MDE Semiconductor, Inc.
78-150 Calle Tampico, Unit 210, La Quinta, CA., USA 92253 Tel: 760-564-8656 • Fax: 760-564-2414
1-800-831-4881 Email: sales@mdesemicondutor.com Web: www.mdesemiconductor.com
RATING AND CHARACTERISTIC CURVES SMAJ SERIES
Fig. 1 - Peak Pulse Power Rating
100
Peak Pulse Power (P
PP
) or Current (I
PPM
)
Derating in Percentage,%
Fig.2 - Pulse Derating Curve
100
87.5
75
62.5
50
37.5
25
12.5
0
0
25
50
75
100
125
150
175
200
P
PPM
-Peak Pulse Power (kW)
Non-repetitive Pulse
Wavetorm shown in Fig.3
T
A
= 25°C
10
SMAJ85A –
SMAJ170
1
SMAJ5.0 –
SMAJ78
0.2x0.2"(5.0x5.0mm)
Copper Pad Areas
0.1
0.1µs
1.0µs
10µs
100µs
1.0ms
10ms
0.2x0.2"(5.0x5.0mm)
Copper Pad Areas
t
d
- Pulse Width (sec.)
T
A
- Ambient Temperature (°C)
Fig.3 - Pulse Waveform
I
PPM
- Peak Pulse Current,% I
RSM
150
Pulse Width(td)is defined
as the point where the
peak current decays to
50% of I
PPM
Fig.4 - Typical Junction Capacitance
10000
Peak Value
I
PPM
100
Half Value- I
PPM
2
C
J
- Junction Capacitance(pF)
t
r
= 10µsec.
T
J
= 25°C
1000
T
J
= 25°C
f = 1.0MH
Z
Vsig = 50mVp-p
Measured at
Stand-Off
Voltage, V
WM
Uni-Directional
100
Bi-Directional
50
10/1000µsec.Waveform
as defined by R.E.A.
10
1000
t
d
0
0
1.0
2.0
3.0
1
10
4.0
4.0
V
WM
- Reverse Stand-Off Voltage (V)
100
200
t - Time(ms)
Fig. 5 - Typ.Transient Thermal Impedance
1000
200
I
FSM
-Peak Forward Surge Current (A)
Transient Thermal Impedance
(
℃
/W)
T
J
= T
J
max,
8.3ms Single Half Sine-Wave
(JEDEC Method)
100
100
50
10
1
0
0.2
0.4
0.6
0.8
1
1.2
10
0
0.2
0.4
0.6
0.8
1
1.2
t
p
-Pulse Duration (sec)
Number of Cycles at 60 Hz
MDE [ MDE SEMICONDUCTOR, INC. ]
