V3.5MLA0805A Littelfuse Inc, V3.5MLA0805A Datasheet - Page 7

• Manufacturer Part Number: V3.5MLA0805A
• Description: VARISTR TVS MULTI 3.5V 120A 0805
• Manufacturer: Littelfuse Inc
• Series: MLr

Specifications of V3.5MLA0805A

• Varistor Voltage: 7V
• Current-surge: 120A
• Number Of Circuits: 1
• Maximum Ac Volts: 2.5VAC
• Maximum Dc Volts: 3.5VDC
• Energy: 0.30J
• Package / Case: 0805 (2012 Metric)
• Suppressor Type: Transient Voltage
• Peak Surge Current @ 8/20µs: 120A
• Varistor Case: 0805
• Clamping Voltage Vc Max: 13V
• Peak Energy (10/1000us): 0.3J
• Voltage Rating Vdc: 3.5V
• Voltage Rating Vac: 2.5V
• Product: MLV
• Voltage Rating Dc: 3.5 V
• Capacitance: 2530 pF
• Operating Temperature Range: - 55 C to + 125 C
• Dimensions: 2.01 mm L x 0.50 mm H
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free by exemption / RoHS Compliant

Device Characteristics
At low current levels, the V-I curve of the multilayer transient voltage
suppressor approaches a linear (ohmic) relationship and shows a
working voltage, the suppressor is in a high resistance mode (approach-
ing 10
maximum rated voltage are below 50µA, typically 25µA; for 0402 size
below 10µA, typically 5µA.
Speed of Response
The Multilayer Suppressor is a leadless device. Its response time is not
limited by the parasitic lead inductances found in other surface mount
packages. The response time of the Zinc Oxide dielectric material is less
than 1 nanosecond and the ML can clamp very fast dV/dT events such
as ESD. Additionally, in “real world” applications, the associated circuit
wiring is often the greatest factor effecting speed of response. Therefore,
transient suppressor placement within a circuit can be considered
important in certain instances.
Surface Mount Varistors
Multilayer Transient Voltage Surge Suppressors
temperature dependent effect (Figure 10). At or below the maximum
RoHS
TERMINATION
FIGURE 10. TYPICAL TEMPERATURE DEPENDANCE OF THE CHARACTERISTIC
METAL END
174
6
Ω at its maximum rated working voltage). Leakage currents at
100%
10%
ML Varistor Series
1E
FIRED CERAMIC
-9
CURVE IN THE LEAKAGE REGION
DIELECTRIC
1E
FIGURE 11. MULTILA YER INTERNAL CONSTRUCTION
-8
25
o
DEPLETION
DEPLETION
50
REGION
REGION
o
1E
75
-7
o
SUPPRESSOR CURRENT (A
100
o
1E
125
-6
o
C
1E
-5
DC
1E
GRAINS
)
-4
1E
METAL
ELECTRODES
w w w . l i t t e l f u s e . c o m
-3
1E
-2
Energy Absorption/Peak Current Capability
Energy dissipated within the ML is calculated by multiplying the clamping
voltage, transient current and transient duration. An important advantage
of the multilayer is its interdigitated electrode construction within the mass
of dielectric material. This results in excellent current distribution and the
peak temperature per energy absorbed is very low. The matrix of semicon-
ducting grains combine to absorb and distribute transient energy (heat)
(Figure 11). This dramatically reduces peak temperature; thermal stresses
and enhances device reliability.
As a measure of the device capability in energy and peak current
handling, the V26MLA1206A part was tested with multiple pulses at its
peak current rating (150A, 8/20µs). At the end of the test, 10,000 pulses
later, the device voltage characteristics are still well within specification
(Figure 13).
100
10
100
FIGURE 12. CLAMPING VOLTAGE OVER TEMPERATURE
10
0
PEAK CURRENT = 150A
8/20µs DURA TION, 30s BETWEEN PULSES
-60
-40
2000
FIGURE 13. REPETITIVE PULSE CAPABILITY
(V
-20
C
AT 10A)
0
4000
TEMPERATURE (
NUMBER OF PULSES
20
6000
40
60
o
C)
8000
V5.5MLA1206
80
V26MLA1206
V26MLA1206
100
10000
120
140
12000