F20J400 Equivalent & Substitute Parts

Part Overview

The F20J400 is a 400 Ohms ±5% 20W wirewound chassis mount resistor manufactured by Ohmite, part of 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 production with 1014 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained, allowing for procurement flexibility, inventory optimization, or compliance requirement fulfillment.

Substiute Parts

F20J400

OhmiteIn Stock: 1112F20J400 Datasheet

Current PartRFQ

F20J400E

OhmiteIn Stock: 889F20J400E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the F20J400 are identified based on strict electrical and mechanical parameter matching. The critical substitution criteria are:

• Resistance value: 400 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 F20J400E meets all these criteria and is classified as a parametric equivalent. Physical dimensions may vary within the same package classification while maintaining functional equivalence for circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both F20J400 and F20J400E are active production components from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on compliance requirements and packaging needs.

The F20J400E offers ROHS3 compliance, making it suitable for applications subject to RoHS regulations. The F20J400 is RoHS non-compliant and should be selected only when RoHS compliance is not a requirement.

Packaging differs between the two parts: F20J400 is supplied in standard packaging, while F20J400E is supplied in bulk packaging. This distinction may affect procurement workflows and inventory management strategies.

Both parts maintain identical electrical performance across the full operating temperature range and are suitable for high-power dissipation applications requiring stable resistance characteristics.

Frequently Asked Questions (FAQ)

Q: Can F20J400E be used as a direct replacement for F20J400?

A: Yes. Both parts share identical electrical specifications (400 Ohms ±5%, 20W, ±260ppm/°C temperature coefficient, -55°C to 350°C operating range) and mechanical mounting features (Flange Braces, Right Angle, Solder Lugs, Radial Flat Oval package). The primary difference is RoHS compliance status and packaging format.

Q: What is the key difference between F20J400 and F20J400E?

A: The F20J400E is ROHS3 compliant, while the F20J400 is RoHS non-compliant. The F20J400E is supplied in bulk packaging, whereas the F20J400 uses standard packaging. All electrical and mechanical parameters are identical.

Q: Should I select F20J400E if RoHS compliance is required?

A: Yes. If your application or market requires RoHS compliance, the F20J400E is the appropriate selection. It maintains all electrical and mechanical specifications of the F20J400 while meeting ROHS3 requirements.

Q: Are there physical dimension differences between these parts?

A: Both parts are classified as Radial, Flat Oval package type with identical height specifications (0.375" seated maximum). The F20J400 has a length of 0.750" (19.05mm), while the F20J400E has a length of 2.000" (50.80mm). These dimensional differences do not affect electrical equivalence but may impact PCB layout considerations.

Q: What is the moisture sensitivity level difference?

A: The F20J400 has MSL listed as Not Applicable, while the F20J400E has MSL 1 (Unlimited). This indicates the F20J400E can be stored and handled without moisture-related restrictions.