RSF3JB12K0 Equivalent & Substitute Parts

Part Overview

The RSF3JB12K0 is a 12 kOhms ±5% 3W through-hole resistor manufactured by Stackpole Electronics Inc. It features a metal oxide film composition with flame retardant coating and safety characteristics, designed for axial package applications. The part is currently active in production with ROHS3 compliance and REACH unaffected status. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter range.

Substiute Parts

RSF3JB12K0

Stackpole Electronics IncIn Stock: 1213RSF3JB12K0 Datasheet

Current PartRFQ

ROX3SJ12K

TE Connectivity Passive ProductIn Stock: 76127ROX3SJ12K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RSF3JB12K0 is determined by strict equivalence in the following parameters:

• Resistance value: 12 kOhms
• Tolerance: ±5%
• Power rating: 3W
• Composition: Metal Oxide Film
• Package: Axial configuration
• Termination count: 2
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

The ROX3SJ12K qualifies as a substitute part because it maintains all critical electrical specifications and mechanical compatibility within the allowed parameter set. Variations in temperature coefficient, maximum operating temperature, physical dimensions, and feature enhancements (flame proof vs. flame retardant, pulse withstanding capability) do not disqualify substitution when the core functional parameters remain equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the RSF3JB12K0 and ROX3SJ12K are active production parts with equivalent ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on application-specific requirements:

The RSF3JB12K0 provides a wider operating temperature range (-55°C to 235°C) and lower temperature coefficient (±200ppm/°C), making it suitable for high-temperature applications. The ROX3SJ12K operates to 200°C maximum with a higher temperature coefficient (±350ppm/°C) but offers enhanced pulse withstanding capability and flame proof characteristics. Physical dimensions differ slightly, with the ROX3SJ12K being more compact. Both parts maintain identical electrical specifications for resistance, tolerance, and power rating, ensuring functional interchangeability in standard circuit applications where the operating temperature and environmental requirements fall within the overlapping range of -55°C to 200°C.

Frequently Asked Questions (FAQ)

Q: Can ROX3SJ12K replace RSF3JB12K0 in all applications?

A: ROX3SJ12K is electrically and mechanically equivalent for applications operating between -55°C and 200°C. Applications requiring operation above 200°C must use RSF3JB12K0, which is rated to 235°C.

Q: What is the difference in physical size between these parts?

A: RSF3JB12K0 measures 0.236" diameter x 0.689" length (6.00mm x 17.50mm). ROX3SJ12K measures 0.217" diameter x 0.630" length (5.50mm x 16.00mm). The ROX3SJ12K is slightly more compact. Both fit standard axial package footprints.

Q: Are both parts RoHS compliant?

A: Yes, both RSF3JB12K0 and ROX3SJ12K are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Q: How do temperature coefficients affect part selection?

A: RSF3JB12K0 has a temperature coefficient of ±200ppm/°C, while ROX3SJ12K is ±350ppm/°C. For precision applications with tight tolerance requirements across temperature ranges, RSF3JB12K0 provides superior stability.

Q: What packaging formats are available?

A: RSF3JB12K0 is supplied in bulk packaging. ROX3SJ12K is available in cut tape (CT) format. Packaging selection depends on assembly process requirements and order quantities.