V18MLA1206H Datasheet, PDF (3/8 Pages) Littelfuse – Varistor Products Surface Mount Multilayer Varistors (MLVs) > MLA Series

Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLA Series
Peak Current and Energy Derating Curve
When transients occur in rapid succession, the average
power dissipation is the energy (watt-seconds) per pulse
times the number of pulses per second. The power so
developed must be within the specifications shown
on the Device Ratings and Specifications Table for the
specific device. For applications exceeding 125°C ambient
temperature, the peak surge current and energy ratings
must be derated as shown below.
100
80
60
40
20
0
-55
Figure 1
50 60 70 80 90 100 110 120 130 140 150
AMBIENTTEMPERATURE ( ^oC)
FIGURE 1. PEAK CURRENT AND ENERGY
Limit V-I Chara^Dc^Ete^Rr^Ais^Tt^Ii^Nc^Gfo^Cr^UV^R5^V.5^EMLA0402 to V18MLA0402
100
MLA0402 Limit VI Curves
Peak Pulse Current Test Waveform for Clamping Voltage
100
50
0
O₁
Figure 2
T
T₁
T₂
TIME
0₁ = Virtual Origin of Wave
T= Time from 10% to 90% of Peak
F_TI₁G₌UR_RE_is2_e.
T^Pi^Em^Ae^K =^PU1^L.2^S5^Ex^CT^{URRENT TEST}
FOR CLAMPING VOLTAGE
WAVEFORM
T₂ = Decay Time
Example - For an 8/20 µs Current Waveform:
O₁
t
=
=
VIRTUAL ORIGIN OF WAVE
TI⁸M^µE^sF⁼RO^TM1 1⁼0%^RT^isO^e9^T0ⁱ%^mO^eF
PEAK
t₁ = V2IR0TµUsAL=FTR₂ON=TDTIeMcEa=y1T.2im5 xet
t₂ = VIRTUALTIME TO HALFVALUE
(IMPULSE DURATION)
EXAMPLE:
FOR AN 8/20 s CURRENT WAVEFORM
Limit V-₈I _sC₌h_ta₁ r₌a_Vc_IRt_Te_Ur_Ai_Lst_Fi_Rc_ONfo_T r_TIV_ME9MLA0402L
20 s = t₂ = VIRTUAL^MT^LIM^AE⁰⁴T⁰O^{2L Limit VI Curves}
HALF VALUE
100
10
V18MLA0402
V14MLA0402
V9MLA0402
V5.5MLA0402
1
1µA
10µA
100µA
1mA
10mA
1A
Figure 3
Current (A)
10A
100A
Limit V-I Characteristic for V3.5MLA0603 to V30MLA0603
1000
100
V30MLA0603
V26MLA0603
V18MLA0603
V14MLA0603
10
V9MLA0402L
V5.5MLA0402L
1
1µA
10µA
100µA 1mA
10mA 1A
Figure 4
Current (A)
10A
100A
Limit V-I Characteristic for V3.5MLA0805L to V30MLA0805L
1000
100
V30MLA0805L
V26MLA0805L
V18MLA0805L
V14MLA0805L
10
1
10µA
100µA
1mA
Figure 5
V9MLA0603, V9MLA0603L
V5.5MLA0603, V5.5MLA0603L
V3.5MLA0603
10mA
100mA
1A
Current (A)
10A
100A
10
1
10µA
100µA
1mA
Figure 6
10mA
100mA
Current (A)
V12MLA0805L
V9MLA0805L
V5.5MLA0805L
V3.5MLA0805L
1A
10A
100A
© 2013 Littelfuse, Inc. ^{FIGURE 5. LIMIT V-I CHARACTERISTIC FOR V3.5MLA0603 TO V30MLA0603}
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html or MLA.html for current information.
41
Revised: December 16, 2013
FIGURE 6. LIMIT V-I CHARACTERISTIC FOR V3.5MLA0805L TO V30MLA0805L
MLA Varistor Series