V18AUMLA1812H Datasheet, PDF (2/7 Pages) Littelfuse – Surface Mount Multilayer Varistors (MLVs) > AUML Series

Varistor Products
Surface Mount Multilayer Varistors (MLVs) > AUML Series
Device Ratings and Specifications
Part Number
V18AUMLA1206
Maximum Ratings (125^ºC)
Maximum
Continuous
DC Voltage
V_M(DC)
Jump Start
Voltage
(5 Min)
V_JUMP
Load Dump
Energy
(10 Pulses)
W_LD
(V)
(V)
(J)
18
24.5
1.5
Specifications (25^ºC)
Nominal Varistor Voltage
at 10mA
DC Test Current
V_N(DC) Min
V_N(DC) Max
Maximum
Standby Leakage
(at 13V DC)
I_L
(V)
(V)
(µA)
23
32
50
V18AUMLA1210
18
24.5
3.0
23
32
50
V18AUMLA1812
18
24.5
6.0
23
32
100
V18AUMLA2220
18
24.5
25
23
32
200
V24AUMLA2220
24
24.5
25
32
39
200
V48AUMLA2220
48
24.5
25
54.5
66.5
200
NOTES:1.Average power dissipation of transients not to exceed 0.1W, 0.15W, 0.3W and 1W for model sizes 1206, 1210, 1812 and 2220 respectively.
2. Load Dump energy rating (into the suppressor) of a voltage transient with a resultant time constant of 115ms to 230ms.
3. Thermal shock capability per Mil-Std-750, Method 1051: -55ºC to 125ºC, 5 minutes at 25ºC, 25 Cycles: 15 minutes at each extreme.
4. For application specific requirements, please contact Littelfuse.
Maximum Clamping
Voltage (V_C) at
Test Current (8/20µs)
V_C
I_P
(V)
(A)
40
1.5
40
1.5
40
5.0
40
10.0
60
10.0
105
10.0
Current, Energy and Power 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 Characteristics Table for the specific
device. Certain parameter ratings must be derated at high
temperatures as shown below.
Peak Pulse Current Test Waveform for Clamping Voltage
100
50
100
90
80
70
60
50
40
30
20
10
0
-55 50 60 70 80 90 100 110 120 130 140 150
Figure 1
AMBIENT TEMPERATURE (^oC)
FIGURE 1. CURRENT, ENERGY AND POWER DERATING
Maximum Leaka^Cg^Ue^RVC^Eurrent/Clamping Voltage Curve for
AUML Series at 25ºC
MAXIMUM LEAKAGE
100
MAXIMUM CLAMPING VOLTAGE
1210/1206
1812
2220
0
T
O₁
T₁
TIME
Fi1g00ure 2
T ^{MAXIMUM LEAKAGE}
2
MAXIMUM CLAMPING VOLTAGE
0₁ = Virtual Origin of Wave
T= Time from 10% to 90% of Peak
1210/1206
1812
2220
121_F0_T/1_I2_G106_{U=RREis2e. PTEimAKe =PU1L.2S5E xCTURRENT TEST WAVEFORM}
10
T = ¹⁸¹²
22²20
Deca^Fy^OT^Rim^Ce^LAMPING
VOLTAGE
Example - For an 8/20 µs Current Waveform:
O₁
t
=
=
TVIIM^8RµTEUsFAR^{=LOTOM1R1I=G0%IRNTiOs}OF^e9W^T0A%^imVOEeF
PEAK
t₁ = VI²R⁰TU^µA^sL⁼FR^TO2 N⁼T^DTI^eM^cE^a=^y1^T.2ⁱ5^mx^et
1
t₂ = VIRTUALTIME TO HALFVALUE
10µ_(IA_MPUL1_S00_EµA_DURA1m_TA_ION) 10mA 100mA
1A
10A
100A
Typica_El V_XA-I_MC_PLh_Ea_:racteristics of th^CUe^RRV^EN1^T 8AUMLA2220 at -40ºC,
25ºC, 85ºC and 125ºC ^FIGF^UO^RR^{E 2}A^{. M}N^AX8^IM/2^U0^{M LE}s^AKC^AU^GER^CR^UE^RRN^ET^NTW^/CLA^AV^MPE^INF^GO^VOR^LM^{TAGE CURVE FOR AUML SERIES AT 25oC}
8 s = t₁ = VIRTUAL FRONT TIME
20 s = t₂ = VIRTUALTIME TO
100
HALF VALUE
1210/1206
10
1812
2220
10
-40^oC
25^oC
85^oC
125^oC
1
10µA
100µA
1mA
10mA
100mA
1A
Figure 3
CURRENT
10A
100A
1
1µA
Figure 4
10µA 100µA
1mA
10mA 100mA
1A
CURRENT
10A
100A 1000A
FIGURE 2. MAXIMUM LEAKAGE CURRENT/CLAMPING VOLTAGE CURVE FOR AUML SERIES AT 25^oC
FIGURE 3. TYPICAL V-I CHARACTERISTICS OF THE V18AUMLA2220 at -40^oC, 25^oC, 85^oC AND 125^oC
AUML Varistor Series
100
56
Revised: February 21, 2014
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/AUML.html for current information.