Ohmite 40F20R Equivalent & Substitute Parts

Part Overview

The Ohmite 40F20R is a 20 Ohm, 1% tolerance, 10W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision resistance with high power dissipation in a compact axial package. The part is currently active in production with 746 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

40F20R

OhmiteIn Stock: 80140F20R Datasheet

Current PartRFQ

40F20RE

OhmiteIn Stock: 98540F20RE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the Ohmite 40F20R is determined by strict equivalence across the following critical parameters:

• Resistance value: 20 Ohms
• Tolerance: ±1%
• Power rating: 10W
• Composition: Wirewound
• Package configuration: Axial
• Temperature coefficient: ±20ppm/°C
• Physical dimensions: 0.406" Dia x 1.902" L (10.30mm x 48.30mm)
• Termination count: 2

The substitute part 40F20RE meets all electrical and mechanical specifications required for direct substitution. Differences in packaging format (Bulk vs. standard) and RoHS compliance status do not affect functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the 40F20R and 40F20RE are active production components from Ohmite's Ohmicone® 40 series with identical electrical and mechanical specifications. Selection between these parts should be based on regulatory and compliance requirements specific to the application:

The 40F20RE offers ROHS3 compliance, making it suitable for applications subject to RoHS directives. The 40F20R, while RoHS non-compliant, remains available for applications where RoHS compliance is not a requirement. Both parts maintain REACH Unaffected status and EAR99 export classification.

Inventory availability should also inform selection: 40F20R has 746 units in stock, while 40F20RE has 901 units in stock.

Frequently Asked Questions (FAQ)

Q: Can the 40F20RE be used as a direct replacement for the 40F20R?

A: Yes. The 40F20RE is electrically and mechanically equivalent to the 40F20R. Both parts have identical resistance (20 Ohms), tolerance (±1%), power rating (10W), temperature coefficient (±20ppm/°C), and axial package dimensions (0.406" Dia x 1.902" L). Direct substitution is supported without circuit modification.

Q: What is the difference between the 40F20R and 40F20RE?

A: The primary differences are packaging format and RoHS compliance status. The 40F20R is supplied in standard packaging and is RoHS non-compliant. The 40F20RE is supplied in Bulk packaging and is ROHS3 compliant. All electrical and mechanical parameters are identical.

Q: Does the packaging difference (standard vs. Bulk) affect compatibility?

A: No. Packaging format refers to the quantity and presentation method for procurement and inventory management. The individual component specifications and performance characteristics remain unchanged. Both formats contain the same Ohmite 40F20R or 40F20RE resistor.

Q: Which part should I select for RoHS-regulated applications?

A: The 40F20RE is ROHS3 compliant and is the appropriate selection for applications subject to RoHS directives. The 40F20R is RoHS non-compliant and should be used only in applications where RoHS compliance is not required.

Q: Are there any performance differences between these parts?

A: No. Both parts are manufactured by Ohmite to the same specifications. Electrical performance, temperature stability, and reliability characteristics are identical across all rated parameters.