ROX1SF15K Equivalent & Substitute Parts

Part Overview

The ROX1SF15K is a 15 kOhms ±1% 1W through-hole resistor manufactured by TE Connectivity Passive Product. This axial metal oxide film resistor features flame-proof and pulse-withstanding characteristics, designed for safety-critical applications. The part is classified as obsolete, necessitating identification of equivalent substitute components that maintain functional and electrical compatibility while offering active product status and continued availability.

Substiute Parts

ROX1SF15K

TE Connectivity Passive ProductIn Stock: 968ROX1SF15K Datasheet

Current PartRFQ

FMF1WSFRF52-15K

YAGEOIn Stock: 942FMF1WSFRF52-15K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROX1SF15K is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 15 kOhms
• Tolerance: ±1%
• Power rating: 1W

Mechanical Parameters:

• Package configuration: Axial through-hole
• Number of terminations: 2
• Physical form factor compatibility

Safety & Compliance Parameters:

• Flame-proof rating
• Safety certification features
• ECCN and HTSUS classification alignment

The FMF1WSFRF52-15K from YAGEO meets these core substitution criteria. While composition differs (metal film versus metal oxide film), both materials satisfy the electrical and mechanical requirements for this application category. The substitute part maintains the same resistance, tolerance, power rating, and axial package configuration.

Parameter Comparison

Engineering Selection Recommendations

The FMF1WSFRF52-15K serves as a direct functional equivalent to the obsolete ROX1SF15K. Selection of this substitute is supported by the following factors:

Product Status: The FMF1WSFRF52-15K maintains active product status with current manufacturing and distribution, addressing the obsolescence of the original part.

Electrical Equivalence: Both parts deliver identical resistance (15 kOhms) and tolerance (±1%) specifications, ensuring circuit performance consistency.

Power Rating: The 1W power rating is maintained across both components, preserving thermal design margins.

Package Compatibility: Both parts utilize axial through-hole configuration with identical termination count, enabling direct mechanical substitution in existing PCB layouts.

Safety Compliance: Both components feature flame-proof and safety certifications, maintaining compliance with safety-critical application requirements.

Regulatory Alignment: Both parts share identical ECCN (EAR99) and HTSUS (8533.21.0090) classifications, ensuring consistent export and import compliance.

Inventory Availability: The substitute part is available in active stock (926 Pcs), providing supply chain continuity.

The FMF1WSFRF52-15K is suitable for direct replacement in applications where the ROX1SF15K was previously specified.

Frequently Asked Questions (FAQ)

Q: Can the FMF1WSFRF52-15K directly replace the ROX1SF15K in existing designs?

A: Yes. Both parts share identical electrical specifications (15 kOhms, ±1%, 1W), axial package configuration, and safety features. The substitute part is mechanically and electrically compatible for direct PCB substitution.

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

A: Both compositions are thin-film resistor technologies suitable for precision applications. Metal oxide film (ROX1SF15K) and metal film (FMF1WSFRF52-15K) both achieve ±1% tolerance and flame-proof ratings. The metal film composition in the substitute offers improved temperature coefficient (±100ppm/°C versus ±350ppm/°C), resulting in better stability across temperature variations.

Q: Are there physical size differences between these parts?

A: Yes. The FMF1WSFRF52-15K is slightly smaller (3.30mm diameter x 9.00mm length) compared to the ROX1SF15K (3.50mm diameter x 10.00mm length). Both maintain standard axial through-hole spacing and are compatible with existing PCB hole patterns designed for 1W axial resistors.

Q: Does the extended operating temperature range of the substitute part affect compatibility?

A: No. The FMF1WSFRF52-15K operates from -55°C to 155°C, which encompasses the original part's range of -55°C to 130°C. The extended upper temperature limit provides additional operational margin without affecting compatibility in applications using the original temperature specification.

Q: Are both parts RoHS compliant?

A: The FMF1WSFRF52-15K is ROHS3 compliant and REACH unaffected. Compliance documentation for the obsolete ROX1SF15K is not provided in the available specifications.

Q: What packaging formats are available for the substitute part?

A: The FMF1WSFRF52-15K is supplied in Tape & Reel (TR) packaging format, suitable for automated assembly processes.

Q: Are export restrictions identical for both parts?

A: Yes. Both the ROX1SF15K and FMF1WSFRF52-15K are classified under ECCN EAR99, indicating identical export control treatment.