FRM3WSJR-73-75R Equivalent & Substitute Parts

Part Overview

The FRM3WSJR-73-75R is a 75 Ohm, 3W axial through-hole resistor manufactured by YAGEO with metal film composition. This component features flame-proof and fusible safety characteristics, designed for applications requiring reliable current-limiting or load resistance in high-temperature environments. The part is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

FRM3WSJR-73-75R

YAGEOIn Stock: 1081FRM3WSJR-73-75R Datasheet

Current PartRFQ

FKN3WSJR-73-75R

YAGEOIn Stock: 990FKN3WSJR-73-75R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FRM3WSJR-73-75R is determined by the following critical parameters:

• Resistance value: 75 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 3W (exact match required)
• Package configuration: Axial through-hole (exact match required)
• Physical dimensions: 0.197" Dia x 0.610" L (exact match required)
• Safety features: Flame Proof, Fusible, Safety (required)
• Operating temperature range: Must encompass or match the original specification

The FKN3WSJR-73-75R qualifies as a direct substitute based on these parameters. While composition differs (wirewound versus metal film), both configurations meet the electrical and mechanical requirements for this application category.

Parameter Comparison

Engineering Selection Recommendations

The FKN3WSJR-73-75R is the designated manufacturer-recommended substitute for the obsolete FRM3WSJR-73-75R. Selection of this alternative is supported by:

• Identical electrical specifications (75 Ohms, ±5%, 3W)
• Matching mechanical form factor and dimensions
• Preservation of all safety-critical features (flame proof, fusible, safety)
• Active product status ensuring continued availability
• ROHS3 compliance for regulatory alignment
• Equivalent moisture sensitivity rating

The operating temperature range of the substitute (-40°C ~ 155°C) encompasses the critical upper limit of the original specification. Applications operating below -40°C require evaluation against specific circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the FKN3WSJR-73-75R be used as a direct replacement in existing designs?

A: Yes. The substitute maintains identical resistance, tolerance, power rating, package type, and physical dimensions. All safety features are preserved. Direct substitution is supported for applications within the -40°C ~ 155°C operating range.

Q: What is the difference between metal film and wirewound composition?

A: Both compositions meet the specified electrical and safety requirements for this application. Composition differences do not affect substitution eligibility when all other parameters match.

Q: Does the substitute meet current regulatory requirements?

A: The FKN3WSJR-73-75R is ROHS3 compliant, meeting current regulatory standards. The original FRM3WSJR-73-75R compliance status was not specified in available documentation.

Q: Are there packaging differences between the original and substitute?

A: The original is supplied in bulk packaging. The substitute is available in Tape & Reel (TR) format, which is standard for active production components. Physical dimensions and form factor remain identical.

Q: What is the minimum operating temperature consideration?

A: The substitute operates from -40°C, compared to the original's -55°C minimum. Applications requiring operation below -40°C must be evaluated against specific circuit thermal requirements.