RSF3JB33R0 Equivalent & Substitute Parts

Part Overview

The RSF3JB33R0 is a 33 Ohm, 5%, 3W axial through-hole resistor manufactured by Stackpole Electronics Inc. This metal oxide film resistor features flame retardant coating and safety design, operating across a temperature range of -55°C to 235°C. The part is currently active in production with 724 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part becomes unavailable or when alternative packaging formats are required.

Substiute Parts

RSF3JB33R0

Stackpole Electronics IncIn Stock: 769RSF3JB33R0 Datasheet

Current PartRFQ

RSMF3JT33R0

Stackpole Electronics IncIn Stock: 827RSMF3JT33R0 Datasheet

MFR RecommendedRFQ

ROX3SJ33R

TE Connectivity Passive ProductIn Stock: 76642ROX3SJ33R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RSF3JB33R0 are qualified based on the following critical parameters:

• Resistance value: 33 Ohms (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)
• Operating temperature range: Minimum -55°C, maximum ≥200°C
• RoHS compliance: ROHS3 Compliant (required)
• Termination count: 2 (exact match required)

All identified substitutes meet these core electrical and mechanical criteria. Variations in physical dimensions, temperature coefficient, and specific safety features (flame retardant vs. flame proof) are noted but do not disqualify substitution eligibility within the defined parameter set.

Parameter Comparison

Engineering Selection Recommendations

All three parts—RSF3JB33R0, RSMF3JT33R0, and ROX3SJ33R—are active production components with ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on the following factors:

RSF3JB33R0 (Primary Part): Bulk packaging format. Highest maximum operating temperature (235°C). Flame retardant coating with safety design. Temperature coefficient ±200ppm/°C. Suitable for applications requiring maximum thermal headroom and bulk procurement.

RSMF3JT33R0 (Stackpole Alternative): Cut tape packaging. Identical electrical specifications to RSF3JB33R0 (±200ppm/°C, -55°C ~ 235°C). Flame proof design. Recommended for automated assembly processes and tape-reel handling. Same manufacturer ensures consistency in design and performance.

ROX3SJ33R (TE Connectivity Alternative): Cut tape packaging. Temperature coefficient ±350ppm/°C (higher drift). Maximum operating temperature 200°C (lower than primary part). Flame proof with pulse withstanding capability. Recommended for applications where pulse withstanding performance is required and operating temperature does not exceed 200°C. Higher inventory availability (76,610 units).

Frequently Asked Questions (FAQ)

Q: Can ROX3SJ33R be used in place of RSF3JB33R0 in all applications?

A: ROX3SJ33R meets the core electrical parameters (33 Ohms, ±5%, 3W, metal oxide film, axial package). However, it has a lower maximum operating temperature (200°C vs. 235°C) and higher temperature coefficient (±350ppm/°C vs. ±200ppm/°C). Use ROX3SJ33R only if your application operates below 200°C and can tolerate the higher temperature coefficient.

Q: What is the difference between flame retardant and flame proof?

A: Both RSF3JB33R0 (flame retardant) and RSMF3JT33R0/ROX3SJ33R (flame proof) are safety-rated designs. The specific safety classification depends on application requirements and regulatory standards. Consult your design specifications to determine which classification is required.

Q: Does packaging format affect electrical performance?

A: No. Bulk (RSF3JB33R0) and cut tape (RSMF3JT33R0, ROX3SJ33R) packaging formats do not affect electrical performance. Packaging selection is driven by assembly process requirements and inventory management practices.

Q: Are physical dimension differences significant?

A: Physical dimensions vary slightly between parts. RSF3JB33R0 is 6.00mm diameter × 17.50mm length. RSMF3JT33R0 is 5.50mm diameter × 15.00mm length. ROX3SJ33R is 5.50mm diameter × 16.00mm length. Verify PCB layout and mechanical clearances before substitution.

Q: Which substitute part has the best availability?

A: ROX3SJ33R has the highest inventory (76,610 units). RSMF3JT33R0 has 760 units. RSF3JB33R0 has 724 units. Availability should be verified with your supplier for current stock levels.