43F3R0 Equivalent & Substitute Parts Reference

Part Overview

The 43F3R0 is a 3 Ohm ±1% 3W axial wirewound through-hole resistor manufactured by Ohmite in the Ohmicone® 40 series. This component is currently active in production with 1056 pieces in stock. Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required, or when compliance certifications differ between procurement requirements and available inventory.

Key Parameters

Parameter	Value
Resistance	3 Ohms
Tolerance	±1%
Power Rating	3W
Composition	Wirewound
Package Type	Axial
Temperature Coefficient	±50ppm/°C
Number of Terminations	2

Substitute Part Grouping Explanation

Substitute parts for the 43F3R0 are qualified based on the following electrical and mechanical parameters:

Resistance value: 3 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: ±50ppm/°C (exact match required)
Termination count: 2 (exact match required)

All substitute parts listed meet these core electrical specifications. Variations exist in physical dimensions, operating temperature ranges, RoHS compliance status, and packaging formats (bulk versus cut tape). These variations do not affect functional equivalence but may impact procurement, environmental compliance, and assembly processes.

Parameter Comparison

Parameter	43F3R0 (Ohmite)	43F3R0E (Ohmite)	ALSR033R000FE12 (Vishay Dale)	RS02B3R000FS70 (Vishay Dale)
Resistance	3 Ohms	3 Ohms	3 Ohms	3 Ohms
Tolerance	±1%	±1%	±1%	±1%
Power Rating	3W	3W	3W	3W
Composition	Wirewound	Wirewound	Wirewound	Wirewound
Package Type	Axial	Axial	Axial	Axial
Temperature Coefficient	±50ppm/°C	±50ppm/°C	±50ppm/°C	±50ppm/°C
Size / Dimension	0.220" Dia x 0.594" L (5.60mm x 15.10mm)	0.220" Dia x 0.594" L (5.60mm x 15.10mm)	0.180" Dia x 0.500" L (4.57mm x 12.70mm)	0.187" Dia x 0.560" L (4.75mm x 14.22mm)
Operating Temperature Range	Not specified	-55°C ~ 275°C	-65°C ~ 250°C	-65°C ~ 250°C
RoHS Status	RoHS non-compliant	RoHS Compliant	ROHS3 Compliant	RoHS non-compliant
Packaging Format	Standard	Bulk	Bulk	Cut Tape (CT)
Inventory Available	1056 Pcs	1166 Pcs	842 Pcs	1934 Pcs

Engineering Selection Recommendations

43F3R0E (Ohmite): This part is the direct equivalent from the same manufacturer with identical electrical specifications and physical dimensions. It differs only in packaging format (bulk) and offers improved RoHS compliance status. Selection is appropriate when RoHS compliance is required and bulk packaging is acceptable for assembly processes.

ALSR033R000FE12 (Vishay Dale): This substitute meets all core electrical parameters and offers ROHS3 compliance. Physical dimensions are smaller (0.180" diameter versus 0.220"), which may affect PCB layout compatibility. The moisture-resistant feature provides additional environmental protection. Operating temperature range extends to -65°C, providing broader thermal performance. Selection is appropriate when space constraints permit smaller dimensions and enhanced environmental protection is beneficial.

RS02B3R000FS70 (Vishay Dale): This substitute meets all core electrical parameters and is available in cut tape packaging format. Physical dimensions are intermediate between the original and ALSR series. The part maintains RoHS non-compliant status matching the original 43F3R0. Moisture-resistant construction is included. Selection is appropriate when cut tape packaging is required for automated assembly and RoHS compliance is not a constraint.

Frequently Asked Questions (FAQ)

Q: Can 43F3R0E be used as a direct replacement for 43F3R0?

A: Yes. Both parts are manufactured by Ohmite with identical electrical specifications (3 Ohms, ±1%, 3W, wirewound, axial) and physical dimensions (0.220" Dia x 0.594" L). The primary difference is packaging format and RoHS compliance status.

Q: What are the physical dimension differences between substitute parts?

A: The 43F3R0 and 43F3R0E measure 0.220" diameter by 0.594" length. The ALSR033R000FE12 is smaller at 0.180" diameter by 0.500" length. The RS02B3R000FS70 is intermediate at 0.187" diameter by 0.560" length. These differences may affect PCB layout and mounting clearances.

Q: Which substitute part offers the best environmental compliance?

A: The ALSR033R000FE12 carries ROHS3 compliance certification. The 43F3R0E is RoHS Compliant. Both the original 43F3R0 and RS02B3R000FS70 are RoHS non-compliant. Selection depends on specific compliance requirements for your application.

Q: Are all substitute parts moisture-resistant?

A: The ALSR033R000FE12 and RS02B3R000FS70 are specified as moisture-resistant wirewound resistors. The 43F3R0 and 43F3R0E do not list moisture-resistant features in their specifications.

Q: What packaging formats are available?

A: The 43F3R0 uses standard packaging. The 43F3R0E is available in bulk format. The RS02B3R000FS70 is supplied in cut tape (CT) format. Packaging selection affects procurement, storage, and assembly automation compatibility.

Q: Do all parts share the same temperature coefficient?

A: Yes. All listed parts specify ±50ppm/°C temperature coefficient, ensuring consistent thermal performance across substitutions.

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