Ohmite 40F30R Equivalent & Substitute Parts

Part Overview

The Ohmite 40F30R is a 30 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. Substitute parts are identified when the original part becomes unavailable, when alternative packaging is required, or when compliance upgrades are necessary for specific applications.

Substiute Parts

40F30R

OhmiteIn Stock: 86340F30R Datasheet

Current PartRFQ

40F30RE

OhmiteIn Stock: 115540F30RE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Ohmite 40F30RE is classified as a parametric equivalent to the 40F30R. Substitution is valid based on the following criteria:

• Identical resistance value: 30 Ohms
• Identical tolerance: ±1%
• Identical power rating: 10W
• Identical composition: Wirewound
• Identical package type: Axial
• Identical temperature coefficient: ±20ppm/°C
• Identical physical dimensions: 0.406" Dia x 1.902" L (10.30mm x 48.30mm)
• Identical number of terminations: 2

The primary difference between these parts is packaging format (standard vs. bulk) and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

Both the 40F30R and 40F30RE are active production parts from Ohmite's Ohmicone® 40 series with identical electrical and mechanical specifications. Selection between these parts should be based on:

• RoHS compliance requirements: The 40F30RE is ROHS3 compliant, while the 40F30R is RoHS non-compliant. Applications subject to RoHS regulations must use the 40F30RE.
• Packaging requirements: The 40F30R is supplied in standard packaging, while the 40F30RE is supplied in bulk packaging. Choose based on procurement and inventory management needs.
• Availability: Both parts are in active production with current inventory. The 40F30RE has higher current stock levels (1133 pcs vs. 828 pcs).

Frequently Asked Questions (FAQ)

Q: Can the 40F30RE be used as a direct replacement for the 40F30R?

A: Yes. Both parts are electrically and mechanically identical with the same resistance value (30 Ohms), tolerance (±1%), power rating (10W), composition (wirewound), package type (axial), and physical dimensions (0.406" Dia x 1.902" L). The 40F30RE is ROHS3 compliant, making it suitable for applications with RoHS requirements.

Q: What is the difference between the 40F30R and 40F30RE?

A: The primary differences are packaging format and RoHS compliance. The 40F30R uses standard packaging and is RoHS non-compliant. The 40F30RE uses bulk packaging and is ROHS3 compliant. All electrical and mechanical parameters are identical.

Q: Are there any dimensional differences between these parts?

A: No. Both parts have identical physical dimensions of 0.406" Dia x 1.902" L (10.30mm x 48.30mm) and are housed in the same axial package type.

Q: Which part should I select for a new design?

A: For new designs, the 40F30RE is recommended due to its ROHS3 compliance status, which aligns with current regulatory requirements and ensures broader market compatibility.

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

A: Yes, provided that the assembly does not have specific packaging or compliance constraints. Both parts meet identical electrical specifications and fit the same physical footprint.