F20J50K Equivalent & Substitute Parts

Part Overview

The F20J50K is a 50 kOhms ±5% 20W wirewound chassis mount resistor manufactured by Ohmite, part of the Stackohm® 250 series. This component is designed for applications requiring high power dissipation with stable resistance values across extended temperature ranges. The part is currently Active in product status. Substitute parts may be required due to packaging preferences, inventory availability, or compliance requirements specific to end-use applications.

Substiute Parts

F20J50K

OhmiteIn Stock: 698F20J50K Datasheet

Current PartRFQ

F20J50KE

OhmiteIn Stock: 1181F20J50KE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the F20J50K is determined by strict equivalence across the following critical parameters:

• Resistance value: 50 kOhms
• Tolerance: ±5%
• Power rating: 20W
• Composition: Wirewound
• Temperature coefficient: ±260ppm/°C
• Operating temperature range: -55°C to 350°C
• Coating/housing type: Vitreous Enamel Coated
• Mounting feature: Flange Braces, Right Angle
• Lead style: Solder Lugs
• Package/case: Radial, Flat Oval

The F20J50KE meets all electrical and mechanical parameters required for direct substitution. Differences in physical dimensions and packaging format do not affect functional equivalence within the specified parameter set.

Parameter Comparison

Engineering Selection Recommendations

Both F20J50K and F20J50KE are Active products from Ohmite's Stackohm® 250 series with identical electrical and core mechanical specifications. Selection between these parts should be based on the following factors:

RoHS Compliance: The F20J50KE is ROHS3 compliant, while the F20J50K is RoHS non-compliant. Applications subject to RoHS directives or customer requirements for RoHS compliance must use the F20J50KE.

Physical Dimensions: The F20J50K measures 0.750" L x 0.375" W, while the F20J50KE measures 2.000" L x 0.375" W. PCB layout constraints and available mounting space determine which variant is suitable for a given application.

Packaging Format: The F20J50K is supplied in standard packaging, while the F20J50KE is supplied in Bulk packaging. Procurement volume and inventory management practices may influence packaging selection.

Frequently Asked Questions (FAQ)

Q: Can F20J50KE be used as a direct replacement for F20J50K in all applications?

A: The F20J50KE is electrically and mechanically equivalent to the F20J50K across all specified parameters. Physical dimensions differ; verify that the larger length (2.000" vs 0.750") accommodates your PCB layout. RoHS compliance status differs; confirm compliance requirements for your application.

Q: What is the significance of the different physical dimensions between these parts?

A: Both parts maintain identical height (0.375") and width (0.375"), with length being the only dimensional difference. This variation does not affect electrical performance or mounting compatibility with flange braces and right-angle mounting features. PCB layout must accommodate the specific length of the selected variant.

Q: Why does the F20J50KE have ROHS3 compliance while the F20J50K does not?

A: RoHS compliance status reflects manufacturing process and material composition differences. The F20J50KE meets ROHS3 standards; the F20J50K does not. Applications requiring RoHS compliance must specify the F20J50KE.

Q: Are there any performance differences between these parts?

A: No. Both parts share identical resistance value, tolerance, power rating, temperature coefficient, operating temperature range, composition, and coating type. Performance in circuit operation is equivalent.

Q: What does Moisture Sensitivity Level 1 (Unlimited) mean for the F20J50KE?

A: MSL 1 indicates the component has unlimited shelf life under standard storage conditions without requiring special moisture control measures. The F20J50K lists MSL as Not Applicable.