Ohmite 45J75RE Equivalent & Substitute Parts

Part Overview

The Ohmite 45J75RE is a 75 Ohms ±5% 5W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is designed for applications requiring precision power dissipation in compact form factors. The part maintains Active product status with 790 units in current inventory. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required, particularly when tolerance specifications or packaging formats differ from the original design requirement.

Substiute Parts

45J75RE

OhmiteIn Stock: 83245J75RE Datasheet

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45F75RE

OhmiteIn Stock: 86545F75RE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The Ohmite 45F75RE qualifies as a direct substitute for the 45J75RE based on the following electrical and mechanical parameters:

Matching Parameters:

• Resistance value: 75 Ohms (identical)
• Power rating: 5W (identical)
• Composition: Wirewound (identical)
• Package type: Axial (identical)
• Physical dimensions: 0.343" Dia x 0.937" L (identical)
• Temperature coefficient: ±20ppm/°C (identical)
• Series: Ohmicone® 40 (identical)

Differentiating Parameters:

• Tolerance: 45F75RE provides ±1% tolerance versus ±5% tolerance of 45J75RE
• Packaging format: 45F75RE supplied in Bulk versus Box packaging for 45J75RE
• RoHS certification: 45F75RE meets ROHS3 Compliant versus RoHS Compliant for 45J75RE

The 45F75RE represents an upgrade path when tighter tolerance specifications (±1%) are required while maintaining identical power dissipation and thermal characteristics.

Parameter Comparison

Engineering Selection Recommendations

Selection between 45J75RE and 45F75RE depends on tolerance requirements and regulatory compliance needs:

Select 45J75RE when:

• ±5% tolerance specification is acceptable for the application
• Box packaging format is required for inventory management
• RoHS Compliant certification meets regulatory requirements

Select 45F75RE when:

• Tighter ±1% tolerance is required for precision circuit applications
• Bulk packaging format is compatible with assembly processes
• ROHS3 Compliant certification is mandated by design or regulatory standards

Both parts maintain identical electrical performance in power dissipation, thermal stability, and mechanical form factor. The choice between them is determined by tolerance specification and compliance certification requirements rather than functional capability.

Frequently Asked Questions (FAQ)

Q: Can 45F75RE replace 45J75RE in existing designs? A: Yes. The 45F75RE provides identical resistance value, power rating, and physical dimensions. The primary difference is improved tolerance (±1% versus ±5%), which represents a functional upgrade. Designs tolerating ±5% specifications will operate identically with the ±1% substitute.

Q: What is the significance of the tolerance difference between these parts? A: Tolerance defines the maximum deviation from the nominal 75 Ohm resistance value. The 45J75RE allows ±3.75 Ohms deviation (±5%), while 45F75RE allows ±0.75 Ohms deviation (±1%). Applications requiring precise impedance matching or tight circuit tuning benefit from the 45F75RE's narrower tolerance band.

Q: Are the physical dimensions identical between both parts? A: Yes. Both 45J75RE and 45F75RE measure 0.343" diameter by 0.937" length (8.70mm x 23.80mm). They are mechanically interchangeable in PCB layouts and through-hole mounting applications.

Q: What is the difference between RoHS Compliant and ROHS3 Compliant? A: ROHS3 Compliant represents the current RoHS 3 directive standard (2011/65/EU as amended by 2015/863/EU), which includes restrictions on additional substances beyond the original RoHS standard. Both certifications indicate lead-free and hazardous substance compliance; ROHS3 represents the more recent regulatory framework.

Q: Does packaging format affect electrical performance? A: No. Box and Bulk packaging formats are logistics and inventory management distinctions only. They do not affect the electrical characteristics, performance, or reliability of the resistor components themselves.