ST MICROELECTRONICS SM6T 36A STM Datasheet

Features

■ Peak Pulse Power: 600 W (10/1000 µs)

■ Breakdown voltage range:

From 6.8 V to 220 V

■ Uni and Bidirectional types

■ Low clamping factor

■ Fast response time

■ UL recognized

Description

A

K

Unidirectional

SM6T

Transil™

Bidirectional

The SM6T Transil series has been designed to
protect sensitive equipment against electrostatic
discharges according to IEC 61000-4-2, MIL STD
883E Method 3015, and electrical over stress
such as IEC 61000-4-4 and 5. They are, more
generally, suitable for surges below 600 W,
10/1000 µs

This planar technology makes the SM6T
compatible with high-end equipment and SMPS
where low leakage current and high junction
temperature are required to provide reliability and
stability over time.

Automotive grade versions are available (see

Section 4: Ordering information).

SMB

(JEDEC DO-214AA)

TM: Transil is a trademark of STMicroelectronics

March 2008 Rev 6 1/9

www.st.com

9

Characteristics SM6T

1 Characteristics

Table 1. Absolute maximum ratings

Symbol Parameter Value Unit

P

PP

Peak pulse power dissipation

P Power dissipation on infinite heatsink T

I

FSM

T

stg

T

T

1. For a surge greater than the maximum values, the diode will fail in short-circuit.

Table 2. Thermal resistance

Non repetitive surge peak forward
current for unidirectional types

Storage temperature range
Operating junction temperature range

j

Maximum lead temperature for soldering during 10 s. 260 °C

L

Symbol Parameter Value Unit

R

th(j-l)

R

th(j-a)

Table 3. Electrical characteristics (T

Junction to leads 20 °C/W

Junction to ambient on printed circuit on recommended
pad layout

Symbol Parameter

V

RM

V

V

I

RM

I

PP

Stand-off voltage

Breakdown voltage

BR

Clamping voltage

CL

Leakage current

Peak pulse current

αT Voltage temperature coefficient

V

Forward voltage drop

F

(1)

amb

Tj initial = T

amb

= 10 ms

t

p

initial = T

T

j

= 25 °C)

amb

600 W

= 50 °C 5 °C

amb

100 °C

-65 to 175

-55 to 150

°C

100 °C/W

I

I

F

VVCLV

BR

V

RM

V

F

I

RM

I

PP

V

Figure 1. Pulse definition for electrical characterisitcs

t

2/9

Repetitive pulse current
tr= rise time (µs)
tp= pulse duration time (µs)

t

p

r

SM6T Characteristics

Table 4. Electrical characteristics, parameter values (T

Order code

I

max min nom max max max max typ

µA

(Tj=25°C)µA(Tj=85°C)

RM

@ V

RM

= 25 °C)

amb

V

(1)

VBR @ I

@ I

(2)

R

CL

10/1000 µs

PP

(3)

V

@ I

CL

8/20 µs

VVV VmAV A V A10

PP

(3)

(4)

αT

-4

/°C pF

SM6T6V8A/CA 10 50 5.8 6.45 6.8 7.14 10 10.5 57 13.4 298 5.7 4000

SM6T7V5A/CA 10 50 6.4 7.13 7.5 7.88 10 11.3 53 14.5 276 6.1 3700

SM6T10A/CA 1 10 8.55 9.5 10 10.5 1 14.5 41 18.6 215 7.3 2800

SM6T12A/CA 0.5 1 10.2 11.4 12 12.6 1 16.7 36 21.7 184 7.8 2300

SM6T15A/CA 0.5 1 12.8 14.3 15 15.8 1 21.2 28 27.2 147 8.4 1900

SM6T18A/CA 0.5 1 15.3 17.1 18 18.9 1 25.2 24 32.5 123 8.8 1600

SM6T22A/CA 0.5 1 18.8 20.9 22 23.1 1 30.6 20 39.3 102 9.2 1350

SM6T24A/CA 0.5 1 20.5 22.8 24 25.2 1 33.2 18 42.8 93 9.4 1250

SM6T27A/CA 0.5 1 23.1 25.7 27 28.4 1 37.5 16 48.3 83 9.6 1150

SM6T27AY

(6)

0.5 1 23.1 25.7 27 28.4 1 37.5 16 48.3 83 9.6 1150

SM6T30A/CA 0.5 1 25.6 28.5 30 31.5 1 41.5 14.5 53.5 75 9.7 1075

SM6T33A/CA 0.5 1 28.2 31.4 33 34.7 1 45.7 13.1 59.0 68 9.8 1000

(5)

C

SM6T36A/CA 0.5 1 30.8 34.2 36 37.8 1 49.9 12 64.3 62 9.9 950

SM6T36AY

(6)

0.5 1 30.8 34.2 36 37.8 1 49.9 12 64.3 62 9.9 950

SM6T39A/CA 0.5 1 33.3 37.1 39 41.0 1 53.9 11.1 69.7 57 10.0 900

SM6T39AY

(6)

0.5 1 33.3 37.1 39 41.0 1 53.9 11.1 69.7 57 10.0 900

SM6T68A/CA 0.5 1 58.1 64.6 68 71.4 1 92 6.5 121 33 10.4 625

SM6T75A/CA 0.5 1 64.1 71.3 75 78.8 1 103 5.8 134 30 10.5 575

SM6T100A/CA 0.5 1 85.5 95.0 100 105 1 137 4.4 178 22.5 10.6 500

SM6T150A/CA 0.5 1 128 143 150 158 1 207 2.9 265 15 10.8 400

SM6T200A/CA 0.5 1 171 190 200 210 1 274 2.2 353 11.3 10.8 350

SM6T220A/CA 0.5 1 188 209 220 231 1 328 2 388 10.3 10.8 330

1. For bidirectional types having VRM ≤ 10 V, IRM shown should be multiplied by 2.

2. Pulse test: t

3. For pulse definition see Figure 1.

4. ΔV

BR

= 0 V, F = 1 MHz. For bidirectional types, capacitance value shown should be divided by 2.

5. V

R

6. Automotive grade version (qualified according to AEC Q101)

< 50 ms

p

= αT * (T

- 25) * VBR(25 °C)

amb

3/9

Characteristics SM6T

Figure 2. Peak power dissipation versus

Figure 3. Peak pulse power versus
initial junction temperature (printed
circuit board)

%

100

80

60

40

20

Tj initial (° C)

0

0

20

40 60 80 100 120 140 160 180 200

Figure 4. Clamping voltage versus peak pulse current

exponential pulse duration

(a)

Exponential waveform:

a. The curves of Figure 4 are specified for a junction temperature of 25 °C before surge. The given results may be

extrapolated for other junction temperatures by using the formula: ΔV
voltages, extrapolate the given results.

t = 20µs

p

t = 1ms

p

t = 10ms

p

= αT * [T

BR

-25] * VBR(25 °C). For intermediate

amb

4/9

SM6T Characteristics

Figure 5. Capacitance versus reverse

applied voltage for unidirectional
types (typical values)

C (pF)

10000

S

M

6

T

6

V

8

M

M
M

M6

A

6

T

1

5

A

6

T

3

0

A

T

6

8

A

6

T

2

2

0

A

1000

S
S

S

S

100

10

110100

Tj

= 25° C

F= 1 MHz

V(V)

R

500

Figure 7. Peak forward voltage drop versus

peak forward current for
unidirectional types (typical values)

Figure 6. Capacitance versus reverse applied

voltage for bidirectional types
(typical values)

C (pF)

10000

S

M6

T

6

V

8

C

S

M

1000

S

M

S

M

S

M

100

10

110100

A

6

T

1

5

C

A

6

T

3

0

C

A

6

T

6

8

C

A

6

T

2

2

0

C

A

Tj = 25° C
F= 1 MHz

V(V)

R

500

Figure 8. Transient thermal resistance

junction to ambient versus pulse
duration (printed circuit board FR4
e

= 35 µm)

(Cu)

Zth (j-a) (°C/W)

100

10

1

0.01 0.1 1 10 100 1000

Figure 9. Relative variation of leakage current versus junction temperature

T (° C)

j

tp

s

5/9

Order information scheme SM6T

2 Order information scheme

Figure 10. Order information scheme

SM 6T 100 CAY

Surface Mount

Peak Pulse Power

6T = 600 W Transil

Breakdown Voltage

100 = 100 V

Types

CA = Bidirectional

A = Unidirectional

Y = Automotive grade

3 Packaging information

● Epoxy meets UL94, V0

In order to meet environmental requirements, ST offers these devices in ECOPACK

®

packages. These packages have a lead-free second level interconnect. The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at www.st.com.

Table 5. SMB package dimensions

Dimensions

E1

D

E

A1

C

L

A2

b

Ref.

Millimeters Inches

Min. Max. Min. Max.

A1 1.90 2.45 0.075 0.096

A2 0.05 0.20 0.002 0.008

b 1.95 2.20 0.077 0.087

c 0.15 0.40 0.006 0.016

D 3.30 3.95 0.130 0.156

E 5.10 5.60 0.201 0.220

E1 4.05 4.60 0.159 0.181

6/9

L 0.75 1.50 0.030 0.059

SM6T Packaging information

Figure 11. SMB footprint

Figure 12. Marking layout

dimensions in mm
(inches)

1.62

(0.064) (0.102)

Table 6 . M arki n g

2.60

5.84

(0.300)

1.62

(0.064)

2.18

(0.086)

x x x
z

Order code Mark Order code Mark

SM6T6V8A DE SM6T6V8CA LE

SM6T7V5A DG SM6T7V5CA LG

SM6T10A DP SM6T10CA LP

SM6T12A DT SM6T12CA LT

SM6T15A DX SM6T15CA LX

SM6T18A EE SM6T18CA ME

SM6T22A EK SM6T22CA MK

SM6T24A EM SM6T24CA MM

SM6T27A EP SM6T27CA MP

SM6T27AY

(1)

EPY

SM6T30A ER SM6T30CA MR

SM6T33A ET SM6T33CA MT

SM6T36A EV SM6T36CA MV

SM6T36AY

(1)

EVY

SM6T39A EX SM6T39CA MX

SM6T39AY

(1)

EXY

SM6T68A FQ SM6T68CA NQ

SM6T75A FS SM6T75CA NS

SM6T100A FY SM6T100CA NY

SM6T150A GL SM6T150CA OL

SM6T200A GU SM6T200CA OU

SM6T220A GW SM6T220CA OW

1. Automotive grade version (qualified according to AEC Q101)

Cathode bar (unidirectional devices onl y )

e3

e3: ECOPACK ( Lead-free
XXX : Marking
Z : Manufacturing location
Y : Year
WW : week

y w w

7/9

Ordering information SM6T

4 Ordering information

Table 7. Ordering information

Order code Marking Package Weight Base qty Delivery mode

SM6T See Table 6 on page 7 SMB 0.12 g 5000 Tape and reel

5 Revision history

Table 8. Document revision history

Date Revision Changes

August-2001 4A Previous update.

15-Sep-2004 5

26-Mar-2008 6

1. Types table parameters on page 2: IRM @ Tj = 85 °C condition added

2. IRM max values changed

Reformatted to current standard. SMB dimensions and footprint updated.
Maximum junction temperature replaced with operating junction
temperature range in Ta bl e 1 . Automotive grade versions indicated in

Description section, in Ta b l e 4 and Ta bl e 6 .

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SM6T

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