WW3AFTR100 Equivalent & Substitute Parts

Part Overview

The WW3AFTR100 is a 100 mOhms ±1% 3W axial wirewound resistor manufactured by Stackpole Electronics Inc. This component is designed for through-hole applications requiring precision current-sensing or low-resistance load applications. The part maintains Active product status with 1070 units in current inventory. Equivalent and substitute parts are identified when identical electrical specifications and compatible mechanical parameters are maintained across alternative manufacturers.

Substiute Parts

WW3AFTR100

Stackpole Electronics IncIn Stock: 1106WW3AFTR100 Datasheet

Current PartRFQ

43FR10E

OhmiteIn Stock: 2463243FR10E Datasheet

MFR RecommendedRFQ

ALSR03R1000FE12

Vishay DaleIn Stock: 5697ALSR03R1000FE12 Datasheet

MFR RecommendedRFQ

RS02BR1000FE70

Vishay DaleIn Stock: 2121RS02BR1000FE70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the WW3AFTR100 is determined by strict equivalence across the following critical parameters:

• Resistance value: 100 mOhms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package: Axial through-hole
• Terminations: 2-pin configuration
• Regulatory compliance: ROHS3 Compliant

All identified substitute parts meet these core electrical and mechanical requirements. Physical dimensions may vary within acceptable tolerances for axial component mounting. Operating temperature ranges and moisture resistance features are documented where applicable but do not restrict substitution eligibility when core parameters align.

Parameter Comparison

Engineering Selection Recommendations

All four parts—WW3AFTR100, 43FR10E, ALSR03R1000FE12, and RS02BR1000FE70—are electrically equivalent with identical resistance, tolerance, and power specifications. Selection among these parts should be based on:

• Packaging format availability: Tape & Reel, Bulk, or Cut Tape
• Physical dimensions: RS02BR1000FE70 and WW3AFTR100 share identical dimensions (0.187" Dia x 0.560" L), while 43FR10E and ALSR03R1000FE12 have minor dimensional variations
• Inventory availability and lead time requirements
• Regulatory compliance: All parts maintain ROHS3 compliance
• Moisture resistance features: WW3AFTR100, ALSR03R1000FE12, and RS02BR1000FE70 include moisture-resistant construction

Frequently Asked Questions (FAQ)

Q: Can 43FR10E replace WW3AFTR100 in my circuit? A: Yes. Both parts share identical electrical specifications (100 mOhms, ±1%, 3W, wirewound, axial). Physical dimensions differ slightly (43FR10E: 0.220" Dia x 0.594" L versus WW3AFTR100: 0.187" Dia x 0.560" L), which may affect PCB layout spacing but does not impact electrical performance.

Q: What is the difference between RS02BR1000FE70 and WW3AFTR100? A: These parts are dimensionally identical (0.187" Dia x 0.560" L) with matching electrical specifications. The primary difference is packaging format: WW3AFTR100 is supplied in Tape & Reel, while RS02BR1000FE70 is supplied in Cut Tape.

Q: Does ALSR03R1000FE12 have the same temperature coefficient as WW3AFTR100? A: WW3AFTR100 specifies ±90ppm/°C temperature coefficient. ALSR03R1000FE12 does not provide temperature coefficient data in available documentation. Both parts operate within specified temperature ranges and maintain ±1% tolerance.

Q: Are all substitute parts ROHS3 compliant? A: Yes. WW3AFTR100, 43FR10E, ALSR03R1000FE12, and RS02BR1000FE70 are all ROHS3 compliant.

Q: Which substitute part has the best inventory availability? A: 43FR10E (Ohmite) has the highest inventory at 24594 units. ALSR03R1000FE12 has 5682 units, and RS02BR1000FE70 has 2045 units.