45J30R Equivalent & Substitute Parts

Part Overview

The 45J30R is a 30 Ohm, 5W axial wirewound through-hole resistor manufactured by Ohmite as part of the Ohmicone® 40 series. This component is designed for applications requiring precision resistance with moderate power dissipation in compact form factors. The part maintains active product status with 784 units currently in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across packaging and compliance variations.

Substiute Parts

45J30R

OhmiteIn Stock: 88645J30R Datasheet

Current PartRFQ

45J30RE

OhmiteIn Stock: 99345J30RE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 45J30RE qualifies as a parametric equivalent to the 45J30R based on the following criteria:

Electrical Equivalence: Both parts maintain identical resistance value (30 Ohms), tolerance (±5%), power rating (5W), composition (wirewound), and temperature coefficient (±20ppm/°C).

Mechanical Compatibility: Both components share the same axial package configuration with identical physical dimensions (0.343" Dia x 0.937" L / 8.70mm x 23.80mm) and two terminations, ensuring direct form-fit-function compatibility in circuit board layouts.

Functional Interchangeability: The substitution is based solely on matching electrical performance parameters and mechanical envelope specifications. Packaging format differs (tape/reel versus bulk), but this does not affect electrical or mechanical performance in the application.

Parameter Comparison

Engineering Selection Recommendations

45J30R Selection: Choose this part when RoHS non-compliant components are acceptable for the application and when the specific Ohmicone® 40 series designation is required by design specification.

45J30RE Selection: This substitute provides RoHS compliance and a defined operating temperature range (-55°C ~ 275°C), making it suitable for applications with environmental or regulatory compliance requirements. Higher inventory availability (978 units) supports production scheduling needs.

Both parts maintain identical electrical and mechanical specifications, ensuring direct substitution capability without circuit redesign or board layout modification.

Frequently Asked Questions (FAQ)

Q: Can 45J30RE replace 45J30R in existing designs? A: Yes. Both parts are electrically and mechanically equivalent with identical resistance, tolerance, power rating, composition, and physical dimensions. Direct substitution is possible without circuit modification.

Q: What is the difference between these two part numbers? A: The primary differences are packaging format (45J30R in tape/reel versus 45J30RE in bulk), RoHS compliance status (45J30RE is RoHS compliant), and specified operating temperature range (45J30RE specifies -55°C ~ 275°C). Electrical and mechanical performance are identical.

Q: Are the physical dimensions identical? A: Yes. Both parts share the same axial package configuration with dimensions of 0.343" Dia x 0.937" L (8.70mm x 23.80mm), ensuring identical board layout compatibility.

Q: Which part should be selected for new designs? A: Selection depends on compliance requirements. For RoHS-compliant applications, 45J30RE is the appropriate choice. For non-compliant applications, either part is suitable based on availability and packaging requirements.

Q: Do these parts have the same temperature coefficient? A: Yes. Both parts maintain a temperature coefficient of ±20ppm/°C, ensuring equivalent performance stability across temperature variations.