PRODUCTS

Varistor

NTC Thermistor

Film Capacitor

Ceramic Capacitor

Temperature Sensor

7D KH Series

DIMENSION

Unit:mm

Series Varistor Voltage Tmax
7D 18V ~ 39V 3.9
47V ~ 68V 4.4
82V ~ 150V 3.9
180V ~ 270V 4.3
330V ~ 390V 4.9
430V ~ 560V 5.7
620V ~ 780V 6.5
820V 6.8

Note: If the foot shape is non-linear, such as curved outward, it is usually Hmax=14mm

ELECTRICAL CHARACTERISTICS

Part No. Tick if Cutting Lead is needed Lead Lengh
(Unit:mm
up to one decimal place)
Upper Category Temperature Download
1 Download
HEL 7D431KH Download
HEL 7D471KH Download
HEL 7D511KH Download
HEL 7D561KH Download
HEL 7D621KH Download
HEL 7D681KH Download
HEL 7D751KH Download
HEL 7D781KH Download
HEL 7D821KH Download

Classification according to 8/20μs Surge current

Product Level K
Coventional Version
KJ
Enhanced Version
KH
Super Enhanced Version
KX
Custom made Version
Part No. V1mA(V) Withstanding
Surge
Current
(Imax)
(A)
Impulse
Current
15 times
8/20μs
(A)
Withstanding
Surge
Current
(Imax)
(A)

Impulse
Current
15 times
8/20μs
(A)
Withstanding
Surge
Current
(Imax)
(A)
Impulse
Voltage
40 times
(1.2/50μs)
(V)
Super High Energy
5D 82~750 400 150 800 250 800 1000 Example 
14D instead of 20D

Example
HEL14D561KX reach
6KV/3KA 100 times 
7D 82~820 1200 500 1750 1000 1750 2000
10D 82~1800 2500 1500 3500 1500 3500 4000
14D 82~1800 4500 3000 6000 3000 6000 6000
20D 82~1800 6500 3000 10000 5000 10000 10000
5D 18~68 100 250 150
7D 18~68 250 500 250
10D 18~68 500 1000 500
14D 18~68 1000 2000 1000
20D 18~68 2000 3000 1000
In accordance with
International and
National Standards
IEC61051-1          GB/T10193
IEC61051-2          GB/T10194
IEC61051-2-2       GB/T10195
CSA-C22.2
UL1449  
Include the
left column, and add the following:   
IEC60950-1:2005/Annex Q   
GB4943.1-2011   GB8898-2011   
UL1449  
Include the
left column, and add the following:   
IEC61000-4-5   GB/T17626.5   
IEC61643-331   GB/T18802.331   

Remark: the Impluse voltage testing standards(1.2/50μs) with 40 times are only applicable to the products which with the varistor voltage more than 430V.

Safety regulation certification and Corresponding models

Part No. 5D 7D 10D 14D 20D
180
220
270
330
390
470
560
680
820
101
121
151
181
201
221
241
271
301
331
361
391
431
471
511
561
621
681
751 ——
781
821
911 —— ——
951
102
112
152 —— ——
182 —— ——
Remark:
CQC(GB/T10193,GB/T10194).
UL1449(VZCA2/UL,VZCA8/C-UL), 105℃,125℃,130℃.
VDE(IEC61051-1,-2,-2-2).
CSA(C22.2 No.269.5-17).
Q1 = CQC(GB4943.1,GB8898).
Q2 = VDE(IEC60950-1 Annex.Q).
The aforementioned certification specifications may be subject to change. If necessary, please promptly request the latest version from the Quality Control Department.

Derating curves & V/I characteristics

Derating Curves

The horizontal axis is the impulse time that is the width of the surge waveform, the vertical axis is the peak value of the impulse current, and the number on the line is the number of impulses.

Maximum surge current imax = f(tr,pulse train)

v/i characteristics

A=Leakage current,

B = Protection level for worst-case varistor tolerances