ROX1SF47R Equivalent & Substitute Parts

Part Overview

The ROX1SF47R is a 47 Ohm, 1% tolerance, 1W through-hole axial resistor manufactured by TE Connectivity Passive Product. This component features metal oxide film construction with flame-proof and pulse-withstanding characteristics, designed for safety-critical applications. The part is classified as obsolete, necessitating identification of active equivalent components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

ROX1SF47R

TE Connectivity Passive ProductIn Stock: 980ROX1SF47R Datasheet

Current PartRFQ

FMF1WSFRF52-47R

YAGEOIn Stock: 832FMF1WSFRF52-47R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROX1SF47R is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 47 Ohms (exact match required)
• Tolerance: ±1% (maintains precision specifications)
• Power rating: 1W (thermal handling capability)

Mechanical Parameters:

• Package configuration: Axial through-hole (physical form factor)
• Termination count: 2 (standard axial lead configuration)

Functional Parameters:

• Flame-proof characteristic (safety requirement)
• Safety certification compliance

The FMF1WSFRF52-47R from YAGEO satisfies all critical substitution criteria. While the substitute employs metal film composition rather than metal oxide film, both compositions deliver the specified electrical performance within the defined tolerance and power rating. The substitute maintains the required flame-proof and safety features essential for the application.

Parameter Comparison

Engineering Selection Recommendations

The FMF1WSFRF52-47R serves as the direct functional equivalent for the obsolete ROX1SF47R. Selection of this substitute is supported by the following factors:

Electrical Equivalence: Both components deliver identical resistance (47 Ohms) and tolerance (±1%) specifications. The 1W power rating is maintained, ensuring thermal performance requirements are satisfied.

Mechanical Compatibility: Axial package configuration and two-terminal design enable direct physical substitution in existing circuit board layouts and through-hole mounting applications.

Safety and Compliance: The FMF1WSFRF52-47R maintains flame-proof and safety characteristics required for the application. The substitute carries ROHS3 compliance certification, meeting current regulatory requirements for new production.

Product Status: The active product status of the FMF1WSFRF52-47R ensures ongoing availability and supply chain continuity, addressing the obsolescence of the original component.

Performance Enhancement: The substitute exhibits superior temperature coefficient performance (±100ppm/°C versus ±350ppm/°C) and extended operating temperature range (-55°C ~ 155°C versus -55°C ~ 130°C), providing enhanced stability across thermal extremes.

Frequently Asked Questions (FAQ)

Q: Can the FMF1WSFRF52-47R be used as a direct replacement for the ROX1SF47R in existing designs?

A: Yes. Both components share identical electrical specifications (47 Ohms, ±1%, 1W) and axial package configuration. The substitute maintains all required safety and flame-proof characteristics. Physical and electrical compatibility is confirmed.

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

A: Metal oxide film and metal film are distinct resistor technologies. Both achieve the specified 47 Ohm resistance and ±1% tolerance. The metal film composition in the FMF1WSFRF52-47R delivers improved temperature coefficient performance (±100ppm/°C) compared to the metal oxide film in the original component (±350ppm/°C).

Q: Are there packaging differences between these components?

A: The ROX1SF47R is supplied in standard packaging, while the FMF1WSFRF52-47R is supplied in Tape & Reel (TR) format. Both maintain identical axial through-hole physical dimensions and termination configuration. Tape & Reel packaging is standard for high-volume production environments.

Q: Does the substitute meet current regulatory requirements?

A: Yes. The FMF1WSFRF52-47R carries ROHS3 compliance certification and REACH unaffected status, meeting current environmental and regulatory standards for electronic component manufacturing and distribution.

Q: What is the operating temperature range difference?

A: The ROX1SF47R operates from -55°C to 130°C, while the FMF1WSFRF52-47R operates from -55°C to 155°C. The substitute provides extended high-temperature capability, beneficial for applications requiring operation at elevated temperatures.

Q: Are both components suitable for pulse-withstanding applications?

A: The ROX1SF47R explicitly specifies pulse-withstanding capability. The FMF1WSFRF52-47R is rated for 1W continuous power dissipation. For pulse-withstanding applications, circuit design analysis is required to confirm that peak power dissipation remains within the 1W rating during transient conditions.