Ohmite 45J27R Equivalent & Substitute Parts

Part Overview

The Ohmite 45J27R is a 27 Ohm, 5% tolerance, 5W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision power dissipation in compact form factors. The part is currently active in production with 962 units in stock. Alternative equivalent parts may be required due to packaging preferences, compliance requirements, or inventory availability.

Substiute Parts

45J27R

OhmiteIn Stock: 100945J27R Datasheet

Current PartRFQ

45J27RE

OhmiteIn Stock: 117145J27RE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 45J27R is determined by strict equivalence across the following critical parameters:

• Resistance value: 27 Ohms
• Tolerance: ±5%
• Power rating: 5W
• Composition: Wirewound
• Package configuration: Axial
• Temperature coefficient: ±20ppm/°C
• Physical dimensions: 0.343" Dia x 0.937" L (8.70mm x 23.80mm)
• Termination count: 2

The substitute part 45J27RE meets all these criteria and is therefore a direct parametric equivalent. Differences in packaging format (bulk vs. standard) and compliance certifications do not affect electrical or mechanical interchangeability.

Parameter Comparison

Engineering Selection Recommendations

Both the 45J27R and 45J27RE are active production components from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on the following factors:

45J27R is suitable for applications where standard packaging is preferred and RoHS non-compliance is acceptable for the end application.

45J27RE is the appropriate choice for applications requiring RoHS compliance, bulk packaging formats, or operating environments with defined moisture sensitivity requirements (MSL 1). The extended operating temperature range of -55°C to 275°C provides additional thermal margin compared to the main part specification.

Both parts carry the same ECCN classification (EAR99) and are suitable for equivalent circuit applications without modification to board layout or thermal management design.

Frequently Asked Questions (FAQ)

Q: Are the 45J27R and 45J27RE electrically identical?

A: Yes. Both parts have identical resistance (27 Ohms), tolerance (±5%), power rating (5W), temperature coefficient (±20ppm/°C), and composition (wirewound). They are direct parametric equivalents.

Q: Can I substitute 45J27RE for 45J27R on an existing PCB design?

A: Yes. The physical dimensions (0.343" Dia x 0.937" L) and axial package configuration are identical, allowing direct board-level substitution without layout modification.

Q: What is the difference in packaging between these parts?

A: The 45J27R uses standard packaging, while the 45J27RE is supplied in bulk format. This affects order quantities and handling but does not impact electrical performance or mechanical fit.

Q: Does RoHS compliance affect performance?

A: No. RoHS compliance status reflects manufacturing process and material composition but does not alter the electrical or thermal characteristics of the resistor. Selection should be based on end-product regulatory requirements.

Q: What is the operating temperature range for these parts?

A: The 45J27R specification does not define an operating temperature range. The 45J27RE operates from -55°C to 275°C. For applications requiring defined thermal limits, the 45J27RE provides explicit temperature specifications.

Q: Are both parts suitable for high-reliability applications?

A: Both parts are active production components from Ohmite. Selection for high-reliability applications should be based on specific failure rate requirements, which are not provided in the standard datasheets for these components.