ROX1SF10R Equivalent & Substitute Parts

Part Overview

The ROX1SF10R is a 10 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 applications requiring high reliability and safety compliance. The product is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs.

Substiute Parts

ROX1SF10R

TE Connectivity Passive ProductIn Stock: 1097ROX1SF10R Datasheet

Current PartRFQ

FMF1WSFRF52-10R

YAGEOIn Stock: 717FMF1WSFRF52-10R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROX1SF10R is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 10 Ohms (exact match required)
• Tolerance: ±1% (ensures precision equivalent to original)
• Power rating: 1W (maintains thermal performance requirements)

Mechanical Parameters:

• Package type: Axial (ensures physical compatibility with PCB layouts and through-hole mounting)
• Number of terminations: 2 (maintains connection point compatibility)

Functional Parameters:

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

The substitute part FMF1WSFRF52-10R meets all critical electrical and mechanical parameters. While the substitute uses metal film composition instead of metal oxide film, and exhibits different temperature coefficient and operating temperature specifications, these differences remain within acceptable substitution criteria for the specified resistance, tolerance, and power rating classification.

Parameter Comparison

Engineering Selection Recommendations

The FMF1WSFRF52-10R from YAGEO is a direct functional equivalent for the obsolete ROX1SF10R. Selection of this substitute is based on the following engineering criteria:

Electrical Equivalence: Both components provide identical resistance (10 Ohms) and tolerance (±1%) specifications, ensuring circuit performance remains unchanged.

Mechanical Compatibility: Both components utilize axial through-hole packaging with two terminations, permitting direct physical substitution in existing PCB designs without layout modification.

Compliance Status: The FMF1WSFRF52-10R carries active product status with ROHS3 compliance and REACH unaffected designation, supporting current regulatory requirements for new production and system updates.

Thermal Performance: The substitute component offers an extended operating temperature range (-55°C ~ 155°C versus -55°C ~ 130°C) and superior temperature coefficient stability (±100ppm/°C versus ±350ppm/°C), providing enhanced performance margins in temperature-sensitive applications.

Safety Certification: Both components maintain flame-proof and safety certifications required for regulated applications.

Frequently Asked Questions (FAQ)

Q: Can the FMF1WSFRF52-10R be used as a direct replacement for the ROX1SF10R in existing designs?

A: Yes. Both components share identical resistance value (10 Ohms), tolerance (±1%), power rating (1W), and axial through-hole package configuration. Direct substitution is mechanically and electrically compatible without circuit redesign.

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

A: Metal oxide film and metal film are distinct resistor construction technologies. The ROX1SF10R uses metal oxide film construction, while the FMF1WSFRF52-10R uses metal film construction. Both achieve the specified 10 Ohm resistance and ±1% tolerance. The metal film composition in the substitute provides improved temperature coefficient performance (±100ppm/°C versus ±350ppm/°C).

Q: Does the FMF1WSFRF52-10R meet safety and compliance requirements?

A: Yes. The FMF1WSFRF52-10R maintains flame-proof and safety certifications equivalent to the original component. Additionally, it carries ROHS3 compliance and REACH unaffected status, supporting current regulatory frameworks.

Q: Are there physical dimension differences between these components?

A: Minor dimensional variations exist. The ROX1SF10R measures 0.138" Dia x 0.394" L (3.50mm x 10.00mm), while the FMF1WSFRF52-10R measures 0.130" Dia x 0.354" L (3.30mm x 9.00mm). These differences are within standard axial resistor tolerance ranges and do not affect PCB mounting compatibility.

Q: What is the packaging difference between the two components?

A: The ROX1SF10R is supplied in standard packaging, while the FMF1WSFRF52-10R is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for automated assembly processes and does not affect component performance or compatibility.

Q: Why is the ROX1SF10R listed as obsolete?

A: Product obsolescence indicates that TE Connectivity Passive Product has discontinued manufacturing this component. The FMF1WSFRF52-10R provides functional continuity for applications requiring 10 Ohm, 1W, ±1% tolerance axial resistors with equivalent electrical and mechanical specifications.