CeraDiode
CDS4C12GTA
SMD type, case size 1003
B72570D0120A060
Preliminary data
ISSUE DATE
16.11.2004
ISSUE
b
PUBLISHER
KB VS PE
PAGE
1/7
CeraDiode
Reliable surface mount ESD protection of single lines
For 1:1 drop in replacement of SOD-323 diode packages
without change of PCB layout
Description
Due to the ongoing miniaturization, today's electronic devices are more and more sensitive to
electrostatic discharges (ESD) and overvoltages. Therefore reliable protection components become
absolutely necessary to harden your valuable electronics against the impact of ESD.
CeraDiodes are ceramic semiconductors optimized specifically for high performance in Electro Static
Discharge (ESD) applications. The device has a non-linear voltage/current characteristic that is highly
optimized for effectively suppressing extremely fast voltage transients. The device offers superior
parametric stability over the complete operating range of 40 C to +85 C.
CeraDiodes are bi-directional devices. A single CeraDiode
connected from signal/dataline to ground
routes both positive and negative ESD transitions safely to the ground plane. This technique
eliminates the need to route ESD charge into the power plane, possibility damaging nearby integrated
circuits.
Features
ESD protection according to IEC 61000-4-2 (Level 4)
High ESD robustness: 3000 ESD pulses minimum (IEC 61000-4-2 Level 4)
Suitable for uni- and bidirectional lines
Bidirectional ESD protection in a two-pin device
Routes all ESD events, both positive and negative, safely to ground
Suitable for DC working voltages up to 12 V
No derating of maximum ratings up to 85 C
Surface mount package in SOD-323 case size (inch case size is 1003)
Extremely fast response time < 0.5 ns
Lead free nickel barrier terminations
Application
Desktop and notebook computers
Peripherals
Portable handheld products (e.g. PDA)
Mobile communication
Consumer products (set top box, MP3 player, digital cameras,...)
Liquid crystal displays (LCD) / monitors
CeraDiode
CDS4C12GTA
SMD type, case size 1003
B72570D0120A060
Preliminary data
ISSUE DATE
16.11.2004
ISSUE
b
PUBLISHER
KB VS PE
PAGE
2/7
Application example
Protection of I/O lines with discrete CeraDiodes
Maximum ratings (T
A
= 85 C)
Rating Symb.
Value
Unit
Max. DC working voltage
V
DC
12 V
Max. RMS working voltage
V
RMS
9 V
Peak current
@
8/ 20 s
I
PP
20 A
Air discharge ESD capability
(according to IEC 61000-4-2 method)
V
ESD
15 kV
Contact discharge ESD capability
(according to IEC 61000-4-2 method)
V
ESD
8 kV
Operating temperature
(without derating)
T
op
-
40 to +85
C
Storage temperature
T
stg
-
40 to +125
C
ESD
sensitive
device
I/O
CDS
Ground
CeraDiode
CDS4C12GTA
SMD type, case size 1003
B72570D0120A060
Preliminary data
ISSUE DATE
16.11.2004
ISSUE
b
PUBLISHER
KB VS PE
PAGE
3/7
Characteristics (T
A
= 25 C)
Parameter Symb.
Conditions
Minimum
Typical
Maximum
Unit
Breakdown voltage
V
BR
I
BR
= 1 mA
18
-
-
V
Leakage current
*)
I
leak
V
leak
= 12 V
-
-
10
A
Clamping voltage
V
clamp
I
PP
= 1 A, 8/20 s
-
-
46
V
Capacitance
C
V = 1 V, f = 1 MHz
-
68
-
pF
*)
Any lower operating voltage than 12 V results in a lower leakage current
Typical characteristics
0
10
20
30
40
50
60
70
80
90
100
%
-55
70
80
90
100
110
120
130
140
150 C
Ambient temperature
Max. current, energy and average power dissipation
depending on ambient temperature
CeraDiode
CDS4C12GTA
SMD type, case size 1003
B72570D0120A060
Preliminary data
ISSUE DATE
16.11.2004
ISSUE
b
PUBLISHER
KB VS PE
PAGE
5/7
Recommended soldering profiles
100 s
at max. temp.
100
20
0
50
100
Preheating zone
max. 2
180
T
245
215
300
Soldering zone
max. 7 s
150
200
VAR0543-W-E
250
t
s
(natural air cooling)
40 s
max. 2
Cooling-down zone
C
C/s
C/s
As far as possible, the components shall be employed within 12 months. They should be left in their
original packings to avoid soldering problems due to oxidized contacts. Storage temperature: 25 to
45 C. Relative humidity: <75 % annual average, <95 % on max. 30 days in a year.
The usage of mild, non activated fluxes for soldering is recommended, as well as proper cleaning of
the PCB.
Reel dimensions
Package: 8 mm tape
Reel material: plastic
Definition Symb.
Dim.
Tol.
Unit
Reel diameter
A
180
+0 /
-
3
mm
Reel width
(inside)
W
1
8.4
+1.5/
-
0
mm
Reel width
(outside)
W
2
14.4 max.
mm
Reflow soldering Wave soldering
KKE0058-I-E
W
1
2
W
A
130,2
Direction of unreeling
+2
0
60
_
2nd solder
Cooling-down zone
max. 5
100
20
0
50
100
1st solder
max. 2
Preheating zone
130
T
235
200
260
300
Soldering zone
max. 5 s
150
200
250
VAR0550-F-E
t
s
C
C/s
C/s (natural air cooling)
at max. temp.
10 s
wave
wave
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