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©2009 Littelfuse, Inc.

Specifications are subject to change without notice.

Transient Voltage Suppression Diodes

Revision: January 09, 2009

Surface Mount – 400W > SMAJ series

SMAJ Series

Please refer to http://www.Littelfuse.com/series/SMAJ.html for current information.

SMAJ Series

RoHS

Description

Agency Approvals

AGENCY

AGENCY FILE NUMBER

E230531

Features

Maximum Ratings and Thermal Characteristics

(T

O

C unless otherwise noted)

Parameter

Symbol

Value

Unit

Peak Pulse Power Dissipation at

T

(Fig.1)(Note 1), (Note 2)

P

PPM

400

W

Power Dissipation on infinite heat

sink at T

O

C

P

M(AV)

3.3

W

Peak Forward Surge Current, 8.3ms

Single Half Sine Wave (Note 3)

I

FSM

40

A

Maximum Instantaneous Forward

Voltage at 25A for Unidirectional

only (Note 4)

V

F

3.5V/6.5

V

Operating Junction and Storage

Temperature Range

T

-65 to 150

°C

Typical Thermal Resistance Junction

to Lead

R

uJL

30

°C/W

Typical Thermal Resistance Junction

to Ambient

R

uJA

120

°C/W

Notes:

1. Non-repetitive current pulse, per Fig.3 and derated above T

2. Mounted on 5.0x5.0mm copper pad to each terminal.

3. Measured on 8.3ms single half sine wave or equivalent square wave for unidirectional

device only.

4. V

<

200V and V

>

201V.

The SMAJ series is designed specifically to protect

sensitive electronic equipment from voltage transients

induced by lightning and other transient voltage events.

Applications

TVS devices are ideal for the protection of I/O Interfaces,

V

Computer, Industrial and Consumer electronic applications.

applications to optimize

board space

capability

capability at 10 x 1000μs

waveform, repetition rate

(duty cycle): 0.01%

typically less than 1.0ps

from 0 Volts to V

above 12V

soldering: 260°C/40

seconds at terminals

temperature coefficient

ΔV

Underwriters Laboratory

Flammability 94V-O

Plated