UB3C-47RF1 Equivalent & Substitute Parts

Part Overview

The UB3C-47RF1 is a 47 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 1,014 units in stock. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits alternative sourcing from qualified manufacturers.

Key Parameters

Parameter	Value
Resistance	47 Ohms
Tolerance	±1%
Power Rating	3W
Composition	Wirewound
Package Type	Axial
Temperature Coefficient	±20ppm/°C
Operating Temperature Range	-55°C ~ 250°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the UB3C-47RF1 are qualified based on the following electrical and mechanical parameters:

Core Substitution Criteria:

Resistance value: 47 Ohms
Tolerance: ±1%
Power rating: 3W
Composition: Wirewound
Package: Axial through-hole
Temperature coefficient: ±20ppm/°C
Termination count: 2

All identified substitute parts meet these core electrical specifications. Variations in physical dimensions, operating temperature range, and feature sets are documented in the parameter comparison table to support design validation and thermal management assessment.

Parameter Comparison

Parameter	UB3C-47RF1 (Riedon)	43F47RE (Ohmite)	RS02B47R00FE70 (Vishay Dale)	WW3FT47R0 (Stackpole)
Resistance	47 Ohms	47 Ohms	47 Ohms	47 Ohms
Tolerance	±1%	±1%	±1%	±1%
Power Rating	3W	3W	3W	3W
Composition	Wirewound	Wirewound	Wirewound	Wirewound
Temperature Coefficient	±20ppm/°C	±20ppm/°C	±20ppm/°C	±20ppm/°C
Operating Temperature Range	-55°C ~ 250°C	-55°C ~ 275°C	-65°C ~ 250°C	-55°C ~ 350°C
Package / Case	Axial	Axial	Axial	Axial
Size / Dimension	0.157" Dia x 0.350" L (4.00mm x 8.90mm)	0.220" Dia x 0.594" L (5.60mm x 15.10mm)	0.187" Dia x 0.560" L (4.75mm x 14.22mm)	0.187" Dia x 0.560" L (4.75mm x 14.22mm)
RoHS Status	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Not Applicable	Not Applicable
Packaging	Bulk	Bulk	Cut Tape (CT)	Cut Tape (CT)
Inventory Availability	1,014 Pcs	997 Pcs	3,861 Pcs	4,741 Pcs

Engineering Selection Recommendations

All substitute parts are active products with current manufacturing status and meet ROHS3 or equivalent RoHS compliance requirements. Selection among UB3C-47RF1, 43F47RE, RS02B47R00FE70, and WW3FT47R0 is determined by:

Physical Space Constraints: The UB3C-47RF1 features the smallest axial profile (4.00mm diameter × 8.90mm length). The 43F47RE is the largest (5.60mm diameter × 15.10mm length). RS02B47R00FE70 and WW3FT47R0 share identical dimensions (4.75mm diameter × 14.22mm length). PCB layout and thermal clearance requirements must be evaluated against available component footprints.

Temperature Operating Range: The UB3C-47RF1 operates from -55°C to 250°C. The 43F47RE extends to 275°C, RS02B47R00FE70 extends to -65°C minimum, and WW3FT47R0 extends to 350°C maximum. Applications requiring extended temperature performance should reference the specific operating environment.

Compliance and Certifications: All parts carry ROHS3 or equivalent compliance. REACH status is confirmed as "REACH Unaffected" for UB3C-47RF1, RS02B47R00FE70, and WW3FT47R0. The 43F47RE lists REACH status as "Vendor Undefined." ECCN classification is EAR99 for all parts.

Inventory and Packaging: RS02B47R00FE70 and WW3FT47R0 offer higher stock levels (3,861 and 4,741 units respectively) and are supplied in Cut Tape packaging. UB3C-47RF1 and 43F47RE are supplied in Bulk packaging.

Frequently Asked Questions (FAQ)

Q: Can RS02B47R00FE70 or WW3FT47R0 be used as direct replacements for UB3C-47RF1?

A: Yes. All three parts share identical electrical specifications: 47 Ohms ±1% tolerance, 3W power rating, wirewound composition, ±20ppm/°C temperature coefficient, and axial package type. Physical dimensions differ; PCB layout compatibility must be confirmed before substitution.

Q: What is the primary difference between UB3C-47RF1 and 43F47RE?

A: Both parts meet core electrical requirements. The 43F47RE has a larger axial profile (5.60mm diameter × 15.10mm length versus 4.00mm × 8.90mm) and extends the upper operating temperature to 275°C. The UB3C-47RF1 includes additional features: current sense designation, flame-proof, and safety-rated construction.

Q: Are there physical space limitations when substituting with RS02B47R00FE70 or WW3FT47R0?

A: Both parts have identical dimensions (4.75mm diameter × 14.22mm length), which is larger than the UB3C-47RF1 (4.00mm × 8.90mm) but smaller than the 43F47RE (5.60mm × 15.10mm). Board layout and component clearance must be validated for each application.

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

A: UB3C-47RF1 and 43F47RE are rated MSL 1 (Unlimited). RS02B47R00FE70 and WW3FT47R0 list MSL as Not Applicable, indicating moisture sensitivity is not a limiting factor for these components.

Q: Which substitute part offers the widest operating temperature range?

A: WW3FT47R0 operates from -55°C to 350°C, providing the broadest temperature envelope. RS02B47R00FE70 extends the lower limit to -65°C. Selection depends on specific thermal requirements of the application.

Q: Are all parts RoHS compliant?

A: Yes. UB3C-47RF1, RS02B47R00FE70, and WW3FT47R0 are ROHS3 Compliant. The 43F47RE is RoHS Compliant. All parts carry EAR99 ECCN classification and HTSUS code 8533.21.0080 where specified.

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