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Thermally Protected Varistors
18mm C Series
3-Leaded, Fuse Located on Second Lead,
E, High Energy Rating
Thermally Protected Varistors
Introduction
Features
Applications
Marking
Approvals
Part Number System		 Absolute Maximum Ratings
Soldering Profile
Varistor Application Examples
Thermal Characteristics
V-I Characteristics
Taping Specifications
Standard Bulk Packaging		 25mm Standard Series
14mm B Series
18mm B Series
20mm B Series
14mm C Series
18mm C Series
20mm C Series
34mm Series

Fuse Configuration and Dimensions | Specifications

Fuse Configuration and Dimensions

Unit: mm (inch)

Varistor Type
18mm
T max
W1 max.
W2 max.
181K
7.4 (0.29)
1.9 (0.07)
3.4 (0.13)
201K
7.8 (0.31)
2.0 (0.08)
3.5 (0.14)
221K
8.0 (0.31)
2.0 (0.08)
3.6 (0.14)
241K
8.1 (0.32)
2.1 (0.08)
3.7 (0.15)
271K
8.2 (0.32)
2.2 (0.09)
3.8 (0.15)
311K
8.4 (0.33)
2.4 (0.09)
4.0 (0.16)
361K
8.5 (0.33)
2.7 (0.11)
4.3 (0.17)
391K
8.6 (0.34)
2.9 (0.11)
4.5 (0.18)
431K
8.7 (0.34)
3.0 (0.12)
4.7 (0.19)
471K
9.0 (0.35)
3.2 (0.13)
4.9 (0.19)
511K
9.4 (0.37)
3.4 (0.13)
5.2 (0.20)
621K
10.0 (0.39)
3.9 (0.15)
5.7 (0.22)
681K
10.3 (0.41)
*4.2 (0.17)
*6.0 (0.24)
751K
10.4 (0.41)
*4.5 (0.18)
*6.4 (0.25)
821K
10.8 (0.43)
*4.9 (0.19)
*6.8 (0.27)
911K
11.3 (0.44)
*5.3 (0.21)
*7.2 (0.28)
951K
11.5 (0.45)
*5.5 (0.22)
*7.5 (0.30)
102K
11.8 (0.46)
*5.7 (0.22)
*7.8 (0.31)
122K
12.8 (0.50)
*6.9 (0.27)
*8.8 (0.35)

Series
Size
D max
H max
dø nom.
a
b
TVZ18
18mm
21.0 (0.83)
26.0 (1.02)
0.8 (0.031) for 181-681K
1.0 (0.039) for 751-122K
7.5 (0.30)
± 1.0 (0.039)
5.0 (0.20)
± 1.0 (0.039)

Note: *Bulk parts for >681 varistor voltage come standard with in-line crimp (see illustration below) for straight disk seating on PC boards. Therefore, W1 & W2 dimensions are not applicable. If required without in-line crimp, please reference “Part Number System” and add “N”.

in-lineCrimp3Lead

*NOTE: For 3 leaded 14mm, 18mm, and 20mm types with in-line crimp, monitor lead is straight. For 25mm types, monitor lead is in-line crimped.

Specifications

Standard Series Part Number
RoHS Compliant Series
Part Number
Maximum Ratings
Specifications
Maximum
Continuous Working Voltage
Maximum
Non-
Repetitive Surge
Current (8/20µs)
Maximum
Non-Repetitive
Surge
Energy
(10/1000µs)
Maximum
Clamping
Voltage at
Specified
Current (8/20µs)/80A
Nominal Voltage
at 1mA(DC) Current
Typical Capacitance
at 1KHz
VM(AC)
VM(DC)
ITM
WTM
VC
VN(DC) min.
VN(DC) max.
C
(V)
(V)
(A)
(J)
(V)
(V)
(V)
(pF)
TVZ18EC181KBS
TVZ18ECN181KBS
115
150
9000
135
320
162
198
1800
TVZ18EC201KBS
TVZ18ECN201KBS
130
170
9000
140
340
184
226
1600
TVZ18EC221KBS
TVZ18ECN221KBS
140
180
9000
150
360
200
240
1450
TVZ18EC241KBS
TVZ18ECN241KBS
150
200
9000
155
395
216
264
1300
TVZ18EC271KBS
TVZ18ECN271KBS
175
225
9000
163
455
243
297
1150
TVZ18EC311KBS
TVZ18ECN311KBS
200
230
9000
170
505
281
344
990
TVZ18EC361KBS
TVZ18ECN361KBS
230
250
9000
190
545
324
396
850
TVZ18EC391KBS
TVZ18ECN391KBS
250
320
9000
220
595
351
429
790
TVZ18EC431KBS
TVZ18ECN431KBS
275
350
9000
245
650
387
473
710
TVZ18EC471KBS
TVZ18ECN471KBS
300
385
9000
270
710
423
517
650
TVZ18EC511KBS
TVZ18ECN511KBS
320
420
9000
290
775
459
561
600
TVZ18EC621KBS
TVZ18ECN621KBS
385
505
9000
314
840
558
682
500
TVZ18EC681KBS
TVZ18ECN681KBS
420
560
9000
330
910
612
748
450
TVZ18EC751KBS
TVZ18ECN751KBS
460
615
9000
345
1025
675
825
400
TVZ18EC821KBS
TVZ18ECN821KBS
510
675
9000
355
1120
738
901
370
TVZ18EC911KBS
TVZ18ECN911KBS
550
745
9000
365
1240
819
1001
340
TVZ18EC951KBS
TVZ18ECN951KBS
575
785
9000
378
1250
856
1047
320
TVZ18EC102KBS
TVZ18ECN102KBS
625
825
9000
388
1350
900
1100
300
TVZ18EC122KBS
TVZ18ECN122KBS
750
975
9000
415
1400
1080
1320
260

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