Equivalent & Substitute Parts for F30J2K5E

Part Overview

The F30J2K5E is a 30W wirewound chassis mount resistor manufactured by Ohmite, part of the Stackohm® 250 series. This component is rated at 2.5 kOhms with ±5% tolerance and features vitreous enamel coating for thermal management. The part is currently active in production with 981 units in stock. Substitute parts are identified when application requirements demand higher power dissipation capability or extended operating temperature ranges while maintaining identical electrical specifications.

Substiute Parts

F30J2K5E

OhmiteIn Stock: 1091F30J2K5E Datasheet

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F55J2K5E

OhmiteIn Stock: 993F55J2K5E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The F55J2K5E qualifies as a direct substitute for the F30J2K5E based on the following criteria:

Electrical specifications remain identical: 2.5 kOhms resistance, ±5% tolerance, and ±260ppm/°C temperature coefficient. Both components utilize wirewound construction with vitreous enamel coating and identical mounting features (flange braces, right angle). The primary distinction is power rating elevation from 30W to 55W, which represents an upgrade path for applications requiring higher thermal dissipation. Both parts maintain the same physical package classification (radial, flat oval) and lead configuration (solder lugs). Operating temperature range extends to -55°C minimum on the F55J2K5E, compared to the F30J2K5E specification of 350°C maximum only.

Parameter Comparison

Engineering Selection Recommendations

Both the F30J2K5E and F55J2K5E are active production components with full regulatory compliance. The F30J2K5E is suitable for applications with power dissipation requirements up to 30W. The F55J2K5E provides increased power handling capacity at 55W and is recommended for circuits where thermal margin or future design headroom is required. Both components maintain RoHS compliance; the F55J2K5E carries ROHS3 certification. Physical dimensions differ due to power rating differences, with the F55J2K5E measuring 4.600" L x 1.000" W compared to the F30J2K5E at 1.250" L x 1.000" W. Height remains consistent at 0.563" maximum for both variants. Selection between these parts depends solely on the circuit's power dissipation requirement and available mounting space.

Frequently Asked Questions (FAQ)

Q: Can the F55J2K5E replace the F30J2K5E in all applications?

A: The F55J2K5E is electrically and mechanically compatible with the F30J2K5E for all applications where the F30J2K5E is currently used. The higher power rating of the F55J2K5E does not create incompatibility. Physical dimensions differ; verify available mounting space before substitution.

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

A: The F55J2K5E provides 55W power rating compared to the F30J2K5E at 30W. All electrical parameters, including resistance, tolerance, and temperature coefficient, remain identical. The F55J2K5E is physically larger to accommodate the increased power dissipation capability.

Q: Are both parts RoHS compliant?

A: Yes. The F30J2K5E is RoHS Compliant. The F55J2K5E is ROHS3 Compliant. Both meet regulatory requirements for restricted substance elimination.

Q: What is the operating temperature range for each part?

A: The F30J2K5E operates to a maximum of 350°C. The F55J2K5E operates from -55°C to 350°C, providing extended low-temperature capability.

Q: Do these parts use the same mounting configuration?

A: Yes. Both components feature flange braces with right-angle mounting and solder lug lead style. Physical footprint differs due to length variation, but mounting method and lead configuration are identical.