RS01AR2500FS70 Equivalent & Substitute Parts

Part Overview

The RS01AR2500FS70 is a 250 mOhms ±1% 1W through-hole axial wirewound resistor manufactured by Vishay Dale. This moisture-resistant component is designed for applications requiring precision low-resistance dissipation in compact form factors. The part is currently active in production with 868 units in stock. Substitute parts are necessary to address packaging format preferences, compliance requirements, or inventory availability across different distribution channels.

Substiute Parts

RS01AR2500FS70

Vishay DaleIn Stock: 935RS01AR2500FS70 Datasheet

Current PartRFQ

RS01AR2500FE70

Vishay DaleIn Stock: 2137RS01AR2500FE70 Datasheet

DirectRFQ

41FR25

OhmiteIn Stock: 101741FR25 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RS01AR2500FS70 is determined by the following core parameters: resistance value (250 mOhms), tolerance (±1%), power rating (1W), composition (wirewound), and package type (axial). All substitute parts must maintain these electrical and mechanical specifications to ensure functional equivalence in circuit applications.

The identified substitutes are grouped as follows:

Direct Packaging Variant (Vishay Dale RS01AR2500FE70): Identical electrical specifications and physical dimensions to the main part, differing only in packaging format (Cut Tape versus Tape & Reel).

Cross-Manufacturer Equivalent (Ohmite 41FR25): Meets all core electrical parameters and axial package requirements. Physical dimensions vary slightly (0.126" Dia x 0.437" L versus 0.094" Dia x 0.406" L), which may affect board layout considerations but does not impact electrical performance for standard through-hole applications.

Parameter Comparison

Engineering Selection Recommendations

RS01AR2500FE70 (Vishay Dale): This substitute is electrically and mechanically identical to the main part with identical physical dimensions. Selection of this variant is appropriate when Cut Tape packaging is preferred over Tape & Reel format, or when ROHS3 compliance is required. Higher inventory availability (2054 units) supports consistent supply chain access.

41FR25 (Ohmite): This cross-manufacturer substitute maintains all core electrical specifications and axial package configuration. Physical dimensions are larger (0.126" Dia x 0.437" L), which requires verification of board layout clearance before implementation. Selection is appropriate for applications where cross-manufacturer sourcing is acceptable and Ohmite supply chain access is preferred. Temperature coefficient specification (±90ppm/°C) is provided for this part, whereas the Vishay Dale variants do not specify this parameter.

Frequently Asked Questions (FAQ)

Q: Can RS01AR2500FE70 be used as a direct replacement for RS01AR2500FS70?

A: Yes. Both parts are manufactured by Vishay Dale with identical electrical specifications (250 mOhms ±1%, 1W), composition (wirewound), and physical dimensions (0.094" Dia x 0.406" L). The only difference is packaging format: RS01AR2500FS70 is supplied in Tape & Reel format, while RS01AR2500FE70 is supplied in Cut Tape format.

Q: What are the physical dimension differences between the Vishay Dale and Ohmite parts?

A: The Vishay Dale RS01AR2500FS70 and RS01AR2500FE70 measure 0.094" Dia x 0.406" L (2.39mm x 10.31mm). The Ohmite 41FR25 measures 0.126" Dia x 0.437" L (3.20mm x 11.10mm). The Ohmite part is larger in both diameter and length. Board layout verification is required before substitution to ensure adequate clearance.

Q: Are there compliance differences between these parts?

A: Yes. The RS01AR2500FE70 is ROHS3 compliant, while both the RS01AR2500FS70 and 41FR25 are RoHS non-compliant. Selection depends on project compliance requirements. The RS01AR2500FS70 is REACH Affected, while the RS01AR2500FE70 is REACH Unaffected.

Q: What packaging formats are available?

A: RS01AR2500FS70 is supplied in Tape & Reel (TR) format with 868 units in stock. RS01AR2500FE70 is supplied in Cut Tape (CT) format with 2054 units in stock. The Ohmite 41FR25 is supplied in Bulk format with 923 units in stock. Selection depends on assembly process requirements and inventory needs.

Q: Can the Ohmite 41FR25 be used in applications requiring the full -65°C ~ 250°C operating temperature range?

A: The operating temperature range for the Ohmite 41FR25 is not specified in the provided data. Verification with the manufacturer is required before implementation in applications requiring operation across the full -65°C ~ 250°C range specified for the Vishay Dale parts.