Types MCH and MCHN
Multilayer High RF Power Capacitors
2500 & 4000 Volt RF Capacitors for Medical Imaging Coils, Plasma Generators,
VHF/UHF Power Amplifiers and Antenna Tuning with Nonmagnetic Option
The flexible aluminum silicate dielectric eliminates
cracking and permits soldering to 260 °C. These high
voltage, RF capacitors need no voltage derating at
temperatures up to 125 ºC and voltages to 4000 Vdc.
Exceptionally low ESR and superior thermal qualities
set the MCH/MCHN chip capacitors apart from
ordinary RF capacitors.
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Highlights
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Specifications
No thermal cracking
FR4 compatible and wave solderable
Extremely high Q above 50 MHz
300
250
Nonmagnetic option available
Ultra stable: no change with (t), (V) and
200
(f)
150
Excellent for tuning and impedance matching
100
High flashover level
50
Withstands 2 mm bend test
25
0
Better than porcelain
Temp (ºC)
Applications
Reflow Solder Profile
• MRI Coils
Pre-heat
Wave Solder Profile
Soldering
Pre-heat
220 ~255 ºC
30
• RF Ablation Systems
Soldering
Cooling
Peak 230~260 ºC
300
Transmitters
220 ~260 ºC
•
250
• RF Generators
10 sec. max.
• Antenna Tuning
200
150
• Lasers
100
• RF Power Amplifiers
• MRI Generators
50
Temp (ºC)
50
150
180
200
25
0
Peak 230 ~255 º
5 sec. max
Time (sec)
Capacitance and Voltage Ratings:
RoHS Compliant
Time (sec)
10
20
70
8
10 – 220 pF at 4kVdc and 270 – 1000 pF at
Solder
2500 Vdc (other ratings available)
Capacitance Tolerance:
±5% standard (±2% available)
Hand Soldering Method
Capacitor
Temperature Range:
–55 ºC to +125 ºC (with no voltage derating)
• SnAgCu recommended solder
3838 (9.7 x 9.7 mm)
•
Case Size:
Do not use strong acid type flux with RM or RMA
Solder
• Soldering iron tip temperature should be
Temperature Characteristics:
ºC ≤
Temp. Coefficient
Cap Drift
250 ºC to 280
5 sec.
•
60 Watt iron or less
0
Ti
to +50 ppm/ºC
±(0.05%+0.1 pF)
Good
Bad
Engineering Design Kits
MCH2500VKIT8, MCH4000VKIT10
Nonmagnetic MCHN2500VKIT9, MCHN4000VKIT11
High Q, Low ESR Multilayer
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Construction for RF Power Applications
Resin Coating
Glass
Terminal
Mica
2500 V kits 5 each of 8 values 270 to 1000 pF
4000 V kits 5 each of 10 values 10 – 220 pF
Sn Plating
Conductive Resin
Ni Electrode: Type MC
Cu Electrode: Nonmagnetic Type MCN
Ag Electrode
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CDE Cornell Dubilier • 1605 E. Rodney French Blvd. • New Bedford, MA 02744 • Phone: (508)996-8561 • Fax: (508)996-3830 • www.cde.com
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Types MCH and MCHN
Multilayer High RF Power Capacitors
Typical Performance Data
ESR vs. Frequency for 470 pF
1
Porcelain (3838)
MCH (3838)
0.1
ESR (
½
)
0.01
0.001
1
10
100
f (MHz)
1000
10000
MCH (3838) 2.5 kVdc
Porcelain (3838) 2.5 kVdc
Current Rating (IRMS) for 470 pF at 60 ºC Rise
100
RMS Current
(Amps)
MCH (3838)
10
Porcelain (3838)
1
1
10
100
f (MHz)
1000
10000
Porcelain (3838) 2.5 kV 11.4 A @ 64 MHz
MCH38K471J (3838) 2.5 kV 14.2 A @ 64 MHz
CDE Cornell Dubilier • 1605 E. Rodney French Blvd. • New Bedford, MA 02744 • Phone: (508)996-8561 • Fax: (508)996-3830 • www.cde.com
3
Types MCH and MCHN
Multilayer High RF Power Capacitors
Typical Performance Data
Q vs. Frequency 470 pF @ 25 ºC
100000
10000
1000
Q
100
Q
Porcelain (3838)
MCH (3838)
10
1
1
10
100
1000
10000
f (MHz)
Porcelain (3838) 2.5 kV 11.4 A @ 64 MHz
MCH38K471J (3838) 2.5 kV 14.2 A @ 64 MHz
Impedance vs. Frequency for 470 pF @ 25 ºC
Impedance |Z| vs. Frequency for 470 pF @ 25 ºC
1000
100
|Z| (
½
)
Z (Ω)
Porcelain (3838)
10
MCH (3838)
1
0.1
1
10
100
1000
10000
f (MHz)
Porcelain (3838) 2.5 kV 11.4 A @ 64 MHz
MCH38K471J (3838) 2.5 kV 14.2 A @ 64 MHz
CDE Cornell Dubilier • 1605 E. Rodney French Blvd. • New Bedford, MA 02744 • Phone: (508)996-8561 • Fax: (508)996-3830 • www.cde.com
4
Types MCH and MCHN
Multilayer High RF Power Capacitors
Typical Performance Data
Environmental Specifications
Humidity (No Load):
+40 ºC ±2 ºC @ 90%
Electrical Specifications
Dielectric Strength:
2500 Vdc:
to 95% RH, 500 hrs.
1.5 x Rated Voltage
Measure after 24 hrs, cap
for 5 seconds
is ±3% of initial, DF ≤150%
4000 Vdc:
4
of original, IR 3x10 MΩ,
1.2 x Rated Voltage
no visual damage
for 5 seconds
Storage Method:
Store at 0 to +40 ºC at
Dissipation Factor (DF):
≤0.1% @ 1 MHz and
≤5 Vrms
≤60% RH, use within
Insulation Resistance:
100K MΩ minimum
6 months of receipt, if
@ 500 Vdc ±10%
6 months is exceeded,
check solderability
CDE Cornell Dubilier • 1605 E. Rodney French Blvd. • New Bedford, MA 02744 • Phone: (508)996-8561 • Fax: (508)996-3830 • www.cde.com
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