V18AUMLA1206_06 Datasheet, PDF (3/9 Pages) Littelfuse – Multilayer Transient Voltage Surge Suppressor

Multilayer Transient Voltage Surge Suppressor
RoHS _{AUML Varistor Series}
V-I Characteristics Curves
MAXIMUM LEAKAGE
100
MAXIMUM CLAMPING VOLTAGE
1210/1206
1812
2220
1210/1206
3
10
1812
2220
1
10µA
100µA
1mA
10mA
100mA
1A
10A
100A
CURRENT
FIGURE 2. MAXIMUM LEAKAGE CURRENT/CLAMPING VOLTAGE CURVE FOR AUML SERIES AT 25^oC
100
-40^oC
10
25^oC
85^oC
125^oC
1
1µA
10µA
100µA
1mA
10mA
100mA
1A
10A
100A
1000A
CURRENT
FIGURE 3. TYPICAL V-I CHARACTERISTICS OF THE V18AUMLA2220 at -40^oC, 25^oC, 85^oC AND 125^oC
Temperature Effects
In the leakage region of the AUML suppressor, the device characteristics
approaches a linear (ohmic) relationship and shows a temperature
dependent affect. In this region the suppressor is in a high resistance
mode (approaching 10⁶Ω) and appears as a near open-circuit. Leakage
currents at maximum rated voltage are in the microamp range. When
clamping transients at higher currents (at and above the ten milliamp
range), the AUML suppressor approaches a 1-10 characteristic. In
this region the characteristics of the AUML are virtually temperature
independent. Figure 3 shows the typical effect of temperature on the
V-I characteristics of the AUML suppressor.
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