F40J1R0 Equivalent & Substitute Parts

Part Overview

The F40J1R0 is a 1 Ohm ±5% 40W 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 850 pieces available in new original stock.

Substitute parts are identified when they maintain identical electrical specifications and mechanical compatibility while offering alternative packaging configurations or improved compliance status.

Substiute Parts

F40J1R0

OhmiteIn Stock: 888F40J1R0 Datasheet

Current PartRFQ

F40J1R0E

OhmiteIn Stock: 1470F40J1R0E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the F40J1R0 is determined by strict equivalence across the following critical parameters:

• Resistance value: 1 Ohms
• Tolerance: ±5%
• Power rating: 40W
• Composition: Wirewound
• Temperature coefficient: ±400ppm/°C
• Operating temperature range: -55°C ~ 350°C
• Coating type: Vitreous Enamel Coated
• Mounting configuration: Flange Braces, Right Angle
• Physical dimensions: 2.000" L x 1.000" W (50.80mm x 25.40mm)
• Height seated: 0.563" (14.29mm) maximum
• Lead style: Solder Lugs
• Package type: Radial, Flat Oval

The F40J1R0E qualifies as a parametric equivalent because it maintains all electrical and mechanical specifications while differing only in packaging configuration (Bulk versus standard packaging).

Parameter Comparison

Engineering Selection Recommendations

Both F40J1R0 and F40J1R0E 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 factors:

F40J1R0 is appropriate for applications where standard packaging is preferred and RoHS non-compliant components are acceptable per design requirements.

F40J1R0E is the preferred selection for applications requiring RoHS compliance. This variant maintains all electrical and thermal performance characteristics while meeting RoHS standards. The bulk packaging configuration offers advantages for high-volume production environments. Inventory availability is higher for F40J1R0E (1360 pieces versus 850 pieces).

Both parts are suitable for direct substitution in circuit designs without modification to PCB layouts, thermal management strategies, or electrical calculations.

Frequently Asked Questions (FAQ)

Q: Can F40J1R0E be used as a direct replacement for F40J1R0?

A: Yes. The F40J1R0E maintains identical electrical specifications (1 Ohm ±5%, 40W), thermal characteristics (±400ppm/°C, -55°C to 350°C operating range), and mechanical dimensions (2.000" L x 1.000" W, 0.563" height). No circuit modifications are required.

Q: What is the difference between F40J1R0 and F40J1R0E?

A: The primary differences are packaging configuration (standard versus bulk) and compliance status. F40J1R0E is RoHS compliant while F40J1R0 is RoHS non-compliant. All functional and mechanical parameters are identical.

Q: Does the packaging difference affect component performance?

A: No. Packaging configuration (standard versus bulk) does not affect electrical performance, thermal dissipation, or mechanical reliability. The difference is administrative and relates to supply chain handling.

Q: Which part should be selected for new designs?

A: F40J1R0E is recommended for new designs due to RoHS compliance status and higher inventory availability. Both parts are active production components suitable for long-term supply.

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

A: No. Both parts have identical power ratings (40W), temperature coefficients (±400ppm/°C), operating temperature ranges (-55°C to 350°C), and resistance values (1 Ohm ±5%).

Q: Can these parts be used interchangeably in existing assemblies?

A: Yes. The identical physical dimensions, mounting configuration (flange braces, right angle), and lead style (solder lugs) ensure mechanical and electrical interchangeability without PCB modification.