SMAJ3.3A
Surface Mount Transient Voltage Suppressor Rectifiers
Reverse Voltage 3.30 V
400 Watt Peak Pulse Power
Features
● Glass passivated chip
● 400 W peak pulse power capability with a 10/1000
us waveform, repetitive rate (duty cycle):0.01 %
● Excellent clamping capability
● Low reverse leakage
● Very fast response time
● Lead and body according with RoHS standard
Mechanical Data
● Case: DO-214AC/SMA Molded plastic
● Lead: Solderable per MIL-STD-750, method 2026
● Epoxy: UL 94V-0 rate flame retardant
● Polarity: Color band denotes cathode end except Bipolar
● Mounting position: Any
Maximum Ratings & Characteristics Ratings at 25℃ ambient temperature unless otherwise specified.
Unit
W
A
W
A
V
℃
Note:
1)Non-repetitive current pulse per Fig.5 and derated above TA= 25 °C per Fig.1；
2)Measured on 8.3 ms single half sine-wave or equivalent square wave, duty cycle = 4 pulses per minute maximum；
Reverse
Stand-off
Voltage
Test
Current
Max. Clamping
Voltage @ I
PP
Max. Peak
Pulse
Current
Max. Reverse
Leakage @ V
RWM
UNI-POLAR UNI
V
RWM
(V)
Min.(V) Max.(V)
I
T
(mA) V
C MAX.
(V) I
PP
(A) I
R
(uA)
SMAJ3.3A 3V3
3.30
5.2 6.0 10 8.0 50 800
Operating junction and storage temperature range
T
J
，T
STG
-55 to +150
Device
Marking
Code
Breakdown
Voltage
V
BR
@ I
T
Peak forward surge current, 8.3 ms single half sinewave
unidirectional only
(2)
I
FSM
40
Maximum instantaneous forward voltage at 10 A for
unidirectional only
V
F
3.5
Peak pulse current wih a 10/1000 us waveform
(1)
I
PP
50
Power dissipation on infinite heatsink at TL = 75 °C
P
D
1.0
Peak power dissipation with a 10/1000 us waveform
(1)
P
PP
400
DO-214AC/SMA
Unit: inch (mm)
Parameter
Symbols
Value
REV.1.2,2022-02
Changzhou zhide Electronics CO.,LTD
www.cz-zhide.com
SMAJ3.3A
Ratings and Characteristics Curves (TA=25℃ unless otherwise noted)
0
25
50
75
100
0 25 50 75 100 125 150 175 200
10X1000Waveform
as defined REA
PEAKPULSE DETATING IN % OF
PEAK POWER OR CUNRRENT
Fig. 1-Pulse Derating Curve
Fig. 2-Maxmum Non-Repetitive Surge Current
0.0
0.2
0.4
0.6
0.8
1.0
0 25 50 75 100 125 150 175 200
PM
(AV)
STEADY STATE POWER DISSIPATION(W)
60Hz Resistive or
Inductive Load
0
10
20
30
40
50
60
1 10 100
Pulse Width 8.3ms
Single Half-Sine-Wave
(JEDEC METHOD)
0.01
0.1
1
10
1 10 100 1000 10000
Pulse Width,t
d
(us)
Peak Power (KW)
Fig. 3-Steady State Power Derating Curve
Fig. 4-Peak Pulse Power Rating Curve
Number of Cycles at 60 Hz
Ambient Temperature,T
A
(℃)
Peak Forward Surge Current, (A)
0
50
100
0 1 2 3 4
Tr=10us
Peak Value (Ipp)
Half Value=IPP/2
10/1000 usec.Waveform
as defined by R.E.A
Tj=25℃
Pulse Width(td) is defined as the
point where the peak current
decays to 50% of IPP
Peak Pulse Current,(%)
Fig. 5-Pulse Waveform
1
10
100
1000
10000
1 10 100 1000
Fig. 6-Typical Junction Capacitance
Junction Capacitancem, C
J
(pF)
Reverse Breakdown Voltage, V
BR
(V)
Time,(ms)
Bi-directional
@zener bias
Uni-directional
@zener bias
Uni-directional@V
RWM
Bi-directional@V
RWM
T
J
=25℃
f=1.0MHz
Lead Temperature,T
L
(℃)
REV.1.2,2022-02
Changzhou zhide Electronics CO.,LTD
www.cz-zhide.com