RSF3JB1K00 Equivalent & Substitute Parts

Part Overview

The RSF3JB1K00 is a 1 kOhms ±5% 3W axial through-hole resistor manufactured by Stackpole Electronics Inc. It features metal oxide film composition with flame retardant coating and safety characteristics. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required for design flexibility, inventory management, or supply chain continuity.

Substiute Parts

RSF3JB1K00

Stackpole Electronics IncIn Stock: 873RSF3JB1K00 Datasheet

Current PartRFQ

ROX3SJ1K0

TE Connectivity Passive ProductIn Stock: 2358ROX3SJ1K0 Datasheet

MFR RecommendedRFQ

SQP500JB-1K

YAGEOIn Stock: 2255SQP500JB-1K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RSF3JB1K00 are qualified based on the following critical parameters:

• Resistance value: 1 kOhms (exact match required)
• Tolerance: ±5% (exact match required)
• Package type: Axial (mechanical compatibility)
• Composition: Metal Oxide Film (electrical performance characteristics)
• RoHS compliance: ROHS3 Compliant (regulatory requirement)

Two substitute parts meet these core criteria with allowable variations in power rating, physical dimensions, and operating temperature range. These variations are acceptable within standard engineering practice for through-hole resistor substitution.

Parameter Comparison

Engineering Selection Recommendations

All three parts are Active status and ROHS3 compliant, meeting current regulatory requirements.

ROX3SJ1K0 (TE Connectivity) maintains closest electrical equivalence to the RSF3JB1K00 with identical 3W power rating and metal oxide film composition. Physical dimensions are slightly smaller. Operating temperature maximum is reduced to 200°C. Temperature coefficient is higher at ±350ppm/°C compared to ±200ppm/°C.

SQP500JB-1K (YAGEO) provides higher power rating at 5W with cement composition instead of metal oxide film. Physical dimensions are significantly larger in rectangular form factor. Operating temperature maximum is reduced to 155°C. This part is suitable for applications requiring higher power dissipation capability.

Selection between substitutes depends on circuit thermal requirements, available board space, and operating temperature constraints.

Frequently Asked Questions (FAQ)

Q: Can ROX3SJ1K0 directly replace RSF3JB1K00 in all applications?

A: ROX3SJ1K0 matches the critical electrical parameters (1 kOhms, ±5%, 3W, metal oxide film, axial package). Physical dimensions are slightly smaller. The reduced operating temperature maximum (200°C vs 235°C) and higher temperature coefficient (±350ppm/°C vs ±200ppm/°C) must be evaluated against circuit requirements.

Q: Why is SQP500JB-1K listed as a substitute if it has 5W instead of 3W?

A: Higher power rating is acceptable in substitution. The 5W rating provides additional thermal margin. However, the cement composition differs from metal oxide film, and the significantly larger rectangular form factor may not fit existing board layouts. Operating temperature maximum is also reduced to 155°C.

Q: Are all three parts mechanically compatible with the same PCB footprint?

A: All three parts use axial package type with two terminations. However, physical dimensions differ. RSF3JB1K00 and ROX3SJ1K0 have similar cylindrical dimensions and are mechanically compatible. SQP500JB-1K has a larger rectangular form factor and requires different board spacing.

Q: What is the impact of different temperature coefficients?

A: RSF3JB1K00 has ±200ppm/°C while ROX3SJ1K0 has ±350ppm/°C. In circuits with tight tolerance requirements or wide operating temperature ranges, the higher temperature coefficient of ROX3SJ1K0 may introduce greater resistance drift.

Q: Are all parts RoHS compliant?

A: Yes. RSF3JB1K00, ROX3SJ1K0, and SQP500JB-1K are all ROHS3 compliant.