RSF3JB820R Equivalent & Substitute Parts

Part Overview

The RSF3JB820R is a 820 Ohms ±5% 3W through-hole axial resistor manufactured by Stackpole Electronics Inc. This metal oxide film resistor features flame retardant coating and safety design, with an operating temperature range of -55°C to 235°C. The part is currently active in production with 756 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit applications.

Substiute Parts

RSF3JB820R

Stackpole Electronics IncIn Stock: 849RSF3JB820R Datasheet

Current PartRFQ

ROX3SJ820R

TE Connectivity Passive ProductIn Stock: 58450ROX3SJ820R Datasheet

MFR RecommendedRFQ

SQP500JB-820R

YAGEOIn Stock: 1558SQP500JB-820R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RSF3JB820R are qualified based on the following critical parameters:

Electrical Equivalence Requirements:

• Resistance value: 820 Ohms
• Tolerance: ±5%
• Composition: Metal Oxide Film
• Package: Axial through-hole configuration

Mechanical Compatibility:

• Axial lead configuration for PCB mounting
• Two terminations for standard through-hole assembly

Compliance Requirements:

• RoHS3 compliance
• REACH unaffected status
• EAR99 export classification

The identified substitutes meet these core requirements while maintaining functional equivalence in circuit applications. Variations in power rating, temperature coefficient, and maximum operating temperature are noted as secondary parameters that may affect performance in specific thermal or power dissipation environments.

Parameter Comparison

Engineering Selection Recommendations

ROX3SJ820R (TE Connectivity): This substitute maintains metal oxide film composition with identical 3W power rating and 820 Ohm resistance. The part is RoHS3 compliant and active in production. Physical dimensions are slightly smaller (5.50mm diameter vs 6.00mm), which may provide layout advantages in space-constrained applications. The maximum operating temperature is 200°C, which is 35°C lower than the main part. This substitute is suitable for applications where the thermal environment does not exceed 200°C.

SQP500JB-820R (YAGEO): This substitute provides higher power rating (5W vs 3W) with identical 820 Ohm resistance and ±5% tolerance. The composition differs (cement vs metal oxide film), and the physical form is rectangular rather than cylindrical. The maximum operating temperature is 155°C, which is significantly lower than the main part. This substitute is applicable in applications requiring higher power dissipation capability but operating within the 155°C thermal limit. The larger physical dimensions must be verified for PCB layout compatibility.

All substitutes maintain RoHS3 compliance and active product status.

Frequently Asked Questions (FAQ)

Q: Can ROX3SJ820R replace RSF3JB820R in all applications?

A: ROX3SJ820R is electrically equivalent for 820 Ohm ±5% 3W applications. The primary constraint is the maximum operating temperature of 200°C versus 235°C for the main part. Substitution is valid for applications operating below 200°C. Physical dimensions are slightly smaller, which may affect mechanical fit in some PCB layouts.

Q: What is the key difference between ROX3SJ820R and SQP500JB-820R?

A: ROX3SJ820R maintains metal oxide film composition and 3W power rating with a maximum operating temperature of 200°C. SQP500JB-820R uses cement composition, provides 5W power rating, and has a maximum operating temperature of 155°C. The SQP500JB-820R is larger physically and suitable for higher power dissipation in lower-temperature environments.

Q: Are all substitutes RoHS3 compliant?

A: Yes. RSF3JB820R, ROX3SJ820R, and SQP500JB-820R are all RoHS3 compliant and REACH unaffected.

Q: Does the packaging format affect electrical performance?

A: No. Packaging format (Bulk, Cut Tape, or Tray) affects supply chain logistics and handling but does not alter electrical or thermal performance of the resistor itself.

Q: Can SQP500JB-820R be used in place of RSF3JB820R?

A: SQP500JB-820R provides equivalent 820 Ohm ±5% resistance and higher power rating (5W). However, the maximum operating temperature is 155°C, which is 80°C lower than the main part. Substitution is valid only for applications with operating temperatures below 155°C. The larger rectangular form factor must be verified for PCB layout compatibility.

Q: What is the significance of temperature coefficient differences?

A: Temperature coefficient indicates resistance value drift with temperature change. RSF3JB820R has ±200ppm/°C, ROX3SJ820R has ±350ppm/°C. In applications with significant temperature variation, the higher coefficient of ROX3SJ820R may result in greater resistance value deviation. This is a secondary consideration when primary thermal limits are satisfied.