Datasheet
1© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard C1100_CAS_SMD • 11/1/2019
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
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Surface Mount Multilayer Ceramic Chip Capacitors (SMD MLCCs)
Safety Certied, CAS, Surface Mount
X1/Y2 250 VAC, X2 250 VAC (Industrial Grade)
Overview
KEMET’s CAS surface mount safety certied capacitors
are specically designed for interference-suppression
AC line ltering applications. When comparing to radial
leaded disc capacitors, the CAS surface mount form
factor provides engineers the ability to miniaturize
their designs with a higher density solution. Having
internationally recognized safety certications, these
capacitors are well-suited for applications that require
keeping potentially disruptive or damaging line transients
and EMI out of susceptible equipment. They are also an
ideal solution when needing to suppress line disturbances
at the source.
Safety Certied Capacitors are classied as either X and/or
Y capacitors. Class X capacitors are primarily used in line-to
line (across-the-line) applications. Should the capacitor
fail in this application, there is no danger of electric shock
to humans but could result in a risk of re. The Class Y
capacitor is primarily used in line-to-ground (line by-pass)
applications. In this application, failure of the capacitor
could lead to danger of electric shock.
With a working voltage of 250 VAC in line-to-line (Class
X) and 250 VAC in line-to-ground (Class Y) applications,
these safety capacitors meet the impulse test criteria
outlined in IEC Standard 60384. Meeting subclass X1 and
Y2 requirements, these devices are certied to withstand
impulses up to 5 KV (X1/Y2) and 2.5 KV (X2) respectively.
Benets
• Safety Certied to IEC 60384-14
• Class X1/Y2, X2
• 250 VAC rating
• 2.5 kV and 5 kV Impulse Voltages
• Reliable operation up to 125°C
• Available in C0G and X7R Dielectrics
• Case sizes 1808, 1812, 2211, and 2220
• Capacitance offerings ranging from 3.0 pF to 22 nF
• Available capacitance tolerances from ±0.5 pF to ±20%
• RoHS compliant
Applications
Typical applications include:
• Line-to-line (Class X) ltering
• Line-to-ground (Class Y) ltering
• Antenna coupling
• Primary and secondary coupling
(switching power supplies)
• Line disturbances suppression (motors and motor
controls, relays, switching power supplies, and inverters)
X
Y
Y
Metal Enclosure Ground
L
N
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