ROX1SF330R Equivalent & Substitute Parts

Part Overview

The ROX1SF330R is a 330 Ohms ±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 compatibility while offering active product status and improved availability.

Substiute Parts

ROX1SF330R

TE Connectivity Passive ProductIn Stock: 919ROX1SF330R Datasheet

Current PartRFQ

ROX1SJ330R

TE Connectivity Passive ProductIn Stock: 4164ROX1SJ330R Datasheet

SimilarRFQ

FMF1WSFRF52-330R

YAGEOIn Stock: 983FMF1WSFRF52-330R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ROX1SF330R are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Resistance value: 330 Ohms (exact match required)
• Power rating: 1W (exact match required)
• Package type: Axial (exact match required)
• Number of terminations: 2 (exact match required)

Secondary Compatibility Criteria:

• Tolerance: ±1% preferred; ±5% acceptable with design margin verification
• Composition: Metal oxide film or metal film acceptable
• Operating temperature range: Minimum -55°C ~ 130°C required
• Features: Flame proof and safety characteristics required

The ROX1SJ330R serves as a direct TE Connectivity alternative with identical electrical specifications except for tolerance (±5% versus ±1%). The FMF1WSFRF52-330R from YAGEO provides an equivalent substitute with matching tolerance (±1%) and enhanced temperature performance, utilizing metal film composition instead of metal oxide film.

Parameter Comparison

Engineering Selection Recommendations

ROX1SJ330R Selection Criteria: The ROX1SJ330R is recommended for applications where tolerance relaxation to ±5% is acceptable within circuit design margins. This substitute maintains identical physical dimensions, operating temperature range, and safety features as the original ROX1SF330R. The part is active in production with ROHS3 compliance, ensuring long-term availability and regulatory alignment.

FMF1WSFRF52-330R Selection Criteria: The FMF1WSFRF52-330R is recommended for applications requiring ±1% tolerance matching the original specification. This YAGEO metal film resistor provides superior temperature coefficient performance (±100ppm/°C versus ±350ppm/°C) and extended operating temperature range (-55°C ~ 155°C). The part is active in production with ROHS3 compliance and REACH unaffected status. Physical dimensions are slightly reduced (3.30mm x 9.00mm), requiring verification of PCB layout compatibility.

Both substitute parts maintain the required axial package configuration, 1W power rating, 330 Ohms resistance value, and flame-proof safety characteristics necessary for functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can ROX1SJ330R replace ROX1SF330R in all applications? A: The ROX1SJ330R is functionally equivalent for applications where ±5% tolerance is acceptable. The tolerance difference must be evaluated against circuit design requirements. All other electrical and mechanical parameters remain identical.

Q: What is the primary difference between ROX1SJ330R and FMF1WSFRF52-330R? A: The ROX1SJ330R maintains TE Connectivity metal oxide film composition with ±5% tolerance, while the FMF1WSFRF52-330R uses YAGEO metal film composition with ±1% tolerance and superior temperature coefficient (±100ppm/°C). The FMF variant also provides extended operating temperature range to 155°C.

Q: Are physical dimensions identical across all three parts? A: The ROX1SF330R and ROX1SJ330R share identical dimensions (3.50mm x 10.00mm). The FMF1WSFRF52-330R has slightly reduced dimensions (3.30mm x 9.00mm), which may affect PCB layout in space-constrained applications.

Q: Do all substitute parts meet safety and compliance requirements? A: Both substitute parts maintain flame-proof and safety characteristics. The ROX1SJ330R and FMF1WSFRF52-330R are ROHS3 compliant. The FMF1WSFRF52-330R carries REACH unaffected status, while the ROX1SJ330R has undefined REACH status.

Q: Which substitute offers the best long-term availability? A: Both ROX1SJ330R and FMF1WSFRF52-330R are active products with higher inventory levels than the obsolete ROX1SF330R, ensuring sustained availability for future procurement.

Q: What is the impact of temperature coefficient differences? A: The FMF1WSFRF52-330R exhibits superior temperature stability with ±100ppm/°C compared to ±350ppm/°C for both TE Connectivity variants. This results in reduced resistance drift across the operating temperature range, beneficial for precision applications.