RSF3JB8K20 Equivalent & Substitute Parts

Part Overview

The RSF3JB8K20 is an 8.2 kOhms ±5% 3W axial through-hole resistor manufactured by Stackpole Electronics Inc. This metal oxide film resistor features flame retardant coating and safety design, suitable for applications requiring reliable power dissipation in the 3W range. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to inventory constraints, packaging format needs, or design optimization for higher power ratings.

Substiute Parts

RSF3JB8K20

Stackpole Electronics IncIn Stock: 1154RSF3JB8K20 Datasheet

Current PartRFQ

RSMF5JT8K20

Stackpole Electronics IncIn Stock: 903RSMF5JT8K20 Datasheet

UpgradeRFQ

ROX3SJ8K2

TE Connectivity Passive ProductIn Stock: 14202ROX3SJ8K2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RSF3JB8K20 is determined by the following critical parameters:

• Resistance value: 8.2 kOhms (exact match required)
• Tolerance: ±5% (exact match required)
• Composition: Metal Oxide Film (exact match required)
• Package: Axial through-hole (exact match required)
• Power rating: Equal to or greater than 3W (upgrade acceptable)
• Operating temperature range: Must encompass or match -55°C ~ 235°C
• RoHS compliance: ROHS3 Compliant (maintained)

Two substitute parts meet these criteria: RSMF5JT8K20 (upgrade to 5W power rating with enhanced flame proof features) and ROX3SJ8K2 (equivalent 3W rating from alternative manufacturer with pulse withstanding capability).

Parameter Comparison

Engineering Selection Recommendations

RSMF5JT8K20 (Stackpole Electronics Inc): This substitute provides a direct upgrade path within the same manufacturer family. The 5W power rating accommodates higher dissipation requirements while maintaining identical resistance, tolerance, and temperature coefficient specifications. Operating temperature range remains -55°C ~ 235°C. ROHS3 compliance is maintained. Flame proof features exceed the original flame retardant specification. Suitable for applications requiring enhanced thermal margin or higher power dissipation without circuit redesign.

ROX3SJ8K2 (TE Connectivity Passive Product): This substitute maintains the original 3W power rating and provides equivalent electrical performance. The part is from an established alternative manufacturer with pulse withstanding capability. Temperature coefficient is ±350ppm/°C (higher than original ±200ppm/°C), and maximum operating temperature is 200°C (lower than original 235°C). ROHS3 compliance is maintained. Suitable for applications where manufacturer diversification or pulse withstanding performance is required, provided operating temperature does not exceed 200°C.

Frequently Asked Questions (FAQ)

Q: Can RSMF5JT8K20 be used as a direct replacement for RSF3JB8K20?

A: Yes. The RSMF5JT8K20 maintains identical resistance (8.2 kOhms), tolerance (±5%), composition (metal oxide film), and axial package configuration. The 5W power rating is a functional upgrade that does not compromise circuit compatibility. Both parts operate across -55°C ~ 235°C and are ROHS3 compliant.

Q: What are the limitations of ROX3SJ8K2 as a substitute?

A: The ROX3SJ8K2 has two parameter differences: temperature coefficient of ±350ppm/°C (versus ±200ppm/°C) and maximum operating temperature of 200°C (versus 235°C). These differences require verification against circuit operating conditions. The part is suitable only for applications operating below 200°C.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Bulk, Tape & Reel, Cut Tape) affects supply chain logistics and assembly automation compatibility, not electrical performance. All three parts deliver identical electrical characteristics within their specified parameter ranges.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. RSF3JB8K20, RSMF5JT8K20, and ROX3SJ8K2 are all ROHS3 compliant, maintaining regulatory compliance across substitution options.

Q: Which substitute should be selected for maximum thermal margin?

A: RSMF5JT8K20 provides the highest thermal margin with its 5W power rating, allowing operation at higher dissipation levels than the original 3W specification while maintaining all other electrical parameters.