RWR89SR511FSS73 Equivalent & Substitute Parts

Part Overview

The RWR89SR511FSS73 is a 511 mOhms ±1% 3W through-hole wirewound resistor in axial package configuration, manufactured by Vishay Dale. This component is part of the Military MIL-PRF-39007 series and features moisture-resistant construction suitable for demanding applications requiring high reliability and precision. The part is currently active in production with 932 pieces available in stock. Substitute parts are identified when inventory constraints, lead time requirements, or supply chain considerations necessitate alternative sourcing while maintaining identical electrical and mechanical specifications.

Substiute Parts

RWR89SR511FSS73

Vishay DaleIn Stock: 951RWR89SR511FSS73 Datasheet

Current PartRFQ

RWR89SR511FRRSL

Vishay DaleIn Stock: 1314RWR89SR511FRRSL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RWR89SR511FSS73 is determined by strict equivalence across the following critical parameters:

• Resistance value: 511 mOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 3W (exact match required)
• Composition: Wirewound (exact match required)
• Package configuration: Axial (exact match required)
• Temperature coefficient: ±400ppm/°C (exact match required)
• Operating temperature range: -55°C to 250°C (exact match required)
• Physical dimensions: 0.187" Dia × 0.560" L (exact match required)
• Military series compliance: MIL-PRF-39007 (exact match required)

The identified substitute part RWR89SR511FRRSL meets all electrical and mechanical parameters. Differences in failure rate classification and packaging designation do not affect functional interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both RWR89SR511FSS73 and RWR89SR511FRRSL are active production components manufactured by Vishay Dale with identical electrical and mechanical specifications. Selection between these parts should be based on:

• Inventory availability and lead time requirements
• Failure rate classification requirements for specific applications (S-level vs. R-level)
• Supply chain continuity and procurement strategy

Both parts maintain full compliance with MIL-PRF-39007 military specifications, RoHS non-compliance status, and REACH regulatory requirements. Physical interchangeability is complete, with no modifications to PCB layout, footprint, or circuit design required for substitution.

Frequently Asked Questions (FAQ)

Q: Can RWR89SR511FRRSL be used as a direct replacement for RWR89SR511FSS73?

A: Yes. Both parts are electrically and mechanically identical across all critical parameters including resistance value, tolerance, power rating, temperature coefficient, operating temperature range, and physical dimensions. Substitution requires no circuit modifications.

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

A: Failure rate S (0.001%) represents a lower failure rate specification than R (0.01%). Selection depends on application reliability requirements. Both classifications meet MIL-PRF-39007 military standards.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts measure 0.187" diameter × 0.560" length (4.75mm × 14.22mm) in axial configuration. PCB footprint and mounting requirements are identical.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both parts share identical RoHS non-compliance status, REACH Affected designation, and ECCN/HTSUS classifications. Military series compliance (MIL-PRF-39007) is identical.

Q: What packaging format is used for both parts?

A: Both parts are supplied in Tape & Reel (TR) format suitable for automated assembly processes.