SMAJ5.0 THRU SMAJ170CA
400W
SURFACE MOUNT TRANSIENT VOLTAGE RECTIFIERS
FEATURES :
400W surge capability at 1ms
Excellent clamping capability
Low zener impedance
Fast response time : typically less
then 1.0 ps from 0 volt to V
BR(min.)
Typical I
R
less then 1
µ
A above 10V
MECHANICAL DATA
* Case : SMA Molded plastic
* Epoxy : UL94V-O rate flame retardant
* Lead : Lead Formed for Surface Mount
* Polarity : Color band denotes cathode end except Bipolar.
* Mounting position : Any
* Weight : 0.064 grams
MAXIMUM RATINGS
Rating at Ta = 25
°
C ambient temperature unless otherwise specified.
Rating
Peak Pulse Power Dissipation (Note1,2,5) Fig. 4
Peak Forward Surge Current per Fig. 5 (Note 3)
Peak Pulse Current on 10/1000
µ
s
waveform (Note 1, Fig. 1)
Steady State Power Dissipation (Note 4)
Operating Junction and Storage Temperature Range
Notes :
Symbol
P
PPM
I
FSM
I
PPM
P
M(AV)
T
J,
T
STG
Value
Minimum 400
40
See Table
1.0
- 55 to + 150
Units
Watts
Amps
Amps
Watt
°
C
(1) Non-repetitive Current pulse, per Fig. 3 and derated above Ta = 25
°
C per Fig. 1
(2) Mounted on 5.0mm (0.013mm) copper pads to each terminal.
(3) 8.3ms single half sine-wave duty cycle=4 pulses per minutes maximum.
(4) Lead temperature at T
L
=75
°
C
(5) Peak pulse power waveform is 10/1000µs.
2
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SMAJ5.0 THRU SMAJ170CA
400W
SURFACE MOUNT TRANSIENT VOLTAGE RECTIFIERS
FIG.1- PEAK PULSE POWER RATING CURVE
PEAK PULSE POWER (Pppm) or CURRENT (lpp)
DERATING IN PERCENTAGE, %
100
100
FIG.2- PULSE DERATING CURVE
Pppm, PEAK PULSE POWER, KW
NON-REPETITIVE
PULSE WAVEFORM
SHOWN in FIG. 3
T
A
=25
0
C
75
10
50
1.0
25
0.2" sq 5.0mm
2
COPPER PAD AREAS
0.1
0.1 s
1.0 s
10 s
100 s
1.0ms
10ms
0
0
25
50
75
100
125
O
150
175
200
td. PULSE WIDTH, sec.
TA, AMBIENT TEMPERATURE. C
FIG.3- PULSE WAVEFORM
150
FIG.4- TYPICAL JUNCTION CAPACITANCE
10,000
lppm, PEAK PULSE CURRENT %
PULSE WIDTH (td) is DEFINED
tr=10 sec. AS THE POINT WHERE THE PEAK
CURRENT DECAYS to 50% of lppm
100
PEAK VALUE
lppm
HALF VALUE- lpp
2
Cj, JUNCTION CAPACITANCE, pF
Tj=25
0
C
f=1.0MHz
Vsig=50mVp-p
1,000
MEASURED AT
ZERO BIAS
50
10/1000 sec. WAVEFORM
AS DEFINED BY R.E.A.
0
0
td
1.0
2.0
t, TIME, ms
3.0
4.0
100
MEASURED AT
STAND-OFF
VOLTAGE,V
WM
10
1
10
V(BR), BREAKDOWN VOLTAGE. (V)
100
200
FIG.5- MAXIMUM NON-REPETITIVE PEAK FORWARD
SURGE CURRENT
50
PEAK FORWARD SURGE CURRENT. (A)
40
8.3ms Single Half Sine Wave
JEDEC Method
TJ=TJ max.
30
20
10
0
1
10
NUMBER OF CYCLES AT 60Hz
100
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