RSF3JB18K0 Equivalent & Substitute Parts

Part Overview

The RSF3JB18K0 is an 18 kOhms ±5% 3W through-hole resistor manufactured by Stackpole Electronics Inc. It features a metal oxide film composition with flame retardant coating and safety design, suitable for applications requiring reliable power dissipation in the 3W range. The part is currently active in production with ROHS3 compliance and maintains an operating temperature range of -55°C to 235°C. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to inventory constraints, supply chain considerations, or application-specific performance needs.

Substiute Parts

RSF3JB18K0

Stackpole Electronics IncIn Stock: 978RSF3JB18K0 Datasheet

Current PartRFQ

ROX3SJ18K

TE Connectivity Passive ProductIn Stock: 12087ROX3SJ18K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RSF3JB18K0 is determined by the following critical parameters:

• Resistance Value: 18 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)
• RoHS Compliance: ROHS3 Compliant (minimum requirement)

The ROX3SJ18K manufactured by TE Connectivity Passive Product meets all critical electrical and mechanical parameters. Both parts are metal oxide film axial resistors with identical resistance, tolerance, and power specifications. Both maintain ROHS3 compliance and feature safety-rated designs suitable for equivalent circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the RSF3JB18K0 and ROX3SJ18K are active production parts with ROHS3 compliance, making them suitable for equivalent circuit applications. The primary differences are dimensional and thermal characteristics. The RSF3JB18K0 offers a higher maximum operating temperature (235°C vs. 200°C) and lower temperature coefficient (±200ppm/°C vs. ±350ppm/°C), while the ROX3SJ18K is physically smaller. Selection between these parts should be based on specific application requirements regarding thermal performance, available board space, and operating temperature limits. Both parts are electrically equivalent for standard 18 kOhms 3W applications.

Frequently Asked Questions (FAQ)

Q: Can ROX3SJ18K be used as a direct replacement for RSF3JB18K0?

A: Yes, for applications where the operating temperature does not exceed 200°C and the smaller physical dimensions are compatible with board layout. Both parts share identical electrical specifications (18 kOhms, ±5%, 3W) and metal oxide film composition.

Q: What are the physical dimension differences?

A: The RSF3JB18K0 measures 0.236" diameter x 0.689" length (6.00mm x 17.50mm), while the ROX3SJ18K measures 0.217" diameter x 0.630" length (5.50mm x 16.00mm). The ROX3SJ18K is smaller in both diameter and length.

Q: Are there temperature performance differences?

A: Yes. The RSF3JB18K0 operates to 235°C with a temperature coefficient of ±200ppm/°C, while the ROX3SJ18K operates to 200°C with a temperature coefficient of ±350ppm/°C. Applications requiring operation above 200°C must use the RSF3JB18K0.

Q: Do both parts meet RoHS requirements?

A: Yes, both the RSF3JB18K0 and ROX3SJ18K are ROHS3 compliant.

Q: What is the packaging difference?

A: The RSF3JB18K0 is supplied in bulk packaging, while the ROX3SJ18K is supplied in cut tape (CT) packaging. Both are axial package types suitable for through-hole assembly.