Ohmite F20J500 Equivalent & Substitute Parts

Part Overview

The Ohmite F20J500 is a 500 Ohms ±5% 20W wirewound chassis mount resistor from the Stackohm® 250 series. This component is designed for high-power applications requiring reliable thermal dissipation and mechanical stability through flange-braced mounting. The part is currently active in production with 950 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and compliance requirements across different manufacturing and regulatory environments.

Substiute Parts

F20J500

OhmiteIn Stock: 989F20J500 Datasheet

Current PartRFQ

F20J500E

OhmiteIn Stock: 978F20J500E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the F20J500 is determined by strict equivalence across the following critical parameters:

• Resistance value: 500 Ohms
• Tolerance: ±5%
• Power rating: 20W
• Composition: Wirewound
• Temperature coefficient: ±260ppm/°C
• Operating temperature range: -55°C to 350°C
• Coating type: Vitreous Enamel Coated
• Mounting configuration: Flange Braces, Right Angle
• Lead style: Solder Lugs
• Package type: Radial, Flat Oval

The F20J500E qualifies as a parametric equivalent based on identical electrical and mechanical specifications. Dimensional variations in length (0.750" vs. 2.000") do not affect functional substitution when mounting space permits the larger envelope. Packaging differences (tape/reel vs. bulk) and compliance certifications represent procurement and regulatory distinctions rather than functional limitations.

Parameter Comparison

Engineering Selection Recommendations

Both F20J500 and F20J500E are active production components from Ohmite's Stackohm® 250 series with identical electrical and mechanical specifications. Selection between these parts should be based on the following criteria:

F20J500 is suitable for applications where RoHS compliance is not a regulatory requirement and standard packaging (tape/reel) is acceptable.

F20J500E is required for applications subject to ROHS3 compliance mandates. This variant offers improved regulatory alignment while maintaining full electrical and mechanical equivalence. The extended length (2.000" vs. 0.750") requires verification of available mounting space in the target application.

Both parts operate across the full temperature range of -55°C to 350°C and maintain identical resistance tolerance, power dissipation capability, and thermal stability characteristics.

Frequently Asked Questions (FAQ)

Q: Can F20J500E be used as a direct replacement for F20J500?

A: Yes, provided mounting space accommodates the increased length of 2.000" (50.80mm). All electrical parameters, power rating, temperature performance, and mechanical mounting features are identical.

Q: What is the primary difference between F20J500 and F20J500E?

A: The F20J500E is ROHS3 compliant, while the F20J500 is RoHS non-compliant. The F20J500E also features a longer body length (2.000" vs. 0.750") and bulk packaging instead of tape/reel.

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

A: No. Both parts share identical power ratings (20W), temperature coefficients (±260ppm/°C), and operating temperature ranges (-55°C to 350°C). Thermal dissipation characteristics are equivalent.

Q: Does the dimensional difference affect circuit performance?

A: No. The length difference does not impact electrical performance. Physical mounting space must be verified to ensure the larger envelope of the F20J500E fits within the application's layout constraints.

Q: Which part should be selected for new designs?

A: Selection depends on regulatory requirements. For applications requiring ROHS3 compliance, specify F20J500E. For applications without RoHS mandates, either part is functionally equivalent.

Q: Are both parts available in the same packaging formats?

A: No. F20J500 is supplied in tape/reel packaging, while F20J500E is supplied in bulk packaging. Procurement and handling procedures may differ accordingly.