STMicroelectronics SMAJ Technical data

®

FEATURES

■ Peak Pulse Power : 400 W (10/1000µs)
■ Stand off voltage range:

From 5V to 188V

■ Uni and Bidirectional types
■ Low clamping factor
■ Fast response time
■ JEDEC registered package outline

TRANSIL™

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Unidirectional Bidirectional

SMAJ

DESCRIPTION

The SMAJ series are TRANSIL
signed specifically for protecting sensitive equip-

TM

diodes de-

SMA

(JEDEC DO-214AC)

ment against transient overvoltages. The SMA
package allows save spacing on high density
printed circuit boards.
Transil diodes provide high overvoltage protection
by clamping action. Their instantaneous response
to transient overvoltages makes them particularly
suited to protect voltage sensitive devices such as
MOS Technology and low voltage supplied IC’s.

Table 2: Absolute Maximum Rating (T

amb

= 25°C)

Table 1: Order Codes

Part Number Marking

SMAJxxxA-TR See page 2

SMAJxxxCA-TR See page 2

Symbol Parameter Value Unit

P

PP

Peak pulse power dissipation (see note 1)

P

Power dissipation on infinite heatsink

I

FSM

Non repetitive surge peak forward
current for unidirectional types

T

stg

Storage temperature range
Maximum junction temperature

T

j

T

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

Maximum lead temperature for soldering during 10 s.

L

initial = T

T

j

= 50°C

T

amb

t

= 10 ms

p

initial = T

T

j

amb

amb

400 W

3.3 W

40 A

-65 to 175
150

260

°C

°C

Table 3: Thermal Resistances

Symbol Parameter Value Unit

Rth(j-l) Junction to leads 30 °C/W

Rth(j-a) Junction to ambient on printed circuit on recommended pad layout 120 °C/W

February 2006

REV. 8

1/6

SMAJ

Table 4: Electrical Characteristics

(T

= 25°C)

amb

Symbol Parameter

V

V

Stand-off voltage

RM

Breakdown voltage

BR

I

I

I

I

I

F

F

I

I

I

PP

PP

V

I

I

Unidirectional Mark. Bidirectional Mark. µA V V mA V A V A

Clamping voltage

CL

Leakage current

RM

Peak pulse current

PP

αT Voltage temperature

coefficient

V

Forward voltage drop

F

Typ es

VCLVBRV

VCLVBRV

RM

RM

IRM @ VRMV

max min

I

I

R

V

V

F

F

I

I

RM

RM

I

I

R

R

Unidirectional Bidirectional

I

I

PP

PP

BR

V

V

VCLVBRV

VCLVBRV

@ IRVCL @ IPPV

max

note2

10/1000µs

RM

RM

CL

max

8/20µs

R

I

I

RM

RM

I

I

RM

RM

I

I

R

R

I

I

PP

PP

@ I

PP

VRMVBRV

VRMVBRV

αT

max

note3

-4

/°C

10

V

V

CL

CL

note4

C

typ

pF

SMAJ5.0A-TR AE SMAJ5.0CA-TR AA 800 5.0 6.4 10 9.2 43.5 13.4 174 5.7 3500
SMAJ6.0A-TR DUB SMAJ6.0CA-TR DBB 800 6.0 6.7 10 10.3 38.8 13.7 170 5.9 3300
SMAJ6.5A-TR DUC SMAJ6.5CA-TR DBC 500 6.5 7.2 10 11.2 35.7 14.5 160 6.1 3100
SMAJ8.5A-TR DUH SMAJ8.5CA-TR DBH 10 8.5 9.44 1 14.4 27.7 18.6 124 7.3 2000
SMAJ10A-TR AX SMAJ10CA-TR AC 5 10 11.1 1 17 23.5 21.7 106 7.8 1550
SMAJ12A-TR DUK SMAJ12CA-TR DBK 5 12 13.3 1 19.9 20.1 25.3 91 8.3 1325
SMAJ13A-TR BG SMAJ13CA-TR BH 1 13 14.4 1 21.5 18.6 27.2 85 8.4 1200
SMAJ15A-TR BM SMAJ15CA-TR AJ 1 15 16.7 1 24.4 16.4 32.5 71 8.8 975
SMAJ18A-TR DUQ SMAJ18CA-TR DBQ 1 18 20 1 29.2 13.7 39.3 59 9.2 800
SMAJ20A-TR DUR SMAJ20CA-TR DBR 1 20 22.2 1 32.4 12.3 42.8 54 9.4 725
SMAJ22A-TR DUS SMAJ22CA-TR DBS 1 22 24.4 1 35.5 11.2 48.3 48 9.6 625
SMAJ24A-TR DUT SMAJ24CA-TR DBT 1 24 26.7 1 38.9 10.3 50 46 9.6 600
SMAJ26A-TR DUU SMAJ26CA-TR DBU 1 26 28.9 1 42.1 9.5 53.5 43 9.7 575
SMAJ28A-TR CG SMAJ28CA-TR CH 1 28 31.1 1 45.4 8.8 59 39 9.8 510
SMAJ30A-TR CK SMAJ30CA-TR CL 1 30 33.3 1 48.4 8.3 64.3 36 9.9 480
SMAJ33A-TR CM SMAJ33CA-TR CN 1 33 36.7 1 53.3 7.5 69.7 33 10.0 450
SMAJ40A-TR DUZ SMAJ40CA-TR DBZ 1 40 44.4 1 64.5 6.2 84 27 10.1 370
SMAJ43A-TR EUA SMAJ43CA-TR EBA 1 43 47.8 1 69.4 5.7 91 25 10.2 350
SMAJ48A-TR CX SMAJ48CA-TR CY 1 48 53.3 1 77.4 5.2 100 23 10.3 320
SMAJ58A-TR EUF SMAJ58CA-TR EBF 1 58 64.4 1 93.6 4.3 121 19 10.4 270
SMAJ70A-TR EUI SMAJ70CA-TR EBI 1 70 77.8 1 113 3.5 146 16 10.5 230
SMAJ85A-TR EUL SMAJ85CA-TR EBL 1 85 94.4 1 137 2.9 178 13 10.6 200
SMAJ100A-TR EUN SMAJ100CA-TR EBN 1 100 111 1 162 2.5 212 11 10.7 170
SMAJ130A-TR EUQ SMAJ130CA-TR EBQ 1 130 144 1 209 1.9 265 9 10.8 145
SMAJ154A-TR EUT SMAJ154CA-TR EBT 1 154 171 1 246 1.6 317 7 10.8 125
SMAJ170A-TR SR SMAJ170CA-TR SS 1 170 189 1 275 1.4 353 6.5 10.8 120
SMAJ188A-TR EUV SMAJ188CA-TR EBV 1 188 209 1 328 1.4 388 6 10.8 110

Note 2: Pulse test : tp < 50 ms.

∆V

Note 3:
Note 4: V

= αT * (T

BR

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

R

- 25) * VBR(25°C).

amb

2/6