Equivalent & Substitute Parts for F20J30K

Part Overview

The F20J30K is a 30 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 production with 658 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained, enabling procurement flexibility and supply chain continuity.

Substiute Parts

F20J30K

OhmiteIn Stock: 756F20J30K Datasheet

Current PartRFQ

F20J30KE

OhmiteIn Stock: 1174F20J30KE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The F20J30KE qualifies as a parametric equivalent to the F20J30K based on the following criteria:

Electrical Parameters (Identical):

• Resistance value: 30 kOhms
• Tolerance: ±5%
• Power rating: 20W
• Temperature coefficient: ±260ppm/°C
• Operating temperature range: -55°C to 350°C

Mechanical Parameters (Identical):

• Composition: Wirewound
• Coating: Vitreous Enamel Coated
• Mounting feature: Flange Braces, Right Angle
• Lead style: Solder Lugs
• Package type: Radial, Flat Oval
• Height seated: 0.375" (9.53mm)

Physical Dimension Variance: The F20J30KE has a length of 2.000" (50.80mm) compared to the F20J30K at 0.750" (19.05mm). This dimensional difference does not affect electrical performance but may impact board layout and mechanical fit.

Parameter Comparison

Engineering Selection Recommendations

F20J30K Selection Criteria:

• Applications where board space is constrained and the 0.750" length is required
• Designs where RoHS non-compliance is acceptable or not a regulatory requirement
• Existing designs currently specified with this part number

F20J30KE Selection Criteria:

• New designs requiring ROHS3 compliance
• Applications where regulatory compliance with RoHS3 standards is mandatory
• Supply chain scenarios where the higher inventory level (1100 units) provides procurement advantage
• Designs where the extended 2.000" length does not create layout conflicts

Both parts maintain identical electrical performance and core mechanical characteristics. The primary differentiators are physical length, RoHS compliance status, and inventory availability.

Frequently Asked Questions (FAQ)

Q: Can F20J30KE replace F20J30K in existing designs? A: Electrical substitution is valid. Physical board layout must be verified due to the length difference (0.750" vs 2.000"). Mounting hole spacing and clearance requirements must be confirmed before implementation.

Q: What is the impact of the length difference on circuit performance? A: The length difference does not affect electrical performance. Both parts have identical resistance, tolerance, power rating, and temperature characteristics. The difference is purely mechanical and affects only board layout and physical fit.

Q: Are there compliance implications when switching between these parts? A: Yes. The F20J30K is RoHS non-compliant, while the F20J30KE is ROHS3 compliant. Design transitions to F20J30KE may be required to meet regulatory requirements in specific markets or applications.

Q: What is the moisture sensitivity difference between these parts? A: The F20J30K lists MSL as Not Applicable, while F20J30KE is rated MSL 1 (Unlimited). This indicates the F20J30KE has no moisture sensitivity restrictions during storage and handling.

Q: Which part should be selected for new designs? A: For new designs, F20J30KE is recommended due to ROHS3 compliance and higher inventory availability, provided the 2.000" length accommodates the board layout.