Ohmite 41J47RE Equivalent & Substitute Parts

Part Overview

The Ohmite 41J47RE is a 1W wirewound axial resistor with 47 Ohms nominal resistance and ±5% tolerance, part of the Ohmicone® 40 series. This component is designed for through-hole applications requiring reliable power dissipation in industrial and commercial electronics. The part maintains Active product status with full RoHS compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when design requirements demand improved tolerance specifications or alternative packaging configurations while maintaining core electrical and mechanical compatibility.

Substiute Parts

41J47RE

OhmiteIn Stock: 90441J47RE Datasheet

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41F47RE

OhmiteIn Stock: 78441F47RE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 41J47RE is determined by the following critical parameters:

• Resistance Value: Must be 47 Ohms (no deviation permitted)
• Power Rating: Must be 1W (electrical stress equivalence)
• Package Type: Must be Axial (mechanical and PCB compatibility)
• Physical Dimensions: Must match 0.126" Dia × 0.437" L (board layout and thermal management)
• Composition: Wirewound (thermal and frequency response characteristics)
• Temperature Coefficient: ±20ppm/°C (stability requirements)
• Termination Count: 2 leads (circuit topology compatibility)

The substitute part 41F47RE qualifies as an equivalent because it maintains all critical parameters while offering improved tolerance specification (±1% versus ±5%). This represents an upgrade path for applications requiring tighter resistance accuracy without requiring design modification.

Parameter Comparison

Engineering Selection Recommendations

41J47RE Selection: Choose this part for applications where ±5% tolerance meets circuit requirements and standard packaging (Box) is acceptable. Active product status ensures long-term availability. RoHS compliance and MSL 1 rating support standard manufacturing and storage environments.

41F47RE Selection: Choose this substitute when circuit design requires ±1% tolerance accuracy without modifying PCB layout or thermal management strategy. The tighter tolerance provides improved performance in precision applications while maintaining identical electrical stress ratings and physical form factor. ROHS3 compliance and Bulk packaging support high-volume production environments. Both parts share identical temperature coefficient and operating range, ensuring equivalent thermal behavior.

Frequently Asked Questions (FAQ)

Q: Can 41F47RE directly replace 41J47RE in existing designs? A: Yes. Both parts are identical in resistance value, power rating, package type, physical dimensions, and temperature characteristics. The 41F47RE offers improved tolerance (±1% vs ±5%) with no design modification required.

Q: What is the significance of the tolerance difference? A: Tolerance defines the acceptable resistance variation from nominal value. The 41F47RE's ±1% tolerance provides tighter resistance accuracy compared to the 41J47RE's ±5% tolerance. Selection depends on circuit accuracy requirements. Both tolerances are within the Ohmicone® 40 series specification.

Q: Are packaging differences between Box and Bulk significant? A: Packaging format (Box vs Bulk) affects order quantity and handling but does not impact electrical or mechanical performance. Both formats contain identical components suitable for through-hole assembly.

Q: Do both parts meet RoHS requirements? A: Yes. The 41J47RE is RoHS Compliant and the 41F47RE is ROHS3 Compliant. Both meet current environmental and hazardous substance restrictions for electronic components.

Q: What is MSL 1 rating and why does it matter? A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture control requirements. The 41J47RE carries this rating. Standard storage conditions are suitable for both parts.

Q: Can these parts be used interchangeably in high-temperature applications? A: Yes. Both parts operate across -55°C to 275°C range with identical ±20ppm/°C temperature coefficient, ensuring equivalent thermal stability and performance in extreme temperature environments.