Equivalent & Substitute Parts for F30J2K0E

Part Overview

The F30J2K0E is a 2 kOhms ±5% 30W wirewound chassis mount resistor manufactured by Ohmite, part of the Stackohm® 250 series. This component is designed for applications requiring precision resistance with high power dissipation capability in a compact chassis-mounted form factor. The part is currently active in production with full RoHS3 compliance and REACH unaffected status. Substitute parts are identified when operational requirements demand increased power handling capacity while maintaining electrical and mechanical compatibility.

Substiute Parts

F30J2K0E

OhmiteIn Stock: 788F30J2K0E Datasheet

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F55J2K0E

OhmiteIn Stock: 1080F55J2K0E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the F30J2K0E is permissible with the F55J2K0E based on the following criteria:

Electrical Parameters (Must Match):

• Resistance value: 2 kOhms
• Tolerance: ±5%
• Temperature coefficient: ±260ppm/°C
• Operating temperature range: -55°C to 350°C

Mechanical Parameters (Must Match):

• Composition: Wirewound
• Coating: Vitreous Enamel Coated
• Mounting feature: Flange Braces, Right Angle
• Lead style: Solder Lugs
• Package type: Radial, Flat Oval
• Height seated (maximum): 0.563" (14.29mm)

Allowable Variation:

• Power rating: F55J2K0E provides 55W versus 30W in the original part. This represents an upgrade in power dissipation capacity while maintaining all other electrical and mechanical specifications.

The F55J2K0E is a direct substitute when circuit design permits the use of a higher power-rated component in the same mounting configuration.

Parameter Comparison

Engineering Selection Recommendations

Both the F30J2K0E and F55J2K0E are active production components with identical RoHS3 compliance and REACH unaffected status. Selection between these parts is determined by circuit power dissipation requirements:

• F30J2K0E is specified for applications with maximum power dissipation of 30W at the 2 kOhm resistance value.
• F55J2K0E is selected when circuit analysis indicates power dissipation exceeding 30W but within the 55W capability, or when design margin for thermal stress is required.

Both components maintain identical electrical performance characteristics and mounting compatibility. The choice between them is based solely on thermal design requirements and available power budget in the application.

Frequently Asked Questions (FAQ)

Q: Can F55J2K0E replace F30J2K0E in any application?

A: The F55J2K0E is electrically and mechanically compatible with F30J2K0E. However, substitution is appropriate only when the circuit design permits use of a higher power-rated component. Physical space constraints and thermal management considerations must be evaluated, as the F55J2K0E has a longer length (4.600" versus 1.250").

Q: Are there any electrical performance differences between these parts?

A: No. Both parts share identical resistance value (2 kOhms), tolerance (±5%), temperature coefficient (±260ppm/°C), and operating temperature range (-55°C to 350°C). The only difference is power dissipation rating.

Q: Do both parts use the same mounting configuration?

A: Yes. Both parts feature flange braces with right-angle mounting, solder lugs, and identical seated height of 0.563" (14.29mm). The primary dimensional difference is length, which increases with the higher power rating.

Q: Are compliance certifications identical?

A: Yes. Both F30J2K0E and F55J2K0E are RoHS3 compliant and REACH unaffected, meeting the same regulatory requirements.

Q: What determines whether substitution is valid?

A: Substitution is valid when: (1) circuit power dissipation does not exceed 55W, (2) physical space accommodates the longer 4.600" length of the F55J2K0E, and (3) thermal management design is compatible with the substitute component's thermal characteristics.