KEMET C901U331KVYDCAWL20 Equivalent & Substitute Parts

Part Overview

The KEMET C901U331KVYDCAWL20 is a 330 pF ceramic capacitor rated for 400VAC with Y5P temperature coefficient, designed for safety-critical applications. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts to maintain design continuity and ensure component availability for production and field replacement scenarios.

The part operates across a temperature range of -40°C to 125°C and meets ROHS3 compliance and REACH unaffected status requirements. Its radial, disc configuration with through-hole mounting supports standard PCB assembly processes for safety-rated applications.

Key Parameters

Parameter	Value
Capacitance	330 pF
Tolerance	±10%
Voltage Rating	400VAC
Temperature Coefficient	Y5P (B)
Operating Temperature Range	-40°C to 125°C
Safety Ratings	X1, Y1
Mounting Type	Through Hole
Package Type	Radial, Disc
Lead Spacing	0.394" (10.00mm)
Size Diameter	0.276" (7.00mm)
Lead Style	Formed Leads - Kinked
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the C901U331KVYDCAWL20 are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents (KEMET C901U Series): Parts C901U331KUYDBAWL35, C901U331KUYDBAWL40, C901U331KUYDCAWL35, C901U331KUYDCAWL40, C901U331KVYDBAWL35, C901U331KVYDBAWL40, C901U331KVYDCAWL35, and C901U331KVYDCAWL40 maintain identical electrical specifications: 330 pF capacitance, ±10% tolerance, 400VAC rating, Y5P temperature coefficient, and X1/Y1 safety ratings. These parts share the same physical form factor with 0.276" diameter, 10.00mm lead spacing, and kinked formed leads. All are active products with ROHS3 compliance. Variations in part numbers reflect different packaging configurations (bulk versus tape) and internal voltage derating series designations (Y1-250 versus Y1-400).

Similar Alternatives (Vishay VY1 Series): Parts VY1331K31Y5SG63V0 and VY1331K31Y5SQ63V0 provide functional alternatives with the same 330 pF capacitance and ±10% tolerance. These Vishay components differ in voltage rating (760VAC versus 400VAC), temperature coefficient (Y5S versus Y5P), and physical dimensions (0.315" diameter and 0.472" seated height versus 0.276" diameter). These parts are classified as similar rather than direct equivalents due to electrical and dimensional differences.

Substitution eligibility is determined by: capacitance value, tolerance, voltage rating, temperature coefficient, safety ratings, lead spacing, and mounting type.

Parameter Comparison

Parameter	C901U331KVYDCAWL20 (Main)	C901U331KUYDBAWL35	C901U331KUYDBAWL40	C901U331KUYDCAWL35	C901U331KUYDCAWL40	C901U331KVYDBAWL35	C901U331KVYDBAWL40	C901U331KVYDCAWL35	C901U331KVYDCAWL40	VY1331K31Y5SG63V0	VY1331K31Y5SQ63V0
Capacitance	330 pF	330 pF	330 pF	330 pF	330 pF	330 pF	330 pF	330 pF	330 pF	330 pF	330 pF
Tolerance	±10%	±10%	±10%	±10%	±10%	±10%	±10%	±10%	±10%	±10%	±10%
Voltage Rating	400VAC	400VAC	400VAC	400VAC	400VAC	400VAC	400VAC	400VAC	400VAC	760VAC	760VAC
Temperature Coefficient	Y5P (B)	Y5P (B)	Y5P (B)	Y5P (B)	Y5P (B)	Y5P (B)	Y5P (B)	Y5P (B)	Y5P (B)	Y5S	Y5S
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Safety Ratings	X1, Y1	X1, Y1	X1, Y1	X1, Y1	X1, Y1	X1, Y1	X1, Y1	X1, Y1	X1, Y1	X1, Y1	X1, Y1
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package Type	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc	Radial, Disc
Lead Spacing	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)
Size Diameter	0.276" (7.00mm)	0.276" (7.00mm)	0.276" (7.00mm)	0.276" (7.00mm)	0.276" (7.00mm)	0.276" (7.00mm)	0.276" (7.00mm)	0.276" (7.00mm)	0.276" (7.00mm)	0.315" (8.00mm)	0.315" (8.00mm)
Lead Style	Formed Leads - Kinked	Formed Leads - Kinked	Formed Leads - Kinked	Formed Leads - Kinked	Formed Leads - Kinked	Formed Leads - Kinked	Formed Leads - Kinked	Formed Leads - Kinked	Formed Leads - Kinked	Formed Leads - Kinked	Formed Leads - Kinked
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitution (KEMET C901U Series): The eight KEMET C901U parametric equivalents are suitable for direct substitution in applications currently using C901U331KVYDCAWL20. All maintain identical electrical performance specifications (330 pF, ±10%, 400VAC, Y5P, X1/Y1 ratings) and physical form factors (0.276" diameter, 10.00mm lead spacing, kinked formed leads). All substitute parts carry active product status with ROHS3 compliance, ensuring long-term availability and regulatory alignment. Selection among these eight options depends on packaging requirements (bulk versus tape) and internal voltage derating series designation availability.

Alternative Substitution (Vishay VY1 Series): The Vishay VY1331K31Y5SG63V0 and VY1331K31Y5SQ63V0 parts provide functional alternatives where circuit design permits higher voltage rating (760VAC) and different temperature coefficient (Y5S). These components require PCB layout modification due to increased physical diameter (0.315" versus 0.276") and seated height (0.472"). The VY1331K31Y5SQ63V0 offers significantly higher inventory availability (25,969 pieces) compared to other options. These parts are suitable only when design specifications allow for the dimensional and electrical parameter variations.

All substitute options maintain X1/Y1 safety ratings, ROHS3 compliance, and through-hole mounting compatibility with standard PCB assembly processes.

Frequently Asked Questions (FAQ)

Q: Can C901U331KVYDCAWL20 be replaced with any of the eight KEMET C901U equivalents?

A: Yes. All eight KEMET C901U substitute parts (C901U331KUYDBAWL35, C901U331KUYDBAWL40, C901U331KUYDCAWL35, C901U331KUYDCAWL40, C901U331KVYDBAWL35, C901U331KVYDBAWL40, C901U331KVYDCAWL35, C901U331KVYDCAWL40) are direct parametric equivalents with identical capacitance (330 pF), tolerance (±10%), voltage rating (400VAC), temperature coefficient (Y5P), safety ratings (X1, Y1), and physical dimensions. All are active products with ROHS3 compliance.

Q: What is the difference between the eight KEMET C901U substitute parts?

A: The differences are limited to packaging configuration and internal voltage derating series designation. Parts designated with "KUYDB" or "KUYD" contain Y1-250 voltage derating series, while "KVYDB" or "KVYD" parts contain Y1-400 series. The suffix "AWL" or "BAW" indicates packaging type (bulk versus tape). These variations do not affect electrical performance or physical compatibility.

Q: Can Vishay VY1331K31Y5SQ63V0 replace C901U331KVYDCAWL20 directly?

A: No. While VY1331K31Y5SQ63V0 maintains the same 330 pF capacitance, ±10% tolerance, and X1/Y1 safety ratings, it differs in voltage rating (760VAC versus 400VAC), temperature coefficient (Y5S versus Y5P), and physical dimensions (0.315" diameter and 0.472" seated height versus 0.276" diameter). Direct substitution requires PCB layout modification and design review to confirm that higher voltage rating and different temperature coefficient are acceptable for the application.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: capacitance value (330 pF), tolerance (±10%), voltage rating (400VAC for direct equivalents), temperature coefficient (Y5P for direct equivalents), safety ratings (X1, Y1), lead spacing (10.00mm), and physical diameter (7.00mm for direct equivalents). Deviations in any of these parameters require design review and validation.

Q: Why is C901U331KVYDCAWL20 classified as obsolete?

A: The main part number is classified as obsolete, indicating that KEMET has discontinued production. However, eight active parametric equivalents within the C901U series provide direct functional replacement with identical electrical and mechanical specifications, ensuring design continuity without performance compromise.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All eight KEMET C901U equivalents and both Vishay VY1 alternatives are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and use.

Q: What inventory levels are available for each substitute part?

A: KEMET C901U equivalents range from 813 to 1,124 pieces in stock. Vishay VY1331K31Y5SG63V0 has 719 pieces available, while VY1331K31Y5SQ63V0 has significantly higher availability at 25,969 pieces. Inventory levels should be confirmed with the component supplier for current availability.

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