38FD3770-F Film Capacitor 370VAC Equivalent & Substitute Parts

Part Overview

The Cornell Dubilier Electronics (CDE) 38FD3770-F is a 70 µF film capacitor rated at 370V AC with polypropylene (PP) metallized construction in radial, can configuration. This part is designated as obsolete, requiring identification of suitable equivalents for continued application support. Substitute parts must maintain identical electrical performance within the specified voltage, capacitance, tolerance, and dielectric material parameters to ensure direct functionality in motor run and power factor correction applications.

Substiute Parts

38FD3770-F

Cornell Dubilier Electronics (CDE)In Stock: 76338FD3770-F Datasheet

Current PartRFQ

38FD3770A-F

Cornell Dubilier Electronics (CDE)In Stock: 119538FD3770A-F Datasheet

DirectRFQ

38FD3770

Cornell Dubilier Electronics (CDE)In Stock: 96038FD3770 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict matching of the following parameters:

• Electrical Parameters: Capacitance (70 µF), tolerance (±10%), voltage rating AC (370V), and dielectric material (polypropylene, metallized)
• Mechanical Parameters: Package type (radial, can), lead spacing (0.813" / 20.64mm), mounting configuration (chassis mount with holder/bracket requirement)
• Temperature Performance: Operating temperature range (-40°C ~ 70°C)

Parts meeting these criteria are classified as either direct manufacturer equivalents (same part number with minor revision) or parametric equivalents (functionally identical across all critical electrical and mechanical specifications). Compliance status differences do not affect functional interchangeability for this component category.

Parameter Comparison

Engineering Selection Recommendations

38FD3770A-F is the preferred substitute for applications requiring current sourcing. This part carries active product status and maintains ROHS3 compliance, matching the original part's regulatory certification. The direct manufacturer designation indicates this is the current production equivalent.

38FD3770 serves as an alternative parametric equivalent maintaining all critical electrical and mechanical specifications. This part is active and available but does not carry RoHS3 compliance. Selection of this substitute requires confirmation that RoHS compliance is not a requirement for the application.

Both substitutes maintain functional identity with the obsolete 38FD3770-F across all critical performance parameters: 70 µF capacitance, 370V AC rating, ±10% tolerance, polypropylene dielectric, and radial can package with identical mechanical footprint and lead spacing.

Frequently Asked Questions (FAQ)

Q: Can 38FD3770A-F directly replace 38FD3770-F without circuit modification? A: Yes. Both parts meet identical electrical specifications (70 µF, 370V AC, ±10% tolerance, polypropylene metallized dielectric) and mechanical requirements (radial can package, 0.813" lead spacing, quick connect termination, chassis mount with holder/bracket).

Q: What is the difference between the direct equivalent (38FD3770A-F) and parametric equivalent (38FD3770)? A: Both maintain identical electrical performance. The direct equivalent (38FD3770A-F) is the current production revision with ROHS3 compliance. The parametric equivalent (38FD3770) is functionally identical but RoHS non-compliant. Selection depends on regulatory requirements of the application.

Q: Are physical dimensions identical across all three parts? A: All parts share identical lead spacing (0.813" / 20.64mm) and mounting configuration. Minor dimensional variations in length and seated height are provided: 38FD3770-F and 38FD3770 measure 3.654" L x 4.000" H; 38FD3770A-F measures 3.656" L x 4.160" H. These variations are within normal manufacturing tolerance and do not affect holder/bracket compatibility.

Q: Is RoHS compliance required for this application? A: RoHS status must be confirmed against application and regional requirements. The 38FD3770A-F is ROHS3 compliant, while 38FD3770 is non-compliant. Both are functionally equivalent for motor run and PFC applications.

Q: What is the moisture sensitivity level of these parts? A: All three parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.