Vishay Cera-Mite 440LD10AD-R Equivalent & Substitute Parts

Part Overview

The Vishay Cera-Mite 440LD10AD-R is a 1000 pF ceramic capacitor rated for 760VAC with Y5U temperature coefficient, designed for safety-critical applications. This through-hole radial disc capacitor is ROHS3 compliant and carries X1, Y1 safety ratings. The part is currently active in production with 1042 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

440LD10AD-R

Vishay Cera-MiteIn Stock: 1079440LD10AD-R Datasheet

Current PartRFQ

440LD10-R

Vishay Cera-MiteIn Stock: 1940440LD10-R Datasheet

Parametric EquivalentRFQ

C911U102MVWDBA7317

KEMETIn Stock: 2388C911U102MVWDBA7317 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 440LD10AD-R is determined by the following critical parameters:

Primary Matching Criteria:

• Capacitance value: 1000 pF
• Tolerance: ±20%
• Temperature coefficient: Y5U (E)
• Safety ratings: X1, Y1
• Mounting type: Through Hole
• Package type: Radial, Disc
• RoHS compliance: ROHS3 Compliant

Voltage Rating Consideration: The main part operates at 760VAC. Substitute parts must maintain voltage ratings sufficient for the application. A lower voltage rating indicates reduced electrical stress margin and may not be suitable for all circuit configurations.

Identified Substitutes:

1. 440LD10-R (Vishay Cera-Mite) — Parametric equivalent with identical electrical specifications and voltage rating (760VAC). Differs only in packaging format (Bulk vs. standard designation).

2. C911U102MVWDBA7317 (KEMET) — Manufacturer-recommended substitute with matching capacitance, tolerance, and temperature coefficient. Voltage rating is 400VAC (lower than main part). Physical dimensions differ: 0.315" diameter vs. 0.366" diameter; lead spacing 0.394" vs. 0.374".

Parameter Comparison

Engineering Selection Recommendations

440LD10-R (Vishay Cera-Mite) is the primary equivalent substitute. It maintains identical electrical specifications, voltage rating, and physical dimensions. Both parts are ROHS3 compliant and carry active product status. Selection between 440LD10AD-R and 440LD10-R depends on packaging requirements and inventory availability.

C911U102MVWDBA7317 (KEMET) is a manufacturer-recommended alternative with the following considerations:

• Electrical specifications (capacitance, tolerance, temperature coefficient, safety ratings) are identical
• Voltage rating is 400VAC, which is 360VAC lower than the main part
• Physical dimensions differ: smaller diameter (0.315" vs. 0.366") and different lead spacing (0.394" vs. 0.374")
• Operating temperature range extends to -40°C (vs. -30°C minimum)
• ROHS3 compliant with active product status

Selection of the KEMET part requires confirmation that the 400VAC rating is adequate for the intended circuit application and that PCB layout accommodates the different lead spacing.

Frequently Asked Questions (FAQ)

Q: Can 440LD10-R directly replace 440LD10AD-R?

A: Yes. Both parts are Vishay Cera-Mite products with identical electrical and physical specifications. The difference is in packaging designation. Both are ROHS3 compliant and active products.

Q: Is C911U102MVWDBA7317 a direct replacement?

A: It is electrically compatible for capacitance, tolerance, and temperature coefficient. However, the voltage rating is 400VAC versus 760VAC. Physical dimensions differ: diameter is 0.315" instead of 0.366", and lead spacing is 0.394" instead of 0.374". PCB layout verification is required before substitution.

Q: What does the voltage rating difference mean?

A: The main part is rated for 760VAC operation. The KEMET substitute is rated for 400VAC. If the circuit operates at voltages exceeding 400VAC, the KEMET part is not suitable. If circuit voltage is below 400VAC, the KEMET part operates within its rated specification.

Q: Are all three parts RoHS compliant?

A: Yes. All three parts carry ROHS3 compliance status.

Q: Do the physical dimension differences affect PCB compatibility?

A: Yes. The KEMET part has a smaller diameter (0.315" vs. 0.366") and different lead spacing (0.394" vs. 0.374"). PCB footprints designed for the Vishay parts may require modification to accommodate the KEMET part. Lead spacing differences may affect through-hole alignment.

Q: What is the temperature coefficient Y5U (E)?

A: Y5U is a ceramic capacitor temperature coefficient classification indicating capacitance change over the operating temperature range of -30°C to +125°C (or -40°C to +125°C for the KEMET part). The (E) designation indicates the specific tolerance band for this classification.