimensions (5.60mm diameter). REACH status vendor undefined.

RS02B22R00FE70 (Vishay Dale): Highest inventory availability (3424 units). Moisture resistant feature included. ROHS3 compliant with REACH unaffected status. Extended lower operating temperature (-65°C). Intermediate physical dimensions (4.75mm diameter). Available in Cut Tape packaging.

Frequently Asked Questions (FAQ)

Q: Can 43F22RE replace UB3C-22RF1 in a PCB layout with tight spacing constraints?

A: Physical dimensions differ. The 43F22RE measures 0.220" diameter x 0.594" length compared to UB3C-22RF1 at 0.157" diameter x 0.350" length. Board layout verification is required before substitution.

Q: What is the difference in moisture handling between these parts?

A: UB3C-22RF1 and 43F22RE both specify MSL 1 (Unlimited). RS02B22R00FE70 lists MSL as Not Applicable, indicating different moisture sensitivity classification.

Q: Are all three parts suitable for current sensing applications?

A: UB3C-22RF1 explicitly includes current sensing as a specified feature. The other parts meet the electrical parameters for current sensing but do not list this as a documented feature.

Q: Which substitute offers the best supply availability?

A: RS02B22R00FE70 has the highest current inventory at 3424 units, compared to 665 units for 43F22RE and 884 units for UB3C-22RF1.

Q: Do all parts meet RoHS compliance?

A: Yes. UB3C-22RF1 and RS02B22R00FE70 are ROHS3 compliant. 43F22RE is RoHS compliant. All three meet RoHS requirements.

Q: What is the temperature range difference between substitutes?

A: UB3C-22RF1 operates -55°C to 250°C. 43F22RE extends to 275°C maximum. RS02B22R00FE70 extends to -65°C minimum. Application temperature requirements determine suitability.