Leaded Varistors
VM Series Dual Function Automotive Grade 125°C
Overview
KEMET's VM series of dual function protective devices
protect against voltage surges in an automotive voltage
region and against radio frequency noise. This component
replaces two components – a low voltage varistor and a
capacitor.
KEMET's VM series incorporate a varistor function in
automotive applications in a voltage region of 12 V,
24 V and 42 V and a function of a radio-frequency filtering
capacitor in a high capacitance range from 0.47 to 1.5 µF,
making them ideal for protection in automobile electronic
applications.
KEMET's VM series are square shaped components with in-
line leads and require at least 30% less mounting space.
Applications
Typical applications include the protection against voltage
transients and suppression of radio-frequency interference
in automobile electronics including wiper motors, central
locking systems, seat adjustment motors, seat heating and
electric window systems.
Benefits
• Through-hole form factor
• Operating ambient temperature of −40°C to +125°C
• Supply voltage of 12 V, 24 V and 42 V
• Operating voltage of 16 to 56 VDC
• Capacitance range at 1 kHz of 0.47 to 1.5 μF
• X7R capacitor temperature characteristics
• Dimensional and weight savings on the board
• RoHS 2 2011/65/EC, REACH compliant
• AEC-Q200 qualified Grade 1
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© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
V0007_VM • 11/3/2016
1
Leaded Varistors
VM Series Dual Function Automotive Grade 125°C
Ordering Information
VM
Series
Varistor Dual
Function
Leaded 125°C
Automotive
Grade Varistor/
Capacitor
(X7R Dielectric)
474
Capacitance
Code (µF)
474 = 0.47
105 = 1.0
155 = 1.5
M
K
801
Maximum Surge
Current Code
801 = 800 A
122 = 1,200 A
R
Packaging/
Lead Style
B = Bulk
/Straight
Lead
R = Reel
/Straight
Lead
014
Maximum Continuous
Working Voltage
(Vrms AC)
12 V Power Supply
014 = 14 Vrms AC
017 = 17 Vrms AC
24 V Power Supply
020 = 20 Vrms AC
030 = 30 Vrms AC
42 V Power Supply
040 = 40 Vrms AC
P050
Pitch Code
P050 = 5mm
P120 = 12mm
Capacitance
Tolerance of
Tolerance Code Varistor Voltage
M = ±20%
K = ±10%
Dimensions – Millimeters
D
2
Maximum
t
h
I
R
As per part number table.
d
Environmental Compliance
RoHS 2 2011/65/EC, REACH
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
V0007_VM • 11/3/2016
2
Leaded Varistors
VM Series Dual Function Automotive Grade 125°C
Performance Characteristics
Continuous
Steady State Applied Voltage
DC Voltage Range (V
dc
)
AC Voltage Range (V
rms
)
Transient
Load Dump Energy, (WLD)
Non-Repetitive Surge Current, 8/20 µs Waveform (I
max
)
Non-Repetitive Surge Energy, 10/1000 µs Waveform (W
max
)
Capacitance Range
Capacitor Temperature Characteristics
Operating Ambient Temperature
Storage Temperature Range
Threshold Voltage Temperature Coefficient
Insulation Resistance
Isolation Voltage Capability
Response Time
Climatic Category
°C
°C
%/°C
GΩ
kV
ns
J
A
J
µF
6 to 12
800 to 1,200
2.4 to 10.5
0.47 to 1.5
X7R
−40 to +125
−40 to +150
< + 0.05
>1
> 1.25
< 25
40/125/56
V
V
16 to 56
14 to 40
Units
Value
Qualifications
Reliability
Parameter
Test
Tested According to
EN 132 400, Test 4.2.1. - the voltage shall be raised from near
zero to the test voltage
Vt at a rate not exceeding 150 V/s, Where for:
Class X1 Capacitors Vt = 2*Vrms + 1,500 V~, 1 minute
Class Y1 Capacitors Vt = 4000 V~, 1 minute
Class Y2 Capacitors Vt = 2*Vrms + 1,500 V~, 1 minute
EN 132 400, Test 4.13. - 24 impulses of the same polarity shall be
applied to the capacitor. The time between impulses shall be no
ledd than 10s, where for:
Class X1 Capacitors Vp = 4 kV
Class Y1 Capacitors Vp = 8 kV
Class Y2 Capacitors Vp = 5 kV
Condition to be Satisfied
after Testing
no permanent breakdown of flash-
overs during the test period
Voltage Proof
Vt
Impulse Voltage
no self-healing breakdowns or flash-
overs
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
V0007_VM • 11/3/2016
3
Leaded Varistors
VM Series Dual Function Automotive Grade 125°C
Qualifications cont'd
Reliability
Parameter
AC/DC Bias
Reliability
Test
Tested According to
EN 132 400, Test 4.14, 1000 h at UCT, where:
– for X Class Capacitors: at V = 1.25 Vrms and once per hour
the voltage shall be increased to 1000 V~ for 0,1 s
– for Y Class Capacitors: at V = 1.7 Vrms and once per hour
the voltage shall be increased to 1,000 V~ for 0,1 s
EN 132 400, Test 4.15. – 10.000 cycles of charge and discharge
at the rate of one operation per minute with the test voltage of
SQRT (2)*Vrms discharge rate adjusted to 100 V/µs
EN 132 400, Test 4.16. – measurement of capacitor impedance
over a range of frequencies
Measurement of capacitance and tan 6 in the temperature
chamber at 20 °C and at UCT and LTC
EN 132 400, Test 4.11
a) Dry heat, 16 h, UCT, Test Ba, IEC 68–2–2
b) Damp heat, cyclic, the first cycle: 55°C, 93 % RH, 24 H,
test DB, IEC 68–2–1
c) Cold, LCT, 2 h, Test Aa, IEC 68–2–1
d) Damp heat cyclic, remaining 5 cycles: 55°C, 93 % RH,
24 h/cycle, Test Bd, IEC 68–2–30
EN 132 400, Test 4.6, Test Na, IEC 68–2–14, 5 cycles UCT/LCT,
30 minutes
EN 132 400, Test 4.6, Test Na, IEC 68–2–14, 5 cycles UCT/LCT,
30 minutes
Condition to be Satisfied
after Testing
no visible damage
|ΔC/C| < 20 %
tan δ < 0.008
IR greater than 50 % of the applicable
limits no permanent breakdown or
flash-over during voltage proof
|ΔC/C| < 10 %
tan δ < 0,008
IR greater than 50 % of the
applicable limits
with specification
with specification
no visible damage
|ΔC/C| < 20 %
tan δ < 0.008
IR greater than 50 % of the applicable
limits no permanent breakdown or
flash-over during voltage proof
no visible damage
no visible damage
|ΔC/C| < 20 %
tan δ < 0.008
IR greater than 50 % of the applicable
limits no permanent breakdown or flash-
over during voltage proof
no visible damage
|ΔC/C| < 20 %
tan δ < 0.008
IR greater than 50 % of the applicable
limits no permanent breakdown or flash-
over during voltage proof
Solderable at shipment and after 2 years
of storage - limits
no visible damage |AC/C| < 10 %
no visible damage
no visible damage
"|ΔC/C| < 10 %
tan δ within specification
no visible damage"
AC/DC
Life Test
Charge and
Discharge
Radio – Frequency
Characteristics
Capacitance –
Temperature
Characteristics
Climatic
Sequence
Thermal
Shock
Environmental and
Storage Reliability
Steady State
Damp Heat
ICE 68–2–2, Test Ba 1,000 h at maximum storage temperature
Storage Test
SolderabiLity
Resistance
to Soldering
Heat
Robustness of
Termination
Vibration
Mechanical
Shock
EN 132 400, Test 4.5., Test Ta, IEC 68–2–20, solder bath and
reflow method
EN 132 400, Test 4.4., Test Tb, IEC 68–2–20, solder bath and
reflow method
EN 132 400, Test 4.3., Test Ua, IEC 68–2–21
EN 131 400, Test 4.7., Test Fc, IEC 68–2–6,
Frequency range 10 to 55 Hz; Amplitude 0.75 mm or 98 m/s2
Total duration 6 h (3 x 2 h); Waveshape – half sine
EN 132 400, Test 4.9, Test Ea, IEC 68–2–27
Acceleration = 490 m/s2; 100 g 6ms and 50 g 11 ms
Waveshape – half sine; Number of shocks = 3 x 6
Mechanical
Reliability
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
V0007_VM • 11/3/2016
4
Leaded Varistors
VM Series Dual Function Automotive Grade 125°C
Application Circuit
Provides for the elimination of transients and EMI noise in automotive electronics such as engine control, exhaust gas
control, safety systems, etc. against disturbances caused by small motors used in automobiles. Most frequently, small
motors in an automobile are those used for windscreen wipers, window mechanisms, seat adjustments and automatic door
locking.
L
M
L
GND
+12 V
+24 V or
+42 V
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
V0007_VM • 11/3/2016
5
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