| ¡ñ Features |
¡¤ Widely voltage range 18v-1.8kv
¡¤ Fast response to the rapidly increase Voltage (Musec.)
¡¤ Excellent non-linearity voltage
¡¤ Symmetric V-I characteristics
¡¤ Great withstanding surge current (2000A/cm2)
¡¤ No follow-on current
¡¤ Long life |
| ¡¡
¡ñ How to
order
|
|
FNR
|
¡ª
|
05
|
K
|
180
|
T
|
|
|
|
|
Element
Diameter(mm)
|
|
05
|
5
|
|
40
|
40
|
|
|
Tolerance
|
|
K
|
¡À10%
|
|
M
|
¡À20%
|
|
|
Varistor
Voltage (v)
|
|
180=18x100
|
|
181=18x101
|
|
182=18x102
|
|
|
Packing
|
|
B
|
Bulk
|
|
T
|
Tape & Reel
|
|
|
|
| ¡¡
¡ñ Characteristics
|
|
pre breakdown
region
|
normal operating
region
|
upturn
region
|
|
|
|
|
Fig 1
Voltage Current Characteristic
|
Fig 2
Electronic Characteristics
|
|
| ¡¡
¡ñ Test
conditions
|
|
Item
|
Test Methods
|
|
Operating Temperature Range
|
-40¡æ¡«+85¡æ
|
|
Storage Temperature Range
|
-40¡æ¡«+85¡æ
|
|
Varistor Voltage
|
Element Diameter¡Ü5mm Test Current
v(DC)0.1mA(V0.1mA),others
DC 1mA(V1mA)
|
|
Max. Clamping Voltage
|
Current Waveshape 8§ç20¦Ìs
|
|
Energy
|
Current input of Rectangular Wave
|
|
Max Withstanding Surge Current
|
Current Waveshape 8§ç20¦Ìs
|
|
| ¡¡
¡ñZinc oxide varistor selection
(only reference)
|
Varistor voltage
Varistor voltage should be more than the operating voltage in
over-protective circuit, the formula is shown as the following. |
| V1mA=a¡¤v/b¡¤c |
a - power Voltage ripple coefficient,
usually take 1.2
v - DC Voltage (significant value only AC power)
b - tolerance, usually take 0.85
c - ageing coefficient, usually take 0.9 |
|
The calibrated value is 1.5 times of DC voltage,
the face value should be /2
time of the calibrated value because of the peak voltage in alternating
current power.
|
| Withstanding surge current |
| In
general, withstanding
surge current is max pulse current value which determined by
test conditions such as wave-shape, amplitude and internal time, when
the amplitude decrease to 50% of the initial, it should be increased
to 2 times of the initial in order to keep the life longer,
the
surge current which is absorbed by the varistor should be less
than max withstanding surge current. |
| ¡¡
¡ñ General type
|
| General type is widely used in surge
protection for IC, diode, triac semiconductor, thyristor,
consumer, military
industry telecommunication measuring & controlling instrument
etc. |
|
general type dimensions (mm)
|
-
|
Varistor Voltage (V)
|
D max
|
d¡À0.1
|
W ¡À1.0
|
H Max
|
T Max
|
|
05
|
18-82
|
7.0
|
0.6
|
5.0
|
10.0
|
3.5
|
|
100-470
|
7.5
|
0.6
|
5.0
|
10.0
|
6.0
|
|
07
|
18-470
|
9.0
|
0.6
|
5.0
|
12.0
|
6.0
|
|
10
|
18-330
|
13.5
|
0.8
|
7.5
|
16.5
|
5.4
|
|
360-1100
|
14.0
|
0.8
|
7.5
|
17.0
|
8.5
|
|
14
|
18-330
|
17.0
|
0.8
|
7.5
|
20.0
|
5.4
|
|
|
17.5
|
0.8
|
7.5
|
20.5
|
8.5
|
|
1800
|
25.0
|
0.8
|
15.0
|
30.0
|
12.0
|
|
20
|
|
23.0
|
1.0
|
10.0
|
27.0
|
5.5
|
|
|
24.0
|
1.0
|
10.0
|
28.0
|
9.0
|
|
|
25.0
|
1.0
|
15.0
|
30.0
|
12.0
|
|
 |
|
| ¡¡
¡ñ Lightning arrester type
|
| Lightning arrester type is ideal for
semiconductor, singnalrelay, telecommunication, calibrating
equipment, communication
intermedium station, distribution board, surge absorption and
lightning-protection of all sorts of electric equipment because
of the properties, with the greatwithstanding surge current, wide
voltage range, quick responding speed and lowresidual voltage
etc. |
|
lightning arrester type dimensions (mm)
|
Part No.
|
Dimensions(mm)
|
|
D max
|
T Max
|
W ¡À1.0
|
d¡À0.1
|
|
FNR-25
|
30
|
12
|
15
|
1.2
|
|
FNR-32
|
38
|
13
|
18
|
1.5
|
|
FNR-40
|
45
|
13
|
20
|
1.5
|
|
 |
|
