P6SMB43AT3 [ONSEMI]

P6SMB6.8AT3 Series

600 Watt Peak Power Zener

Transient Voltage Suppressors

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

ON Semiconductor’s exclusive, cost-effective, highly reliable

Surmetic™ 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.

Specification Features:

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PLASTIC SURFACE MOUNT

ZENER OVERVOLTAGE

TRANSIENT SUPPRESSORS

5.8–171 VOLTS

600 WATT PEAK POWER

Working Peak Reverse Voltage Range – 5.8 to 171 V

Standard Zener Breakdown Voltage Range – 6.8 to 200 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

µA

Above 10 V

UL 497B for Isolated Loop Circuit Protection

Response Time is Typically < 1 ns

Cathode

Anode

Mechanical Characteristics:

CASE:

Void-free, transfer-molded, thermosetting plastic

FINISH:

All external surfaces are corrosion resistant and leads are

SMB

CASE 403A

PLASTIC

readily solderable

MAXIMUM CASE TEMPERATURE FOR SOLDERING PURPOSES:

MARKING DIAGRAM

YWW

xxxA

Y

WW

xxxA

= Year

= Work Week

= Specific Device Code

=

(See Table on Page 3)

260°C for 10 Seconds

LEADS:

Modified L–Bend providing more contact area to bond pads

POLARITY:

Cathode indicated by polarity band

MOUNTING POSITION:

Any

MAXIMUM RATINGS

Please See the Table on the Following Page

ORDERING INFORMATION

*Please see P6SMB11CAT3 to P6SMB91CAT3 for Bidirectional devices.

Device

{

P6SMBxxxAT3

Package

SMB

Shipping

2500/Tape & Reel

Devices listed in

bold, italic

are ON Semiconductor

Preferred

devices.

Preferred

devices are recommended

choices for future use and best overall value.

†The “T3” suffix refers to a 13 inch reel.

©

Semiconductor Components Industries, LLC, 2001

1

May, 2001 – Rev. 5

Publication Order Number:

P6SMB6.8AT3/D

P6SMB6.8AT3 Series

MAXIMUM RATINGS

Rating

Peak Power Dissipation (Note 1.) @ T

L

= 25°C, Pulse Width = 1 ms

DC Power Dissipation @ T

L

= 75°C

Measured Zero Lead Length (Note 2.)

Derate Above 75°C

Thermal Resistance from Junction to Lead

DC Power Dissipation (Note 3.) @ T

A

= 25°C

Derate Above 25°C

Thermal Resistance from Junction to Ambient

Forward Surge Current (Note 4.) @ T

A

= 25°C

Operating and Storage Temperature Range

1.

2.

3.

4.

Symbol

P

PK

P

D

Value

600

3.0

40

25

0.55

4.4

226

100

–65 to +150

Unit

W

W

mW/°C

°C/W

W

mW/°C

°C/W

A

°C

R

qJL

P

D

R

qJA

I

FSM

T

J

, T

stg

10 X 1000

ms,

non–repetitive

1″ square copper pad, FR–4 board

FR–4 board, using ON Semiconductor minimum recommended footprint, as shown in 403A case outline dimensions spec.

1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per minute maximum.

ELECTRICAL CHARACTERISTICS

(T

A

= 25°C unless otherwise noted, V

F

= 3.5 V Max. @

I

F

(Note 4) = 30 A) (Note 5.)

Symbol

I

PP

V

C

V

RWM

I

R

V

BR

I

T

QV

BR

I

F

V

F

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 Coefficient of V

BR

Forward Current

Forward Voltage @ I

F

V

C

V

BR

V

RWM

I

F

I

I

R

V

F

I

T

V

I

PP

Uni–Directional TVS

5. 1/2 sine wave or equivalent, PW = 8.3 ms, non–repetitive

duty cycle

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2

P6SMB6.8AT3 Series

ELECTRICAL CHARACTERISTICS

(Devices listed in bold, italic are ON Semiconductor Preferred devices.)

V

RWM

(Note 6.)

Volts

Breakdown Voltage

I

R

@ V

RWM

µA

V

BR

Volts

(Note 7.)

Min

Nom

Max

@ I

T

mA

V

C

@ I

PP

(Note 8.)

V

C

Volts

I

PP

Amps

QV

BR

%/°C

Device

Device

Marking

P6SMB6.8AT3

P6SMB7.5AT3

P6SMB8.2AT3

P6SMB9.1AT3

P6SMB10AT3

P6SMB11AT3

P6SMB12AT3

P6SMB13AT3

P6SMB15AT3

P6SMB16AT3

P6SMB18AT3

P6SMB20AT3

P6SMB22AT3

P6SMB24AT3

P6SMB27AT3

P6SMB30AT3

P6SMB33AT3

P6SMB36AT3

P6SMB39AT3

P6SMB43AT3

P6SMB47AT3

P6SMB51AT3

P6SMB56AT3

P6SMB62AT3

P6SMB68AT3

P6SMB75AT3

P6SMB82AT3

P6SMB91AT3

P6SMB100AT3

P6SMB110AT3

P6SMB120AT3

P6SMB130AT3

P6SMB150AT3

P6SMB160AT3

P6SMB170AT3

P6SMB180AT3

P6SMB200AT3

6V8A

7V5A

8V2A

9V1A

10A

11A

12A

13A

15A

16A

18A

20A

5.8

6.4

7.02

7.78

8.55

9.4

10.2

11.1

12.8

13.6

15.3

17.1

1000

500

200

50

10

5

5

5

5

5

5

5

6.45

7.13

7.79

8.65

9.5

10.5

11.4

12.4

14.3

15.2

17.1

19

6.8

7.51

8.2

9.1

10

11.05

12

13.05

15.05

16

18

20

7.14

7.88

8.61

9.55

10.5

11.6

12.6

13.7

15.8

16.8

18.9

21

10

10

10

1

1

1

1

1

1

1

1

1

10.5

11.3

12.1

13.4

14.5

15.6

16.7

18.2

21.2

22.5

25.2

27.7

57

53

50

45

41

38

36

33

28

27

24

22

0.057

0.061

0.065

0.068

0.073

0.075

0.078

0.081

0.084

0.086

0.088

0.09

22A

24A

27A

30A

33A

36A

39A

43A

47A

51A

56A

62A

68A

75A

82A

91A

100A

110A

120A

130A

150A

160A

170A

180A

200A

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

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

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

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

180

200

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

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

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

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

4.0

3.6

3.3

2.9

2.7

2.6

2.4

2.2

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

6. A transient suppressor is normally selected according to the working peak reverse voltage (V

RWM

), which should be equal to or greater than

the DC or continuous peak operating voltage level.

7. V

BR

measured at pulse test current I

T

at an ambient temperature of 25°C.

8. Surge current waveform per Figure 2 and derate per Figure 3.

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3

P6SMB6.8AT3 Series

100

NONREPETITIVE

PULSE WAVEFORM

SHOWN IN FIGURE 2

10

t

r

≤

10

µs

100

VALUE (%)

PEAK VALUE - I

PP

I

PP

2

PULSE WIDTH (t

P

) IS DEFINED AS

THAT POINT WHERE THE PEAK

CURRENT DECAYS TO 50% OF I

PP

.

PP, PEAK POWER (kW)

HALF VALUE -

50

t

P

1

0.1

0.1

µs

1

µs

10

µs

100

µs

1 ms

10 ms

0

0

1

2

t, TIME (ms)

3

4

t

P

, PULSE WIDTH

Figure 1. Pulse Rating Curve

160

PEAK PULSE DERATING IN % OF

PEAK POWER OR CURRENT @ T = 25

°

C

A

140

120

100

80

60

40

20

0

0

25

50

75

100

125

150

V

in

Figure 2. Pulse Waveform

TYPICAL PROTECTION CIRCUIT

Z

in

LOAD

V

L

T

A

, AMBIENT TEMPERATURE (°C)

Figure 3. Pulse Derating Curve

C, CAPACITANCE (pF)

10,000

MEASURED @

ZERO BIAS

1000

MEASURED @ V

RWM

100

10

0.1

1

10

100

V

BR

, BREAKDOWN VOLTAGE (VOLTS)

1000

Figure 4. Capacitance versus Breakdown

Voltage

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4

P6SMB6.8AT3 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 capacitive

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 5.

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 6. Minimizing this overshoot is very important in the

application, since the main purpose for adding a transient

suppressor is to clamp voltage spikes. The SMB series have

a 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 7. 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 7 appear to be

in error as the 10 ms pulse has a higher derating factor than

the 10

µs

pulse. However, when the derating factor for a

given pulse of Figure 7 is multiplied by the peak power value

of Figure 1 for the same pulse, the results follow the

expected trend.

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