1

MOTOROLA

1SMA5.0AT3 through 1SMA78AT3

Zener Transient Voltage

Suppressors

Specification Features:

• Reverse Stand–Off Voltage Range: 5.0–78 V

• Peak Power — 400 Watts @ 1.0 ms

• ESD Rating of Class 3 (>16 kV) per Human Body Model

• Pico Seconds Response Time (0 V to BV)

• Flat Handling Surface for Accurate Placement

• Package Design for Top Side or Bottom Circuit Board Mounting

• Available in Tape and Reel

• Low Profile Package

Mechanical Characteristics:

• Case: Void–free, transfer-molded plastic

• Maximum Case Temperature for Soldering Purposes: 260°C for

10 seconds

• Finish: All external surfaces are corrosion resistant with readily solderable

leads

• Polarity: Cathode indicated by molded polarity notch

• Mounted Position: Any

MAXIMUM RATINGS AND CHARACTERISTICS

Rating

Symbol

Value

Unit

Peak Power Dissipation @ TL = 25°C, PW = 10/1000 µs (Note 1)

Ppk

400

Watts

Peak Forward Surge @ TA = 25°C (JEDEC Method, Note 2)

IFSM

40

Amps

Thermal Resistance from Junction to Lead

R

θJL

29

°C/W

Thermal Resistance from Junction to Ambient

R

θJA

150

°C/W

Instantaneous Forward Voltage @ 40 A

VF

3.5

Volts

Operating and Storage Junction Temperature Range

TJ, Tstg

150

°C

* FR4 Board, using Motorola minimum recommended footprint, as shown in case 403B outline dimensions spec.

1. Non–repetitive current pulse.

2. Measured on 0.3 ms single half sine–wave or equivalent square wave, duty cycle = 4 pulse per minute maximum.

Di

Reverse

Breakdown Voltage

Maximum

Reverse Voltage

Maximum

Reverse

Maximum

D

Device

Reverse

Stand–off

Voltage VRWM

(Volts)

VBR

Volts

(Min)

IT

mA

Reverse Voltage

@ IRSM

(Clamping Voltage)

VRSM (Volts)

Reverse

Surge Current

IRSM

(Amps)

Maximum

Reverse Leakage

@ VRWM

IR (µA)

Devce

Marking

1SMA5.0AT3

5.0

6.4

10

9.2

43.5

400

QE

1SMA6.0AT3

6.0

6.67

10

10.3

38.8

400

QG

1SMA6.5AT3

6.5

7.22

10

11.2

35.7

250

QK

1SMA7.0AT3

7.0

7.78

10

12.0

33.3

250

QM

1SMA7.5AT3

7.5

8.33

1

12.9

31.0

50

QP

1SMA8.0AT3

8.0

8.89

1

13.6

29.4

25

QR

1SMA8.5AT3

8.5

9.44

1

14.4

27.8

5.0

QT

1SMA9.0AT3

9.0

10

1

15.4

26.0

2.5

QV

* TOLERANCE AND VOLTAGE DESIGNATION Tolerance designation – The type number listed indicates a tolerance of

±5%.

(continued)

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Order this document

by 1SMA5.0AT3/D

© Motorola, Inc. 1996

1SMA5.0AT3

through

1SMA78AT3

PLASTIC SURFACE MOUNT

ZENER OVERVOLTAGE

TRANSIENT SUPPRESSORS

5.0 – 78 VOLTS VR

400 WATTS PEAK POWER

SMA

CASE 403B–01

PLASTIC

REV 1