WW3FT500R Equivalent & Substitute Parts

Part Overview

The WW3FT500R is a 500 Ohm, 1% tolerance, 3W axial wirewound through-hole resistor manufactured by Stackpole Electronics Inc. This component is classified as Active product status with moisture-resistant construction suitable for applications requiring precision resistance in high-power environments. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and environmental performance characteristics.

Substiute Parts

WW3FT500R

Stackpole Electronics IncIn Stock: 2601WW3FT500R Datasheet

Current PartRFQ

43F500E

OhmiteIn Stock: 124243F500E Datasheet

MFR RecommendedRFQ

RS02B500R0FE70

Vishay DaleIn Stock: 3208RS02B500R0FE70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WW3FT500R are qualified based on the following critical parameters:

• Resistance value: 500 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package configuration: Axial with 2 terminations
• Temperature coefficient: ±20ppm/°C

Both identified substitutes meet these core electrical and mechanical requirements. Variations in physical dimensions, operating temperature ranges, and packaging formats (Cut Tape vs. Bulk) do not affect functional interchangeability in standard circuit applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain Active product status and meet RoHS compliance requirements. The WW3FT500R and RS02B500R0FE70 share identical physical dimensions (0.187" Dia x 0.560" L), making them direct mechanical substitutes with no PCB layout modifications required. The 43F500E exhibits slightly larger dimensions (0.220" Dia x 0.594" L) and should be evaluated for space constraints in compact designs.

The WW3FT500R and RS02B500R0FE70 both feature moisture-resistant construction and ROHS3 compliance with REACH Unaffected status. The 43F500E carries RoHS compliance with MSL rating of 1 (Unlimited) and REACH status listed as Vendor Undefined.

Selection should prioritize dimensional compatibility with existing PCB layouts and supply chain availability. All three parts are electrically equivalent for standard circuit applications requiring 500 Ohm, 3W, ±1% tolerance resistors.

Frequently Asked Questions (FAQ)

Q: Can the 43F500E be used as a direct replacement for the WW3FT500R in existing designs?

A: The 43F500E is electrically equivalent but has larger physical dimensions (0.220" Dia x 0.594" L versus 0.187" Dia x 0.560" L). PCB layout verification is required to confirm adequate spacing before substitution.

Q: What is the primary difference between the WW3FT500R and RS02B500R0FE70?

A: Both parts share identical electrical specifications and physical dimensions. The primary difference is manufacturer (Stackpole vs. Vishay Dale) and operating temperature range (WW3FT500R: -55°C ~ 350°C; RS02B500R0FE70: -65°C ~ 250°C). Selection depends on application temperature requirements and supply availability.

Q: Are all three parts RoHS compliant?

A: Yes. The WW3FT500R and RS02B500R0FE70 are ROHS3 Compliant. The 43F500E is RoHS Compliant. All three meet RoHS requirements for new designs.

Q: What packaging formats are available?

A: The WW3FT500R and RS02B500R0FE70 are supplied in Cut Tape (CT) packaging. The 43F500E is supplied in Bulk packaging. Packaging selection depends on production volume and handling requirements.

Q: Are moisture-resistant features available across all substitutes?

A: The WW3FT500R and RS02B500R0FE70 both feature moisture-resistant construction. The 43F500E does not list moisture-resistant features in the provided specifications.