Communication BUS Varistor
GENERAL DESCRIPTION
The CAN BUS and FlexRay varistor is a zinc oxide (ZnO) based ceramic semiconductor device
with non-linear voltage-current characteristics (bi-directional) similar to back-to-back Zener
diodes and an EMC capacitor in parallel (see equivalent circuit model). They have the added
advantage of greater current and energy handling capabilities as well as EMI/RFI attenuation.
Devices are fabricated by a ceramic sintering process that yields a structure of conductive ZnO
grains surrounded by electrically insulating barriers, creating varistor like behavior.
HOW TO ORDER
CAN
Style
CAN = CAN BUS
FLX = FlexRay
0001
Case Size
0001 = 0603 Discrete
0002 = 0405 2-Element
0004 = 0612 4-Element
0005 = 0402 Discrete
D
P
Packaging Code
Termination
(Reel Size)
P = Ni/Sn Alloy
D = 7" reel (1,000 pcs.)
(Plated)
R = 7" reel (4,000 pcs.)
T = 13" reel (10,000 pcs.)
W = 7" reel (10,000 pcs.) 0402 and 0201 only
PERFORMANCE CHARACTERISTICS
AVX Part No.
CAN0001_ _
CAN0002_ _
CAN0004_ _
CAN0005_ _
FLX0005_ _
V
W
(DC)
≤18
≤18
≤18
≤18
≤18
V
W
(AC)
≤14
≤14
≤14
≤14
≤14
V
B
120
70
100
33
26
I
L
2
2
2
2
5
E
T
0.015
0.015
0.015
0.015
0.020
I
P
4
4
4
4
4
Cap.
22
22
22
37
17
Case Size
0603
0405
0612
0402
0402
Elements
1
2
4
1
1
Termination Finish Code
Packaging Code
V
W
(DC)
V
W
(AC)
V
B
V
C
I
VC
DC Working Voltage (V)
AC Working Voltage (V)
Typical Breakdown Voltage (V @ 1mA
DC
)
Clamping Voltage (V @ I
VC
)
Test Current for V
C
(A, 8x20μS)
I
L
E
T
I
P
Cap
Temp Range
10.0
Insertion Loss (dB)
0.0
-10.0
-20.0
-30.0
-40.0
-50.0
Maximum Leakage Current at the Working Voltage (μA)
Transient Energy Rating (J, 10x1000μS)
Peak Current Rating (A, 8x20μS)
Maximum Capacitance (pF) @ 1 MHz and 0.5Vrms
-55ºC to +125ºC
EQUIVALENT CIRCUIT MODEL
Discrete MLV Model
PCB
Trace
L
P
To Device
Requiring
Protection
R
V
C
R
P
Ron
Solder Pad
0
1
CAN0001
10
100
CAN0005
1000
FLX0005
10000
Frequency (MHz)
Where: R
v
R
p
=
≥
Voltage Variable resistance (per VI curve)
10
12
Ω
Peak Power (W)
Typical Pulse Rating Curve
10000
1000
100
10
10
100
1000
10000
C
=
R
on
=
=
L
p
defined by voltage rating and energy level
turn on resistance
parallel body inductance
LEAD-FREE COMPATIBLE
COMPONENT
Pulse Duration (µS)
63
Communication BUS Varistor
PHYSICAL DIMENSIONS
0402 Discrete
Length
Width
Thickness
Term Band Width
1.00 ±0.10 (0.040 ±0.004)
0.50 ±0.10 (0.020 ±0.004)
0.60 Max. (0.024 Max.)
0.25 ±0.15 (0.010 ±0.006)
mm (inches)
0603 Discrete
1.60 ±0.15 (0.063 ±0.006)
0.80 ±0.15 (0.032 ±0.006)
0.90 Max. (0.035 Max.)
0.35 ±0.15 (0.014 ±0.006)
0405 Array
1.00 ±0.15 (0.039 ±0.006)
1.37 ±0.15 (0.054 ±0.006)
0.66 Max. (0.026 Max.)
0.36 ±0.10 (0.014 ±0.004)
0612 Array
1.60 ±0.20 (0.063 ±0.008)
3.20 ±0.20 (0.126 ±0.008)
1.22 Max. (0.048 Max.)
0.41 ±0.10 (0.016 ±0.010)
SOLDER PAD DIMENSIONS
0402/0603 Discrete
0405 Array
E
D
mm (inches)
0612 Array
E
D
A
A
A
B
C
C
B
C
B
A
B
A
B
0.51
(0.020)
0.76
(0.030)
0.74
(0.029)
1.65
(0.065)
C
1.70
(0.067)
2.54
(0.100)
0.12
(0047)
2.54
(0.100)
D
–
–
0.38
(0.015)
0.46
(0.018)
E
–
–
0.64
(0.025)
0.76
(0.030)
APPLICATION
AVX CAN BUS and FlexRay varistors offer significant advantages
in general areas of a typical CAN or FlexRay network as shown
on the right. Some of the advantages over diodes include:
• space savings
• higher ESD capability @ 25kV contact
• higher in rush current (4A) 8 x 20μS
• FIT rate ≤0.1 failures (per billion hours)
0402 Discrete
0603 Discrete
0405 Array
0612 Array
0.61
(0.024)
0.89
(0.035)
0.46
(0.018)
0.89
(0.035)
0402, 0603
Discrete
0405
Array
0612
Array
FlexRay
TM
CAN
Wheel Node
Wheel Node
Powertrain
Body Control
Module/CAN
Gateway
X-by-Wire Master
Smart
Junction Box
Instrument
Cluster
Dash Board
Node
Door
Module
HVAC
Wheel Node
Wheel Node
64
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