Ohmite 40J400 Equivalent & Substitute Parts

Part Overview

The Ohmite 40J400 is a 400 Ohm, 5% tolerance, 10W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is currently active in production and maintains inventory availability of 872 pieces. The 40J400 is designed for applications requiring precision power dissipation in compact axial form factors. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required, particularly when RoHS compliance or alternative packaging configurations are necessary for procurement or regulatory requirements.

Substiute Parts

40J400

OhmiteIn Stock: 96740J400 Datasheet

Current PartRFQ

40J400E

OhmiteIn Stock: 82740J400E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 40J400 is determined by strict equivalence across the following critical parameters:

• Resistance value: 400 Ohms
• Tolerance: ±5%
• Power dissipation capability: 10W
• Composition: Wirewound
• Package configuration: Axial through-hole
• Temperature coefficient: ±20ppm/°C
• Physical dimensions: 0.406" Dia x 1.902" L (10.30mm x 48.30mm)
• Number of terminations: 2

The 40J400E is classified as a parametric equivalent. It maintains identical electrical specifications and mechanical form factor while differing in packaging configuration (Bulk versus standard) and RoHS compliance status. Both parts are manufactured by Ohmite and belong to the Ohmicone® 40 series.

Parameter Comparison

Engineering Selection Recommendations

Selection between the 40J400 and 40J400E is determined by regulatory and procurement requirements:

The 40J400 is suitable for applications where RoHS non-compliance is acceptable or where standard packaging is specified. The part maintains active production status and carries full inventory availability.

The 40J400E is the appropriate selection for designs requiring ROHS3 compliance. Both parts are electrically and mechanically identical, ensuring direct functional interchangeability. The 40J400E is supplied in Bulk packaging configuration, which may influence procurement workflows and minimum order quantities.

Both parts carry identical REACH and ECCN classifications (REACH Unaffected, EAR99), ensuring equivalent export and regulatory treatment.

Frequently Asked Questions (FAQ)

Q: Are the 40J400 and 40J400E electrically interchangeable?

A: Yes. Both parts share identical resistance (400 Ohms), tolerance (±5%), power rating (10W), temperature coefficient (±20ppm/°C), and wirewound composition. They are parametric equivalents.

Q: What is the difference between the 40J400 and 40J400E?

A: The primary differences are RoHS compliance status (40J400 is non-compliant; 40J400E is ROHS3 compliant) and packaging configuration (40J400 uses standard packaging; 40J400E uses Bulk packaging).

Q: Can the 40J400E be used as a direct replacement for the 40J400 in existing designs?

A: Yes, provided that RoHS compliance requirements do not conflict with the original design specification. The physical dimensions, electrical characteristics, and mechanical form factor are identical.

Q: Are there any dimensional differences between these parts?

A: No. Both parts maintain identical physical dimensions of 0.406" Dia x 1.902" L (10.30mm x 48.30mm) and are housed in axial through-hole packages with 2 terminations.

Q: Which part should be selected for new designs?

A: Selection depends on regulatory requirements. For designs requiring RoHS3 compliance, the 40J400E is the appropriate choice. For applications without RoHS compliance mandates, either part is suitable based on availability and packaging preferences.

Q: Do these parts have different temperature operating ranges?

A: Operating temperature data is not provided in the component specifications for either part. Both maintain identical temperature coefficient specifications of ±20ppm/°C.