Revision: November 17, 2011, 16:25

©2011 Littelfuse, Inc.

Specifications are subject to change without notice.

Transient Voltage Suppression Diodes

1

SMAJ Series

Surface Mount – 400W > SMAJ series

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

SMAJ Series

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.

• Halogen-Free

• RoHS compliant

• For surface mounted

applications to optimize

board space

• Low profile package

• Built-in strain relief

• Glass passivated junction

• Low inductance

• Excellent clamping

capability

• 400W Peak Pulsepower

capability at 10 x 1000µs

waveform, repetition rate

(duty cycle): 0.01%

• Fast response time:

typically less than 1.0ps

from 0 Volts to V

• Typical I

above 12V

• High temperature

soldering: 260°C/40

seconds at terminals

• Typical maximum

temperature coefficient

ΔV

• Plastic package has

Underwriters Laboratory

Flammability 94V-O

• Matte Tin Lead–free

Plated

RoHS

Pb