ROX1SF820R Equivalent & Substitute Parts

Part Overview

The ROX1SF820R is an 820 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 currently obsolete, necessitating identification of equivalent alternatives that maintain the same electrical and mechanical specifications for continued system support and new designs.

Substiute Parts

ROX1SF820R

TE Connectivity Passive ProductIn Stock: 1188ROX1SF820R Datasheet

Current PartRFQ

ROX1SJ820R

TE Connectivity Passive ProductIn Stock: 20261ROX1SJ820R Datasheet

SimilarRFQ

FMF1WSFRF52-820R

YAGEOIn Stock: 1134FMF1WSFRF52-820R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ROX1SF820R is determined by the following critical parameters:

Primary Matching Criteria:

• Resistance value: 820 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 circuit design verification
• Composition: Metal oxide film or metal film acceptable
• Operating temperature range: Must encompass -55°C ~ 130°C minimum
• Features: Flame proof and safety characteristics required

The substitute parts listed maintain the core electrical specifications (820 Ohms, 1W, axial package) while varying in tolerance, composition, and temperature coefficient. These variations are permissible within standard engineering practice for through-hole resistor substitution.

Parameter Comparison

Engineering Selection Recommendations

ROX1SJ820R (TE Connectivity Passive Product)

This substitute maintains identical physical dimensions, composition, and operating temperature range to the ROX1SF820R. The primary difference is tolerance specification at ±5% versus ±1%. The ROX1SJ820R is currently active in production with ROHS3 compliance. Selection of this part is appropriate for applications where the ±5% tolerance is acceptable within circuit design margins. This part represents the closest functional equivalent from the same manufacturer series.

FMF1WSFRF52-820R (YAGEO)

This substitute provides 820 Ohms at ±1% tolerance with metal film composition, matching the tolerance specification of the main part. The FMF1WSFRF52-820R features an extended operating temperature range to 155°C and superior temperature coefficient at ±100ppm/°C compared to ±350ppm/°C. Physical dimensions are slightly smaller (0.130" Dia x 0.354" L versus 0.138" Dia x 0.394" L). This part is currently active in production with ROHS3 compliance and REACH unaffected status. Selection is appropriate for applications requiring tighter temperature stability and extended thermal operating range.

Frequently Asked Questions (FAQ)

Q: Can ROX1SJ820R replace ROX1SF820R in all applications?

A: ROX1SJ820R is compatible for applications where ±5% tolerance is acceptable. The identical physical dimensions, composition, and operating temperature range ensure mechanical and thermal compatibility. Circuit design verification is required to confirm that the wider tolerance does not exceed acceptable resistance variation limits.

Q: What is the primary difference between ROX1SF820R and FMF1WSFRF52-820R?

A: Both parts maintain ±1% tolerance and 1W power rating at 820 Ohms. The FMF1WSFRF52-820R uses metal film composition instead of metal oxide film, resulting in superior temperature coefficient (±100ppm/°C versus ±350ppm/°C) and extended operating temperature range (-55°C ~ 155°C versus -55°C ~ 130°C). Physical dimensions are slightly smaller.

Q: Are the physical dimensions of FMF1WSFRF52-820R compatible with ROX1SF820R footprints?

A: FMF1WSFRF52-820R dimensions are 0.130" Dia x 0.354" L compared to ROX1SF820R at 0.138" Dia x 0.394" L. Both are axial package types with two terminations. The smaller dimensions of the YAGEO part fit within standard axial resistor footprints designed for the TE part, though PCB layout verification is recommended for high-density designs.

Q: Which substitute part should be selected for temperature-sensitive applications?

A: FMF1WSFRF52-820R is recommended for temperature-sensitive applications due to its superior temperature coefficient of ±100ppm/°C and extended operating range to 155°C. This part maintains tighter resistance stability across the full operating temperature spectrum.

Q: Are all substitute parts RoHS compliant?

A: ROX1SJ820R carries ROHS3 compliance. FMF1WSFRF52-820R carries ROHS3 compliance with REACH unaffected status. Both active substitute parts meet current environmental compliance requirements.

Q: What is the inventory status of substitute parts?

A: ROX1SJ820R has 20,251 pieces in stock. FMF1WSFRF52-820R has 1,084 pieces in stock. Both parts are currently available from inventory.