ROX1SF82K Equivalent & Substitute Parts

Part Overview

The ROX1SF82K is an 82 kOhms ±1% 1W through-hole resistor manufactured by TE Connectivity Passive Product in the ROX/Neohm series. This axial metal oxide film resistor features flame-proof and pulse-withstanding characteristics with a safety rating. The product is currently obsolete, necessitating identification of equivalent substitute components that maintain functional compatibility for existing designs and applications requiring replacement inventory.

Substiute Parts

ROX1SF82K

TE Connectivity Passive ProductIn Stock: 947ROX1SF82K Datasheet

Current PartRFQ

FMF1WSFRF52-82K

YAGEOIn Stock: 1071FMF1WSFRF52-82K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROX1SF82K is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 82 kOhms
• Tolerance: ±1%
• Power rating: 1W
• Package configuration: Axial through-hole
• Number of terminations: 2
• Flame-proof and safety-rated construction

Acceptable Variation Parameters:

• Composition: Metal oxide film or metal film acceptable (both provide equivalent electrical performance at specified ratings)
• Temperature coefficient: Substitute may differ from original specification
• Operating temperature range: Substitute may exceed original range
• Physical dimensions: Minor variations acceptable within axial package constraints

The FMF1WSFRF52-82K from YAGEO meets all mandatory matching parameters and qualifies as a direct functional equivalent for the obsolete ROX1SF82K.

Parameter Comparison

Engineering Selection Recommendations

The FMF1WSFRF52-82K is the qualified substitute for the obsolete ROX1SF82K based on the following engineering criteria:

Electrical Equivalence: Both components provide identical resistance (82 kOhms) and tolerance (±1%) at the same power rating (1W). The metal film composition of the substitute provides superior temperature coefficient performance (±100ppm/°C versus ±350ppm/°C), resulting in improved stability across the operating temperature range.

Functional Compatibility: Both resistors feature flame-proof and safety-rated construction, meeting the same safety and reliability requirements. The extended operating temperature range of the substitute (-55°C ~ 155°C versus -55°C ~ 130°C) provides additional thermal margin for applications.

Compliance Status: The FMF1WSFRF52-82K is an active product with ROHS3 compliance and REACH unaffected status, ensuring long-term availability and regulatory alignment. The ROX1SF82K obsolete status necessitates transition to this active equivalent.

Physical Considerations: The substitute exhibits slightly smaller physical dimensions (3.30mm x 9.00mm versus 3.50mm x 10.00mm), which is compatible with standard axial through-hole PCB layouts designed for the original component.

Frequently Asked Questions (FAQ)

Q: Can the FMF1WSFRF52-82K directly replace the ROX1SF82K in existing designs?

A: Yes. Both components share identical electrical specifications (82 kOhms, ±1%, 1W) and axial package configuration. The substitute's smaller physical dimensions and improved temperature coefficient provide enhanced performance characteristics. PCB layouts designed for the ROX1SF82K accommodate the FMF1WSFRF52-82K without modification.

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

A: Both compositions are suitable for this application. Metal oxide film (original) provides robust pulse-withstanding capability. Metal film (substitute) delivers superior temperature stability with a lower temperature coefficient (±100ppm/°C versus ±350ppm/°C), resulting in more consistent resistance values across temperature variations.

Q: Are there any compliance or certification differences between these components?

A: The FMF1WSFRF52-82K carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. Both components share identical ECCN (EAR99) and HTSUS classifications. The substitute's active product status ensures ongoing availability and support.

Q: How do the operating temperature ranges compare?

A: The ROX1SF82K operates from -55°C to 130°C, while the FMF1WSFRF52-82K extends to 155°C. The substitute provides additional thermal margin, making it suitable for applications requiring extended high-temperature performance.

Q: What packaging format is the substitute available in?

A: The FMF1WSFRF52-82K is supplied in Tape & Reel (TR) format, standard for automated assembly processes. The original ROX1SF82K packaging format is not specified in the available data.

Q: Are there inventory considerations for component selection?

A: The FMF1WSFRF52-82K is currently in active production with 1013 pieces available in new original stock. The ROX1SF82K, being obsolete, has limited remaining inventory (857 pieces). For new designs and long-term production requirements, the active substitute is the appropriate selection.