CD65ZU2GA681MYGKA Equivalent & Substitute Parts

Part Overview

The CD65ZU2GA681MYGKA is a 680 pF ceramic capacitor manufactured by TDK Corporation, rated for 440VAC operation with Z5U temperature coefficient characteristics. This radial, disc-type component is designed for safety-rated applications requiring high voltage performance. The part is currently in active production status with 1065 units available in inventory. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits voltage and temperature coefficient variations within acceptable operating parameters.

Substiute Parts

CD65ZU2GA681MYGKA

TDK CorporationIn Stock: 1166CD65ZU2GA681MYGKA Datasheet

Current PartRFQ

VY1681M29Y5UC63V0

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 30285VY1681M29Y5UC63V0 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD65ZU2GA681MYGKA is determined by the following criteria:

Critical Parameters (Must Match):

• Capacitance value: 680 pF
• Tolerance: ±20%
• Mounting type: Through Hole
• Package type: Radial, Disc
• Lead spacing: 0.394" (10.00mm)
• Safety ratings: X1, Y1 compliance

Allowable Variations:

• Voltage rating: Substitute parts may exceed the 440VAC requirement, provided the higher voltage rating does not compromise circuit design intent
• Temperature coefficient: Y5U (E) is acceptable as an alternative to Z5U, with operating temperature range -40°C ~ 125°C
• Physical dimensions: Minor variations in diameter and height are permissible if the component fits within the PCB layout constraints

The substitute part VY1681M29Y5UC63V0 meets all critical parameters and provides enhanced voltage performance at 760VAC with an extended lower temperature operating limit.

Parameter Comparison

Engineering Selection Recommendations

Both the CD65ZU2GA681MYGKA and VY1681M29Y5UC63V0 are active production components with ROHS3 compliance and identical safety ratings (X1, Y1). The primary distinction is voltage rating and temperature coefficient classification.

Selection between these parts should be based on:

1. Voltage Margin Requirements: The VY1681M29Y5UC63V0 provides 320VAC additional voltage headroom, suitable for applications requiring enhanced overvoltage protection or operating in high-stress electrical environments.

2. Temperature Operating Range: The Vishay substitute extends the lower temperature limit to -40°C, accommodating applications with broader environmental specifications.

3. Physical Fit: The Vishay part exhibits slightly larger dimensions (0.295" diameter vs. 0.276", and 0.453" height vs. 0.433"). PCB layout verification is required to confirm clearance compatibility.

4. Inventory Availability: The VY1681M29Y5UC63V0 maintains significantly higher stock levels (30220 units), supporting supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can VY1681M29Y5UC63V0 be used as a direct replacement for CD65ZU2GA681MYGKA?

A: Yes, provided PCB layout accommodates the slightly larger physical dimensions. The 0.394" lead spacing remains identical, and both components maintain X1, Y1 safety ratings with ROHS3 compliance.

Q: What is the significance of the temperature coefficient difference (Z5U vs. Y5U)?

A: Z5U and Y5U are temperature coefficient classifications defining capacitance variation across operating temperature ranges. Both are suitable for safety-rated applications. The Y5U (E) classification of the Vishay part extends the lower operating temperature to -40°C compared to -25°C for the TDK Z5U part.

Q: Does the higher voltage rating (760VAC vs. 440VAC) affect circuit performance?

A: No. A higher voltage rating does not degrade performance in circuits designed for lower voltages. The substitute part operates safely at or below the original 440VAC specification while providing additional voltage margin.

Q: Are there any compatibility concerns with the physical dimension differences?

A: The lead spacing (0.394") is identical, ensuring footprint compatibility. However, the diameter increase from 7.00mm to 7.50mm and height increase from 11.00mm to 11.50mm require verification against PCB layout constraints and component clearance requirements.

Q: What certifications apply to both parts?

A: Both components are ROHS3 compliant and carry X1, Y1 safety ratings, meeting regulatory requirements for safety-critical applications.