C901U331KUYDBAWL40 Equivalent & Substitute Parts

Part Overview

The C901U331KUYDBAWL40 is a 330 pF ceramic capacitor rated for 400VAC with Y5P temperature coefficient, manufactured by KEMET. This radial, disc-type capacitor is designed for safety applications requiring X1 and Y1 ratings. The part is currently active in production with 813 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications where the primary part number may be unavailable or where alternative electrical specifications are acceptable within system design parameters.

Substiute Parts

C901U331KUYDBAWL40

KEMETIn Stock: 863C901U331KUYDBAWL40 Datasheet

Current PartRFQ

VY1331K31Y5SQ63V0

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 26036VY1331K31Y5SQ63V0 Datasheet

SimilarRFQ

C901U331KVYDBAWL45

KEMETIn Stock: 1091C901U331KVYDBAWL45 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the C901U331KUYDBAWL40 is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Capacitance value: 330 pF (exact match required)
• Tolerance: ±10% (exact match required)
• Temperature Coefficient: Y5P or Y5S (acceptable variants within Y-series safety-grade specifications)
• Voltage Rating: 400VAC minimum (equal or higher ratings are acceptable)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial, Disc (exact match required)
• Lead Spacing: 0.394" (10.00mm) (exact match required)
• Safety Ratings: X1, Y1 (exact match required)
• Operating Temperature: -40°C ~ 125°C (exact match required)
• Compliance: ROHS3 Compliant, REACH Unaffected (exact match required)

Substitute parts must maintain identical mechanical compatibility and electrical safety certifications. Dimensional variations in body diameter are acceptable provided lead spacing and mounting type remain unchanged. Voltage ratings equal to or exceeding 400VAC are acceptable substitutes. Temperature coefficient variants within the Y-series safety-grade classification are acceptable.

Parameter Comparison

Engineering Selection Recommendations

C901U331KVYDBAWL45 (KEMET Parametric Equivalent): This part is a direct parametric equivalent manufactured by KEMET within the same C900AH SFTY series. It maintains identical electrical specifications (330 pF, ±10%, 400VAC, Y5P temperature coefficient) and mechanical compatibility (0.276" diameter, 10.00mm lead spacing, through-hole radial configuration). The primary distinction is series designation (Y1-400 versus Y1-250). Both parts are ROHS3 compliant, REACH unaffected, and rated for safety applications with X1 and Y1 certifications. This substitute is recommended for direct replacement where KEMET sourcing is preferred or where supply of the primary part number is constrained.

VY1331K31Y5SQ63V0 (Vishay Beyschlag/Draloric/BC Components Cross-Reference): This part provides equivalent capacitance (330 pF, ±10%) and temperature coefficient classification (Y5S, within Y-series safety-grade specifications) with an elevated voltage rating of 760VAC, exceeding the 400VAC requirement of the main part. The body diameter is 0.315" (8.00mm), representing a 0.039" increase from the main part's 7.00mm diameter. Lead spacing (10.00mm) and mounting type (through-hole radial) remain identical. This substitute is suitable for applications where higher voltage margin is acceptable and where PCB layout accommodates the slightly larger body diameter. All compliance certifications (ROHS3, REACH unaffected) and safety ratings (X1, Y1) are maintained.

Both substitute parts are active products with confirmed inventory availability and full regulatory compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can C901U331KVYDBAWL45 be used as a direct replacement for C901U331KUYDBAWL40?

A: Yes. Both parts are manufactured by KEMET, share identical electrical specifications (330 pF, ±10%, 400VAC, Y5P temperature coefficient), and maintain the same mechanical configuration (0.276" diameter, 10.00mm lead spacing, through-hole radial). The parts differ only in series designation within the C900AH SFTY safety-grade line. Direct substitution is supported without circuit modification.

Q: What is the primary difference between C901U331KUYDBAWL40 and VY1331K31Y5SQ63V0?

A: The primary differences are manufacturer (KEMET versus Vishay Beyschlag/Draloric/BC Components), voltage rating (400VAC versus 760VAC), temperature coefficient classification (Y5P versus Y5S), and body diameter (7.00mm versus 8.00mm). Capacitance, tolerance, lead spacing, mounting type, and safety ratings are identical. The Vishay part provides higher voltage margin and represents a cross-manufacturer substitute.

Q: Is the larger body diameter of VY1331K31Y5SQ63V0 (8.00mm versus 7.00mm) a compatibility concern?

A: The 0.039" diameter increase must be evaluated against available PCB layout space. Lead spacing (10.00mm) remains unchanged, ensuring footprint compatibility for lead hole positioning. Physical clearance around the component body must be verified during design review. If space constraints exist, the KEMET C901U331KVYDBAWL45 maintains the original 7.00mm diameter.

Q: Are all substitute parts compliant with the same regulatory standards as the main part?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of C901U331KUYDBAWL40. All parts carry X1 and Y1 safety ratings for use in safety-critical applications. Compliance documentation is available for each part number.

Q: Can VY1331K31Y5SQ63V0 be used in a 400VAC circuit designed for C901U331KUYDBAWL40?

A: Yes. The 760VAC rating of VY1331K31Y5SQ63V0 exceeds the 400VAC circuit requirement, providing additional voltage margin. The part is electrically and mechanically compatible. PCB layout must accommodate the 8.00mm body diameter. No circuit modification is required.

Q: What is the difference between Y5P and Y5S temperature coefficients?

A: Both Y5P and Y5S are Y-series safety-grade temperature coefficients with identical operating temperature range (-40°C ~ 125°C). Y5P and Y5S represent different capacitance change specifications within the Y-series classification. Both are acceptable for safety applications. Specific application requirements should determine which classification is appropriate.

Q: Are there inventory considerations when selecting between substitute parts?

A: Yes. Current inventory levels are: C901U331KUYDBAWL40 (813 pcs), C901U331KVYDBAWL45 (1006 pcs), and VY1331K31Y5SQ63V0 (25969 pcs). VY1331K31Y5SQ63V0 offers significantly higher stock availability. Procurement lead times and supply chain continuity should be evaluated based on application requirements and production schedules.

Q: Do all substitute parts use the same lead style?

A: Yes. All parts listed use formed leads with kinked configuration, maintaining identical lead geometry and insertion characteristics for through-hole assembly.