Ohmite 40J40R Equivalent & Substitute Parts

Part Overview

The Ohmite 40J40R is a 40 Ohm, 5% tolerance, 10W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is currently active in production and maintains 1114 pieces in new original stock. The 40J40R is specified for applications requiring precision resistive elements with wirewound construction and axial lead configuration. Substitute parts are identified when packaging, compliance status, or inventory availability necessitate alternative sourcing while maintaining identical electrical and mechanical performance.

Substiute Parts

40J40R

OhmiteIn Stock: 119740J40R Datasheet

Current PartRFQ

40J40RE

OhmiteIn Stock: 184440J40RE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 40J40RE qualifies as a parametric equivalent to the 40J40R based on strict electrical and mechanical compatibility criteria. Both parts share identical specifications across all critical substitution parameters: 40 Ohm resistance value, ±5% tolerance, 10W power rating, wirewound composition, axial package configuration, ±20ppm/°C temperature coefficient, and matching physical dimensions of 0.406" Dia x 1.902" L (10.30mm x 48.30mm). The primary distinction between these parts is packaging format (Bulk for 40J40RE versus standard for 40J40R) and RoHS compliance status (ROHS3 Compliant for 40J40RE versus RoHS non-compliant for 40J40R). Both parts maintain identical electrical performance and mechanical fit within the same circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the 40J40R and 40J40RE are active production components suitable for direct substitution in 40 Ohm, 10W axial wirewound resistor applications. Selection between these parts should be based on regulatory compliance requirements and packaging specifications. The 40J40RE offers ROHS3 compliance, making it the appropriate choice for applications subject to RoHS directives. The 40J40R remains suitable for applications without RoHS compliance mandates. Both parts deliver identical electrical performance, mechanical fit, and thermal characteristics. Inventory availability favors the 40J40RE with 1798 pieces in stock compared to 1114 pieces for the 40J40R.

Frequently Asked Questions (FAQ)

Q: Can the 40J40RE directly replace the 40J40R in existing designs? A: Yes. Both parts are electrically and mechanically identical, sharing the same 40 Ohm resistance, ±5% tolerance, 10W power rating, wirewound construction, axial package, and physical dimensions. Direct substitution is valid for all circuit applications.

Q: What is the difference between the 40J40R and 40J40RE? A: The primary differences are packaging format (Bulk for 40J40RE) and RoHS compliance status. The 40J40RE is ROHS3 compliant, while the 40J40R is RoHS non-compliant. All electrical and mechanical specifications are identical.

Q: Which part should I specify for new designs? A: For applications requiring RoHS compliance, specify the 40J40RE. For applications without RoHS mandates, either part is acceptable. Both maintain identical performance characteristics.

Q: Are there any thermal or performance differences between these parts? A: No. Both parts share identical temperature coefficients of ±20ppm/°C and deliver the same 10W power dissipation capability in the same axial package configuration.

Q: Does packaging format affect circuit performance? A: No. Packaging format (Bulk versus standard) does not affect electrical performance or mechanical compatibility. The physical component dimensions and electrical specifications remain identical.