metal-oxide varistors (MOVs) manufactured in leadless
chip form. They are intended for use in a variety of
applications from low voltage DC to off-line board-level
protection. These devices, which have significantly
lower profiles than traditional radial lead varistors,
permit designers to reduce the size and weight and
increase the reliability of their equipment designs.
CH Series varistors are available in a voltage range from
14V to 275V (V
M(AC)RMS
), and energy ratings up to 8J.
Agency Approvals
See the Littelfuse Multilayer Suppressor Series also.
Features
•
•
RoHS compliant
Leadless, surface
mount chip in 5
x 8mm Size
Voltage ratings
V
M(AC)RMS
14V to 275V
•
•
•
Supplied in tape and
reel or bulk pack
No derating up to
125ºC ambient
High surge rated
up to 600A
Recognized under the components program of
Underwriters Laboratories.
Agency
Agency Approval
Agency File Number
UL1449
E320116
•
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
Steady State Applied Voltage:
AC Voltage Range (V
M(AC)RMS
)
DC Voltage Range (V
M(DC)
)
Transient:
Peak Pulse Current (I
TM
)
For 8/20µs Current (See Figure 2)
Single Pulse Energy Range
For 10/1000µs Current Wave (W
TM
)
Operating Ambient Temperature Range (T
A
)
Storage Temperature Range (T
STG
)
Temperature Coefficient (αV) of Clamping Voltage (V
C
) at Specified Test Current
CH Series
14 to 275
18 to 369
Units
V
V
100 to 600
1.0 to 8.0
-55 to +125
-55 to +150
<0.01
A
J
ºC
ºC
%/ºC
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of
the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
Specifications are subject to change without notice.
Revised: 09/14/17
Metal-Oxide Varistors
(MOVs)
Surface Mount Varistors > CH Series
Peak Pulse Current Test Waveform
0
1
= Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T
1
Origin
Time =
O
1
= Virtual
= Rise
of Wave
1.25 x T
T = Decay
to 90%
T = Time
2
From 10%
Time
of Peak
T
1
= Virtual Front time = 1.25 • t
Example:
T
2
= Virtual Time to Half Value (Impulse Duration)
For an 8/20
µs
Current Waveform:
Example: For an 8/20 s Current Waveform:
8µs = T
Front Time
= Rise Time
8 s = T
1
= Virtual
1
20µs = T
2
= Decay Time
20 s = T
2
= Virtual Time to Half Value
PERCENT OF PEAK VALUE
100
90
50
10
O
1
T
T
1
T
2
TIME
Figure 2
FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM
Clamping Voltage for V22CH8 – V68CH8
500
400
300
MAXIMUM PEAK VOLTS (V)
200
Clamping Voltage for V120CH8 – V430CH8
4,000
3,000
MAXIMUM PEAK VOLTS (V)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
22 TO 56V
N(DC)
RATING
T
A
= -55
o
C TO 125
o
C
2,000
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
100 TO 430V
N(DC)
RATING
T
A
= -55
o
C TO 125
o
C
V430CH8
V390CH8
V360CH8
100
90
80
70
60
50
40
30
20
V68CH8
V56CH8
V47CH8
V39CH8
V33CH8
V27CH8
V22CH8
1,000
900
800
700
600
500
400
300
200 V180CH8
V150CH8
V120CH8
100
10
-3
10
-2
V240CH8
V220CH8
V200CH8
10
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
3
Figure 3
PEAK AMPERES (A)
Figure 4
10
-1
10
0
10
1
10
2
PEAK AMPERES (A)
10
3
10
4
FIGURE 3. CLAMPING VOLTAGE FOR V22CH8 - V68CH8
FIGURE 4. CLAMPING VOLTAGE FOR V120CH8 - V430CH8
Pulse Rating Curves
Surge Current Rating Curves for V22CH8 - V56CH8
500
200
100
SURGE CURRENT (A)
50
20
10
5
2
1
0.5
0.2
20
100
1,000
IMPULSE DURATION (µs)
10,000
INDEFINITE
Surge Current Rating Curves for V120CH8 - V430CH8
1,000
500
250
SURGE CURRENT (A)
100
50
25
10
5
2.5
1
0.5
10
6
INDEFINITE
1
2
10
MODEL SIZE 5 x 8mm
V120CH8 - V430CH8
10
2
10
3
10
4
10
5
1
2
10
10
2
10
3
MODEL SIZE 5 x 8mm
V22CH8 - V56CH8
10
4
10
5
10
6
Figure 5
Figure 6
20
100
1,000
IMPULSE DURATION (µs)
10,000
NOTE: If pulse ratings are exceeded, a shift of V
N(DC)
(at specified current) of more than +/-10% could result. This type of shift, which normally results in a decrease of V
N(DC)
, may result in
FIGURE 5. SURGE CURRENT RATING CURVES FOR
the device not meeting the original published specifications, but it does not prevent the device from continuing to function, and to provide ample protection.
I just saw a post and would like to share it with you: This time, I want to discuss state-owned enterprise components. Domestic components should be divided into two types, one is produced by state-ow...
Hello everyone, I am a beginner in embedded systems. Since I cannot afford a development board, I am now learning to use Skyeye to simulate the environment. The embedded system I use is Linux, with ar...
[i=s]This post was last edited by Jacktang on 2021-8-9 08:26[/i]1. Notice on the designated devices for the sponsors of the 2021 TI Cup National Undergraduate Electronic Design Competition2. To ensure...
I’m about to collapse…
The lower computer is a single-chip microcomputer, which collects 2 time data for distance measurement: the data type is unsigned int, which is converted to uchar type and place...
[i=s]This post was last edited by hujj on 2019-1-5 22:44[/i] [color=#008000][backcolor=transparent]The development board ST NUCLEO-G071RB evaluated in this event is provided by STMicroelectronics. Tha...
With the promotion of the construction of intelligent communities in the country, anti-theft systems have become essential equipment for intelligent communities. Especially in recent years, the urg...[Details]
Hardware designers have begun to adopt FPGA technology in high-performance DSP designs because it can provide 10-100 times faster computing than PC-based or microcontroller-based solutions. Previou...[Details]
This program is written to simulate the serial port hardware mechanism. When used, a timed interrupt can be set with a time interval of 1/4 baud rate. The receiving function is called once for ea...[Details]
Microchip's PIC18F46J50 is a low-power, high-performance 8-bit USB microcontroller (MCU) using nanoWatt XLP technology. The current in deep sleep mode can be as low as 13nA, the operating voltage i...[Details]
1 Introduction
With the acceleration of the pace of urban modernization, society has higher requirements for urban road lighting and urban lighting projects. The state has clearly required tha...[Details]
Two simple circuits are implemented to drive two LEDs from a battery powered microprocessor.
This design is based on a circuit that uses three resistors and a microprocessor I/O pin as an input h...[Details]
DSP (digital signal processor) is used more and more frequently in today's engineering applications. There are three main reasons for this: first, it has powerful computing power and is capable of ...[Details]
1 Introduction
As an emerging microfabrication technology, micro-electromechanical system (MEMS) technology has begun to be applied in various fields. It can integrate functions such as inform...[Details]
AD8205 is
a single-supply high-performance differential
amplifier
launched by
Analog
Devices of the United States
. The typical single-supply voltage is 5V, and its common-mode volta...[Details]
Microcalorimetry
is used to determine energy relationships. Microcalorimetry techniques are often required when performing calorimetric experiments with small sample sizes or slow heating rat...[Details]
This week, Microsoft held its 2012 Microsoft Worldwide Partner Conference (WPC) in Toronto, Canada. At the conference, Microsoft showed its new products and services to partners around the world. A...[Details]
Smart lighting control systems provide high controllability for various buildings and further enhance the level of green energy. They are the core products of energy conservation and digital techn...[Details]
With the continuous consumption of earth's energy and the scarcity of resources, the harm of greenhouse effect to human beings, and the serious pollution of the atmosphere to the earth, the intern...[Details]
Flooded Batteries
This battery developed in Germany can be used to power flashlights, strobe lights and toys as long as it is filled with water. This battery can be stored for 50 years and can...[Details]
The traditional display screen using 51 single-chip microcomputer to control LED dot matrix has relatively simple functions. If it is to achieve diversified functions, it often takes a lot of time ...[Details]
Discrete Device
京公网安备 11010802033920号
EEWORLD
