DSS6NF31C223Q55B Murata, DSS6NF31C223Q55B Datasheet - Page 12

• Manufacturer Part Number: DSS6NF31C223Q55B
• Description: EMI/RFI Suppressors & Ferrites 22KPF 16V DISC EMI F
• Manufacturer: Murata

Specifications of DSS6NF31C223Q55B

• Shielding: Unshielded
• Product: EMI Filters
• Tolerance: 80 %
• Maximum Dc Current: 6 Amps
• Maximum Dc Resistance: 22000 Ohms
• Operating Temperature Range: - 25 C to + 85 C
• Termination Style: Radial
• Current Rating: 6A
• Voltage Rating: 16V
• Capacitance: 22000pF
• Svhc: No SVHC (15-Dec-2010)
• Capacitance Tolerance +: 80%
• Capacitance Tolerance -: 20%
• External Depth: 2.54mm
• External Length / Height: 8mm
• Rohs Compliant: Yes
• External Width: 8mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

EMI LEADED FILTERS
EMI SUPPRESSION FILTERS
VARISTOR-CAPACITORS
3 -TERMINAL STRUCTURE
The reason the 3-terminal structure provides excellent
high frequency characteristics.
Bypass capacitors should logically be able to remove
more noise as frequency increases. In actual fact, the
electrodes and lead wires of the capacitor have series
inductance as shown in Fig. 3, and this causes an LC
resonance when the frequency is between 1MHz and
50MHz. As a result, when the frequency is higher than
the self-resonance frequency, the noise suppression
capability of the bypass capacitor is drastically reduced
because the capacitor functions as inductor. To solve
this problem, the DSS series has one side of the capacitor
electrodes connected to two lead wires. This eliminates
the series inductance to the capacitor. Furthermore,
a ferrite bead is attached to each lead wire to form a
T-shaped filter, thus providing efficient noise suppression.
APPLICATIONS
258
Engine Controllers
Automobile
Audio Equipment
Computers
DC Motors
Conventional 2-Lead Capacitor
Varistor:
Bypasses high-voltage
surges to ground in order
to protect circuits.
Systems
Appearance
12-22
223S
M
Fig. 3 Equivalent circuit
Ferrite bead:
Absorbs high-frequency noise.
Lines to be connected to
Power lines, I/O for
low-frequency current
Power lines, audio
output lines
Power lines, I/O lines for
low-frequency current
Power lines
3-Lead Capacitor (DSS Series)
Capacitor:
Bypasses high-frequency noise.
Symbol
Protection of systems from excessive voltage. Prevents ignition noise,
lightning surges, etc. from causing malfunctions.
Protection of system from excessive voltage. Prevents ignition noise from
influencing audio current.
Protection of systems from excessive voltage. Prevents radiation and
conduction noise.
Prevention of brush noise.
NOISE ABSORPTION EFFECT OF
VARISTOR-CAPACITOR
The Varistor-Capacitor is capable of removing even
1200V surges and will withstand 2000V impulses.
is used to suppress
Varistor-Capacitor
shown below
the surge
Effects
Waveform when a
Varistor-Capacitor is
not used (surge from
a noise simulator).
Waveform after the
noise passes through
a Varistor-Capacitor.
Protection of circuitry
is achieved.
DSS710 Series
SCALE:
200V/Div.
10NS/Div.
12-22
223S
M
CG01-I