OBSOLETE/EOL
DATE June/30/2018 PCN/ECN# LFPCN41246
REPLACED BY P6KE Series
P6KE6.8A Series
600 Watt Peak Power
Littelfuse -40 Transient
Voltage Suppressors
Unidirectional*
Littelfuse.com
The P6KE6.8A series is designed to protect voltage sensitive
components from high voltage, high energy transients. They have
excellent clamping capability, high surge capability and fast response
time. These devices are the Littelfuse exclusive, costeffective, highly reliable 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.
Cathode
Anode
Features:
•
•
•
•
•
•
•
•
•
Working Peak Reverse Voltage Range − 5.8 to 171 V
Peak Power − 600 W @ 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
Pb−Free Packages are Available
AXIAL LEAD
CASE 017AA
PLASTIC
MARKING DIAGRAM
Mechanical Characteristics:
CASE: Void-free, Transfer-molded, Thermosetting plastic
FINISH: All external surfaces are corrosion resistant and leads are
A
P6KE
xxxA
YYWW
readily solderable
MAXIMUM LEAD TEMPERATURE FOR SOLDERING:
260C, 1/16″ from the case for 10 seconds
POLARITY: Cathode indicated by polarity band
MOUNTING POSITION: Any
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Peak Power Dissipation (Note 1) @ TL ≤ 25°C
PPK
600
W
Steady State Power Dissipation
@ TL ≤ 25°C, Lead Length = 3/8 in
Derated above TL = 50°C
PD
5.0
W
50
mW/°C
Thermal Resistance, Junction−to−Lead
RqJL
20
°C/W
Forward Surge Current (Note 2) @ TA = 25°C
IFSM
100
A
Operating and Storage Temperature Range
TJ, Tstg
− 55 to
+150
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum
Ratings are stress ratings only. Functional operation above the Recommended
Operating Conditions is not implied. Extended exposure to stresses above the
Recommended Operating Conditions may affect device reliability.
1. Nonrepetitive current pulse per Figure 4 and derated above TA = 25°C per
Figure 2.
2. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses
per minute maximum.
Specifications subject to change without notice. © 2016 Littelfuse, Inc.
September 19, 2016 − Rev. 10
1
A
= Assembly Location
P6KExxxA = Device Number
YY
= Year
WW
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
Device
Package
Shipping
P6KExxxA
Axial Lead
1000 Units / Box
P6KExxxAG
Axial Lead
(Pb−Free)
1000 Units / Box
P6KExxxARL
Axial Lead
4000/Tape & Reel
P6KExxxARLG
Axial Lead 4000/Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
Publication Order Number:
P6KE6.8A/D
P6KE6.8A Series
ELECTRICAL CHARACTERISTICS (TA = 25°C unless
otherwise noted, VF = 3.5 V Max. @ IF (Note 6) = 50 A)
Symbol
Parameter
IF
IPP
Maximum Reverse Peak Pulse Current
VC
Clamping Voltage @ IPP
VRWM
IR
VBR
IT
QVBR
I
Working Peak Reverse Voltage
VC VBR VRWM
Maximum Reverse Leakage Current @ VRWM
V
IR VF
IT
Breakdown Voltage @ IT
Test Current
Maximum Temperature Coefficient of VBR
IF
Forward Current
VF
Forward Voltage @ IF
IPP
Uni−Directional TVS
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted, VF = 3.5 V Max. @ IF (Note 6) = 50 A)
Device*
Device
Marking
VC @ IPP (Note 5)
Breakdown Voltage
VRWM
(Note 3)
IR @ VRWM
(Note 4) (V)
@ IT
VC
IPP
QVBR
V
mA
Min
Nom
Max
mA
V
A
%/°C
VBR
P6KE6.8A, G
P6KE7.5ARLG
P6KE6.8A
P6KE7.5A
5.8
6.4
1000
500
6.45
7.13
6.80
7.51
7.14
7.88
10
10
10.5
11.3
57
53
0.057
0.061
P6KE10AG
P6KE12A, G
P6KE13AG
P6KE10A
P6KE12A
P6KE13A
8.55
10.2
11.1
10
5
5
9.5
11.4
12.4
10
12
13.05
10.5
12.6
13.7
1
1
1
14.5
16.7
18.2
41
36
33
0.073
0.078
0.081
P6KE15AG
P6KE16A, G
P6KE18AG
P6KE20ARLG
P6KE15A
P6KE16A
P6KE18A
P6KE20A
12.8
13.6
15.3
17.1
5
5
5
5
14.3
15.2
17.1
19
15.05
16
18
20
15.8
16.8
18.9
21
1
1
1
1
21.2
22.5
25.2
27.7
28
27
24
22
0.084
0.086
0.088
0.09
P6KE22ARLG
P6KE24ARLG
P6KE27ARLG
P6KE30ARLG
P6KE22A
P6KE24A
P6KE27A
P6KE30A
18.8
20.5
23.1
25.6
5
5
5
5
20.9
22.8
25.7
28.5
22
24
27.05
30
23.1
25.2
28.4
31.5
1
1
1
1
30.6
33.2
37.5
41.4
20
18
16
14.4
0.092
0.094
0.096
0.097
P6KE33AG
P6KE36AG
P6KE39AG
P6KE43AG
P6KE33A
P6KE36A
P6KE39A
P6KE43A
28.2
30.8
33.3
36.8
5
5
5
5
31.4
34.2
37.1
40.9
33.05
36
39.05
43.05
34.7
37.8
41
45.2
1
1
1
1
45.7
49.9
53.9
59.3
13.2
12
11.2
10.1
0.098
0.099
0.1
0.101
P6KE47AG
P6KE51AG
P6KE56AG
P6KE62ARLG
P6KE47A
P6KE51A
P6KE56A
P6KE62A
40.2
43.6
47.8
53
5
5
5
5
44.7
48.5
53.2
58.9
47.05
51.05
56
62
49.4
53.6
58.8
65.1
1
1
1
1
64.8
70.1
77
85
9.3
8.6
7.8
7.1
0.101
0.102
0.103
0.104
P6KE68AG
P6KE75ARLG
P6KE82ARLG
P6KE91ARLG
P6KE68A
P6KE75A
P6KE82A
P6KE91A
58.1
64.1
70.1
77.8
5
5
5
5
64.6
71.3
77.9
86.5
68
75.05
82
91
71.4
78.8
86.1
95.5
1
1
1
1
92
103
113
125
6.5
5.8
5.3
4.8
0.104
0.105
0.105
0.106
P6KE100ARLG
P6KE120ARLG
P6KE130AG
P6KE100A
P6KE120A
P6KE130A
85.5
102
111
5
5
5
95
114
124
100
120
130.5
105
126
137
1
1
1
137
165
179
4.4
3.6
3.3
0.106
0.107
0.107
P6KE150AG
P6KE150A
128
5
143
150.5
158
1
207
2.9
0.108
P6KE160ARLG
P6KE160A
136
5
152
160
168
1
219
2.7
0.108
P6KE180ARLG
P6KE180A
154
5
171
180
189
1
246
2.4
0.108
P6KE200A, G
P6KE200A
171
5
190
200
210
1
274
2.2
0.108
3. A transient suppressor is normally selected according to the maximum working peak reverse voltage (VRWM), which should be equal to or
greater than the dc or continuous peak operating voltage level.
4. VBR measured at pulse test current IT at an ambient temperature of 25°C
5. Surge current waveform per Figure 4 and derate per Figures 1 and 2.
6. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per minute maximum.
*The “G’’ suffix indicates Pb−Free package or Pb−Free Packages are available.
Specifications subject to change without notice. © 2016 Littelfuse, Inc.
September 19, 2016 − Rev. 10
2
Publication Order Number:
P6KE6.8A/D
PPK , PEAK POWER (kW)
100
PEAK PULSE DERATING IN % OF
PEAK POWER OR CURRENT @ TA = 25 C
P6KE6.8A Series
NONREPETITIVE PULSE
WAVEFORM SHOWN IN
FIGURE 4
10
100
1
0.1
0.1 ms
1 ms
10 ms
1 ms
100 ms
10 ms
tP, PULSE WIDTH
80
60
40
20
0
0
25
50
75
100 125 150 175
TA, AMBIENT TEMPERATURE (C)
Figure 2. Pulse Derating Curve
Figure 1. Pulse Rating Curve
tr ≤ 10 ms
PEAK VALUE − IPP
100
VALUE (%)
C, CAPACITANCE (pF)
10,000
MEASURED @
ZERO BIAS
1000
HALF VALUE −
50
MEASURED @
VRWM
100
10
0.1
0
1000
0
1
3/8″
3/8″
4
3
2
2
3
t, TIME (ms)
4
1
0.7
0.5
DERATING FACTOR
PD, STEADY STATE POWER DISSIPATION (WATTS)
IPP
2
Figure 4. Pulse Waveform
Figure 3. Capacitance versus Breakdown Voltage
0.3
0.2
PULSE WIDTH
10 ms
0.1
0.07
0.05
1 ms
0.03
100 ms
0.02
1
0
PULSE WIDTH (tp) IS
DEFINED AS THAT
POINT WHERE THE
PEAK CURRENT
DECAYS TO 50% OF IPP.
tP
1
10
100
VBR, BREAKDOWN VOLTAGE (VOLTS)
5
0.01
0
25
50
75 100 125 150 175
TL, LEAD TEMPERATURE C)
200
Figure 5. Steady State Power Derating
Specifications subject to change without notice. © 2016 Littelfuse, Inc.
September 19, 2016 − Rev. 10
200
10 ms
0.1
0.2
0.5
1
2
5
10
D, DUTY CYCLE (%)
20
50 100
Figure 6. Typical Derating Factor for Duty Cycle
3
Publication Order Number:
P6KE6.8A/D
P6KE6.8A Series
APPLICATION NOTES
RESPONSE TIME
suppressor device as close as possible to the equipment or
components to be protected will minimize this overshoot.
Some input impedance represented by Zin is essential to
prevent overstress of the protection device. This impedance
should be as high as possible, without restricting the circuit
operation.
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 7.
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 8. 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
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 6. 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 6 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 6 is multiplied by the peak power value of
Figure 1 for the same pulse, the results follow the expected
trend.
TYPICAL PROTECTION CIRCUIT
Zin
LOAD
Vin
V
V
Vin (TRANSIENT)
VL
OVERSHOOT DUE TO
INDUCTIVE EFFECTS
Vin (TRANSIENT)
VL
VL
Vin
td
tD = TIME DELAY DUE TO CAPACITIVE EFFECT
t
Figure 8.
Figure 7.
t
UL RECOGNITION*
The entire series including the bidirectional CA suffix has
Underwriters Laboratory Recognition for the classification of
protectors (QVGQ2) under the UL standard for safety 497B
and File #E128662 . Many competitors only have one or two
devices recognized or have recognition in a non-protective
category. Some competitors have no recognition at all. With
the UL497B recognition, our parts successfully passed several
Specifications subject to change without notice. © 2016 Littelfuse, Inc.
September 19, 2016 − Rev. 10
tests including Strike Voltage Breakdown test, Endurance
Conditioning, Temperature test, Dielectric Voltage-Withstand
test, Discharge test and several more.
Whereas, some competitors have only passed a flammability
test for the package material, we have been recognized for
much more to be included in their protector category.
*Applies to P6KE6.8A − P6KE200A.
4
Publication Order Number:
P6KE6.8A/D
P6KE6.8A Series
PACKAGE DIMENSIONS
LITTELFUSE 40, AXIAL
LEAD
CASE 017AA−01
ISSUE O
NOTES:
1. CONTROLLING DIMENSION: INCH
2. LEAD DIAMETER AND FINISH NOT CONTROLLED
WITHIN DIMENSION F.
3. CATHODE BAND INDICATES POLARITY
B
DIM
A
B
D
F
K
D
F
K
INCHES
MIN
MAX
0.330
0.350
0.130
0.145
0.037
0.043
--0.050
1.000
1.250
MILLIMETERS
MIN
MAX
8.38
8.89
3.30
3.68
0.94
1.09
--1.27
25.40
31.75
A
K
F
Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military,
aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or
any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property
damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be
deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be
liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in
applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale,
unless otherwise agreed by Littelfuse.
Littelfuse.com
Specifications subject to change without notice. © 2016 Littelfuse, Inc.
September 19, 2016 − Rev. 10
5
Publication Order Number:
P6KE6.8A/D