ST MICROELECTRONICS SM 15T39A STM Datasheet

Features

■ Peak pulse power:

– 1500 W (10/1000 µs)
– 10 kW (8/20 µs)

■ Breakdown voltage range: from 6.8 V to 220 V

■ Unidirectional and bidirectional types

■ Low leakage current:

– 0.2 µA at 25 °C
– 1 µA at 85 °C

■ Operating T

■ High power capability at T

– 1250 W (10/1000 µs)

■ JEDEC registered package outline

j max

: 150 °C

jmax

:

SM15T

Transil™

A

K

Unidirectional Bidirectional

SMC

(JEDEC DO-214AB)

Complies with the following standards

■ IEC 61000-4-2 level 4

– 15 kV (air discharge)
– 8 kV (contact discharge)

■ IEC 61000-4-5

– See Ta b le 3 for surge level

■ MIL STD 883G, method 3015-7: class 3B

– 25 kV HBM (human body model)

■ UL 497B file number: QVGQ2.E136224

■ Resin meets UL 94, V0

■ MIL-STD-750, method 2026 soldererabilty

■ EIA STD RS-481 and IEC 60286-3 packing

■ IPC 7531 footprint

Description

The SM15T Transil series has been designed to
protect sensitive equipment against electrostatic
discharges according to IEC 61000-4-2, and
MIL STD 883, method 3015, and electrical over
stress according to IEC 61000-4-4 and 5. These
devices are more generally used against surges
below 1500 W (10/1000 µs).

Planar technology makes these devices suitable
for high-end equipment and SMPS where low
leakage current and high junction temperature are
required to provide reliability and stability over
time.

SM15T are packaged in SMC (SMC footprint in
accordance with IPC 7531 standard).

TM: Transil is a trademark of STMicroelectronics

September 2009 Doc ID 3080 Rev 6 1/10

www.st.com

10

Characteristics SM15T

1 Characteristics

Table 1. Absolute maximum ratings (T

amb

= 25 °C)

Symbol Parameter Value Unit

P

T

T

Peak pulse power dissipation

PP

Storage temperature range -65 to + 150 °C

stg

Operating junction temperature range -55 to + 150 °C

T

j

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

L

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

Table 2. Thermal parameter

(1)

T

j initial

= T

amb

1500 W

Symbol Parameter Value Unit

R

R

th(j-l)

th(j-a)

Junction to leads 15 °C/W

Junction to ambient on printed circuit on recommended pad layout 90 °C/W

Figure 1. Electrical characteristics - definitions

I

I

I

I

PP

PP

I

I

R

R

I

I

RM

RM

RM

RM

I

I

VRMVBRV

VRMVBRV

RM

RM

I

I

R

R

Bidirectional

I

I

PP

PP

V

V

CL

CL

Symbol Parameter

V Stand-off voltage

RM

V Breakdown voltage

BR

V Clamping voltage

CL

I Leakage current @ V

RM RM

I Peak pulse current

PP

T Voltage temperature coefficient

α

V Forward voltage drop

F

R Dynamic resistance

D

Unidirectional

VCLVBRV

VCLVBRV

I

I

I

I

F

F

V

V

V

F

V

RM

RM

F

I

I

RM

RM

I

I

R

R

I

I

PP

PP

VCLVBRV

VCLVBRV

Figure 2. Pulse definition for electrical characteristics

%I

PP

100

50

0

t

t

r

p

2/10 Doc ID 3080 Rev 6

Pulse waveform
tr = rise time (µs)
tp = pulse duration time (µs)

t

SM15T Characteristics

Table 3. Electrical characteristics, parameter values (T

I

RM

max@V

RM

VBR @IR

(1)

VCL @IPP

10/1000 µs

amb

= 25 °C)

R

D

10/1000

µs

V

CL

@IPP

8/20 µs

R

D

8/20 µsαT

Order code

25 °C 85 °C min typ max max max max

µA V V mA V

(3)A(4)

Ω V

(3)A(4)

Ω 10-4/ °C

SM15T6V8A/CA 500 2000 5.8 6.45 6.8 7.14 10 10.5 143 0.023 13.4 746 0.008 5.7

SM15T7V5A/CA 250 1000 6.4 7.13 7.5 7.88 10 11.3 132 0.026 14.5 690 0.010 6.1

SM15T10A/CA 10 50 8.55 9.5 10 10.5 1 14.5 103 0.039 18.6 538 0.015 7.3

SM15T12A/CA 0.2 1 10.2 11.4 12 12.6 1 16.7 90 0.046 21.7 461 0.020 7.8

SM15T15A/CA 0.2 1 12.8 14.3 15 15.8 1 21.2 71 0.076 27.2 368 0.031 8.4

SM15T18A/CA 0.2 1 15.3 17.1 18 18.9 1 25.2 59.5 0.106 32.5 308 0.044 8.8

SM15T22A/CA 0.2 1 18.8 20.9 22 23.1 1 30.6 49 0.153 39.3 254 0.064 9.2

SM15T24A/CA 0.2 1 20.5 22.8 24 25.2 1 33.2 45 0.178 42.8 234 0.075 9.4

SM15T27A/CA 0.2 1 23.1 25.7 27 28.4 1 37.5 40 0.228 48.3 207 0.096 9.6

SM15T30A/CA 0.2 1 25.6 28.5 30 31.5 1 41.5 36 0.278 53.5 187 0.12 9.7

SM15T33A/CA 0.2 1 28.2 31.4 33 34.7 1 45.7 33 0.333 59.0 169 0.14 9.8

(2)

SM15T36A/CA 0.2 1 30.8 34.2 36 37.8 1 49.9 30 0.403 64.3 156 0.17 9.9

SM15T39A/CA 0.2 1 33.3 37.1 39 41.0 1 53.9 28 0.461 69.7 143 0.20 10.0

SM15T68A/CA 0.2 1 58.1 64.6 68 71.4 1 92 16.3 1.26 121 83 0.60 10.4

SM15T75A/CA 0.2 1 64.1 71.3 75 78.8 1 103 14.6 1.66 134 75 0.74 10.5

SM15T100A/CA 0.2 1 85.5 95.0 100 105 1 137 11 2.91 178 56 1.30 10.6

SM15T150A/CA 0.2 1 128 143 150 158 1 207 7.2 6.81 265 38 2.82 10.8

SM15T200A/CA 0.2 1 171 190 200 210 1 274 5.5 11.6 353 28 5.11 10.8

SM15T220A/CA 0.2 1 188 209 220 231 1 328 4.6 21.1 388 26 6.04 10.8

1. Pulse test : tp < 50 ms

2. To calculate V

3. To calculate maximum clamping voltage at other surge level, use the following formula: V

4. Surge capability given for both directions for unidirectional and bidirectional types.

versus junction temperature, use the following formula: V

BR

@ TJ = V

BR

@ 25°C x (1 + αT x (TJ – 25)).

BR

= RD x IPP + V

CL

BRmax.

Doc ID 3080 Rev 6 3/10