Ohmite 45FR75 Equivalent & Substitute Parts

Part Overview

The Ohmite 45FR75 is a 750 mOhms ±1% 5W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production and maintains 883 pieces in new original stock. Finding equivalent and substitute parts is necessary to ensure design flexibility, optimize procurement strategies, and maintain supply chain continuity when the primary part number becomes unavailable or when alternative packaging or compliance requirements are needed.

Substiute Parts

45FR75

OhmiteIn Stock: 94745FR75 Datasheet

Current PartRFQ

45FR75E

OhmiteIn Stock: 123345FR75E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Ohmite 45FR75 is determined by strict equivalence across the following critical parameters:

• Resistance value: 750 mOhms
• Tolerance: ±1%
• Power rating: 5W
• Composition: Wirewound
• Package: Axial
• Temperature coefficient: ±90ppm/°C
• Physical dimensions: 0.343" Dia x 0.937" L (8.70mm x 23.80mm)
• Termination count: 2

The substitute part 45FR75E maintains identical electrical and mechanical specifications, with differences limited to packaging format (bulk versus standard) and compliance certifications. Both parts are manufactured by Ohmite and belong to the same product series.

Parameter Comparison

Engineering Selection Recommendations

Both the 45FR75 and 45FR75E are active production parts manufactured by Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on the following factors:

45FR75: Select this part number when standard packaging is required and RoHS non-compliant components are acceptable for your application.

45FR75E: Select this part number when RoHS compliance is mandatory for your design or when bulk packaging aligns with procurement requirements. This variant offers superior compliance status with RoHS certification and defined moisture sensitivity level (MSL 1).

Both parts carry ECCN EAR99 classification and are REACH unaffected. The choice between these substitutes does not affect electrical performance, thermal characteristics, or mechanical fit within the specified axial package envelope.

Frequently Asked Questions (FAQ)

Q: Can 45FR75E be used as a direct replacement for 45FR75?

A: Yes. The 45FR75E is a direct electrical and mechanical equivalent. Both parts share identical resistance (750 mOhms), tolerance (±1%), power rating (5W), temperature coefficient (±90ppm/°C), and physical dimensions (0.343" Dia x 0.937" L). The primary differences are packaging format and RoHS compliance status.

Q: What is the difference between standard and bulk packaging?

A: Standard packaging (45FR75) and bulk packaging (45FR75E) refer to the quantity and presentation method for procurement. Both contain the same component with identical specifications. Bulk packaging typically accommodates larger order quantities and may offer cost advantages for high-volume applications.

Q: Does RoHS compliance affect component performance?

A: No. RoHS compliance is a regulatory and material composition requirement, not a performance specification. The 45FR75E meets RoHS standards through material selection while maintaining identical electrical and thermal characteristics to the non-compliant 45FR75.

Q: Are these parts interchangeable in PCB designs?

A: Yes. Both parts use identical axial package geometry (0.343" Dia x 0.937" L / 8.70mm x 23.80mm) with two terminations. No PCB layout modifications are required when substituting between 45FR75 and 45FR75E.

Q: What is MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 indicates the lowest moisture sensitivity level, meaning the component can be stored indefinitely without special moisture control measures. This applies only to the 45FR75E; the 45FR75 lists MSL as Not Applicable.

Q: Which part should I specify for new designs?

A: Selection depends on regulatory requirements. For applications requiring RoHS compliance, specify 45FR75E. For applications without RoHS mandates, either part is acceptable based on packaging and procurement preferences.