© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/13/17
TVS Diodes
Surface Mount > 600W > SZP6SMB Series
• Working Peak Reverse Voltage Range − 5.8 to 171 V
(for Uni-directional), 9.4 to 77.8 V (for Bi-directional)
• Standard Zener Breakdown Voltage Range − 6.8 to 200 V
(for Uni-directional) , 11 to 91 V (for Bi-directional)
• 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 µA Above 10 V
• UL 497B for Isolated Loop Circuit Protection
• Response Time is Typically < 1 ns
• 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
Features
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 zener 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.
Description
Parameter Symbol Value Unit
Peak Power Dissipation (Note 1) @ TL =
25°C, Pulse Width = 1 ms PPK 600 W
DC Power Dissipation @ TL = 75°C
Measured Zero Lead Length (Note 2)
Derate Above 75°C
Thermal Resistance from Junction−to−
Lead
PD
R JL
3.0
40
25
W
mW/°C
°C/W
DC Power Dissipation (Note 3) @ TA =
25°C Derate Above 25°C
Thermal Resistance from Junction–to–
Ambient
PD
R0JA
0.55
4.4
226
W
mW/°C
°C/W
Forward Surge Current (Note 4) @ TA
= 25°C
IFSM 100 A
Operating and Storage Temperature
Range TJ, Tstg
-65 to
+150 °C
Maximum Ratings and Thermal Characteristics
SZP6SMB Series
Pb
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If
any of these limits are exceeded, device functionality should not be assumed, damage may
occur and reliability may be affected.
1. 10 X 1000 µs, non−repetitive.
2. 1” square copper pad, FR−4 board.
3. FR−4 board, using Littelfuse minimum recommended footprint, as shown in 403A-03
case outline dimensions spec.
4. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per
minute maximum. For Unidirectonal only.
Additional Information
Samples
Resources
Datasheet
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/13/17
TVS Diodes
Surface Mount > 600W > SZP6SMB Series
Symbol Parameter
IPP Maximum Reverse Peak Pulse Current
VCClamping Voltage @ IPP
VRWM Working Peak Reverse Voltage
IRMaximum Reverse Leakage Current @ VRWM
VBR Breakdown Voltage @ IT
ITTest Current
IFMaximum Temperature Coefficient of VBR
VFForward Voltage @ IF
I-V Curve Characteristics (TA = 25°C unless otherwise noted, VF = 3.5 V Max. @ IF (Note 5) = 30 A) For Unidirectional
5. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, non−repetitive duty cycle.
Uni Directional TVS
V
I
Functional Diagram
Symbol Parameter
IPP Maximum Reverse Peak Pulse Current
VCClamping Voltage @ IPP
VRWM Working Peak Reverse Voltage
IRMaximum Reverse Leakage Current @ VRWM
VBR Breakdown Voltage @ IT
ITTest Current
IFMaximum Temperature Coefficient of VBR
VFForward Voltage @ IF
VF Forward Voltage @ IF
I-V Curve Characteristics (TA = 25°C unless otherwise noted) – For Bidirectional
I
PP
I
PP
I
R
I
T
I
T
I
R
V
RWM
V
C
V
BR
V
RWM
V
C
V
BR
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/13/17
TVS Diodes
Surface Mount > 600W > SZP6SMB Series
Electrical Characteristics - For Unidirectional
Breakdown Voltage VC @ IPP
(Note 8)
VBR
Device* Device
Marking
V
RWM
(Note 6)
IR @
VRWM
VBR @ IT (V) (Note 7) @ ITVCIPP
C Typ.
(Note 9)
Volts µA MIN NOM MAX mA Volts Amps %/°C pF
SZP6SMB6.8AT3G 6V8A 5.8 1000 6.45 6.8 7. 1 4 10 10.5 57 0.057 2380
SZP6SMB7.5AT3G 7V5A 6.4 500 7. 1 3 7.51 7.88 10 11. 3 53 0.061 2180
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 9.55 113.4 45 0.068 1835
SZP6SMB10AT3G 10A 8.55 10 9.5 10 10.5 114.5 41 0.073 1690
SZP6SMB12AT3G 12A 10.2 511. 4 12 12.6 116.7 36 0.078 1435
SZP6SMB13AT3G 13A 11. 1 512.4 13.05 13.7 118.2 33 0.081 1335
SZP6SMB15AT3G 15A 12.8 514.3 15.05 15.8 121.2 28 0.084 1175
SZP6SMB16AT3G 16A 13.6 515.2 16 16.8 122.5 27 0.086 1110
SZP6SMB18AT3G 18A 15.3 51 7. 1 18 18.9 125.2 24 0.088 1000
SZP6SMB20AT3G 20A 1 7. 1 519 20 21 127.7 22 0.09 910
SZP6SMB22AT3G 22A 18.8 520.9 22 23.1 130.6 20 0.092 835
SZP6SMB24AT3G 24A 20.5 522.8 24 25.2 133.2 18 0.094 775
SZP6SMB27AT3G 27A 23.1 525.7 27.05 28.4 137.5 16 0.096 700
SZP6SMB30AT3G 30A 25.6 528.5 30 31.5 141.4 14.4 0.097 635
SZP6SMB33AT3G 33A 28.2 531.4 33.05 34.7 145.7 13.2 0.098 585
SZP6SMB36AT3G 36A 30.8 534.2 36 37.8 149.9 12 0.099 540
SZP6SMB39AT3G 39A 33.3 537.1 39.05 41 153.9 11. 2 0.1 500
SZP6SMB43AT3G 43A 36.8 540.9 43.05 45.2 159.3 10.1 0.101 460
SZP6SMB47AT3G 47A 40.2 544.7 47.05 49.4 164.8 9.3 0.101 425
SZP6SMB51AT3G 51A 43.6 548.5 51.05 53.6 170.1 8.6 0.102 395
SZP6SMB56AT3G 56A 47.8 553.2 56 58.8 177 7. 8 0.103 365
SZP6SMB62AT3G 62A 53 558.9 62 65.1 185 7. 1 0.104 335
SZP6SMB68AT3G 68A 58.1 564.6 68 71.4 192 6.5 0.104 305
SZP6SMB75AT3G 75A 64.1 571.3 75.05 78.8 1103 5.8 0.105 280
SZP6SMB91AT3G 91A 77.8 586.5 91 95.5 1125 4.8 0.106 235
SZP6SMB100AT3G 100A 85.5 595 100 105 1137 4.4 0.106 215
SZP6SMB120AT3G 120A 102 5114 120 126 1165 3.6 0.107 185
SZP6SMB130AT3G 130A 111 5124 130.5 137 1179 3.3 0.107 170
SZP6SMB150AT3G 150A 128 5143 150.5 158 1207 2.9 0.108 150
SZP6SMB160AT3G 160A 136 5152 160 168 1219 2.7 0.108 140
SZP6SMB180AT3G 180A 154 5171 180 189 1246 2.4 0.108 130
SZP6SMB200AT3G 200A 171 5190 200 210 12 74 2.2 0.108 115
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. V BR 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.
9. Bias Voltage = 0 V, F = 1 MHz, TJ = 25°C
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/13/17
TVS Diodes
Surface Mount > 600W > SZP6SMB Series
Electrical Characteristics - For Bidirectional
Breakdown Voltage VC @ IPP
(Note 8)
VBR
Device* Device
Marking
V
RWM
(Note 6)
IR @
VRWM
VBR @ IT (V) (Note 7) @ ITVCIPP
C Typ.
(Note 9)
Volts µA MIN NOM MAX mA Volts Amps %/°C pF
SZP6SMB11CAT3G 11C 9.4 510.5 11.05 11. 6 115.6 38 0.075 865
SZP6SMB12CAT3G 12C 10.2 511. 4 12 12.6 116.7 36 0.078 800
SZP6SMB15CAT3G 15C 12.8 514.3 15.05 15.8 121.2 28 0.084 645
SZP6SMB16CAT3G 16C 13.6 515.2 16 16.8 122.5 27 0.086 610
SZP6SMB18CAT3G 18C 15.3 51 7. 1 18 18.9 125.2 24 0.088 545
SZP6SMB20CAT3G 20C 1 7. 1 519 20 21 127.7 22 0.09 490
SZP6SMB22CAT3G 22C 18.8 520.9 22 23.1 130.6 20 0.09 450
SZP6SMB24CAT3G 24C 20.5 522.8 24 25.2 133.2 18 0.094 415
SZP6SMB27CAT3G 27C 23.1 525.7 27.05 28.4 137.5 16 0.096 370
SZP6SMB30CAT3G 30C 25.6 528.5 30 31.5 141.4 14.4 0.097 335
SZP6SMB33CAT3G 33C 28.2 531.4 33.05 34.7 145.7 13.2 0.098 305
SZP6SMB36CAT3G 36C 30.8 534.2 36 37.8 149.9 12 0.099 280
SZP6SMB39CAT3G 39C 33.3 537.1 39.05 41 153.9 11. 2 0.1 260
SZP6SMB43CAT3G 43C 36.8 540.9 43.05 45.2 159.3 10.1 0.101 240
SZP6SMB47CAT3G 47C 40.2 544.7 47.05 49.4 164.8 9.3 0.101 220
SZP6SMB51CAT3G 51C 43.6 548.5 51.05 53.6 170.1 8.6 0.102 205
SZP6SMB56CAT3G 56C 47.8 553.2 56 58.8 177 7. 8 0.103 185
SZP6SMB62CAT3G 62C 53 558.9 62 65.1 185 7. 1 0.104 170
SZP6SMB68CAT3G 68C 58.1 564.6 68 71.4 192 6.5 0.104 155
SZP6SMB82CAT3G 82C 70.1 577.9 82 86.1 1113 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. V BR 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
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/13/17
TVS Diodes
Surface Mount > 600W > SZP6SMB Series
Figure 1. Pulse Rating Curve
Ratings and Characteristic Curves - For Unidirectional
Figure 2. Pulse Waveform
Figure 3 - Pulse Derating Curve Figure 4. Typical Junction Capacitance vs. Bias Voltage
Figure 5. Typical Protection Circuit
in
in
SZP6SMB6.8AT3G
SZP6SMB18AT3G
SZP6SMB51AT3G
SZP6SMB200AT3G
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/13/17
TVS Diodes
Surface Mount > 600W > SZP6SMB Series
Figure 6. Pulse Rating Curve
Ratings and Characteristic Curves - For Bidirectional
Figure 7. Pulse Waveform
Figure 8. Pulse Derating Curve Figure 9. Typical Junction Capacitance vs. Bias Voltage
Figure 10. Typical Protection Circuit
NONREPETITIVE
PULSE WAVEFORM
SHOWN IN FIGURE 2
t
1
10
100
0.1 s1 s1 0 s 100 s1 ms 10 ms
0.1 01 23 4
0
50
100
VALUE (%)
HALF VALUE - IPP
2
PEAK VALUE - IPP
t 10 s
tP
PULSE WIDTH (t
P) IS DEFINED AS
THAT POINT WHERE THE PEAK
CURRENT DECAYS TO 50% OF
IPP
.
5
PEAK PULSE DERATING IN % OF
PEAK POWER OR CURRENT @ TA= 25 C
100
80
60
40
20
002 55 07 51 00 125 150
120
140
160
in
in
°
°
≤
01011
10
100
1000
1
°
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/13/17
TVS Diodes
Surface Mount > 600W > SZP6SMB Series
Dimensions
Part Marking System
Soldering Footrpint
Physical Specifications
Case Void-free, transfer-molded, thermosetting
plastic
Polarity Cathode indicated by polarity band
Mounting Position Any
Finish All external surfaces are corrosion
resistant and leads are readily solderable
Leads Modified L−Bend providing more contact
area to bond pads
ORDERING INFORMATION
Device Package Shipping
SZP6SMBxxxAT3G SMB
(Pb−Free)
2,500 /
Tape & Reel
SZP6SMBxxxCAT3G SMB
(Pb−Free)
2,500 /
Tape & Reel
Flow/Wave Soldering (Solder Dipping)
Peak Temperature : 260OC
Dipping Time : 10 seconds
D
2.261
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. D DIMENSION SHALL BE MEASURED WITHIN DIMENSION P.
Dim
Inches Millimeters
Min Nom Max Min Nom Max
A0.077 0.091 0.097 1.95 2.30 2.47
A1 0.002 0.004 0.008 0.05 0.10 0.20
b0.077 0.080 0.087 1.96 2.03 2.20
c0.006 0.009 0.012 0.15 0.23 0.31
D0.130 0.140 0.156 3.30 3.56 3.95
E0.16 0 0.170 0.181 4.06 4.32 4.60
HE 0.205 0.214 0.220 5.21 5.44 5.60
L0.030 0.040 0.063 0.76 1.02 1.60
L1 0.020 REF 0.51 REF
E
bD
Lc
A
A1
POLARITY INDICATOR
OPTIONAL AS NEEDED
(SEE STYLES)
HE
D
Unidirectional Bidirectional
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.
