RWR81S2000FSBSL Equivalent & Substitute Parts

Part Overview

The RWR81S2000FSBSL is a 200 Ohms ±1% 1W through-hole resistor manufactured by Vishay Dale, designed for military and aerospace applications. This axial wirewound resistor features moisture-resistant construction and operates across the temperature range of -55°C to 250°C. The part is currently active in production with 1052 units in stock. Substitute parts are necessary to address supply chain continuity, inventory availability, and application-specific failure rate requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

RWR81S2000FSBSL

Vishay DaleIn Stock: 1122RWR81S2000FSBSL Datasheet

Current PartRFQ

RWR81S2000FRB12

Vishay DaleIn Stock: 869RWR81S2000FRB12 Datasheet

DirectRFQ

RWR81S2000FSB12

Vishay DaleIn Stock: 1009RWR81S2000FSB12 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RWR81S2000FSBSL is determined by strict equivalence across the following parameters:

• Resistance value: 200 Ohms
• Tolerance: ±1%
• Power rating: 1W
• Composition: Wirewound
• Package: Axial
• Temperature coefficient: ±20ppm/°C
• Operating temperature range: -55°C to 250°C
• Physical dimensions: 0.085" Dia x 0.250" L (2.16mm x 6.35mm)
• Series compliance: Military, MIL-PRF-39007, RWR81S
• Termination count: 2

The identified substitute parts RWR81S2000FRB12 and RWR81S2000FSB12 meet all electrical and mechanical requirements. Variations in failure rate classification do not affect functional substitutability within the same military specification series.

Parameter Comparison

Engineering Selection Recommendations

All three parts—RWR81S2000FSBSL, RWR81S2000FRB12, and RWR81S2000FSB12—are active military-grade components manufactured by Vishay Dale under MIL-PRF-39007 specification. They share identical electrical characteristics, physical dimensions, and environmental operating parameters.

Selection between these parts should be based on:

• Failure rate requirements: RWR81S2000FSBSL and RWR81S2000FSB12 both carry failure rate S (0.001%), while RWR81S2000FRB12 carries failure rate R (0.01%). Applications requiring lower failure rates should prioritize the S-rated variants.
• Supply chain availability: Current inventory levels are 1052 units (RWR81S2000FSBSL), 801 units (RWR81S2000FRB12), and 989 units (RWR81S2000FSB12).
• Regulatory compliance: All parts maintain identical RoHS non-compliant and REACH Affected status, with EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can RWR81S2000FRB12 be used as a direct replacement for RWR81S2000FSBSL?

A: Yes. Both parts are electrically and mechanically equivalent, meeting all MIL-PRF-39007 military specifications. The difference in failure rate classification (R vs. S) does not affect functional compatibility. Selection depends on application-specific reliability requirements.

Q: What is the difference between failure rate S and failure rate R?

A: Failure rate S is 0.001% per 1000 hours, while failure rate R is 0.01% per 1000 hours. For applications requiring higher reliability, the S-rated parts (RWR81S2000FSBSL and RWR81S2000FSB12) are preferred.

Q: Are all three parts suitable for the same PCB layout and footprint?

A: Yes. All three parts share identical axial package dimensions of 0.085" Dia x 0.250" L (2.16mm x 6.35mm) and two terminations, ensuring direct board-level compatibility without layout modifications.

Q: Do these parts have different environmental performance characteristics?

A: No. All three parts operate across the same temperature range (-55°C to 250°C), maintain identical temperature coefficient (±20ppm/°C), and feature moisture-resistant construction for military applications.

Q: What compliance considerations apply to these parts?

A: All three parts are RoHS non-compliant and REACH Affected, with EAR99 export classification. Regulatory compliance status is identical across all variants.