UB3C-22RF8 Equivalent & Substitute Parts

Part Overview

The UB3C-22RF8 is a 22 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, and pulse-withstanding characteristics. The part is currently active in production with 947 units in stock. Substitute parts are necessary to address supply chain flexibility, alternative packaging requirements, or inventory availability across different distribution channels.

Substiute Parts

UB3C-22RF8

RiedonIn Stock: 965UB3C-22RF8 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-22RF8 is determined by the following critical parameters:

• Resistance value: 22 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 3W (exact match required)
• Composition: Wirewound (exact match required)
• Package type: Axial (exact match required)
• Temperature coefficient: ±20ppm/°C (exact match required)
• Operating temperature range: minimum -55°C, maximum 250°C or higher
• Termination count: 2 (exact match required)

The two substitute parts listed—43F22RE (Ohmite) and RS02B22R00FE70 (Vishay Dale)—meet all critical electrical and mechanical parameters. Physical dimensions vary within acceptable tolerances for axial through-hole mounting. Both substitutes maintain the same resistance, tolerance, power rating, composition, and temperature coefficient specifications.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are suitable for direct replacement of the UB3C-22RF8 based on electrical and mechanical equivalence. Selection between alternatives should consider the following factors:

43F22RE (Ohmite): This part offers an extended upper operating temperature limit of 275°C compared to the original 250°C specification. It is available in bulk packaging. RoHS compliance is confirmed, though REACH status is vendor-undefined. Current inventory is 665 units.

RS02B22R00FE70 (Vishay Dale): This part maintains the original 250°C upper temperature limit and extends the lower operating temperature to -65°C. It features moisture-resistant characteristics and is supplied in cut tape format. ROHS3 compliance and REACH unaffected status are confirmed. Current inventory is 3424 units, providing superior availability.

Both parts carry EAR99 export classification and are suitable for applications requiring wirewound axial resistors with 22 Ohm resistance, ±1% tolerance, and 3W power rating.

Frequently Asked Questions (FAQ)

Q: Can 43F22RE replace UB3C-22RF8 in all applications? A: Yes, provided the application does not require the specific features listed for the UB3C-22RF8 (current sense, flame proof, pulse withstanding, safety). The 43F22RE meets all core electrical and mechanical parameters for direct substitution.

Q: What is the difference in physical dimensions between these parts? A: UB3C-22RF8 measures 0.157" diameter × 0.350" length. 43F22RE measures 0.220" diameter × 0.594" length. RS02B22R00FE70 measures 0.187" diameter × 0.560" length. All are axial through-hole components compatible with standard PCB layouts, though board space requirements differ.

Q: Does RS02B22R00FE70 have the same feature set as the original? A: RS02B22R00FE70 includes moisture-resistant characteristics but does not specify current sense, flame proof, or pulse withstanding features. Electrical and mechanical parameters are equivalent.

Q: Which substitute offers the best inventory availability? A: RS02B22R00FE70 has 3424 units in stock, compared to 665 units for 43F22RE and 947 units for the original UB3C-22RF8.

Q: Are all three parts RoHS compliant? A: UB3C-22RF8 and RS02B22R00FE70 are ROHS3 compliant. 43F22RE is RoHS compliant with vendor-undefined REACH status.

Q: What packaging formats are available? A: UB3C-22RF8 is supplied in tape & reel format. 43F22RE is supplied in bulk. RS02B22R00FE70 is supplied in cut tape format.