RSF3JB2R70 Equivalent & Substitute Parts

Part Overview

The RSF3JB2R70 is a 2.7 Ohms ±5% 3W through-hole axial 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 3-watt range. The part is currently active in production with 670 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter tolerances for this resistor category.

Substiute Parts

RSF3JB2R70

Stackpole Electronics IncIn Stock: 686RSF3JB2R70 Datasheet

Current PartRFQ

ROX3SJ2R7

TE Connectivity Passive ProductIn Stock: 4073ROX3SJ2R7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RSF3JB2R70 is determined by the following critical parameters:

• Resistance value: 2.7 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 (minimum requirement)

The ROX3SJ2R7 manufactured by TE Connectivity Passive Product meets all substitution criteria. Both parts share identical electrical specifications (resistance, tolerance, power rating) and mechanical form factor (axial package). Both are ROHS3 compliant and maintain metal oxide film construction suitable for equivalent circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the RSF3JB2R70 and ROX3SJ2R7 are active production parts with ROHS3 compliance. Selection between these parts should be based on application-specific requirements:

The RSF3JB2R70 is suitable for applications requiring operation up to 235°C and tighter temperature coefficient stability (±200ppm/°C). The part features flame retardant coating and is available in bulk packaging.

The ROX3SJ2R7 is suitable for applications with maximum operating temperature requirements up to 200°C. This part features flame proof and pulse withstanding characteristics, with higher inventory availability (4034 units) and cut tape packaging option. The temperature coefficient is ±350ppm/°C, which may be acceptable for applications with less stringent stability requirements.

Both parts maintain identical electrical performance in resistance value, tolerance, and power dissipation capability. Physical dimensions differ slightly, with the ROX3SJ2R7 being marginally smaller in diameter and length.

Frequently Asked Questions (FAQ)

Q: Can ROX3SJ2R7 be used as a direct replacement for RSF3JB2R70?

A: Yes, for applications where the operating temperature does not exceed 200°C and temperature coefficient tolerance of ±350ppm/°C is acceptable. Both parts share identical resistance (2.7 Ohms), tolerance (±5%), power rating (3W), and axial package configuration.

Q: What are the key differences between these two parts?

A: The primary differences are operating temperature range (RSF3JB2R70: -55°C to 235°C; ROX3SJ2R7: -55°C to 200°C), temperature coefficient (RSF3JB2R70: ±200ppm/°C; ROX3SJ2R7: ±350ppm/°C), and physical dimensions (RSF3JB2R70: 6.00mm diameter; ROX3SJ2R7: 5.50mm diameter). Both are ROHS3 compliant metal oxide film resistors in axial packages.

Q: Are the physical dimensions compatible with existing PCB layouts?

A: Both parts use axial through-hole packages with similar lead spacing. The RSF3JB2R70 has a slightly larger diameter (6.00mm vs 5.50mm) and length (17.50mm vs 16.00mm). PCB layouts designed for either part will accommodate both, though the ROX3SJ2R7 provides a more compact footprint.

Q: What packaging options are available?

A: RSF3JB2R70 is supplied in bulk packaging. ROX3SJ2R7 is available in cut tape (CT) packaging. Both packaging formats are suitable for through-hole assembly processes.

Q: Are both parts compliant with environmental regulations?

A: Yes. Both RSF3JB2R70 and ROX3SJ2R7 are ROHS3 compliant. The RSF3JB2R70 is REACH unaffected, while the ROX3SJ2R7 has vendor undefined REACH status. Both carry EAR99 ECCN classification.