C921U331KYYDBA7317 Equivalent & Substitute Parts

Part Overview

The C921U331KYYDBA7317 is a 330 pF ceramic capacitor rated for 400VAC with Y5P temperature coefficient, manufactured by KEMET. This component is designed for safety-rated applications requiring X1 and Y2 classifications. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives that maintain compliance with safety ratings and electrical specifications.

Substiute Parts

C921U331KYYDBA7317

KEMETIn Stock: 991C921U331KYYDBA7317 Datasheet

Current PartRFQ

VY2331K29Y5SS6UV0

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 875VY2331K29Y5SS6UV0 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the C921U331KYYDBA7317 is determined by the following critical parameters:

Electrical Equivalence Requirements:

• Capacitance value of 330 pF with ±10% tolerance
• Voltage rating equal to or greater than 400VAC
• Temperature coefficient classification within Y-series (Y5P or Y5S)
• Operating temperature range of -40°C ~ 125°C
• Safety ratings X1 and Y2 compliance

Mechanical Compatibility Requirements:

• Through-hole mounting configuration
• Radial, disc package style
• Lead spacing of 0.394" (10.00mm)
• Formed leads with kinked style

Compliance Requirements:

• ROHS3 compliance
• REACH unaffected status
• EAR99 ECCN classification

The substitute part VY2331K29Y5SS6UV0 meets all electrical and mechanical criteria for direct substitution, with the exception of a slightly higher voltage rating (440VAC versus 400VAC) and a different temperature coefficient classification (Y5S versus Y5P), both of which are acceptable variations within safety-rated ceramic capacitor standards.

Parameter Comparison

Engineering Selection Recommendations

The VY2331K29Y5SS6UV0 manufactured by Vishay Beyschlag/Draloric/BC Components is a direct functional equivalent for the obsolete C921U331KYYDBA7317. Selection of this substitute is supported by the following factors:

Electrical Compatibility: Both components share identical capacitance values (330 pF) and tolerance specifications (±10%). The substitute's 440VAC rating exceeds the original 400VAC requirement, providing additional voltage margin. Both components maintain the same operating temperature range (-40°C ~ 125°C) and hold equivalent safety certifications (X1, Y2).

Mechanical Compatibility: Lead spacing, mounting type, and package configuration are identical between the two components, ensuring direct board-level compatibility without layout modifications.

Compliance Status: The substitute part maintains ROHS3 compliance and REACH unaffected status, matching the regulatory posture of the original component. Both components carry EAR99 ECCN classification.

Product Availability: The substitute part is classified as active, ensuring continued availability and supply chain reliability compared to the obsolete original component.

Frequently Asked Questions (FAQ)

Q: Can the VY2331K29Y5SS6UV0 be used as a direct replacement for the C921U331KYYDBA7317 without circuit modifications?

A: Yes. Both components share identical capacitance values, tolerance specifications, lead spacing, and safety ratings. The substitute's higher voltage rating (440VAC versus 400VAC) and Y5S temperature coefficient (versus Y5P) are compatible with applications designed for the original component.

Q: What is the significance of the different temperature coefficient classifications (Y5P versus Y5S)?

A: Both Y5P and Y5S are Y-series temperature coefficients used in safety-rated ceramic capacitors. The difference reflects manufacturer-specific classification methods for capacitance change over temperature within the -40°C ~ 125°C operating range. Both classifications are acceptable for the specified application.

Q: Are there any physical dimension differences between these components?

A: The substitute part has a smaller body diameter (0.295" versus 0.354") and includes a specified seated height (0.453"). Lead spacing remains identical at 0.394" (10.00mm). These dimensional differences do not affect electrical performance or board-level compatibility.

Q: Does the higher voltage rating of the substitute part affect circuit performance?

A: No. A higher voltage rating provides additional safety margin and does not alter the component's electrical behavior in circuits designed for 400VAC operation. The capacitance value and tolerance remain unchanged.

Q: Are both components compliant with current regulatory requirements?

A: Yes. Both the original and substitute components are ROHS3 compliant and REACH unaffected, meeting current environmental and safety regulations.

Q: What packaging format is available for the substitute part?

A: The VY2331K29Y5SS6UV0 is supplied in Tape & Box (TB) packaging format, suitable for both manual and automated assembly processes.