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
Fig.2 - Pulse Derating Curve
100
10
1
100
Non-repetitive Pulse
Wavetorm shown in Fig.3
87.5
T
A = 25°C
75
62.5
50
SMAJ5.0 –
SMAJ78
SMAJ85A –
SMAJ170
37.5
25
0.2x0.2"(5.0x5.0mm)
Copper Pad Areas
12.5
0
0.2x0.2"(5.0x5.0mm)
Copper Pad Areas
0.1
0.1µs
1.0µs
10µs
100µs
1.0ms
10ms
0
25
50
75
100
125
150
175
200
t - Pulse Width (sec.)
d
T
- Ambient Temperature (°C)
A
Fig.4 - Typical Junction Capacitance
Fig.3 - Pulse Waveform
10000
1000
100
150
100
TJ = 25°C
T
= 25°C
f = 1.0MHZ
J
t = 10µsec.
r
Vsig = 50mVp-p
Measured at
Stand-Off
Pulse Width(td)is defined
as the point where the
peak current decays to
50% of IPPM
Peak Value
IPPM
Voltage, VWM
Half Value- IPPM
2
Uni-Directional
Bi-Directional
10/1000µsec.Waveform
as defined by R.E.A.
50
10
1000
10
t
1
200
V
- Reverse Stand-Off Voltage 1(V00)
0
WM
4.0
3.0
0
1.0
2.0
4.0
t - Time(ms)
Fig. 5 - Typ.Transient Thermal Impedance
1000
200
TJ = TJ max,
8.3ms Single Half Sine-Wave
(JEDEC Method)
100
100
10
1
50
10
0
0.2
0.4
0.6
0.8
1
1.2
0
0.2
0.4
0.6
0.8
1
1.2
tp-Pulse Duration (sec)
Number of Cycles at 60 Hz
MDE [ MDE SEMICONDUCTOR, INC. ]
