SFC37S30K291B Equivalent & Substitute Parts

Part Overview

The SFC37S30K291B is a 30 µF film capacitor rated for 370V AC operation, manufactured by Cornell Dubilier Electronics (CDE). This polypropylene metallized radial capacitor is designed for motor run applications and features a radial can package with quick connect/disconnect termination. The part is currently active in production with 724 units in stock.

Identifying equivalent and substitute parts is necessary when the primary part number becomes unavailable, when packaging requirements change, or when compliance certifications must be updated for specific applications.

Substiute Parts

SFC37S30K291B

Cornell Dubilier Electronics (CDE)In Stock: 734SFC37S30K291B Datasheet

Current PartRFQ

SFC37T30K291B-F

Cornell Dubilier Electronics (CDE)In Stock: 1612SFC37T30K291B-F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SFC37S30K291B is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Capacitance value: 30 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage rating: 370V AC (exact match required)
• Dielectric material: Polypropylene (PP), Metallized (exact match required)

Mechanical Parameters:

• Package type: Radial, Can (exact match required)
• Mounting configuration: Chassis Mount, Requires Holder/Bracket (exact match required)
• Termination: Quick Connect, Disconnect (exact match required)
• Lead spacing: 0.810" (20.57mm) (exact match required)
• Physical dimensions: 2.910" L x 1.910" W (exact match required)
• Height: 3.030" maximum (exact match required)

Environmental Parameters:

• Operating temperature range: -40°C to 70°C (exact match required)

Substitute parts must match all parameters listed above. Variations in packaging format (such as bulk versus tape/reel) do not affect electrical or mechanical compatibility and are therefore permitted.

Parameter Comparison

Engineering Selection Recommendations

SFC37T30K291B-F as Substitute for SFC37S30K291B:

The SFC37T30K291B-F is a direct parametric equivalent to the SFC37S30K291B. All electrical, mechanical, and environmental specifications are identical. Both parts are manufactured by Cornell Dubilier Electronics within the SF series and maintain the same 30 µF capacitance, 370V AC rating, polypropylene metallized dielectric, radial can package, and motor run application profile.

The primary difference between these parts is compliance certification. The SFC37T30K291B-F carries ROHS3 compliance, while the SFC37S30K291B is RoHS non-compliant. Selection between these parts should be based on the regulatory requirements of the end application. Applications requiring RoHS3 compliance must use SFC37T30K291B-F. Applications with no RoHS compliance requirement may use either part.

Both parts are active in production. The SFC37T30K291B-F has higher inventory availability (1504 units versus 724 units), which may influence lead time considerations.

Frequently Asked Questions (FAQ)

Q: Can SFC37T30K291B-F replace SFC37S30K291B in my motor run application?

A: Yes. The SFC37T30K291B-F is electrically and mechanically equivalent to the SFC37S30K291B. Both parts have identical capacitance (30 µF), voltage rating (370V AC), dielectric material (polypropylene metallized), package configuration (radial can), and operating temperature range (-40°C to 70°C). Direct substitution is possible without circuit modification.

Q: What is the difference between these two part numbers?

A: The primary difference is RoHS compliance status. The SFC37T30K291B-F is ROHS3 compliant, while the SFC37S30K291B is RoHS non-compliant. The packaging format also differs: SFC37S30K291B uses standard packaging, while SFC37T30K291B-F is supplied in bulk format. All electrical and mechanical specifications are identical.

Q: Does the bulk packaging of SFC37T30K291B-F affect compatibility?

A: No. Packaging format (standard versus bulk) does not affect the electrical or mechanical performance of the capacitor. The component itself is identical. Bulk packaging may affect handling, storage, and ordering procedures but does not impact circuit compatibility or performance.

Q: Which part should I select for a new design?

A: Selection depends on regulatory requirements. If your application or end market requires RoHS3 compliance, use SFC37T30K291B-F. If RoHS compliance is not required, either part is acceptable. Both parts are active in production and available in stock.

Q: Are there any thermal or electrical performance differences between these parts?

A: No. Both parts operate across the same temperature range (-40°C to 70°C) and have identical electrical ratings. Performance in motor run applications is equivalent.

Q: Can I mix these parts in the same production batch?

A: Yes, from a functional standpoint. However, if RoHS compliance documentation is required for your application, mixing compliant and non-compliant parts may create traceability and certification issues. Verify your quality and compliance requirements before mixing part numbers.