Equivalent & Substitute Parts for 440LD33LQ-R

Part Overview

The Vishay Cera-Mite 440LD33LQ-R is a 3300 pF ceramic capacitor rated for 760VAC with Y5U temperature coefficient, designed for safety-critical applications. This part is classified as obsolete, necessitating identification of equivalent and substitute components to maintain design continuity and ensure supply chain availability. The part features radial, disc construction with through-hole mounting suitable for high-voltage AC applications.

Substiute Parts

440LD33LQ-R

Vishay Cera-MiteIn Stock: 1107440LD33LQ-R Datasheet

Current PartRFQ

440LD33-R

Vishay Cera-MiteIn Stock: 1247440LD33-R Datasheet

Parametric EquivalentRFQ

C951U332MVWDBA7317

KEMETIn Stock: 8067C951U332MVWDBA7317 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 440LD33LQ-R is determined by the following critical parameters:

• Capacitance value: 3300 pF (exact match required)
• Tolerance: ±20% (exact match required)
• Temperature Coefficient: Y5U (E) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial, Disc (exact match required)
• Ratings: X1, Y1 (exact match required for safety applications)
• RoHS Compliance: ROHS3 Compliant (required for regulatory compliance)

Voltage rating may vary within the constraints of the application circuit design. The identified substitutes maintain all critical electrical and mechanical parameters while differing in packaging format and voltage rating specifications.

Parameter Comparison

Engineering Selection Recommendations

The 440LD33-R represents a direct parametric equivalent to the obsolete 440LD33LQ-R, differing only in packaging format (bulk versus tape). Both components are manufactured by Vishay Cera-Mite and maintain identical electrical specifications. The 440LD33-R is currently in active production status with confirmed inventory availability.

The C951U332MVWDBA7317 manufactured by KEMET provides an alternative substitute with identical capacitance, tolerance, and temperature coefficient specifications. This component operates at a reduced voltage rating of 400VAC compared to the 760VAC rating of the primary part. The KEMET component is suitable for applications where the circuit voltage requirement does not exceed 400VAC. Both substitute options maintain ROHS3 compliance and X1, Y1 safety ratings required for the intended application.

Frequently Asked Questions (FAQ)

Q: Can the 440LD33-R directly replace the 440LD33LQ-R?

A: Yes. The 440LD33-R is a parametric equivalent with identical electrical and mechanical specifications. The difference is packaging format: the main part uses tape packaging while the equivalent uses bulk packaging. Both are manufactured by Vishay Cera-Mite and maintain the same 760VAC rating, 3300 pF capacitance, and Y5U temperature coefficient.

Q: Is the KEMET C951U332MVWDBA7317 suitable for all applications using the 440LD33LQ-R?

A: The KEMET substitute is suitable only for applications where the circuit voltage requirement does not exceed 400VAC. The reduced voltage rating (400VAC versus 760VAC) must be verified against circuit design specifications before implementation. All other electrical parameters remain equivalent.

Q: What are the key parameters that must match for substitution?

A: Substitution requires exact matching of capacitance (3300 pF), tolerance (±20%), temperature coefficient (Y5U), mounting type (through hole), package style (radial disc), and safety ratings (X1, Y1). Voltage rating may be reduced if circuit design permits.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. Both the 440LD33-R and C951U332MVWDBA7317 are ROHS3 compliant, meeting regulatory requirements for hazardous substance restrictions.

Q: What is the difference between the main part and the equivalent in terms of availability?

A: The 440LD33LQ-R is obsolete with limited remaining inventory. The 440LD33-R is in active production status with confirmed availability of 1205 pieces. The KEMET C951U332MVWDBA7317 is also active with 8033 pieces in stock.