Ohmite 45J180E Equivalent & Substitute Parts

Part Overview

The Ohmite 45J180E is a 180 Ohms ±5% 5W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is actively manufactured and widely used in applications requiring precision power dissipation in compact form factors. Finding equivalent or substitute parts may be necessary due to inventory constraints, supply chain considerations, or application-specific tolerance requirements.

Substiute Parts

45J180E

OhmiteIn Stock: 115745J180E Datasheet

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45F180E

OhmiteIn Stock: 90245F180E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 45J180E is determined by strict equivalence across the following parameters:

• Resistance value: 180 Ohms (exact match required)
• Power rating: 5W (exact match required)
• Package type: Axial wirewound (exact match required)
• Physical dimensions: 0.343" Dia x 0.937" L (exact match required)
• Temperature coefficient: ±20ppm/°C (exact match required)
• Compliance certifications: ROHS3 Compliant, REACH Unaffected (exact match required)

The Ohmite 45F180E qualifies as a direct substitute based on these parameters. The primary difference is tolerance specification: the 45F180E provides ±1% tolerance compared to the ±5% tolerance of the 45J180E. This represents an upgrade in precision while maintaining all other electrical and mechanical characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both the 45J180E and 45F180E are active products manufactured by Ohmite and maintain full ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on tolerance requirements specific to the application circuit. The 45J180E is suitable for applications where ±5% tolerance meets design specifications. The 45F180E provides tighter tolerance control at ±1%, making it appropriate for circuits requiring higher precision in resistance value. Both components are mechanically and electrically interchangeable within their respective tolerance classes.

Frequently Asked Questions (FAQ)

Q: Can the 45F180E replace the 45J180E in my circuit? A: Yes. The 45F180E is a direct mechanical and electrical substitute. The primary difference is tolerance specification (±1% versus ±5%). Verify that your circuit design can accommodate the tighter tolerance of the 45F180E, which may improve overall circuit performance.

Q: Are the physical dimensions identical between these parts? A: Yes. Both parts share identical dimensions of 0.343" Dia x 0.937" L (8.70mm x 23.80mm), ensuring identical PCB footprint and mounting characteristics.

Q: Do both parts meet the same compliance standards? A: Yes. Both the 45J180E and 45F180E are ROHS3 compliant and REACH unaffected, meeting equivalent environmental and regulatory requirements.

Q: What is the key difference between these two resistors? A: The tolerance specification differs: the 45J180E provides ±5% tolerance, while the 45F180E provides ±1% tolerance. All other electrical parameters, including resistance value, power rating, temperature coefficient, and package type, are identical.

Q: Can I use the 45J180E as a substitute for the 45F180E? A: The 45J180E can be used as a substitute only if your circuit design permits the wider ±5% tolerance. Applications requiring the tighter ±1% tolerance specification of the 45F180E should not use the 45J180E as a replacement.