P6KE6.8CA Series
600 Watt Peak Power
Surmetict−40 Zener
Transient Voltage
Suppressors
Bidirectional*
The P6KE6.8CA series is designed to protect voltage sensitive
components from high voltage, high energy transients. They have
excellent clamping capability, high surge capability, low zener
impedance and fast response time. These devices are
ON Semiconductor’s exclusive, cost-effective, highly reliable
Surmetic axial leaded package and is ideally-suited for use in
communication systems, numerical controls, process controls,
medical equipment, business machines, power supplies and many
other industrial/consumer applications.
Specification Features:
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•
•
•
•
•
•
•
•
Working Peak Reverse Voltage Range
−
5.8 to 171 V
Peak Power
−
600 Watts @ 1 ms
ESD Rating of class 3 (>16 KV) per Human Body Model
Maximum Clamp Voltage @ Peak Pulse Current
Low Leakage < 5
mA
above 10 V
Maximum Temperature Coefficient Specified
UL 497B for Isolated Loop Circuit Protection
Response Time is Typically < 1 ns
AXIAL LEAD
CASE 17
PLASTIC
Mechanical Characteristics:
CASE:
Void-free, Transfer-molded, Thermosetting plastic
FINISH:
All external surfaces are corrosion resistant and leads are
L
P6KE
xxxCA
YYWW
L = Assembly Location
P6KExxxCA = ON Device Code
YY = Year
WW = Work Week
readily solderable
MAXIMUM LEAD TEMPERATURE FOR SOLDERING PURPOSES:
230°C,
1/16” from the case for 10 seconds
POLARITY:
Cathode band does not imply polarity
MOUNTING POSITION:
Any
MAXIMUM RATINGS
Rating
Peak Power Dissipation (Note 1.)
@ T
L
≤
25°C
Steady State Power Dissipation
@ T
L
≤
75°C, Lead Length = 3/8″
Derated above T
L
= 75°C
Thermal Resistance,
Junction−to−Lead
Operating and Storage
Temperature Range
Symbol
P
PK
P
D
Value
600
5
50
R
qJL
T
J
, T
stg
20
−
55 to +175
Unit
Watts
Watts
mW/°C
°C/W
°C
ORDERING INFORMATION
Device
P6KExxxCA
P6KExxxCARL*
Package
Axial Lead
Axial Lead
Shipping
1000 Units/Box
4000/Tape & Reel
*P6KE170CA Not Available in 4000/Tape & Reel
1. Nonrepetitive current pulse per Figure 3 and derated above T
A
= 25°C
per Figure 2.
*Please see P6KE6.8A
−
P6KE200A for Unidirectional devices.
©
Semiconductor Components Industries, LLC, 2006
August, 2006
−
Rev. 4
1
Publication Order Number:
P6KE6.8CA/D
P6KE6.8CA Series
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C unless otherwise noted)
Symbol
I
PP
V
C
V
RWM
I
R
V
BR
I
T
QV
BR
Parameter
Maximum Reverse Peak Pulse Current
Clamping Voltage @ I
PP
Working Peak Reverse Voltage
Maximum Reverse Leakage Current @ V
RWM
Breakdown Voltage @ I
T
Test Current
Maximum Temperature Variation of V
BR
I
PP
I
T
V
C
V
BR
V
RWM
I
R
I
R
V
RWM
V
BR
V
C
I
T
I
PP
I
V
Bi−Directional TVS
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2
P6KE6.8CA Series
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C unless otherwise noted.)
V
RWM
(Note 1)
(Volts)
5.8
6.4
7.02
7.78
8.55
9.4
10.2
11.1
12.8
13.6
15.3
17.1
18.8
20.5
23.1
25.6
28.2
30.8
33.3
36.8
40.2
43.6
47.8
53
58.1
64.1
70.1
77.8
85.5
94
102
111
128
136
145
154
171
Breakdown Voltage
I
R
@ V
RWM
(mA)
1000
500
200
50
10
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
V
BR
(Note 2)
(Volts)
Min
6.45
7.13
7.79
8.65
9.5
10.5
11.4
12.4
14.3
15.2
17.1
19
20.9
22.8
25.7
28.5
31.4
34.2
37.1
40.9
44.7
48.5
53.2
58.9
64.6
71.3
77.9
86.5
95
105
114
124
143
152
162
171
190
Nom
6.80
7.51
8.2
9.1
10
11.05
12
13.05
15.05
16
18
20
22
24
27.05
30
33.05
36
39.05
43.05
47.05
51.05
56
62
68
75.05
82
91
100
110.5
120
130.5
150.5
160
170.5
180
200
Max
7.14
7.88
8.61
9.55
10.5
11.6
12.6
13.7
15.8
16.8
18.9
21
23.1
25.2
28.4
31.5
34.7
37.8
41
45.2
49.4
53.6
58.8
65.1
71.4
78.8
86.1
95.5
105
116
126
137
158
168
179
189
210
@ I
T
(mA)
10
10
10
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
V
C
@ I
PP
(Note 3)
V
C
(Volts)
10.5
11.3
12.1
13.4
14.5
15.6
16.7
18.2
21.2
22.5
25.2
27.7
30.6
33.2
37.5
41.4
45.7
49.9
53.9
59.3
64.8
70.1
77
85
92
103
113
125
137
152
165
179
207
219
234
246
274
I
PP
(A)
57
53
50
45
41
38
36
33
28
27
24
22
20
18
16
14.4
13.2
12
11.2
10.1
9.3
8.6
7.8
7.1
6.5
5.8
5.3
4.8
4.4
4
3.6
3.3
2.9
2.7
2.6
2.4
2.2
QV
BR
(%/°C)
0.057
0.061
0.065
0.068
0.073
0.075
0.078
0.081
0.084
0.086
0.088
0.09
0.092
0.094
0.096
0.097
0.098
0.099
0.1
0.101
0.101
0.102
0.103
0.104
0.104
0.105
0.105
0.106
0.106
0.107
0.107
0.107
0.108
0.108
0.108
0.108
0.108
Device
P6KE6.8CA
P6KE7.5CA
P6KE8.2CA
P6KE9.1CA
P6KE10CA
P6KE11CA
P6KE12CA
P6KE13CA
P6KE15CA
P6KE16CA
P6KE18CA
P6KE20CA
P6KE22CA
P6KE24CA
P6KE27CA
P6KE30CA
P6KE33CA
P6KE36CA
P6KE39CA
P6KE43CA
P6KE47CA
P6KE51CA
P6KE56CA
P6KE62CA
P6KE68CA
P6KE75CA
P6KE82CA
P6KE91CA
P6KE100CA
P6KE110CA
P6KE120CA
P6KE130CA
P6KE150CA
P6KE160CA
P6KE170CA*
P6KE180CA
P6KE200CA
Device
Marking
P6KE6.8CA
P6KE7.5CA
P6KE8.2CA
P6KE9.1CA
P6KE10CA
P6KE11CA
P6KE12CA
P6KE13CA
P6KE15CA
P6KE16CA
P6KE18CA
P6KE20CA
P6KE22CA
P6KE24CA
P6KE27CA
P6KE30CA
P6KE33CA
P6KE36CA
P6KE39CA
P6KE43CA
P6KE47CA
P6KE51CA
P6KE56CA
P6KE62CA
P6KE68CA
P6KE75CA
P6KE82CA
P6KE91CA
P6KE100CA
P6KE110CA
P6KE120CA
P6KE130CA
P6KE150CA
P6KE160CA
P6KE170CA*
P6KE180CA
P6KE200CA
1. A transient suppressor is normally selected according to the maximum working peak reverse voltage (V
RWM
), which should be equal to or
greater than the dc or continuous peak operating voltage level.
2. V
BR
measured at pulse test current I
T
at an ambient temperature of 25°C.
3. Surge current waveform per Figure 3 and derate per Figures 1 and 2.
*Not Available in the 4,000/Tape & Reel.
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3
P6KE6.8CA Series
NONREPETITIVE
PULSE WAVEFORM
SHOWN IN FIGURE 3
10
PEAK PULSE DERATING IN % OF
PEAK POWER OR CURRENT @ T = 25 C
A
°
100
PP K , PEAK POWER (kW)
100
80
60
40
20
0
0
25
50
75
100 125 150 175
200
1
0.1
0.1
ms
1
ms
10
ms
100
ms
1
ms
10
ms
t
P
, PULSE WIDTH
T
A
, AMBIENT TEMPERATURE (°C)
Figure 1. Pulse Rating Curve
Figure 2. Pulse Derating Curve
t
r
≤
10
ms
100
VALUE (%)
PEAK VALUE
−
I
PP
PULSE WIDTH (t
p
) IS
DEFINED AS THAT
POINT WHERE THE
PEAK CURRENT
DECAYS TO 50% OF I
PP
.
I
PP
2
HALF VALUE
−
50
t
P
0
0
1
2
3
t, TIME (ms)
4
Figure 3. Pulse Waveform
PD, STEADY STATE POWER DISSIPATION (WATTS)
3/8,
5
4
3
2
1
0
0
25
50
75 100 125 150 175
T
L
, LEAD TEMPERATURE (°C)
200
3/8,
DERATING FACTOR
1
0.7
0.5
0.3
0.2
0.1
0.07
0.05
0.03
0.02
0.01
0.1
10
ms
0.2
0.5
1
2
5
10
D, DUTY CYCLE (%)
20
50
100
PULSE WIDTH
10 ms
1 ms
100
ms
Figure 4. Steady State Power Derating
Figure 5. Typical Derating Factor for Duty Cycle
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4
P6KE6.8CA Series
APPLICATION NOTES
RESPONSE TIME
In most applications, the transient suppressor device is
placed in parallel with the equipment or component to be
protected. In this situation, there is a time delay associated
with the capacitance of the device and an overshoot
condition associated with the inductance of the device and
the inductance of the connection method. The capacitance
effect is of minor importance in the parallel protection
scheme because it only produces a time delay in the
transition from the operating voltage to the clamp voltage as
shown in Figure 6.
The inductive effects in the device are due to actual
turn-on time (time required for the device to go from zero
current to full current) and lead inductance. This inductive
effect produces an overshoot in the voltage across the
equipment or component being protected as shown in
Figure 7. Minimizing this overshoot is very important in the
application, since the main purpose for adding a transient
suppressor is to clamp voltage spikes. The P6KE6.8A series
has very good response time, typically < 1 ns and negligible
inductance. However, external inductive effects could
produce unacceptable overshoot. Proper circuit layout,
minimum lead lengths and placing the suppressor device as
close as possible to the equipment or components to be
protected will minimize this overshoot.
Some input impedance represented by Z
in
is essential to
prevent overstress of the protection device. This impedance
should be as high as possible, without restricting the circuit
operation.
DUTY CYCLE DERATING
The data of Figure 1 applies for non-repetitive conditions
and at a lead temperature of 25°C. If the duty cycle increases,
the peak power must be reduced as indicated by the curves
of Figure 5. Average power must be derated as the lead or
ambient temperature rises above 25°C. The average power
derating curve normally given on data sheets may be
normalized and used for this purpose.
At first glance the derating curves of Figure 5 appear to be
in error as the 10 ms pulse has a higher derating factor than
the 10
ms
pulse. However, when the derating factor for a
given pulse of Figure 5 is multiplied by the peak power value
of Figure 1 for the same pulse, the results follow the
expected trend.
TYPICAL PROTECTION CIRCUIT
Z
in
V
in
LOAD
V
L
V
V
in
(TRANSIENT)
V
L
V
OVERSHOOT DUE TO
INDUCTIVE EFFECTS
V
in
(TRANSIENT)
V
L
V
in
t
d
t
D
= TIME DELAY DUE TO CAPACITIVE EFFECT
t
t
Figure 6.
Figure 7.
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