RSF3JB33K0 Equivalent & Substitute Parts

Part Overview

The RSF3JB33K0 is a 33 kOhms ±5% 3W through-hole resistor manufactured by Stackpole Electronics Inc. This axial 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 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

RSF3JB33K0

Stackpole Electronics IncIn Stock: 1057RSF3JB33K0 Datasheet

Current PartRFQ

RSMF3JT33K0

Stackpole Electronics IncIn Stock: 1077RSMF3JT33K0 Datasheet

MFR RecommendedRFQ

ROX3SJ33K

TE Connectivity Passive ProductIn Stock: 96129ROX3SJ33K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RSF3JB33K0 is determined by strict equivalence in the following parameters:

• Resistance value: 33 kOhms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 3W (exact match required)
• Composition: Metal Oxide Film (exact match required)
• Package type: Axial (exact match required)
• Number of terminations: 2 (exact match required)

Substitute parts must maintain these core electrical and mechanical specifications. Variations in physical dimensions, temperature coefficient, maximum operating temperature, packaging format (bulk vs. cut tape), and surface features (flame retardant vs. flame proof) are permitted within the scope of functional equivalence, provided the primary electrical parameters remain unchanged.

Parameter Comparison

Engineering Selection Recommendations

All three parts—RSF3JB33K0, RSMF3JT33K0, and ROX3SJ33K—meet the core electrical requirements for 33 kOhms ±5% 3W axial metal oxide film resistors. Selection between these parts should be based on the following factors:

RSF3JB33K0 is the primary part with the highest maximum operating temperature (235°C) and is available in bulk packaging. This configuration is suitable for high-temperature applications and high-volume procurement scenarios.

RSMF3JT33K0 is a Stackpole Electronics alternative with identical electrical specifications and operating temperature range. It is available in cut tape packaging, which is appropriate for automated assembly processes and lower-volume applications. Physical dimensions are slightly reduced compared to the primary part.

ROX3SJ33K is a TE Connectivity alternative that meets all core electrical specifications. It features pulse withstanding capability and is available in cut tape packaging. The maximum operating temperature is 200°C (lower than the primary part by 35°C), and the temperature coefficient is ±350ppm/°C (higher than the primary part by 150ppm/°C). This part is suitable for applications where pulse withstanding is required and operating temperatures do not exceed 200°C.

All parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across applications.

Frequently Asked Questions (FAQ)

Q: Can RSMF3JT33K0 be used as a direct replacement for RSF3JB33K0?

A: Yes. Both parts share identical electrical specifications: 33 kOhms ±5% tolerance, 3W power rating, metal oxide film composition, and -55°C to 235°C operating temperature range. The primary differences are packaging format (cut tape vs. bulk) and physical dimensions. Axial package compatibility is maintained, allowing direct substitution in through-hole applications.

Q: What are the limitations of ROX3SJ33K as a substitute?

A: ROX3SJ33K meets all core electrical requirements but has two parameter differences: maximum operating temperature of 200°C (versus 235°C for the primary part) and temperature coefficient of ±350ppm/°C (versus ±200ppm/°C). Applications operating above 200°C or requiring tighter temperature stability should use RSF3JB33K0 or RSMF3JT33K0 instead.

Q: Does packaging format affect electrical performance?

A: No. Bulk and cut tape packaging formats do not affect electrical performance. The choice between formats depends on assembly process requirements: bulk packaging is suitable for manual assembly and high-volume procurement, while cut tape packaging is optimized for automated pick-and-place assembly systems.

Q: Are physical dimension differences significant for PCB layout?

A: Physical dimensions vary slightly between parts. RSF3JB33K0 measures 0.236" diameter × 0.689" length, while RSMF3JT33K0 and ROX3SJ33K measure 0.217" diameter × 0.591" and 0.630" length respectively. All parts are axial configuration and fit standard through-hole spacing. Verify PCB hole spacing and component clearance if switching between parts with different dimensions.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. RSF3JB33K0, RSMF3JT33K0, and ROX3SJ33K are all ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and use.