1SMB5.0AT3 - 600 Watt Peak Power Zener Transient Voltage .../media/electronics/datasheets/tvs_diodes/... · 1 Publication Order Number: 1SMB5.0AT3/D 1SMB5.0AT3G Series, SZ1SMB5.0AT3G

1 Publication Order Number:1SMB5.0AT3/D

1SMB5.0AT3G Series,SZ1SMB5.0AT3G Series

600 Watt Peak Power ZenerTransient VoltageSuppressors

Unidirectional

The SMB 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 SMB series is supplied in the Littelfuse exclusive, cost-effective, highly reliable package and is ideal ly sui ted for use in communication systems, automotive, numerical controls, process controls, medical equipment, business machines, power supplies and many other industrial/consumer applications.

Features

Working Peak Reverse Voltage Range − 5.0 V to 170 V

Standard Zener Breakdown Voltage Range − 6.7 V to 199 V

Peak Power − 600 W @ 1.0 ms

ESD Rating of Class 3 (> 16 kV) per Human Body Model

Maximum Clamp Voltage @ Peak Pulse Current

Low Leakage < 5.0 �A Above 10 V

UL 497B for Isolated Loop Circuit Protection

Response Time is Typically < 1.0 ns

SZ Prefix for Automotive and Other Applications Requiring UniqueSite and Control Change Requirements; AEC−Q101 Qualified andPPAP Capable

Pb−Free Packages are Available

Mechanical CharacteristicsCASE: Void-free, transfer-molded, thermosetting plasticFINISH: All external surfaces are corrosion resistant and leads are

readily solderableMAXIMUM CASE TEMPERATURE FOR SOLDERING PURPOSES:

260C for 10 SecondsLEADS: Modified L−Bend providing more contact area to bond padsPOLARITY: Cathode indicated by polarity bandMOUNTING POSITION: Any

PLASTIC SURFACE MOUNTZENER OVERVOLTAGE

TRANSIENT SUPPRESSORS5.0 V − 170 V,

600 W PEAK POWER

Device Package Shipping

ORDERING INFORMATION

SMBCASE 403A

PLASTIC

Cathode Anode

Littelfuse.com

1SMBxxxAT3G SMB(Pb−Free)

2,500 / Tape & Reel

See specific marking information in the device markingcolumn of the Electrical Characteristics table on page 3 ofthis data sheet.

DEVICE MARKING INFORMATION

A = Assembly LocationY = YearWW = Work Weekxx = Device Code (Refer to page 3)� = Pb−Free Package

MARKING DIAGRAM

AYWWxx �

�

(Note: Microdot may be in either location)

SZ1SMBxxxAT3G SMB(Pb−Free)

2,500 / Tape & Reel

Specifications subject to change without notice. © 2016 Littelfuse, Inc.September 19, 2016 − Rev. 13

jchen4

Text Box

OBSOLETE/EOL DATE June/30/2018 PCN/ECN# LFPCN41246 REPLACED BY SMBJ Series

Uni−Directional TVS

IPP

IF

V

I

IRIT

VRWMVC VBRVF

1SMB5.0AT3G Series, SZ1SMB5.0AT3G Series

MAXIMUM RATINGS

Rating Symbol Value Unit

Peak Power Dissipation (Note 1) @ TL = 25C, Pulse Width = 1 ms PPK 600 W

DC Power Dissipation @ TL = 75C Measured Zero Lead Length (Note 2)Derate Above 75C

Thermal Resistance from Junction−to−Lead

PD

R�JL

3.04025

WmW/CC/W

DC Power Dissipation (Note 3) @ TA = 25CDerate Above 25C

Thermal Resistance from Junction−to−Ambient

PD

R�JA

0.554.4226

WmW/CC/W

Forward Surge Current (Note 4) @ TA = 25C IFSM 100 A

Operating and Storage Temperature Range TJ, Tstg −65 to +150 C

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above theRecommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affectdevice reliability.1. 10 X 1000 �s, non−repetitive.2. 1 in square copper pad, FR−4 board.3. FR−4 board, using minimum recommended footprint, as shown in 403A case outline dimensions spec.4. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per minute maximum.

ELECTRICAL CHARACTERISTICS (TA = 25C unlessotherwise noted, VF = 3.5 V Max. @ IF (Note 5) = 30 A)

Symbol 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

IF Forward Current

VF Forward Voltage @ IF5. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms,

non−repetitive duty cycle.




ELECTRICAL CHARACTERISTICS

Device*Device

Marking

VRWM(Note 6) IR @ VRWM

Breakdown Voltage VC @ IPP (Note 8)Ctyp

(Note 9)VBR (Note 7) Volts @ IT VC IPP

V �A Min Nom Max mA V A pF

1SMB5.0AT3G1SMB6.0AT3G1SMB6.5AT3G1SMB7.0AT3G

KEKGKKKM

5.06.06.57.0

800800500500

6.406.677.227.78

6.77.027.68.19

7.07.377.988.6

10101010

9.210.311.212.0

65.258.353.650.0

2700230021402005

1SMB7.5AT3G1SMB8.0AT3G1SMB8.5AT3G1SMB9.0AT3G

KPKRKTKV

7.58.08.59.0

10050105.0

8.338.899.4410.0

8.779.369.9210.55

9.219.8310.411.1

1.01.01.01.0

12.913.614.415.4

46.544.141.739.0

1890178016901605

1SMB10AT3G1SMB11AT3G1SMB12AT3G1SMB13AT3G

KXKZLELG

10111213

5.05.05.05.0

11.112.213.314.4

11.712.85

1415.15

12.313.514.715.9

1.01.01.01.0

17.018.219.921.5

35.333.030.227.9

1460134512451160


LKLMLPLR

14151617

5.05.05.05.0

15.616.717.818.9

16.417.618.7519.9

17.218.519.720.9

1.01.01.01.0

23.224.426.027.6

25.824.023.121.7

10851020965915


LTLVLXLZ

18202224

5.05.05.05.0

20.022.224.426.7

21.0523.3525.6528.1

22.124.526.929.5

1.01.01.01.0

29.232.435.538.9

20.518.516.915.4

870790730675


MEMGMKMM

26283033

5.05.05.05.0

28.931.133.336.7

30.432.7535.0538.65

31.934.436.840.6

1.01.01.01.0

42.145.448.453.3

14.213.212.411.3

630590555510


MPMRMTMV

36404345

5.05.05.05.0

40.044.447.850.0

42.146.7550.352.65

44.249.152.855.3

1.01.01.01.0

58.164.569.472.7

10.39.38.68.3

470430400385


MXMZNENG

48515458

5.05.05.05.0

53.356.760.064.4

56.159.763.1567.8

58.962.766.371.2

1.01.01.01.0

77.482.487.193.6

7.77.36.96.4

365345330310


NKNMNPNR

60647075

5.05.05.05.0

66.771.177.883.3

70.274.8581.987.7

73.778.686

92.1

1.01.01.01.0

96.8103113121

6.25.85.34.9

300280260245

1SMB85AT3G1SMB90AT3G1SMB100AT3G

NVNXNZ

8590100

55.05.05.0

94.4100111

99.2105.5117

104111123

1.01.01.0

137146162

4.44.13.7

220210190


PEPGPKPM

110120130150

5.05.05.05.0

122133144167

128.5140

151.5176

135147159185

1.01.01.01.0

177193209243

3.43.12.92.5

175160150135

1SMB160AT3G1SMB170AT3G

PPPR

160170

5.05.0

178189

187.5199

197209

1.01.0

259275

2.32.2

125120

6. A transient suppressor is normally selected according to the working peak reverse voltage (VRWM), which should be equal to or greater thanthe DC or continuous peak operating voltage level.

7. VBR measured at pulse test current IT at an ambient temperature of 25C.8. Surge current waveform per Figure 2 and derate per Figure 4 of the General Data − 600 W at the beginning of this group.9. Bias Voltage = 0 V, F = 1 MHz, TJ = 25C†Please see 1SMB10CAT3 to 1SMB78CAT3 for Bidirectional devices.* Include SZ-prefix devices where applicable.




1SMB5.0AT3G

1SMB10AT3G

1SMB48AT3G

1SMB170AT3G

NONREPETITIVEPULSE WAVEFORMSHOWN IN FIGURE 2

tP, PULSE WIDTH

1

10

100

0.1 �s 1 �s 10 �s 100 �s 1 ms 10 ms0.1

Figure 1. Pulse Rating Curve

0 1 2 3 40

50

100

t, TIME (ms)

VALU

E (%

)

HALF VALUE - IPP2

PEAK VALUE - IPP

tr� 10 �s

Figure 2. Pulse Waveform

Figure 3. Pulse Derating Curve

Vin VL

Zin

LOAD

Figure 4. Typical Junction Capacitance vs. Bias Voltage

PEAK

PU

LSE

DER

ATIN

G IN

% O

FPE

AK P

OW

ER O

R C

UR

REN

T @

T A=

25C

100

80

60

40

20

00 25 50 75 100 125 150

TA, AMBIENT TEMPERATURE (C)

120

140

160

tP

PULSE WIDTH (tP) IS DEFINED ASTHAT POINT WHERE THE PEAKCURRENT DECAYS TO 50% OFIPP.

BIAS VOLTAGE (VOLTS)

Figure 5. Typical Protection Circuit

1 10 100 1000

10

100

1000

10,000

C, C

APA

CIT

AN

CE

(pF)

PP

K, P

EA

K P

OW

ER

(kW

)

1

TJ = 25Cf = 1 MHz

5




APPLICATION NOTES

Response TimeIn most applications, the transient suppressor device is

placed in parallel with the equipment or component to beprotected. In this situation, there is a time delay associatedwith the capacitance of the device and an overshootcondition associated with the inductance of the device andthe inductance of the connection method. The capacitiveeffect is of minor importance in the parallel protectionscheme because it only produces a time delay in thetransition from the operating voltage to the clamp voltage asshown in Figure 6.

The inductive effects in the device are due to actualturn-on time (time required for the device to go from zerocurrent to full current) and lead inductance. This inductiveeffect produces an overshoot in the voltage across theequipment or component being protected as shown inFigure 7. Minimizing this overshoot is very important in theapplication, since the main purpose for adding a transientsuppressor is to clamp voltage spikes. The SMB series havea very good response time, typically < 1.0 ns and negligibleinductance. However, external inductive effects couldproduce unacceptable overshoot. Proper circuit layout,

minimum lead lengths and placing the suppressor device asclose as possible to the equipment or components to beprotected will minimize this overshoot.

Some input impedance represented by Zin is essential toprevent overstress of the protection device. This impedanceshould be as high as possible, without restricting the circuitoperation.

Duty Cycle DeratingThe data of Figure 1 applies for non-repetitive conditions

and at a lead temperature of 25C. If the duty cycle increases,the peak power must be reduced as indicated by the curvesof Figure 8. Average power must be derated as the lead orambient temperature rises above 25C. The average powerderating curve normally given on data sheets may benormalized and used for this purpose.

At first glance the derating curves of Figure 8 appear to bein error as the 10 ms pulse has a higher derating factor thanthe 10 �s pulse. However, when the derating factor for agiven pulse of Figure 8 is multiplied by the peak powervalue of Figure 1 for the same pulse, the results follow theexpected trend.

VL

V

Vin

Vin (TRANSIENT)VL

td

V

Vin (TRANSIENT)OVERSHOOT DUE TOINDUCTIVE EFFECTS

tD = TIME DELAY DUE TO CAPACITIVE EFFECTt t

Figure 6. Figure 7.

Figure 8. Typical Derating Factor for Duty Cycle

DE

RAT

ING

FA

CTO

R

1 ms

10 �s

10.70.5

0.3

0.05

0.1

0.2

0.01

0.020.03

0.07

100 �s

0.1 0.2 0.5 2 5 10 501 20 100D, DUTY CYCLE (%)

PULSE WIDTH10 ms




UL RECOGNITION

The entire series has Underwriters LaboratoryRecognition for the classification of protectors (QVGQ2)under the UL standard for safety 497B and File .Many competitors only have one or two devices recognizedor have recognition in a non-protective category. Somecompetitors have no recognition at all. With the UL497Brecognition, our parts successfully passed several tests

including Strike Voltage Breakdown test, EnduranceConditioning, Temperature test, DielectricVoltage-Withstand test, Discharge test and several more.

Whereas, some competitors have only passed aflammability test for the package material, we have beenrecognized for much more to be included in their Protectorcategory.



#E128662


PACKAGE DIMENSIONS

SMBCASE 403A−03

ISSUE H

E

b D

cL1L

A

A1

NOTES:1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.2. CONTROLLING DIMENSION: INCH.3. D DIMENSION SHALL BE MEASURED WITHIN DIMENSION P.

2.2610.089

2.7430.108

2.1590.085 � mm

inches�SCALE 8:1

SOLDERING FOOTPRINT

DIMA

MIN NOM MAX MINMILLIMETERS

1.90 2.20 2.28 0.075

INCHES

A1 0.05 0.10 0.19 0.002b 1.96 2.03 2.20 0.077c 0.15 0.23 0.31 0.006D 3.30 3.56 3.95 0.130E 4.06 4.32 4.60 0.160

L 0.76 1.02 1.60 0.030

0.087 0.0900.004 0.0070.080 0.0870.009 0.0120.140 0.1560.170 0.181

0.040 0.063

NOM MAX

5.21 5.44 5.60 0.205 0.214 0.220HE

0.51 REF 0.020 REF

D

L1

HE

POLARITY INDICATOROPTIONAL AS NEEDED



Littelfuse.com

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 shall not be used for, any purpose (including, without limitation, 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.

Denice

Sticky Note

Marked set by Denice

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1SMB5.0AT3 - 600 Watt Peak Power Zener Transient Voltage .../media/electronics/datasheets/tvs_diodes/... · 1 Publication Order Number: 1SMB5.0AT3/D 1SMB5.0AT3G Series, SZ1SMB5.0AT3G