F30J400 Equivalent & Substitute Parts

Part Overview

The F30J400 is a 400 Ohms ±5% 30W 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 983 units in stock. Equivalent parts are necessary when packaging requirements differ, compliance certifications must be updated, or inventory availability fluctuates across distribution channels.

Substiute Parts

F30J400

OhmiteIn Stock: 1054F30J400 Datasheet

Current PartRFQ

F30J400E

OhmiteIn Stock: 775F30J400E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The F30J400E qualifies as a parametric equivalent to the F30J400 based on identical electrical and mechanical specifications. Both parts share the same resistance value (400 Ohms), tolerance (±5%), power rating (30W), composition (wirewound), temperature coefficient (±260ppm/°C), operating temperature range (-55°C to 350°C), coating type (vitreous enamel), mounting configuration (flange braces, right angle), physical dimensions (1.250" L × 1.000" W), seated height (0.563"), lead style (solder lugs), and package type (radial, flat oval). The primary distinction between these parts is packaging format and compliance certification status. The F30J400E is supplied in bulk packaging and carries ROHS3 compliance with MSL rating of 1 (unlimited), whereas the F30J400 is supplied in standard packaging and is RoHS non-compliant.

Parameter Comparison

Engineering Selection Recommendations

Selection between F30J400 and F30J400E depends on regulatory and procurement requirements. The F30J400E is the preferred choice for applications subject to RoHS3 compliance mandates, as it meets current environmental regulations. Both parts maintain identical electrical performance and mechanical compatibility, ensuring direct substitution in circuit designs without functional degradation. The F30J400E's bulk packaging format is suitable for high-volume manufacturing environments, while the F30J400's standard packaging may be appropriate for lower-volume or prototype applications. Inventory availability should be evaluated against project timelines, as current stock levels differ between variants.

Frequently Asked Questions (FAQ)

Q: Can F30J400E replace F30J400 in existing designs? A: Yes. Both parts are electrically and mechanically identical, sharing the same 400 Ohm resistance, ±5% tolerance, 30W power rating, temperature coefficient, operating range, physical dimensions, and mounting configuration. Direct substitution is possible without circuit redesign.

Q: What is the primary difference between these parts? A: The F30J400E is supplied in bulk packaging and carries ROHS3 compliance certification, while the F30J400 uses standard packaging and is RoHS non-compliant. All electrical and mechanical parameters are identical.

Q: Does packaging format affect performance? A: No. Packaging format (standard versus bulk) does not affect electrical performance or mechanical function. The choice depends on procurement volume and supply chain requirements.

Q: Is the F30J400E suitable for RoHS-regulated applications? A: Yes. The F30J400E is ROHS3 compliant and carries an MSL rating of 1 (unlimited), making it suitable for applications subject to RoHS environmental regulations.

Q: Are there any thermal or reliability differences? A: No. Both parts share identical temperature coefficients (±260ppm/°C), operating temperature ranges (-55°C to 350°C), and vitreous enamel coating specifications, ensuring equivalent thermal performance and reliability.

Q: Which part should be selected for new designs? A: For new designs, the F30J400E is recommended due to its ROHS3 compliance status and alignment with current regulatory standards. Both parts are active in production and available in stock.