RSF3JB27R0 Equivalent & Substitute Parts

Part Overview

The RSF3JB27R0 is a 27 Ohm, 3W through-hole axial resistor manufactured by Stackpole Electronics Inc. This metal oxide film resistor features flame retardant coating and is designed for applications requiring reliable power dissipation in compact form factors. The part is currently active in production with 913 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter range for this resistor category.

Substiute Parts

RSF3JB27R0

Stackpole Electronics IncIn Stock: 1013RSF3JB27R0 Datasheet

Current PartRFQ

ROX3SJ27R

TE Connectivity Passive ProductIn Stock: 22131ROX3SJ27R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RSF3JB27R0 is determined by the following critical parameters:

• Resistance value: 27 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)
• RoHS compliance: ROHS3 Compliant (required for regulatory alignment)

The ROX3SJ27R from TE Connectivity Passive Product meets all substitution criteria. Both parts share identical electrical specifications (27Ω, ±5%, 3W) and axial packaging. Both are ROHS3 compliant and operate within overlapping temperature ranges suitable for equivalent circuit performance.

Parameter Comparison

Engineering Selection Recommendations

Both the RSF3JB27R0 and ROX3SJ27R are active production parts with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The ROX3SJ27R offers higher inventory availability (22,059 units) compared to the RSF3JB27R0 (913 units), which may influence supply chain decisions. Physical dimensions differ slightly, with the ROX3SJ27R being more compact. The RSF3JB27R0 operates to a higher maximum temperature (235°C vs. 200°C), while the ROX3SJ27R exhibits a higher temperature coefficient (±350ppm/°C vs. ±200ppm/°C). Selection between these parts should be based on specific application requirements regarding thermal performance, available board space, and supply availability.

Frequently Asked Questions (FAQ)

Q: Can ROX3SJ27R replace RSF3JB27R0 in all applications?

A: Both parts share identical electrical specifications (27Ω, ±5%, 3W) and axial packaging. The ROX3SJ27R is physically more compact and has a higher temperature coefficient. Applications operating near the upper temperature limit (above 200°C) or requiring the lowest temperature coefficient should evaluate the specific thermal and stability requirements.

Q: What are the physical dimension differences?

A: The RSF3JB27R0 measures 0.236" diameter x 0.689" length (6.00mm x 17.50mm). The ROX3SJ27R measures 0.217" diameter x 0.630" length (5.50mm x 16.00mm). The ROX3SJ27R is approximately 8.5% shorter and 8% smaller in diameter, which may affect board layout considerations.

Q: Are both parts RoHS compliant?

A: Yes, both the RSF3JB27R0 and ROX3SJ27R are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the temperature coefficient difference impact?

A: The RSF3JB27R0 has a temperature coefficient of ±200ppm/°C, while the ROX3SJ27R is ±350ppm/°C. In applications with wide temperature swings or requiring tight resistance stability across temperature ranges, the lower coefficient of the RSF3JB27R0 provides superior performance.

Q: Which part has better availability?

A: The ROX3SJ27R has significantly higher inventory (22,059 units) versus the RSF3JB27R0 (913 units), making it the preferred choice for applications where supply continuity is a priority.