Equivalent & Substitute Parts for Ohmite F20J2R0

Part Overview

The Ohmite F20J2R0 is a 2 Ohms ±5% 20W wirewound chassis mount resistor from 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 with 714 units in stock. Substitute parts may be required due to application-specific power requirements, compliance needs, or inventory constraints.

Substiute Parts

F20J2R0

OhmiteIn Stock: 748F20J2R0 Datasheet

Current PartRFQ

F10J2R0E

OhmiteIn Stock: 1190F10J2R0E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The F10J2R0E qualifies as a parametric equivalent based on the following matching criteria:

• Identical resistance value: 2 Ohms
• Identical tolerance: ±5%
• Identical composition: Wirewound
• Identical temperature coefficient: ±400ppm/°C
• Identical operating temperature range: -55°C to 350°C
• Identical coating/housing type: Vitreous Enamel Coated
• Identical mounting feature: Flange Braces, Right Angle
• Identical physical dimensions: 0.750" L x 0.375" W (19.05mm x 9.53mm)
• Identical lead style: Solder Lugs
• Identical package/case: Radial, Flat Oval
• Same manufacturer: Ohmite
• Same series: Stackohm® 250

The primary difference is the power rating: F10J2R0E is rated at 10W versus the F20J2R0's 20W rating. This substitution is valid for applications where the actual power dissipation does not exceed 10W.

Parameter Comparison

Engineering Selection Recommendations

The F10J2R0E serves as a direct substitute for the F20J2R0 when power dissipation requirements do not exceed 10W. Both parts maintain identical electrical and mechanical specifications across all critical parameters including resistance, tolerance, temperature coefficient, and operating temperature range.

The F10J2R0E offers improved regulatory compliance, meeting ROHS3 standards compared to the F20J2R0's RoHS non-compliant status. This makes the F10J2R0E preferable for applications subject to RoHS3 requirements.

Selection between these parts should be based on actual circuit power dissipation. If the application requires power handling above 10W, the F20J2R0 is the appropriate choice. If power dissipation remains below 10W and RoHS3 compliance is required, the F10J2R0E is the suitable alternative.

Frequently Asked Questions (FAQ)

Q: Can the F10J2R0E replace the F20J2R0 in all applications?

A: The F10J2R0E can replace the F20J2R0 only when the actual power dissipation in the circuit does not exceed 10W. The electrical characteristics are identical; the difference is solely in power rating capacity.

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

A: The F20J2R0 is rated for 20W power dissipation, while the F10J2R0E is rated for 10W. All other specifications including resistance value, tolerance, temperature coefficient, dimensions, and mounting features are identical.

Q: Does the F10J2R0E have better compliance status?

A: Yes. The F10J2R0E is ROHS3 compliant, whereas the F20J2R0 is RoHS non-compliant. Both parts maintain REACH Unaffected status.

Q: Are the physical dimensions identical?

A: Yes. Both parts share identical dimensions of 0.750" L x 0.375" W (19.05mm x 9.53mm) and use the same Radial, Flat Oval package with Flange Braces, Right Angle mounting features.

Q: What is the temperature coefficient for both parts?

A: Both the F20J2R0 and F10J2R0E have a temperature coefficient of ±400ppm/°C and operate across the same temperature range of -55°C to 350°C.

Q: How do I determine which part to use?

A: Calculate the maximum power dissipation in your circuit using P = I²R or P = V²/R. If the result is 10W or less, either part can be used; the F10J2R0E is preferred if RoHS3 compliance is required. If power dissipation exceeds 10W, use the F20J2R0.