RSF3JB12R0 Equivalent & Substitute Parts

Part Overview

The RSF3JB12R0 is a 12 Ohms ±5% 3W through-hole axial resistor manufactured by Stackpole Electronics Inc. It features metal oxide film composition with flame retardant coating and safety characteristics, designed for applications requiring reliable power dissipation in compact form factors. The part is currently active in production with 899 units in stock. Substitute parts are identified to support procurement flexibility, design optimization, and supply chain continuity.

Substiute Parts

RSF3JB12R0

Stackpole Electronics IncIn Stock: 983RSF3JB12R0 Datasheet

Current PartRFQ

ROX3SJ12R

TE Connectivity Passive ProductIn Stock: 11956ROX3SJ12R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RSF3JB12R0 are qualified based on the following critical parameters:

• Resistance value: 12 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 3W (exact match required)
• Composition: Metal Oxide Film (exact match required)
• Package: Axial through-hole (exact match required)
• Compliance: ROHS3 Compliant and REACH Unaffected (minimum requirement)

The ROX3SJ12R from TE Connectivity Passive Product meets all substitution criteria as a direct equivalent within the allowed electrical and mechanical parameters for this resistor category.

Parameter Comparison

Engineering Selection Recommendations

Both the RSF3JB12R0 and ROX3SJ12R meet ROHS3 compliance and REACH unaffected status, qualifying them for equivalent use in applications requiring regulatory adherence. The RSF3JB12R0 operates to 235°C maximum, while the ROX3SJ12R operates to 200°C maximum. The RSF3JB12R0 exhibits superior temperature stability at ±200ppm/°C compared to the ROX3SJ12R at ±350ppm/°C. Physical dimensions differ slightly, with the ROX3SJ12R being more compact. Selection between these parts should be based on specific application temperature requirements and available board space.

Frequently Asked Questions (FAQ)

Q: Can ROX3SJ12R replace RSF3JB12R0 in all applications?

A: ROX3SJ12R qualifies as an equivalent substitute where the maximum operating temperature does not exceed 200°C. Applications requiring operation above 200°C must use RSF3JB12R0.

Q: What are the physical differences between these parts?

A: RSF3JB12R0 measures 0.236" diameter x 0.689" length (6.00mm x 17.50mm). ROX3SJ12R measures 0.217" diameter x 0.630" length (5.50mm x 16.00mm). Both are axial through-hole packages with 2 terminations.

Q: Are both parts RoHS compliant?

A: Yes, both RSF3JB12R0 and ROX3SJ12R are ROHS3 compliant and REACH unaffected.

Q: What is the difference in temperature coefficient?

A: RSF3JB12R0 has a temperature coefficient of ±200ppm/°C, while ROX3SJ12R has ±350ppm/°C. Applications requiring tighter temperature stability should specify RSF3JB12R0.

Q: Are these parts interchangeable in PCB layouts?

A: Both parts use axial through-hole packaging with identical termination count. The slightly smaller physical dimensions of ROX3SJ12R may provide layout advantages in space-constrained designs, but both fit standard axial component footprints.