Ohmite F20J10R Equivalent & Substitute Parts

Part Overview

The Ohmite F20J10R is a 10 Ohms ±5% 20W wirewound chassis mount resistor from the Stackohm® 250 series, designed for high-power applications requiring reliable thermal dissipation and mechanical stability. This component is classified as Active product status and is currently in production. Substitute parts may be required due to inventory availability, packaging preferences, or compliance requirements specific to end-use applications.

Substiute Parts

F20J10R

OhmiteIn Stock: 1081F20J10R Datasheet

Current PartRFQ

F20J10RE

OhmiteIn Stock: 894F20J10RE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The F20J10RE qualifies as a parametric equivalent to the F20J10R based on identical electrical specifications: 10 Ohms resistance, ±5% tolerance, 20W power rating, wirewound composition, ±400ppm/°C temperature coefficient, and -55°C to 350°C operating temperature range. Both components feature vitreous enamel coating, flange braces with right-angle mounting, solder lugs, and radial flat oval packaging.

The primary differences between these parts are physical dimensions and compliance certifications. The F20J10R measures 0.750" L × 0.375" W (19.05mm × 9.53mm), while the F20J10RE measures 2.000" L × 0.375" W (50.80mm × 9.53mm). The F20J10RE is packaged in bulk format and carries RoHS3 compliance with MSL 1 (Unlimited), whereas the F20J10R is RoHS non-compliant with non-applicable MSL rating.

Substitution is valid when dimensional constraints permit the larger footprint and when RoHS3 compliance is required or beneficial for the application.

Parameter Comparison

Engineering Selection Recommendations

Both the F20J10R and F20J10RE are Active products manufactured by Ohmite and share identical electrical and thermal characteristics. Selection between these parts is determined by three factors:

Compliance Requirements: The F20J10RE is RoHS3 compliant with MSL 1 (Unlimited), making it suitable for applications subject to RoHS directives or customer specifications requiring environmental compliance. The F20J10R is RoHS non-compliant and should be selected only when compliance is not a requirement.

Physical Space Constraints: The F20J10R occupies a smaller footprint at 0.750" length compared to the F20J10RE at 2.000" length. Both maintain identical width and height. PCB layout constraints may necessitate the F20J10R in space-restricted applications.

Packaging Format: The F20J10RE is supplied in bulk packaging, while the F20J10R packaging format is not specified. Bulk packaging may offer cost advantages for high-volume production runs.

Frequently Asked Questions (FAQ)

Q: Are the F20J10R and F20J10RE electrically interchangeable?

A: Yes. Both components have identical resistance values (10 Ohms), tolerance (±5%), power rating (20W), temperature coefficient (±400ppm/°C), and operating temperature range (-55°C to 350°C). Electrical performance is equivalent.

Q: What is the primary difference between these two parts?

A: The main differences are physical dimensions and compliance certifications. The F20J10RE is longer (2.000" vs. 0.750") and carries RoHS3 compliance, while the F20J10R is RoHS non-compliant.

Q: Can I use the F20J10RE in place of the F20J10R in a space-constrained design?

A: No. The F20J10RE's increased length (2.000" vs. 0.750") may not fit in designs optimized for the F20J10R's smaller footprint. Verify PCB layout compatibility before substitution.

Q: Which part should I select for RoHS-compliant applications?

A: The F20J10RE is RoHS3 compliant and should be used for applications requiring environmental compliance certification.

Q: Are both parts currently available?

A: Yes. Both the F20J10R (1034 pcs in stock) and F20J10RE (860 pcs in stock) are Active products with current inventory.