Ohmite 41FR50 Equivalent & Substitute Parts

Part Overview

The Ohmite 41FR50 is a 500 mOhms ±1% 1W through-hole resistor with axial wirewound construction, rated for operating temperatures from -55°C to 275°C. This component is classified as active and currently in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter set: resistance value, tolerance, power rating, composition type, temperature coefficient, package style, and termination count.

Substiute Parts

41FR50

OhmiteIn Stock: 79041FR50 Datasheet

Current PartRFQ

41FR50E

OhmiteIn Stock: 106741FR50E Datasheet

DirectRFQ

41FR50E

OhmiteIn Stock: 106741FR50E Datasheet

DirectRFQ

ALSR01R5000FE12

Vishay DaleIn Stock: 735ALSR01R5000FE12 Datasheet

DirectRFQ

RS01AR5000FS70

Vishay DaleIn Stock: 1869RS01AR5000FS70 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following core parameters: resistance value (500 mOhms), tolerance (±1%), power rating (1W), wirewound composition, temperature coefficient (±90ppm/°C), axial package configuration, and two-terminal design. Parts meeting these criteria are classified as direct equivalents regardless of packaging format (box, bulk, or cut tape) or minor dimensional variations within the axial envelope. Compliance status and operating temperature range extensions are noted but do not disqualify substitution when electrical and mechanical parameters align.

Parameter Comparison

Engineering Selection Recommendations

All four parts meet the core electrical and mechanical substitution criteria. Selection between them is determined by compliance requirements and operating environment constraints:

The Ohmite 41FR50E offers RoHS compliance with identical electrical specifications to the main part, differing only in packaging format (bulk versus box). This part is suitable for applications requiring regulatory compliance without thermal range compromise.

The Vishay Dale ALSR01R5000FE12 provides ROHS3 compliance and moisture-resistant construction. Operating temperature range is -65°C to 250°C, which covers the lower extreme but does not extend to the 275°C upper limit of the main part. This part is appropriate for applications requiring enhanced moisture resistance and lower-temperature operation within compliant frameworks.

The Vishay Dale RS01AR5000FS70 maintains non-compliant status with the main part and operates within -65°C to 250°C. This part is functionally equivalent but does not provide compliance advantages. Selection is justified only when inventory availability or supply chain factors necessitate substitution.

Frequently Asked Questions (FAQ)

Q: Can 41FR50E replace 41FR50 in all applications?

A: Yes. Both parts share identical electrical specifications (500 mOhms ±1%, 1W, ±90ppm/°C) and axial wirewound construction. The difference is packaging format (bulk versus box) and RoHS compliance status. Electrical performance and thermal characteristics are equivalent.

Q: What is the difference between Ohmite and Vishay Dale substitutes?

A: Ohmite 41FR50E is a direct manufacturer equivalent with identical series designation and operating temperature range. Vishay Dale parts (ALSR01R5000FE12 and RS01AR5000FS70) are cross-manufacturer substitutes with equivalent electrical parameters but different physical dimensions, moisture-resistant features, and operating temperature limits (-65°C to 250°C versus -55°C to 275°C).

Q: Does operating temperature range affect substitution eligibility?

A: Operating temperature range does not disqualify substitution when core electrical parameters match. However, applications requiring operation above 250°C are limited to the main part (41FR50) or 41FR50E. Applications operating below -55°C are compatible with all Vishay Dale alternatives.

Q: What packaging formats are available?

A: The main part 41FR50 is supplied in box packaging. The 41FR50E is supplied in bulk. Vishay Dale ALSR01R5000FE12 is supplied in bulk. Vishay Dale RS01AR5000FS70 is supplied in cut tape (CT) format. All maintain identical axial wirewound construction and electrical specifications.

Q: Are there compliance differences between substitutes?

A: Yes. The 41FR50E is RoHS compliant. The ALSR01R5000FE12 is ROHS3 compliant. The main part 41FR50 and RS01AR5000FS70 are RoHS non-compliant. Applications subject to RoHS requirements must use 41FR50E or ALSR01R5000FE12.