TVS Diodes
Surface Mount > 600W > SZP6SMB Series
SZP6SMB Series
RoHS
Pb e3
Description
The SZP6SMB series is designed to protect voltage
sensitive components from high voltage, high energy
transients. They have excellent clamping capability, high
surge capability, low breakdown impedance and fast
response time. The SZP6SMB series is supplied in the
Littelfuse exclusive, cost-effective, highly reliable package
and is ideally suited for use in communication systems,
automotive, numerical controls, process controls, medical
equipment, business machines, power supplies and many
other industrial/consumer applications.
Bi-directional
Uni-directional
Features
Agency Approvals
Agency
Agency File Number
E128662
Maximum Ratings and Thermal Characteristics
Parameter
Symbol
Value
Unit
Peak Power Dissipation (Note 1) @ TL =
25°C, Pulse Width = 1 ms
PPK
600
W
PD
3.0
40
25
W
mW/°C
°C/W
W
mW/°C
°C/W
DC Power Dissipation @ TL = 75°C
Measured Zero Lead Length (Note 2)
Derate Above 75°C
Thermal Resistance from Junction−
to−Lead
RƟJL
DC Power Dissipation (Note 3) @ TA =
25°C Derate Above 25°C
Thermal Resistance from Junction–to–
Ambient
RƟJA
0.55
4.4
226
Forward Surge Current (Note 4) @ TA
= 25°C
IFSM
100
A
Operating and Storage Temperature
Range
TJ, Tstg
-65 to
+150
°C
PD
Stresses exceeding those listed in the Maximum Ratings table may damage the component.
If any of these limits are exceeded, device functionality should not be assumed, damage
may occur and reliability may be affected.
1. 10/1000 µs, non−repetitive.
2. 1” square copper pad, FR−4 board.
3. FR−4 board, using Littelfuse minimum recommended footprint
4. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per
minute maximum. For Unidirectonal only.
• Zener Transient
Overvoltage Suppressors
• Low Leakage < 5 µA
Above 10 V
• Working Peak Reverse
Voltage Range − 5.8 to
171 V (for Uni-directional),
9.4 to 70.1 V (for Bidirectional)
• Response Time is
Typically < 1 ns
• Standard Breakdown
Voltage Range − 6.45 to
210V for Uni-directional
, 10.5 to 86.1V for Bidirectional
• Peak Power − 600 W @ 1
ms
• ESD Rating of Class 3 (>
16 kV) per Human Body
Model
• Pb-free means 2nd level
interconnect is Pb-free
and the terminal finish
material is tin(Sn) (IPC/
JEDEC J-STD-609A.01)
• SZ Prefix for Automotive
and Other Applications
Requiring Unique Site
and Control Change
Requirements; AEC−
Q101 Qualified and PPAP
Capable
• Maximum Clamp Voltage
@ Peak Pulse Current
Additional Information
Datasheet
Resources
Samples
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 01/08/21
TVS Diodes
Surface Mount > 600W > SZP6SMB Series
Functional Diagram
Bi-directional
Cathode
Anode
Uni-directional
I-V Curve Characteristics
(TA = 25°C unless otherwise noted, VF = 3.5 V Max. @ IF (Note 5) = 30 A)
Uni-directional
Symbol
Maximum Reverse Peak Pulse Current
VC
Clamping Voltage @ IPP
IR
Vc VBR VR
V
IR VF
IT
IPP
I-V Curve Characteristics (T
A
Parameter
IPP
VRWM
VBR
Working Peak Reverse Voltage
Maximum Reverse Leakage Current @ VRWM
Breakdown Voltage @ IT
IT
On-State Current
VF
Forward Voltage @ IF
IF
Forward Current
5. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, non−repetitive duty cycle.
= 25°C unless otherwise noted) – For
Bi-directional
Symbol
Bi-Directional
IPP
Vc VBR VR
For Uni-directional
IT
IR
IR
IT
VR VBR VC
V
Parameter
IPP
Maximum Reverse Peak Pulse Current
VC
Clamping Voltage @ IPP
VRWM
Working Peak Reverse Voltage
IR
Maximum Reverse Leakage Current @ VRWM
VBR
Breakdown Voltage @ IT
IT
Test Current
IPP
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 01/08/21
TVS Diodes
Surface Mount > 600W > SZP6SMB Series
Electrical Characteristics - For Unidirectional
VC @ IPP
(Note 8)
Breakdown Voltage
Component
Component
Marking
SZP6SMB6.8AT3G
6V8A
VRWM
IR @
VRWM
Volts
µA
MIN
NOM
5.8
1000
6.45
6.8
(Note 6)
VBR @ IT (V) (Note 7)
VBR
C Typ.
(Note 9)
@ IT
VC
IPP
MAX
mA
Volts
Amps
%/°C
pF
7.14
10
10.5
57
0.057
2380
2180
SZP6SMB7.5AT3G
7V5A
6.4
500
7.13
7.51
7.88
10
11.3
53
0.061
SZP6SMB8.2AT3G
8V2A
7.02
200
7.79
8.2
8.61
10
12.1
50
0.065
2015
SZP6SMB9.1AT3G
9V1A
7.78
50
8.65
9.1
9.55
1
13.4
45
0.068
1835
SZP6SMB10AT3G
10A
8.55
10
9.5
10
10.5
1
14.5
41
0.073
1690
SZP6SMB12AT3G
12A
10.2
5
11.4
12
12.6
1
16.7
36
0.078
1435
SZP6SMB13AT3G
13A
11.1
5
12.4
13.05
13.7
1
18.2
33
0.081
1335
SZP6SMB15AT3G
15A
12.8
5
14.3
15.05
15.8
1
21.2
28
0.084
1175
SZP6SMB16AT3G
16A
13.6
5
15.2
16
16.8
1
22.5
27
0.086
1110
SZP6SMB18AT3G
18A
15.3
5
17.1
18
18.9
1
25.2
24
0.088
1000
SZP6SMB20AT3G
20A
17.1
5
19
20
21
1
27.7
22
0.09
910
SZP6SMB22AT3G
22A
18.8
5
20.9
22
23.1
1
30.6
20
0.092
835
SZP6SMB24AT3G
24A
20.5
5
22.8
24
25.2
1
33.2
18
0.094
775
SZP6SMB27AT3G
27A
23.1
5
25.7
27.05
28.4
1
37.5
16
0.096
700
SZP6SMB30AT3G
30A
25.6
5
28.5
30
31.5
1
41.4
14.4
0.097
635
SZP6SMB33AT3G
33A
28.2
5
31.4
33.05
34.7
1
45.7
13.2
0.098
585
SZP6SMB36AT3G
36A
30.8
5
34.2
36
37.8
1
49.9
12
0.099
540
SZP6SMB39AT3G
39A
33.3
5
37.1
39.05
41
1
53.9
11.2
0.1
500
SZP6SMB43AT3G
43A
36.8
5
40.9
43.05
45.2
1
59.3
10.1
0.101
460
SZP6SMB47AT3G
47A
40.2
5
44.7
47.05
49.4
1
64.8
9.3
0.101
425
SZP6SMB51AT3G
51A
43.6
5
48.5
51.05
53.6
1
70.1
8.6
0.102
395
SZP6SMB56AT3G
56A
47.8
5
53.2
56
58.8
1
77
7.8
0.103
365
SZP6SMB62AT3G
62A
53
5
58.9
62
65.1
1
85
7.1
0.104
335
SZP6SMB68AT3G
68A
58.1
5
64.6
68
71.4
1
92
6.5
0.104
305
SZP6SMB75AT3G
75A
64.1
5
71.3
75.05
78.8
1
103
5.8
0.105
280
SZP6SMB91AT3G
91A
77.8
5
86.5
91
95.5
1
125
4.8
0.106
235
SZP6SMB100AT3G
100A
85.5
5
95
100
105
1
137
4.4
0.106
215
SZP6SMB120AT3G
120A
102
5
114
120
126
1
165
3.6
0.107
185
SZP6SMB130AT3G
130A
111
5
124
130.5
137
1
179
3.3
0.107
170
SZP6SMB150AT3G
150A
128
5
143
150.5
158
1
207
2.9
0.108
150
SZP6SMB160AT3G
160A
136
5
152
160
168
1
219
2.7
0.108
140
SZP6SMB180AT3G
180A
154
5
171
180
189
1
246
2.4
0.108
130
SZP6SMB200AT3G
200A
171
5
190
200
210
1
274
2.2
0.108
115
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 01/08/21
TVS Diodes
Surface Mount > 600W > SZP6SMB Series
Electrical Characteristics - For Bidirectional
Component
Component
Marking
VRWM
(Note 6)
Volts
VC @ IPP
(Note 8)
Breakdown Voltage
IR @
VRWM
VBR @ IT (V) (Note 7)
µA
MIN
NOM
MAX
VBR
C Typ.
(Note 9)
Amps
%/°C
pF
@ IT
VC
IPP
mA
Volts
SZP6SMB11CAT3G
11C
9.4
5
10.5
11.05
11.6
1
15.6
38
0.075
865
SZP6SMB12CAT3G
12C
10.2
5
11.4
12
12.6
1
16.7
36
0.078
800
SZP6SMB15CAT3G
15C
12.8
5
14.3
15.05
15.8
1
21.2
28
0.084
645
SZP6SMB16CAT3G
16C
13.6
5
15.2
16
16.8
1
22.5
27
0.086
610
SZP6SMB18CAT3G
18C
15.3
5
17.1
18
18.9
1
25.2
24
0.088
545
SZP6SMB20CAT3G
20C
17.1
5
19
20
21
1
27.7
22
0.09
490
SZP6SMB22CAT3G
22C
18.8
5
20.9
22
23.1
1
30.6
20
0.09
450
SZP6SMB24CAT3G
24C
20.5
5
22.8
24
25.2
1
33.2
18
0.094
415
SZP6SMB27CAT3G
27C
23.1
5
25.7
27.05
28.4
1
37.5
16
0.096
370
SZP6SMB30CAT3G
30C
25.6
5
28.5
30
31.5
1
41.4
14.4
0.097
335
SZP6SMB33CAT3G
33C
28.2
5
31.4
33.05
34.7
1
45.7
13.2
0.098
305
SZP6SMB36CAT3G
36C
30.8
5
34.2
36
37.8
1
49.9
12
0.099
280
SZP6SMB39CAT3G
39C
33.3
5
37.1
39.05
41
1
53.9
11.2
0.1
260
SZP6SMB43CAT3G
43C
36.8
5
40.9
43.05
45.2
1
59.3
10.1
0.101
240
SZP6SMB47CAT3G
47C
40.2
5
44.7
47.05
49.4
1
64.8
9.3
0.101
220
SZP6SMB51CAT3G
51C
43.6
5
48.5
51.05
53.6
1
70.1
8.6
0.102
205
SZP6SMB56CAT3G
56C
47.8
5
53.2
56
58.8
1
77
7.8
0.103
185
SZP6SMB62CAT3G
62C
53
5
58.9
62
65.1
1
85
7.1
0.104
170
SZP6SMB68CAT3G
68C
58.1
5
64.6
68
71.4
1
92
6.5
0.104
155
SZP6SMB82CAT3G
82C
70.1
5
77.9
82
86.1
1
113
5.3
0.105
130
6. A transient suppressor is normally selected according to the working peak reverse voltage (VRWM), which should be equal to or greater than the DC or
continuous peak operating voltage level.
7. VBR measured at pulse test current IT at an ambient temperature of 25°C.
8. Surge current waveform per Figure 2 and derate per Figure 3 of the General Data − 600 Watt at the beginning of this group.
9. Bias Voltage = 0 V, F = 1 MHz, TJ = 25°C
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 01/08/21
TVS Diodes
Surface Mount > 600W > SZP6SMB Series
Ratings and Characteristic Curves - For Unidirectional
Figure 1. Pulse Rating Curve
Figure 2. Pulse Waveform
Pulse Width (tP) is defined as
that point where the peak
current decays to 50% of IPP
tr ≤10μs
Non-Repetitive
Pulse Waveform
10.0
Peak Value . IPP
Value (%)
Ppk, Peak Power (KW)
100.0
1.0
Half Value .
IPP
2
tP
0.1
0.0001
0.001
0.01
0.1
1
10
t, Time (ms)
tp, Pulse Width(ms)
Figure 4. Typical Junction Capacitance vs. Bias Voltage
SZP6SMB6.8AT3G
120
C, Capaciance (pF)
PEAK PULSE DERATING IN % OF
PEAK CURRENT
Figure 3. Surge Derating Curve
10*1000 WAVEFORM
100
80
60
40
SZP6SMB18AT3G
SZP6SMB51AT3G
SZP6SMB200AT3G
20
0
TJ = 25°C
f = 1 MHz
0
25
50
75
100
125
150
175
TA AMBIENT TEMPERATRUE(˚C)
Bias Voltage (Volts)
Figure 5. Typical Junction Capacitance vs. Bias Voltage
1000
Figure 6. Typical Protection Circuit
SZP6SMB11CAT3G
C, Capaciance (pF)
SZP6SMB18CAT3G
in
SZP6SMB47CAT3G
100
SZP6SMB91CAT3G
in
10
TJ = 25°C
f = 1 MHz
1
1
10
10
Bias Voltage (Volts)
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 01/08/21
TVS Diodes
Surface Mount > 600W > SZP6SMB Series
Soldering Parameters
Lead–free assembly
Pre Heat
- Temperature Min (Ts(min))
150°C
- Temperature Max (Ts(max))
200°C
- Time (min to max) (ts)
60 – 120 secs
Average ramp up rate (Liquidus Temp (TL) to peak 3°C/second max
3°C/second max
TS(max) to TL - Ramp-up Rate
217°C
- Temperature (TL) (Liquidus)
Reflow
60 – 150 seconds
- Time (min to max) (tL)
tp
TP
Peak Temperature (TP)
260+0/-5 °C
Time within 5°C of actual peak Temperature (tp)
30 seconds max
Ramp-down Rate
6°C/second max
Time 25°C to peak Temperature (TP)
8 minutes max.
Do not exceed
260°C
Ramp-up
TL
Temperature (T)
Reflow Condition
Critical Zone
TL to TP
tL
Ts(max)
Ramp-down
Ts(min)
ts
Preheat
25˚C
t 25˚C to Peak
Time (t)
Environmental Specifications
Physical Specifications
0.00326 ounce, 0.1015 grams
Weight
Case
JEDEC DO214AA. Void-Free, Transfer-Molded,
Thermosetting Plastic Epoxy Meets UL 94V-0
Polarity
Color band denotes cathode for unidirectional
components.
Terminal
Matte Tin-plated leads, Solderable per
JESD22-B102
Dimensions
High Temp. Storage
JESD22-A103
HTRB
JESD22-A108
Temperature Cycling
JESD22-A104
MSL
JEDEC-J-STD-020, Level 1
H3TRB
JESD22-A101
RSH
JESD22-A111
Soldering Footprint
HE
2.261
E
bD D
A
L
L1
A1
c
Inches
Dim
Millimeters
Min
Nom
Max
Min
Nom
Max
A
0.077
0.091
0.097
1.95
2.30
2.47
A1
0.002
0.004
0.008
0.05
0.10
0.20
b
0.077
0.080
0.087
1.96
2.03
2.20
c
0.006
0.009
0.012
0.15
0.23
0.31
D
0.130
0.140
0.156
3.30
3.56
3.95
E
0.160
0.170
0.181
4.06
4.32
4.60
HE
0.205
0.214
0.220
5.21
5.44
5.60
L
0.030
0.040
0.063
0.76
1.02
1.60
L1
0.51 REF
Ordering Information
Device
SZP6SMBxxxAT3G
SZP6SMBxxxCAT3G
Package
Shipping
SMB
(Pb−Free)
2,500 /
Tape & Reel
SMB
(Pb−Free)
2,500 /
Tape & Reel
0.020 REF
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 01/08/21
TVS Diodes
Surface Mount > 600W > SZP6SMB Series
Part Marking System
Part Numbering System
1
Cathode
SZ P6SMB xx CA T3 G
2
Anode
Pb Free Plating
Tape/Reel Designator
XXXX =Device Code (max four digits)
Y
=Year
M
=Month
A
=Assembly Location
WW =Lot Code
Type Code
CA Bi-Directional TVS
A Uni Directional TVS
SMB TVS
VBR VOLTAGE
Zener Automotive
Tape and Reel Specification
0.157
(4.0)
Cathode mark for
uni-directional components
0.47
(12.0)
0.315
(8.0)
0.061 DIA
(1.55)
Cover tape
13.0 (330)
0.80 (20.2)
Arbor Hole Dia.
0.52
(13.3)
Dimensions are in inches
(and millimeters).
Direction of Feed
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and
test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete
Disclaimer Notice at: www.littelfuse.com/disclaimer-electronics.
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 01/08/21
