WW3AFT47R0 Equivalent & Substitute Parts

Part Overview

The WW3AFT47R0 is a 47 Ohm, 1% tolerance, 3W axial wirewound resistor manufactured by Stackpole Electronics Inc. This component is designed for through-hole applications requiring moisture-resistant performance and tight tolerance specifications. The part is currently in active production status with 1058 units available in tape and reel packaging. Substitute parts are necessary to address packaging format preferences, inventory availability, or supply chain continuity while maintaining equivalent electrical and mechanical performance.

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 ~ 350°C
Terminations	2
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the WW3AFT47R0 are qualified based on the following electrical and mechanical parameters:

Core Electrical Parameters (Must Match):

Resistance value: 47 Ohms
Tolerance: ±1%
Power rating: 3W
Temperature coefficient: ±20ppm/°C
Composition: Wirewound

Core Mechanical Parameters (Must Match):

Package type: Axial
Number of terminations: 2
Physical dimensions: Compatible with 0.187" diameter axial form factor

Acceptable Variations:

Packaging format (Tape & Reel, Cut Tape, or Bulk)
Operating temperature range (minimum -55°C, maximum ≥250°C)
Moisture resistance features (present or absent)
Physical dimensions within standard axial tolerances

All three substitute parts meet these criteria and are classified as active products with current manufacturing status.

Parameter Comparison

Parameter	WW3AFT47R0 (Main)	WW3FT47R0	43F47RE	RS02B47R00FE70
Manufacturer	Stackpole Electronics Inc	Stackpole Electronics Inc	Ohmite	Vishay Dale
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	-55°C ~ 350°C	-55°C ~ 350°C	-55°C ~ 275°C	-65°C ~ 250°C
Package Type	Axial	Axial	Axial	Axial
Packaging Format	Tape & Reel (TR)	Cut Tape (CT)	Bulk	Cut Tape (CT)
Size / Dimension	0.187" Dia x 0.560" L (4.75mm x 14.22mm)	0.187" Dia x 0.560" L (4.75mm x 14.22mm)	0.220" Dia x 0.594" L (5.60mm x 15.10mm)	0.187" Dia x 0.560" L (4.75mm x 14.22mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant
Inventory (Pcs)	1058	4741	997	3861

Engineering Selection Recommendations

WW3FT47R0 (Stackpole Electronics Inc): This substitute is electrically and mechanically identical to the main part, differing only in packaging format (Cut Tape versus Tape & Reel). Both are ROHS3 compliant with identical operating temperature ranges and physical dimensions. This part is recommended for applications where cut tape packaging is acceptable and higher inventory availability is beneficial.

43F47RE (Ohmite): This substitute meets all core electrical specifications and operates within the required temperature range (-55°C to 275°C). Physical dimensions differ slightly (0.220" diameter versus 0.187"), which may affect board layout compatibility. RoHS compliance is confirmed. This part is suitable for applications where dimensional variation is acceptable and bulk packaging is preferred.

RS02B47R00FE70 (Vishay Dale): This substitute provides identical electrical specifications and physical dimensions to the main part. Operating temperature range extends to -65°C minimum and 250°C maximum. ROHS3 compliance and moisture-resistant features are confirmed. This part is recommended for applications requiring extended low-temperature performance or moisture-resistant specifications.

Frequently Asked Questions (FAQ)

Q: Can WW3FT47R0 be used as a direct replacement for WW3AFT47R0?

A: Yes. Both parts are manufactured by Stackpole Electronics Inc with identical electrical and mechanical specifications. The only difference is packaging format: WW3AFT47R0 is supplied in Tape & Reel format, while WW3FT47R0 is supplied in Cut Tape format. Electrical performance and physical dimensions are equivalent.

Q: What is the primary difference between the Ohmite 43F47RE and the main part?

A: The 43F47RE has a larger physical diameter (0.220" versus 0.187") and a slightly longer length (0.594" versus 0.560"). The maximum operating temperature is also lower at 275°C compared to 350°C. All electrical parameters remain identical. Verify board layout compatibility before selection.

Q: Are all substitute parts RoHS compliant?

A: Yes. WW3FT47R0 and RS02B47R00FE70 are ROHS3 compliant. The Ohmite 43F47RE is RoHS compliant. All three meet regulatory requirements for lead-free manufacturing.

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

A: The main part WW3AFT47R0 operates from -55°C to 350°C. The RS02B47R00FE70 extends the minimum temperature to -65°C but limits the maximum to 250°C. The 43F47RE operates from -55°C to 275°C. Select based on your specific application temperature requirements.

Q: Can the 43F47RE be used in a PCB layout designed for the WW3AFT47R0?

A: Physical dimensions differ. The 43F47RE is larger (0.220" diameter and 0.594" length versus 0.187" diameter and 0.560" length). Verify that the PCB layout accommodates these dimensional differences before substitution.

Q: What packaging formats are available for these substitute parts?

A: WW3AFT47R0 is supplied in Tape & Reel format. WW3FT47R0 is available in Cut Tape format. The Ohmite 43F47RE is supplied in Bulk packaging. RS02B47R00FE70 is available in Cut Tape format. Select based on your assembly process requirements.

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