ROX1SF220K Equivalent & Substitute Parts

Part Overview

The ROX1SF220K is a 220 kOhms ±1% 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 precision resistance values and high reliability. The part is currently obsolete, necessitating identification of equivalent alternatives that maintain functional compatibility while meeting current availability and compliance requirements.

Substiute Parts

ROX1SF220K

TE Connectivity Passive ProductIn Stock: 858ROX1SF220K Datasheet

Current PartRFQ

ROX1SJ220K

TE Connectivity Passive ProductIn Stock: 52093ROX1SJ220K Datasheet

SimilarRFQ

FMF1WSFRF52-220K

YAGEOIn Stock: 1142FMF1WSFRF52-220K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ROX1SF220K is determined by the following critical parameters: resistance value (220 kOhms), power rating (1W), package type (axial through-hole), and physical form factor. The tolerance specification (±1%) and composition type (metal oxide film) define the primary substitution category.

Two substitute parts are identified based on these criteria:

ROX1SJ220K (TE Connectivity Passive Product): Maintains identical resistance value, power rating, package type, and operating temperature range. Differs in tolerance specification (±5% versus ±1%) and product status (active versus obsolete). Composition remains metal oxide film with equivalent flame-proof and pulse-withstanding features.

FMF1WSFRF52-220K (YAGEO): Maintains identical resistance value, power rating, and package type. Differs in composition (metal film versus metal oxide film), temperature coefficient (±100ppm/°C versus ±350ppm/°C), and extended operating temperature range (-55°C ~ 155°C versus -55°C ~ 130°C). Features flame-proof and safety characteristics without pulse-withstanding specification.

Parameter Comparison

Engineering Selection Recommendations

ROX1SJ220K Selection Criteria: This substitute is appropriate for applications where tolerance relaxation from ±1% to ±5% is acceptable. The part maintains identical physical dimensions, composition, and operating temperature range. Active product status ensures current availability and supply chain continuity. ROHS3 compliance and REACH unaffected status satisfy modern regulatory requirements. The identical metal oxide film composition and pulse-withstanding feature preservation make this the preferred substitute for direct form-fit-function replacement in existing designs.

FMF1WSFRF52-220K Selection Criteria: This substitute is appropriate for applications requiring improved temperature stability (±100ppm/°C versus ±350ppm/°C) and extended operating temperature range to 155°C. The metal film composition provides superior frequency response characteristics compared to metal oxide film. Slightly reduced physical dimensions (0.130" Dia x 0.354" L) may require PCB layout verification. Active product status and full regulatory compliance (ROHS3, REACH unaffected) support long-term availability. Selection of this substitute requires confirmation that pulse-withstanding feature absence does not impact application requirements.

Frequently Asked Questions (FAQ)

Q: Can ROX1SJ220K directly replace ROX1SF220K in all applications?

A: ROX1SJ220K maintains identical resistance value, power rating, package type, and operating temperature range. The tolerance difference (±5% versus ±1%) requires circuit-level analysis to confirm acceptability. Both parts share metal oxide film composition and equivalent safety features. Physical dimensions are identical, enabling direct PCB mounting without layout modifications.

Q: What are the key differences between ROX1SF220K and FMF1WSFRF52-220K?

A: Primary differences include composition (metal oxide film versus metal film), temperature coefficient (±350ppm/°C versus ±100ppm/°C), and operating temperature range (-55°C ~ 130°C versus -55°C ~ 155°C). Physical dimensions differ slightly (0.138" Dia x 0.394" L versus 0.130" Dia x 0.354" L). The FMF1WSFRF52-220K lacks pulse-withstanding feature specification present in the original part.

Q: Are there packaging differences between these substitutes?

A: ROX1SF220K and ROX1SJ220K share identical axial package dimensions (0.138" Dia x 0.394" L). FMF1WSFRF52-220K has slightly smaller dimensions (0.130" Dia x 0.354" L) but maintains axial through-hole configuration. All three parts feature two terminations suitable for standard PCB mounting. Packaging format differs (ROX1SJ220K supplied in Cut Tape; FMF1WSFRF52-220K supplied in Tape & Reel), affecting procurement and assembly processes.

Q: Which substitute offers the best long-term availability?

A: Both ROX1SJ220K and FMF1WSFRF52-220K carry active product status, ensuring current manufacturing and supply chain support. ROX1SJ220K maintains TE Connectivity Passive Product manufacturing continuity within the same product family (ROX series). FMF1WSFRF52-220K represents YAGEO's active FMF series offering. Both parts comply with ROHS3 and REACH requirements, supporting regulatory compliance for new designs.

Q: Can tolerance differences affect circuit performance?

A: Tolerance specification defines the maximum deviation from nominal resistance value. ROX1SF220K and FMF1WSFRF52-220K specify ±1% tolerance (maximum deviation of 2.2 kOhms from 220 kOhms nominal). ROX1SJ220K specifies ±5% tolerance (maximum deviation of 11 kOhms from 220 kOhms nominal). Circuit designs requiring precision resistance values must evaluate whether ±5% tolerance remains within acceptable operating parameters.

Q: What is the significance of temperature coefficient differences?

A: Temperature coefficient defines resistance value change per degree Celsius within the operating temperature range. ROX1SF220K and ROX1SJ220K specify ±350ppm/°C; FMF1WSFRF52-220K specifies ±100ppm/°C. Lower temperature coefficient indicates superior stability across temperature variations. Applications operating across wide temperature ranges benefit from FMF1WSFRF52-220K's improved temperature stability, while applications with limited temperature variation tolerate higher coefficients.

Q: Is pulse-withstanding capability critical for substitution?

A: Pulse-withstanding feature indicates the component's ability to withstand transient overvoltage conditions. ROX1SF220K and ROX1SJ220K explicitly specify this feature; FMF1WSFRF52-220K does not. Applications subject to voltage transients, switching events, or surge conditions require pulse-withstanding capability. Applications operating under stable voltage conditions may not require this feature, making FMF1WSFRF52-220K acceptable.