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ELECTRONICS
Circuit Protection
System
Metal
Oxide
Varistors
25Dmm Series
Specifications are subject to change without notice.
Please refer to http://www.ruilon.com for current information.

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Metal Oxide Varistors - 25Dmm Series
Features
1. Wide operating voltage (V1mA) range from 8V to 1800V.
2. Fast responding to transient over-voltage.
3. Large absorbing transient energy capability.
4. Low clamping ratio and no following-on current.
General Information
The MOV-25DxxxK Series of 25mm radial leaded varistor devices protects against overvoltage transients such as lightning,
power contact and power induction. The metal oxide varistors offer a choice of varistor voltages from 18 V to 1800 V and Vrms
voltages from 11 V to 1000 V. The devices have a high current handling, high energy absorption capability and fast response
times to protect against transient faults up to rated limits.
General Characteristics
No Radioactive Material Storage Temperature: -55ºC to +125ºC
Operating Temperature: -55ºC to +85ºC
Body: Nickel Plated
Leads: Surface-mount, Axial Devices: Tin Plated
Devices with No Leads: Nickel Plated
Product Name
2 5D4 7 1K
Disc Diameter
25=25MM
Type
D: Disk
S: Square
Nominal Varistor Voltage
471=47*101V
Varistor Voltage
Tolerance
K = 10 %
Circuit Protection
System
Specifications are subject to change without notice.
Please refer to http://www.ruilon.com for current information. Page:1

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Metal Oxide Varistors - 25Dmm Series
Electriacl Characteristics
Type Number
Maximum
Allowable
Voltage
Varistor Voltage
Maximum
Clamping
Voltage
Withstanding Maximum Energy
Surge Current (10/1000μs)
Typical
Capacitance
(Reference)
Standard
25D180K
25D220K
25D270K
25K330K
25D390K
25D470K
25D560K
25D680K
25D820K
25D101K
25D121K
25D151K
25D181K
25D201K
25D221K
25D241K
25D271K
25D301K
25D331K
25D361K
25D391K
25D431K
25D471K
25D511K
25D561K
25D621K
25D681K
25D751K
25D781K
25D821K
25D911K
25D102K
25D112K
25D122K
25D182K
High Surge
25D180KJ
25D220KJ
25D270KJ
25K330KJ
25D390KJ
25D470KJ
25D560KJ
25D680KJ
25D820KJ
25D101KJ
25D121KJ
25D151KJ
25D181KJ
25D201KJ
25D221KJ
25D241KJ
25D271KJ
25D301KJ
25D331KJ
25D361KJ
25D391KJ
25D431KJ
25D471KJ
25D511KJ
25D561KJ
25D621KJ
25D681KJ
25D751KJ
25D781KJ
25D821KJ
25D911KJ
25D102KJ
25D112KJ
25D122KJ
25D182KJ
VAC(V)
11
14
17
20
25
30
35
40
50
60
75
95
115
130
140
150
175
190
210
230
250
275
300
320
350
385
420
460
485
510
550
625
680
750
1000
VDC(V)
14
18
22
26
31
38
45
56
65
85
100
125
150
170
180
200
225
250
275
300
320
350
385
415
460
505
560
615
640
670
745
825
895
990
1465
V1mA(V)
18(15~21.6)
22(19.5~26)
27(24~30)
33(29.5~36.5)
39(35~43)
47(42~54)
56(50~62)
68(61~75)
82(74~90)
100(90~110)
120(108~132)
150(135~165)
180(162~198)
200(180~220)
220(198~242)
240(216~264)
270(243~297)
300(270~330)
330(297~363)
360(324~396)
390(351~429)
430(387~473)
470(423~517)
510(459~561)
560(504~616)
620(558~682)
680(612~748)
750(675~825)
780(702~858)
820(738~902)
910(819~1001)
1000(900~1100)
1100(990~1210)
1200(1080_1320)
1800(1620~1980)
IP(A)
30
30
30
30
30
30
30
30
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
VC(V)
36
43
53
65
77
93
100
135
135
165
200
250
300
340
360
395
455
500
550
595
650
710
775
845
925
1025
1120
1240
1290
1355
1500
1650
1815
1980
2970
I(A)
4500
4500
4500
4500
4500
4500
4500
4500
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
15000
(J) @1KHz(pf)
20 45000
25 29000
30 26500
35 18000
40 13500
50 11500
60 10500
70 9050
80 7700
100 6300
120 5200
160 4300
175 3500
190 3200
200 2900
220 2650
255 2400
275 2100
300 1900
330 1750
360 1600
380 1500
400 1400
420 1250
440 1150
460 1050
450 950
510 850
530 800
570 700
620 650
685 600
770 550
850 500
970 450
Circuit Protection
System
Specifications are subject to change without notice.
Please refer to http://www.ruilon.com for current information. Page:2

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Metal Oxide Varistors - 25Dmm Series
Current Energy and Power Dissipation Ratings
Should transients occur in rapid succession, the average power dissipation is the energy (watt-seconds) per pulse times
the number of pulses per second. The power so developed must be within the specifications shown on the Device Ratings
and Specifications Table for the specific device. The operating values of a MOV need to be derated at high temperatures as
shown above. Because varistors only dissipate a relatively small amount of average power they are not suitable for repetitive
applications that involve substantial amounts of average power dissipation.
Figure 1A - Power Derating for Epoxy Coated
100
90
80
70
60
50
40
30
20
10
0
-55 50 60 70 80 90 100 110 120 130 140 150
AMBIENTTEMPERATURE ( oC)
Figure 1B - Power Derating for Pholenic Coated
100
90
80
70
60
50
40
30
20
10
0
-55 50 60 70 80 90 100 110 120 130 140 150
AMBIENTTEMPERATURE ( oC)
Peak Pulse Current Test Waveform
100
90
50
10
O1
Figure 2
T
T1
T2
Packaging
Part Number
25D
Component
Package
25.0
TIME
Quantity
200
01
T1
T2
Example
20µ
1
2
µs Current Waveform:
Packaging
Option
BOX
Packaging Specification
400PCS
Circuit Protection
System
Specifications are subject to change without notice.
Please refer to http://www.ruilon.com for current information. Page:3

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Structures and DiMmeentasiloOnsxide Varistors - 25Dmm Series
TVA 25 Type
GKGE
BKBL
Unit:mm
QAFE
QBOE
QBSE
Marking
QCDE
QCDD
QCFE
Marking
Note 1: T is the thickness of the product.
Note 2: The specifications of thickness are available upon request.
Circuit Protection
System
Specifications are subject to change without notice.
Please refer to http://www.ruilon.com for current information. Page:4