RS00540R00FS73 Equivalent & Substitute Parts

Part Overview

The RS00540R00FS73 is a 40 Ohm, 5W wirewound axial resistor manufactured by Vishay Dale with ±1% tolerance and moisture-resistant construction. This component is designed for through-hole applications requiring precision power dissipation in industrial and electronic equipment. The part maintains Active product status with 1043 units currently in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part becomes unavailable or when design requirements permit alternative sourcing.

Substiute Parts

RS00540R00FS73

Vishay DaleIn Stock: 1065RS00540R00FS73 Datasheet

Current PartRFQ

45F40R

OhmiteIn Stock: 114645F40R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RS00540R00FS73 is determined by strict equivalence across the following critical parameters:

• Resistance value: 40 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 5W (exact match required)
• Composition: Wirewound (exact match required)
• Package configuration: Axial through-hole (exact match required)
• Temperature coefficient: ±20ppm/°C (exact match required)
• Number of terminations: 2 (exact match required)

The substitute part 45F40R manufactured by Ohmite meets all critical electrical and mechanical parameters, establishing it as a direct equivalent. Both parts share identical resistance, tolerance, power dissipation capability, wirewound construction, and axial package configuration. Physical dimensions vary slightly but remain compatible with standard through-hole PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

Both the RS00540R00FS73 and 45F40R are Active products with equivalent electrical specifications and wirewound axial construction. Selection between these parts should be based on:

Packaging requirements: The RS00540R00FS73 is supplied in Tape & Reel format suitable for automated assembly, while the 45F40R is available in Bulk packaging. Choose based on production volume and assembly methodology.

Physical dimensions: The 45F40R exhibits slightly larger diameter (0.343" vs 0.312") and length (0.937" vs 0.875"). Verify PCB layout clearances and mounting constraints before substitution.

Compliance status: Both parts are RoHS non-compliant and REACH Affected, with identical ECCN (EAR99) and HTSUS (8533.21.0080) classifications. No compliance advantage exists between the two options.

Inventory availability: Current stock levels are comparable (1043 units for RS00540R00FS73, 1039 units for 45F40R), supporting either selection for immediate procurement.

Frequently Asked Questions (FAQ)

Q: Can the 45F40R directly replace the RS00540R00FS73 in existing designs?

A: Yes, provided PCB layout accommodates the slightly larger physical dimensions of the 45F40R (0.343" Dia x 0.937" L versus 0.312" Dia x 0.875" L). All electrical parameters are identical, including resistance, tolerance, power rating, and temperature coefficient.

Q: What is the significance of the different packaging formats (Tape & Reel vs Bulk)?

A: Tape & Reel packaging is optimized for high-volume automated assembly processes, while Bulk packaging is suitable for manual assembly or lower-volume applications. The choice depends on production methodology rather than component performance.

Q: Are there any compliance differences between these parts?

A: No. Both parts share identical RoHS non-compliant status, REACH Affected designation, EAR99 ECCN classification, and HTSUS code 8533.21.0080.

Q: What parameters must remain constant for substitution eligibility?

A: Resistance (40 Ohms), tolerance (±1%), power rating (5W), composition (wirewound), package type (axial), temperature coefficient (±20ppm/°C), and number of terminations (2) must all match exactly.

Q: Can these parts be used in applications requiring RoHS compliance?

A: No. Both the RS00540R00FS73 and 45F40R are RoHS non-compliant and unsuitable for applications with RoHS compliance requirements.