WW3FT200R Equivalent & Substitute Parts

Part Overview

The WW3FT200R is a 200 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 circuits. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and environmental operating parameters to ensure direct functional replacement in circuit designs.

Substiute Parts

WW3FT200R

Stackpole Electronics IncIn Stock: 2142WW3FT200R Datasheet

Current PartRFQ

43F200E

OhmiteIn Stock: 107843F200E Datasheet

MFR RecommendedRFQ

RS02B200R0FE70

Vishay DaleIn Stock: 3362RS02B200R0FE70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WW3FT200R are qualified based on the following criteria:

Electrical Parameters (Critical):

• Resistance value: 200 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Temperature coefficient: ±20ppm/°C

Mechanical Parameters (Critical):

• Package type: Axial
• Number of terminations: 2
• Physical form factor: Through-hole

Environmental & Compliance Parameters:

• RoHS compliance status
• Operating temperature range compatibility
• Composition: Wirewound

All identified substitutes meet or exceed the core electrical and mechanical specifications of the WW3FT200R. Variations in physical dimensions and maximum operating temperature are noted but do not preclude functional equivalence in standard applications.

Parameter Comparison

Engineering Selection Recommendations

WW3FT200R (Stackpole Electronics Inc) — Primary specification. ROHS3 compliant. Moisture-resistant construction. Operating range -55°C ~ 350°C. Recommended for applications requiring maximum thermal performance and moisture protection.

43F200E (Ohmite) — Functionally equivalent. RoHS compliant. Operating range -55°C ~ 275°C. Physical dimensions larger (0.220" Dia x 0.594" L). Suitable for applications where thermal performance ceiling of 275°C is acceptable and board space permits larger component footprint.

RS02B200R0FE70 (Vishay Dale) — Functionally equivalent. ROHS3 compliant. Moisture-resistant construction. Operating range -65°C ~ 250°C. Identical physical dimensions to primary part (0.187" Dia x 0.560" L). Suitable for applications requiring extended low-temperature performance to -65°C and moisture resistance.

Selection between substitutes depends on application-specific thermal requirements and available board space. All three parts satisfy core electrical specifications and standard operating conditions.

Frequently Asked Questions (FAQ)

Q: Can 43F200E replace WW3FT200R in all applications? A: 43F200E meets all electrical specifications and is mechanically compatible. The operating temperature maximum is 275°C versus 350°C for WW3FT200R. Applications operating below 275°C experience no functional difference. Physical dimensions are larger; verify PCB layout accommodates 0.220" diameter component.

Q: What is the difference between WW3FT200R and RS02B200R0FE70? A: Both parts share identical electrical specifications (200 Ohms, ±1%, 3W, ±20ppm/°C) and physical dimensions (0.187" Dia x 0.560" L). RS02B200R0FE70 operates to -65°C minimum versus -55°C for WW3FT200R. Both are moisture-resistant and ROHS3 compliant. Selection depends on low-temperature requirement.

Q: Are all substitutes moisture-resistant? A: WW3FT200R and RS02B200R0FE70 are specified as moisture-resistant. 43F200E does not list moisture-resistant features. For applications requiring moisture protection, WW3FT200R or RS02B200R0FE70 are appropriate selections.

Q: Can these parts be used interchangeably on the same PCB? A: WW3FT200R and RS02B200R0FE70 have identical footprints and can be directly substituted. 43F200E has a larger diameter (0.220" versus 0.187") and may require PCB layout modification depending on component spacing constraints.

Q: What compliance certifications apply to all three parts? A: All three parts are RoHS compliant. WW3FT200R and RS02B200R0FE70 are ROHS3 compliant. All carry EAR99 ECCN classification. REACH status: WW3FT200R and RS02B200R0FE70 are REACH Unaffected; 43F200E is Vendor Undefined.