RSF3JB100K Equivalent & Substitute Parts

Part Overview

The RSF3JB100K is a 100 kOhms ±5% 3W axial through-hole 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 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 dissipation capability.

Substiute Parts

RSF3JB100K

Stackpole Electronics IncIn Stock: 1225RSF3JB100K Datasheet

Current PartRFQ

RSMF5JT100K

Stackpole Electronics IncIn Stock: 1167RSMF5JT100K Datasheet

UpgradeRFQ

ROX3SJ100K

TE Connectivity Passive ProductIn Stock: 149165ROX3SJ100K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Primary Criteria (Must Match):

• Resistance value: 100 kOhms
• Tolerance: ±5%
• Composition: Metal Oxide Film
• Package type: Axial through-hole
• RoHS compliance: ROHS3 Compliant

Secondary Criteria (Allowable Variation):

• Power rating: Equal or greater than 3W
• Temperature coefficient: Within acceptable engineering margins
• Operating temperature range: Must encompass or match the application requirement
• Physical dimensions: Axial package compatibility

The RSF3JB100K has two identified substitutes: RSMF5JT100K (Stackpole Electronics Inc, 5W upgrade) and ROX3SJ100K (TE Connectivity, equivalent 3W specification).

Parameter Comparison

Engineering Selection Recommendations

RSF3JB100K (Original Part): Select when bulk packaging is required and the 3W power rating meets circuit requirements. Flame retardant coating and safety features are specified. Operating temperature range extends to 235°C.

RSMF5JT100K (Stackpole Upgrade): Select when higher power dissipation capability (5W) is needed within the same resistance and tolerance specifications. Maintains identical temperature coefficient and extended operating temperature range. Tape & Reel packaging format is suitable for automated assembly. Flame proof rating provides enhanced safety characteristics.

ROX3SJ100K (TE Connectivity Alternative): Select when TE Connectivity supply chain preference is required or when Cut Tape packaging format is specified. Equivalent 3W power rating and resistance value. Temperature coefficient is ±350ppm/°C, which represents a 75% increase from the original specification. Operating temperature maximum is 200°C, which is 35°C lower than the original part. Pulse withstanding feature is included. Extensive inventory availability (149,083 pcs) supports high-volume applications.

All three parts maintain ROHS3 compliance and Active product status, ensuring regulatory and supply continuity.

Frequently Asked Questions (FAQ)

Q: Can RSMF5JT100K replace RSF3JB100K in all applications?

A: Yes, within the constraint that the circuit board layout accommodates the same axial package dimensions. The 5W rating provides additional thermal margin and is backward compatible with 3W circuit requirements. Tape & Reel packaging requires automated assembly equipment; manual assembly applications may prefer bulk packaging.

Q: What is the impact of the ±350ppm/°C temperature coefficient in ROX3SJ100K compared to ±200ppm/°C in RSF3JB100K?

A: The ROX3SJ100K exhibits 75% higher temperature-dependent resistance drift. Applications requiring tight resistance stability across temperature extremes should verify that the higher coefficient remains within circuit tolerance budgets.

Q: Is ROX3SJ100K suitable for applications requiring 235°C operation?

A: No. ROX3SJ100K maximum operating temperature is 200°C. Applications requiring operation above 200°C must use RSF3JB100K or RSMF5JT100K.

Q: What packaging format differences exist between the three parts?

A: RSF3JB100K is supplied in Bulk format (loose components). RSMF5JT100K is supplied in Tape & Reel (TR) format for automated pick-and-place assembly. ROX3SJ100K is supplied in Cut Tape (CT) format for semi-automated or manual assembly. Selection depends on assembly process requirements.

Q: Are all three parts ROHS3 compliant?

A: Yes. RSF3JB100K, RSMF5JT100K, and ROX3SJ100K are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Can ROX3SJ100K be used as a direct drop-in replacement for RSF3JB100K?

A: Electrical substitution is valid for circuits where the operating temperature does not exceed 200°C and the ±350ppm/°C temperature coefficient is acceptable. Physical dimensions differ slightly (ROX3SJ100K: 5.50mm diameter × 16.00mm length vs. RSF3JB100K: 6.00mm diameter × 17.50mm length), which may affect board layout spacing but remains compatible with standard axial component footprints.