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What is 18D621K?

This electronic component, produced by the manufacturer "TYEE", performs the same function as "Varistor".


18D621K Datasheet PDF - TYEE

Part Number 18D621K
Description Varistor
Manufacturers TYEE 
Logo TYEE Logo 


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Varistor Specification
TYEE Varistor
Varistor are voltage dependent, nonlinear device which have an
electrical behavior similar to back-to-back zener diodes.
TYEE series zinc oxide varistor are nonlinear resistors, consisting
main of zinc oxide and several kinds of metal oxide additive.
They are bilateral and symmetrical V-I characteristics curve and
unparalleled large peak current capability are used for absorption
of transient voltage, suppression of pulse noise and circuit
voltage stabilization.
Applications
Features
Surge Protection in consumer electronics
Fast response
-- industrial electronics
Excellent voltage ratio
-- telephone and telecommunication systems High stabilization for circuit voltage
-- automobile equipments
Unparalleled absorption for transient voltage
-- measuring and controller systems
characteristics
-- electronic home appliances
Bilateral and symmetrical V-I Characteristics
-- gas and petroleum appliances
curve
Absorption of switching surge from various
kinds of relays and electro-magnetic valves.
Electrostatic discharge an spike noise suppression.
Protection of various kinds of transistors, diodes, ICs,
thyristors, triac semiconductors, and etc.
Automobile control system such as transistorized ignition
system and electronic fuel injection system, and etc.
Related Standards
UL1414, UL1449(2nd Edition), CSA, VDE
Explanation of Part Numbers
05
D 220
K
Element Dia.
05 ψ5.0mm
07 ψ7.0mm
10 ψ10.0mm
14 ψ14.0mm
18 ψ18.0mm
20 ψ20.0mm
Type
D
Varistor Voltage
Examples
220
22 × 100 = 22V
221
22 × 101 = 220V
Tolerance
K:±10%
or customer
special
requirement
TYEE Products Inc.
http://www.tyeeusa.com
Page : 1/15

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18D621K equivalent
14D Series
Part No.
Maximum
Varistor
Clamping Voltage Maximum Maximum Rated Typical
Allowable
Voltage
@ Test Current Energy Peak Current Power Capacitance
Device
Voltage
(@1mA)
(8/20µs)
(J) (8/20µs)
(@1KHz) Standards
Marking ACrms(V) DC(V) Min. Vb(Vdc) Max.
14D180K 11 14 14.4 18 21.6
14D220K 14 18 18.7 22 26.0
14D270K 17 22 23.0 27 31.1
14D330K 20 26 29.5 33 36.5
14D390K
25
31 35 39
43
14D470K
30
38 42 47
52
14D560K
35
45 50 56
62
14D680K
40
56 61 68
75
14D820K
50
65 74 82
90
14D101K 60 85 90 100 110
14D121K
75 100 108 120 132
14D151K
95 125 135 150 165
14D181K
115 150 162 180 198
14D201K
130 170 185 200 225
14D221K
140 180 198 220 242
14D241K
150 200 216 240 264
14D271K
175 225 247 270 303
14D301K
195 250 270 300 330
14D331K
210 275 297 330 363
14D361K
230 300 324 360 396
14D391K
250 320 351 390 429
14D431K
275 350 387 430 473
14D471K
300 385 423 470 517
14D511K
320 410 459 510 561
14D561K
350 460 504 560 616
14D621K
385 505 558 620 682
14D681K
420 560 612 680 748
14D751K
460 615 675 750 825
14D781K
485 640 702 780 858
14D821K
510 670 738 820 902
14D911K
550 745 819 910 1001
14D102K
625 825 900 1000 1100
14D112K
680 895 990 1100 1210
14D182K
1000 1465 1620 1800 1980
Related Standards
Vc(V)
39
43
53
65
77
93
110
135
135
165
200
250
300
340
360
395
455
500
550
595
650
710
775
845
915
1025
1120
1240
1290
1355
1500
1650
1815
2970
Ip(A)
10
10
10
10
10
10
10
10
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
10/1000µs
4.0
5.0
6.0
7.5
8.6
10.0
11.0
14.0
22.0
28.0
32.0
40.0
50.0
57.0
60.0
63.0
70.0
73.0
93.0
93.0
100.0
115.0
125.0
125.0
125.0
125.0
130.0
143.0
148.0
157.0
175.0
190.0
213.0
337.0
(A)
1000
1000
1000
1000
1000
1000
1000
1000
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
(W) (pF)
0.1 25000
0.1 20000
0.1 16000
0.1 12200
0.1 7000
0.1 6750
0.1 6500
0.1 5500
0.6 4300 ☆ ◎
0.6 3500 ☆ ◎
0.6 2500 ☆ ◎
0.6 2100 ☆ ◎
0.6 1250 ☆ ◎
0.6 1150 ☆ △ ※ ◎
0.6 1100 ☆ △ ※ ◎
0.6 1050 ☆ △ ※ ◎
0.6 1000 ☆ △ ※ ◎
0.6 900 ☆ △ ※ ◎
0.6 850 ☆ △ ※ ◎
0.6 800 ☆ △ ※ ◎
0.6 800 ☆ △ ※ ◎
0.6 650 ☆ △ ※ ◎
0.6 550 ☆ △ ※ ◎
0.6 450 ☆ △ ※ ◎
0.6 400 ☆ △ ※ ◎
0.6 350 ☆ △ ※ ◎
0.6 350 ☆ △ ※ ◎
0.6 330 ☆ △ ※ ◎
0.6 330 ☆ △ ※ ◎
0.6 330 ☆ △ ※ ◎
0.6 300 ☆ △ ※ ◎
0.6 300 ☆ △ ※ ◎
0.6 200 ☆ ※ ◎
0.6 150
Standard No.
UL 1414
UL 1449(2nd Edition)
CSA
VDE
Title
Across-The-Line Transient Voltage
Accessories and Parts
Components
Surge Suppressors for Electronic Products
Varistors for use in
Electronic equipment
File No.
Symbols
E165143
E150709
LR109736-1
21557-4790-001
TYEE Products Inc.
http://www.tyeeusa.com/
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Featured Datasheets

Part NumberDescriptionMFRS
18D621KThe function is Varistor. TYEETYEE

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