Equivalent & Substitute Parts for F55J5K0

Part Overview

The F55J5K0 is a 5 kOhms ±5% 55W wirewound chassis mount resistor manufactured by Ohmite, part of 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 866 units in stock. Substitute parts are identified when packaging configurations or compliance requirements differ while maintaining identical electrical and mechanical specifications.

Substiute Parts

F55J5K0

OhmiteIn Stock: 888F55J5K0 Datasheet

Current PartRFQ

F55J5K0E

OhmiteIn Stock: 1231F55J5K0E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the F55J5K0 is determined by equivalence across all critical electrical and mechanical parameters: resistance value, tolerance, power rating, temperature coefficient, operating temperature range, composition, coating type, mounting configuration, physical dimensions, and lead style. The F55J5K0E qualifies as a parametric equivalent because it maintains identical specifications across all these parameters. The substitution differs only in packaging format (Bulk versus standard packaging) and compliance certifications (RoHS3 compliance and MSL rating versus non-compliant status).

Parameter Comparison

Engineering Selection Recommendations

Both F55J5K0 and F55J5K0E are active production components from Ohmite with identical electrical and mechanical performance. Selection between these parts should be based on compliance requirements and packaging needs. The F55J5K0E provides RoHS3 compliance and defined moisture sensitivity level (MSL 1 - Unlimited), making it suitable for applications subject to environmental or regulatory restrictions. The F55J5K0 is appropriate for applications without such compliance mandates. Inventory availability favors F55J5K0E with 1205 units in stock compared to 866 units for F55J5K0. Both parts carry identical ECCN (EAR99) and HTSUS (8533.29.0000) classifications.

Frequently Asked Questions (FAQ)

Q: Can F55J5K0E replace F55J5K0 in existing designs? A: Yes. The F55J5K0E is electrically and mechanically identical to F55J5K0. All critical parameters including resistance, tolerance, power rating, temperature coefficient, operating range, dimensions, and mounting configuration are equivalent. Substitution is direct.

Q: What is the difference between F55J5K0 and F55J5K0E? A: The primary differences are packaging format (Bulk for F55J5K0E) and compliance certifications. F55J5K0E is RoHS3 compliant with MSL 1 rating, while F55J5K0 is RoHS non-compliant. Electrical and mechanical specifications are identical.

Q: Which part should be selected for new designs? A: For new designs, F55J5K0E is recommended due to active production status, higher inventory availability (1205 units), and RoHS3 compliance, which aligns with current environmental standards.

Q: Are there any thermal or mechanical differences between these parts? A: No. Both parts have identical temperature coefficients (±260ppm/°C), operating temperature range (-55°C to 350°C), vitreous enamel coating, flange-braced mounting, and physical dimensions (4.600" L × 1.000" W, 0.563" height seated).

Q: What does MSL 1 (Unlimited) mean for F55J5K0E? A: MSL 1 indicates the component has unlimited shelf life under uncontrolled storage conditions, requiring no special moisture control measures during handling or storage.