RWR89SR511FSRSL Equivalent & Substitute Parts

Part Overview

The RWR89SR511FSRSL is a 511 mOhms ±1% 3W through-hole wirewound axial resistor manufactured by Vishay Dale, qualified to military standard MIL-PRF-39007. This component is designed for applications requiring precision low-resistance values with high power dissipation capability in harsh environments. The part is currently active in production with 900 pieces available in stock. Substitute parts are identified when equivalent electrical and mechanical specifications are maintained within the allowed parameter tolerances for this resistor category.

Substiute Parts

RWR89SR511FSRSL

Vishay DaleIn Stock: 996RWR89SR511FSRSL Datasheet

Current PartRFQ

RWR89SR511FRRSL

Vishay DaleIn Stock: 1314RWR89SR511FRRSL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the RWR89SR511FSRSL is determined by strict equivalence across the following critical parameters:

• Resistance value: 511 mOhms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package: Axial
• Temperature coefficient: ±400ppm/°C
• Operating temperature range: -55°C to 250°C
• Military qualification: MIL-PRF-39007
• Moisture resistance: Required

The RWR89SR511FRRSL meets all these criteria and is classified as a direct substitute. The difference between the main part and substitute lies in the failure rate specification and inventory availability, not in functional or mechanical performance.

Parameter Comparison

Engineering Selection Recommendations

Both the RWR89SR511FSRSL and RWR89SR511FRRSL are active production parts manufactured by Vishay Dale to MIL-PRF-39007 military specifications. Selection between these parts should be based on failure rate requirements and inventory availability for your application timeline.

The RWR89SR511FSRSL carries a failure rate of S (0.001%), suitable for applications with stringent reliability requirements. The RWR89SR511FRRSL carries a failure rate of R (0.01%), appropriate for standard military applications. Both parts maintain identical electrical performance, mechanical dimensions, and environmental operating characteristics. Compliance status is equivalent across both parts: RoHS non-compliant, REACH Affected, and EAR99 classification.

Frequently Asked Questions (FAQ)

Q: Can RWR89SR511FRRSL be used as a direct replacement for RWR89SR511FSRSL?

A: Yes. Both parts are electrically and mechanically identical across all functional parameters: 511 mOhms resistance, ±1% tolerance, 3W power rating, wirewound composition, axial package, and military MIL-PRF-39007 qualification. The difference is the failure rate specification.

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. Selection depends on your application's reliability requirements. Both are qualified military-grade specifications.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.187" diameter by 0.560" length (4.75mm x 14.22mm) and use identical axial packaging in tape and reel format.

Q: Do both parts meet the same environmental specifications?

A: Yes. Both operate across -55°C to 250°C with ±400ppm/°C temperature coefficient, moisture resistance, and identical compliance certifications.

Q: Which part should I select if both are available?

A: Selection is based on your specific failure rate requirement and supply chain timing. If your application requires the lower failure rate specification, use RWR89SR511FSRSL. If standard military failure rate is acceptable, RWR89SR511FRRSL offers higher current inventory availability.