37FD3745-F: Equivalent & Substitute Parts

Part Overview

The Cornell Dubilier Electronics (CDE) 37FD3745-F is a 45 µF film capacitor rated for 370V AC operation, designed for motor run and power factor correction (PFC) applications. This component features a polypropylene metallized dielectric with radial can packaging and quick-connect terminations suitable for chassis-mounted installations with bracket support.

The original 37FD3745-F carries an obsolete product status. Sourcing direct replacements from current inventory requires identifying qualified substitute components that maintain electrical equivalence and mechanical compatibility.

Substiute Parts

37FD3745-F

Cornell Dubilier Electronics (CDE)In Stock: 106337FD3745-F Datasheet

Current PartRFQ

37FD3745A-F

Cornell Dubilier Electronics (CDE)In Stock: 78537FD3745A-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 37FD3745-F is based on the following core equivalence criteria:

• Electrical Equivalence: Capacitance (45 µF), voltage rating (370V AC), and tolerance (±10%) must be identical
• Dielectric Type: Polypropylene metallized film is required for motor run and PFC applications
• Package and Mounting: Radial can configuration with quick-connect terminations and lead spacing of 0.813" (20.64mm) must be maintained
• Temperature Rating: Operating range of -40°C to 70°C must be supported
• Compliance: RoHS3 compliance status ensures regulatory acceptance

The active replacement component 37FD3745A-F satisfies all substitution criteria within established tolerances for physical dimensions and height specifications.

Parameter Comparison

Engineering Selection Recommendations

The 37FD3745A-F direct substitute is the appropriate selection for applications currently utilizing the obsolete 37FD3745-F. This component maintains complete electrical and mechanical equivalence while offering the advantage of active product status with current manufacturing availability.

Both components are RoHS3 compliant and carry identical electrical specifications. The physical dimensions are consistent between the two parts, with the substitute exhibiting a maximum seated height of 4.160" (105.66mm) compared to the original 4.000" (101.60mm). This dimensional variance remains within acceptable mechanical clearance parameters for standard chassis-mounted bracket installations.

The active production status of the 37FD3745A-F ensures continued supply chain stability for applications requiring this capacitor value and rating.

Frequently Asked Questions (FAQ)

Q: Can the 37FD3745A-F be used as a direct replacement for the 37FD3745-F?

A: Yes. Both components are identical in capacitance (45 µF), voltage rating (370V AC), tolerance (±10%), dielectric material (polypropylene metallized), package configuration (radial can), lead spacing (0.813"), and operating temperature range (-40°C to 70°C). The components are electrically and mechanically compatible for motor run and power factor correction applications.

Q: What is the physical dimension difference between these parts?

A: The maximum seated heights differ slightly: the original 37FD3745-F measures 4.000" (101.60mm), while the substitute 37FD3745A-F measures 4.160" (105.66mm). Length and width dimensions are essentially equivalent at approximately 2.906" L × 1.906" W. This height variance is within acceptable limits for standard chassis-mounted bracket configurations.

Q: Are both parts RoHS compliant?

A: Yes. Both the 37FD3745-F and 37FD3745A-F are RoHS3 compliant and carry identical regulatory status. The 37FD3745A-F additionally maintains REACH Unaffected status.

Q: What application categories are these capacitors rated for?

A: Both components are rated for motor run applications and power factor correction (PFC). The polypropylene metallized dielectric is specifically suited for these industrial power applications requiring stable capacitance across the operating temperature range.

Q: Does the obsolete status of the 37FD3745-F affect compatibility?

A: The obsolete status indicates the original part is no longer in active production. The 37FD3745A-F is an active product with current manufacturing availability, making it the appropriate source for new applications or component replacement in existing equipment.