www.johansondielectrics.com
H
IGH
V
OLTAGE
P
OLY
T
ERM
®
C
ERAMIC
C
APACITORS
- X7R D
IELECTRIC
Standard MLCCs are prone to cracking due to mishandling,
depanelization, and board flexing. In response to customer
requests for higher resistance to mechanical stress, and as
a result of continuous efforts to improve our products, JDI
has introduced PolyTerm
®
termination ceramic capacitors
to meet those customer requirements for increased
resistance to flexure cracking.
PolyTerm
®
is a conductive epoxy termination material
loaded with silver, allowing it to absorb much more bending
force than standard termination material. After termination
PolyTerm
®
parts are nickel and tin plated using the same
process as standard parts. There is no effect on solderability
or capability to withstand the soldering process.
PolyTerm
®
capacitors are ideal for use in telecom, power
supply, inverter, and modem applications.
100% Sn
External Termination
Ceramic Body
100% Sn
External
Termination
Ni Barrier
PolyTerm
®
Pd/Ag Internal
Electrodes
F
EATURES
• Lead Free Terminations 100% Sn, Final Termination
• Electrodes: Pd/Ag
• Core Termination: PolyTerm
®
• Middle Barrier Layer: Ni
• External Termination Layer: 100% Sn
• X7R temperature coefficient
• Highly reliable performance
• Industry standard case sizes
H
OW TO
O
RDER
302
VOLTAGE
1st two digits are
significant; third
digit denotes
number of zeros to
follow
eg:
302 = 3000 VDCW
R29
CASE SIZE
R15 = 0805
R18 = 1206
S41 = 1210
S43 = 1812
S47 = 2220
S48 = 2225
S49 = 1825
N
DIELECTRIC
W = X7R
1R0
CAPACITANCE
1st two digits are
significant; third
digit denotes
number of zeros to
follow
eg: 101 = 100 pF
R denotes decimal
eg: 1R0 = 1.0 pF
C
TOLERANCE
J = ± 5%
K = ± 10%
M = ± 20%
F
TERMINATION
F = PolyTerm
®
4
MARKING
4 = Unmarked
E
TAPE CODE
E = 7” Plastic
T = Paper 7” reel
Safety Certified capacitor p/ns end with
“-****-SC” and are rated at 250 Volts AC.
Example Part Number: 302R29N1R0CF4E
1
15191 Bledsoe Street, Sylmar, California 91342 • (818) 364-9800• FAX (818) 364-6100
www.johansondielectrics.com
H
IGH
V
OLTAGE
P
OLY
T
ERM
®
A
VAILABILITY
SIZE
Voltage
0805
1000V
500V
630V
500V
1206
1000V
2000V
3000V
630V
500V
1210
1000V
2000V
3000V
1000V
630V
500V
630V
1808
2000V
3000V
4000V
5000V
1000V
X2Y3
X1Y2
500V
630V
1812
2000V
3000V
4000V
5000V
X2Y3
2211
X1Y2
•
100 pF
150 pF
180 pF
220 pF
270 pF
330 pF
470 pF
560 pF
680 pF
820 pF
1.0 nF
1.2 nF
1.5 nF
1.8 nF
2.2 nF
2.7 nF
3.3 nF
3.9 nF
4.7 nF
5.6 nF
6.8 nF
8.2 nF
10 nF
12 nF
15 nF
18 nF
22 nF
27 nF
33 nF
39 nF
47 nF
56 nF
68 nF
82 nF
100 nF
120 nF
150 nF
180 nF
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Note: Part values marked with “•” have better availability and shorter lead times.
15191 Bledsoe Street, Sylmar, California 91342 • (818) 364-9800• FAX (818) 364-6100
2
www.johansondielectrics.com
H
IGH
V
OLTAGE
P
OLY
T
ERM
®
A
VAILABILITY
SIZE
Voltage
500V
630V
1825
1000V
2000V
3000V
4000V
5000V
1000V
500V
630V
2220
2000V
3000V
4000V
5000V
X1Y2
500V
630V
2225
1000V
2000V
3000V
4000V
5000V
270 pF
330 pF
470 pF
560 pF
680 pF
820 pF
1.0 nF
1.2 nF
1.5 nF
1.8 nF
2.2 nF
2.7 nF
3.3 nF
3.9 nF
4.7 nF
5.6 nF
6.8 nF
8.2 nF
10 nF
12 nF
15 nF
18 nF
22 nF
27 nF
33 nF
39 nF
47 nF
56 nF
68 nF
82 nF
100 nF
120 nF
150 nF
180 nF
220 nF
270 nF
330 nF
390 nF
470 nF
560 nF
680 nF
•
•
•
Note: Part values marked with ‘
•
’ have better availability and shorter lead times.
3
15191 Bledsoe Street, Sylmar, California 91342 • (818) 364-9800• FAX (818) 364-6100
www.johansondielectrics.com
B
END
T
EST
D
ESCRIPTION
The test board is designed so that the capacitance of the part can be measured while the part is being flexed
(See figure 1). The capacitor is mounted at the center of the board. The testing equipment has a pressing block
that is located so that it applies force at the center of the test board from below the part at a constant rate. Since
the edges of the board are held in place by the support pins, this causes the board to flex. The amount of flex is
measured in millimeters from the center of the board to the edge, please see “A” in Figure 2.
½½
½
½
½½½½
½½½½
½½½
½½½½½½½½½½½½½½
½
½½½½½½
½½½½½½½½½½½½
½½
½½½½
½½½½
Figure 1
½½½½½½½½½
Figure 2
As the test board is flexed, the capacitance is constantly being measured by a capacitance meter which is con-
nected to the test boards through capacitance probes. The capacitance is first measured at 0mm flex to establish
the nominal value. The test board is then flexed to 1mm and held for at least on second, then the capacitance
is measured, it is then flexed to 2mm, and so on up to 5mm. Any change in capacitance that exceeds 5% of the
nominal value is considered a failure.
½½½½½½½½½½½½½½½½½½½½½½½½½½½
½½½½
½½½
½½½
½½½
½½½
½½½
½½½
½½½
½½½
½½½
½½
½½½½½½½½½½½½½½½½½½½½
½½½½½½½½
½½½½½½½½½½½½½½½½
½½½½
½½½½
½½½½
½½½½
½½½½
½½½½½½
½½½½½½½½½½½½½½½
15191 Bledsoe Street, Sylmar, California 91342 • (818) 364-9800• FAX (818) 364-6100
4
www.johansondielectrics.com
E
XAMPLE OF
C
USTOMER
A
PPLICATION
Johanson Dielectrics receives a lot of requests from our customers to help them with cracking issues. One cus-
tomer had cracking at a rate of 16% on 1206 size high voltage capacitors during their process. The top picture
of Figure 3 shows a clear mechanical crack with a 45 degree angle at the termination solder pad interface. Re-
populating the same board with PolyTerm
®
capacitors showed no cracking failures. The bottom picture of Figure
3 shows how PolyTerm
®
Capacitors solved these problems. No cracking was exhibited on any of the PolyTerm
®
capacitors during the customer assembly process.
Figure 3
5
15191 Bledsoe Street, Sylmar, California 91342 • (818) 364-9800• FAX (818) 364-6100
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
