40F1K5E Equivalent & Substitute Parts Reference

Part Overview

The 40F1K5E is a 1.5 kOhms ±1% 10W through-hole resistor manufactured by Ohmite in the Ohmicone® 40 series. This axial wirewound resistor is designed for applications requiring precision resistance with high power dissipation capability. The part is currently active in production with full RoHS compliance. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to inventory constraints, supply chain considerations, or application-specific packaging preferences.

Substiute Parts

40F1K5E

OhmiteIn Stock: 81440F1K5E Datasheet

Current PartRFQ

RS0101K500FE73

Vishay DaleIn Stock: 2679RS0101K500FE73 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The RS0101K500FE73 manufactured by Vishay Dale qualifies as a direct substitute for the 40F1K5E based on the following critical parameters:

• Resistance value: 1.5 kOhms (identical)
• Tolerance: ±1% (identical)
• Power rating: 10W (identical)
• Composition: Wirewound (identical)
• Package: Axial (identical)
• Temperature coefficient: ±20ppm/°C (identical)
• Termination count: 2 (identical)
• RoHS compliance: Both parts meet RoHS requirements

Physical dimensions vary slightly between the two parts. The RS0101K500FE73 features moisture-resistant construction, which provides additional environmental protection compared to the standard 40F1K5E specification.

Parameter Comparison

Engineering Selection Recommendations

Both the 40F1K5E and RS0101K500FE73 are active production parts with full RoHS compliance. Selection between these parts should be based on:

• Thermal operating range requirements: The 40F1K5E supports operation to 275°C, while the RS0101K500FE73 is rated to 250°C. Applications requiring extended high-temperature operation favor the 40F1K5E.
• Environmental protection: The RS0101K500FE73 includes moisture-resistant construction, suitable for applications with humidity exposure.
• Physical space constraints: The RS0101K500FE73 has a smaller diameter (0.375" vs 0.406") and shorter length (1.780" vs 1.902"), which may be advantageous in compact layouts.
• Packaging format: The 40F1K5E is supplied in box packaging, while the RS0101K500FE73 is supplied in cut tape format. Packaging selection depends on assembly process requirements.

Frequently Asked Questions (FAQ)

Q: Can the RS0101K500FE73 replace the 40F1K5E in all applications?

A: The RS0101K500FE73 is electrically equivalent for applications operating within -65°C to 250°C. Applications requiring operation above 250°C must use the 40F1K5E, which is rated to 275°C.

Q: What is the significance of the moisture-resistant feature on the RS0101K500FE73?

A: Moisture-resistant construction provides enhanced protection in humid or corrosive environments. This feature is not specified for the 40F1K5E standard version.

Q: Are the physical dimensions interchangeable?

A: While both parts are axial wirewound resistors with identical electrical specifications, physical dimensions differ. The RS0101K500FE73 is slightly smaller. PCB layout and mechanical clearances must be verified before substitution.

Q: What packaging considerations apply to these parts?

A: The 40F1K5E is supplied in box packaging suitable for manual assembly or bulk handling. The RS0101K500FE73 is supplied in cut tape format, which is optimized for automated pick-and-place assembly processes.

Q: Are both parts RoHS compliant?

A: Yes. The 40F1K5E meets RoHS compliance standards. The RS0101K500FE73 meets ROHS3 compliance, which represents the current RoHS directive revision.