Ohmite 40JR30 300 mOhms 10W Axial Wirewound Resistor Equivalent & Substitute Parts

Part Overview

The Ohmite 40JR30 is a 300 mOhms ±5% 10W through-hole axial wirewound resistor from the Ohmicone® 40 series. This component is designed for applications requiring low-resistance, high-power dissipation in a compact axial package. The part is currently active in production with 1064 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

40JR30

OhmiteIn Stock: 109040JR30 Datasheet

Current PartRFQ

40JR30E

OhmiteIn Stock: 91940JR30E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 40JR30 is determined by the following critical parameters:

• Resistance value: 300 mOhms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 10W (exact match required)
• Composition: Wirewound (exact match required)
• Package: Axial (exact match required)
• Temperature coefficient: ±90ppm/°C (exact match required)
• Physical dimensions: 0.406" Dia x 1.902" L (exact match required)

The 40JR30E meets all substitution criteria as a parametric equivalent within the Ohmicone® 40 series, differing only in packaging configuration (bulk versus standard) and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the 40JR30 and 40JR30E are active production components from Ohmite's Ohmicone® 40 series with identical electrical and mechanical specifications. Selection between these parts should be based on compliance requirements:

• The 40JR30E is ROHS3 compliant, making it suitable for applications subject to RoHS regulations.
• The 40JR30 is RoHS non-compliant and appropriate for applications without RoHS requirements.
• Both parts carry identical ECCN (EAR99) and HTSUS (8533.21.0080) classifications.
• Packaging differs between standard and bulk configurations; verify procurement requirements before selection.

Frequently Asked Questions (FAQ)

Q: Can the 40JR30E replace the 40JR30 in all applications?

A: Yes, the 40JR30E is a direct parametric equivalent. All electrical characteristics, mechanical dimensions, and performance specifications are identical. Selection depends on RoHS compliance requirements and packaging needs.

Q: What is the difference between the 40JR30 and 40JR30E?

A: The primary differences are packaging configuration (standard versus bulk) and RoHS compliance status. The 40JR30E is ROHS3 compliant, while the 40JR30 is RoHS non-compliant. All electrical and mechanical parameters are identical.

Q: Are these parts interchangeable on a PCB?

A: Yes. Both parts feature identical axial package dimensions (0.406" Dia x 1.902" L), two terminations, and through-hole mounting. They are mechanically and electrically interchangeable.

Q: What determines substitution eligibility for this resistor?

A: Substitution requires exact matching of resistance value (300 mOhms), tolerance (±5%), power rating (10W), composition (wirewound), package type (axial), temperature coefficient (±90ppm/°C), and physical dimensions (0.406" Dia x 1.902" L).

Q: Which part should I select for new designs?

A: For new designs subject to RoHS regulations, select the 40JR30E. For applications without RoHS requirements, either part is acceptable based on availability and procurement preferences.