Ohmite 43J27RE Equivalent & Substitute Parts

Part Overview

The Ohmite 43J27RE is a 27 Ohm, 3W axial wirewound resistor with ±5% tolerance, part of the Ohmicone® 40 series. This component is designed for through-hole applications requiring moderate power dissipation and is currently in active production status. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and compliance certifications are maintained across the same resistance value and power rating.

Substiute Parts

43J27RE

OhmiteIn Stock: 94543J27RE Datasheet

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43F27RE

OhmiteIn Stock: 118243F27RE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 43J27RE is determined by the following criteria:

• Resistance value must remain 27 Ohms
• Power rating must be 3W or greater
• Package type must be Axial to maintain mechanical compatibility with PCB layouts
• Composition must be Wirewound to preserve thermal and electrical characteristics
• Temperature coefficient must be ±20ppm/°C or better
• RoHS3 compliance and REACH unaffected status must be maintained
• Physical dimensions must match or be compatible with existing board footprints

The 43F27RE qualifies as a direct substitute because it maintains all critical parameters while offering improved tolerance specification.

Parameter Comparison

Engineering Selection Recommendations

Both the 43J27RE and 43F27RE are active production components with full ROHS3 compliance and REACH unaffected status, making them suitable for regulated applications. The primary distinction is tolerance specification: the 43J27RE provides ±5% tolerance, while the 43F27RE offers ±1% tolerance. Selection between these parts depends on circuit accuracy requirements. Applications requiring tighter resistance tolerances should specify the 43F27RE. Both components are electrically and mechanically interchangeable within the same PCB layout, as they share identical power ratings, physical dimensions, and thermal characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 43F27RE replace the 43J27RE in existing designs? A: Yes. The 43F27RE is mechanically and electrically compatible. It maintains the same 3W power rating, axial package configuration, and physical dimensions. The primary difference is improved tolerance specification (±1% versus ±5%).

Q: What is the significance of tolerance differences between these parts? A: Tolerance defines the acceptable deviation from the nominal 27 Ohm resistance value. The 43J27RE allows ±1.35 Ohm deviation, while the 43F27RE allows ±0.27 Ohm deviation. Applications with strict impedance or gain requirements should use the tighter tolerance part.

Q: Are both parts suitable for high-temperature applications? A: Both components share an identical temperature coefficient of ±20ppm/°C. Operating temperature limits are not specified in the provided data. Consult the manufacturer's datasheet for maximum operating temperature ratings.

Q: Do these parts require different PCB footprints? A: No. Both parts use identical axial package dimensions (0.220" Dia x 0.594" L), requiring no PCB layout modifications for substitution.

Q: Are both parts compliant with environmental regulations? A: Yes. Both the 43J27RE and 43F27RE are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance restrictions.