Vishay Cera-Mite 440LD10UG-R Equivalent & Substitute Parts

Part Overview

The Vishay Cera-Mite 440LD10UG-R is a 1000 pF ceramic capacitor rated for 760VAC with Y5U temperature coefficient, designed for safety-critical applications requiring X1, Y1 ratings. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance requirements. The radial, disc-type construction with through-hole mounting provides compatibility with legacy circuit designs while meeting ROHS3 compliance and REACH requirements.

Substiute Parts

440LD10UG-R

Vishay Cera-MiteIn Stock: 921440LD10UG-R Datasheet

Current PartRFQ

440LD10-R

Vishay Cera-MiteIn Stock: 1940440LD10-R Datasheet

Parametric EquivalentRFQ

440LD10AD-R

Vishay Cera-MiteIn Stock: 1079440LD10AD-R Datasheet

Parametric EquivalentRFQ

C911U102MVWDBA7317

KEMETIn Stock: 2388C911U102MVWDBA7317 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 440LD10UG-R is determined by strict equivalence across the following critical parameters: capacitance value (1000 pF), tolerance (±20%), temperature coefficient (Y5U), safety ratings (X1, Y1), mounting type (through hole), and package configuration (radial disc). Voltage rating represents the maximum allowable specification; substitutes must meet or exceed the original 760VAC rating to maintain circuit safety margins. All substitute parts must maintain ROHS3 compliance and REACH compliance status.

The substitute parts are grouped into two categories:

Parametric Equivalents maintain identical electrical specifications and physical form factors, differing only in product status or packaging configuration. These parts are direct replacements with no circuit redesign required.

Manufacturer-Recommended Equivalent provides functional equivalence with a reduced voltage rating (400VAC versus 760VAC), requiring circuit-level evaluation before implementation.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): Select either 440LD10-R or 440LD10AD-R. Both parts are active products from Vishay Cera-Mite with identical electrical specifications to the obsolete 440LD10UG-R. The 440LD10-R offers bulk packaging, while 440LD10AD-R is available in cut tape format. Both maintain the 760VAC rating, straight lead style, and full parameter equivalence. Selection between these two should be based on packaging requirements and inventory availability.

For Cross-Manufacturer Substitution: The KEMET C911U102MVWDBA7317 is a manufacturer-recommended equivalent with the following considerations: voltage rating is reduced to 400VAC (versus 760VAC), operating temperature range extends to -40°C (versus -30°C minimum), and lead style is formed with kinked configuration (versus straight leads). This part maintains capacitance, tolerance, temperature coefficient, and safety ratings. Implementation requires verification that the 400VAC rating is acceptable for the target application circuit.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compliance across production environments.

Frequently Asked Questions (FAQ)

Q: Can 440LD10-R and 440LD10AD-R be used interchangeably with 440LD10UG-R?

A: Yes. Both parts are parametric equivalents with identical electrical and mechanical specifications. The difference is packaging format: 440LD10-R is supplied in bulk, while 440LD10AD-R is supplied in cut tape. Selection depends on assembly process requirements and inventory management practices.

Q: What is the impact of using C911U102MVWDBA7317 instead of the original part?

A: The KEMET part reduces voltage rating from 760VAC to 400VAC. This substitution is only valid if circuit operating voltage does not exceed 400VAC. The part maintains all other critical parameters: 1000 pF capacitance, ±20% tolerance, Y5U temperature coefficient, X1/Y1 safety ratings, and through-hole radial disc package. Lead style differs (formed/kinked versus straight), which may require PCB layout verification for lead spacing compatibility.

Q: Are there physical dimension differences between substitute parts?

A: The Vishay parts (440LD10-R and 440LD10AD-R) maintain identical dimensions: 0.366" diameter, 0.492" maximum seated height, and 0.374" lead spacing. The KEMET C911U102MVWDBA7317 has a smaller diameter (0.315") and different lead spacing (0.394"), requiring PCB footprint verification before implementation.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All listed substitutes are ROHS3 compliant and REACH unaffected, matching the original part's regulatory status. This ensures compatibility with production environments requiring these certifications.

Q: Which substitute should be selected for new production designs?

A: For new designs, 440LD10-R or 440LD10AD-R are preferred as they are active Vishay products with full parameter equivalence and no voltage derating. Selection between these two depends on packaging format compatibility with assembly equipment. The KEMET part should only be selected if 400VAC rating is confirmed acceptable for the application.