VDR Varistor
20D SERIES
METAL OXIDE VARISTOR – 20D SERIES
* Wide operating voltage (V1mA) range from 18V to 1800V.
* Fast responding to transient over-voltage.
* Large absorbing transient energy capability.
* Low clamping ratio and no follow-on current.
* Meets MSL level 1, per J-STD-020
* Safety number : CUL- E317616
CQC-12001076476
VDE- 40028836
ISO9001-2018
FEATURES
*Transistor, Diode, IC, Thyristor or Triac semiconductor protection.
* Surge protection in consumer electronics.
* Surge protection in industrial electronics.
* Surge protection in electronic home appliances, gas and petroleum appliances.
* Relay and electromagnetic valve surge absorption.
*Operating Temperature:
*Storage Temperature:
*Working Surface Temperature:
*Insulation Resistance:
*Coating (Epoxy Resin):
*Coating:
APPLICATION
General Characteristics Definition
(-40
℃
~ +85
℃
)
(-40
o
C ~ +125
o
C)
+115
o
C
> 100M
Ω
&
( -40
℃
~ +125
℃)
Flame-Retardant to UL 94 V-0
Material
Epoxy Resin
The Copper Wire
Silver
Solder
Zinc Oxide
*Lead Wire:
*Electrode:
*Disk:
PART NUMBER CODE
VDR
Brand Mark
□□
D
□□□
K
□
Sapce:Straight 85℃
□□
H:125℃
Element Diameter
C:Crimped , Y:Y kink
Type: D: Disk , S: Square
I:Inner,Tor G :Plaster
Varistor Voltage
Tolerance : K±10%, L±15%
Lead Form :
Short leg : NO :
E: 4KV2KA S:6KV/3KA Y:10KV/5KA
J:High Surge & High Energy
PH=Ultra Surge
Taping : TA : Ammo, TR : Reel
□.□
□
=ABCDEF Times
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Reliability Test
Mechanical Ratings
Test Parameter Test Condition / Description
VDR Varistor
20D SERIES
Performance
Requirements
Diameter
Loading
1.0 Kg
1.0 Kg
2.0 Kg
Loading
0.5 Kg
0.5 Kg
1.0 Kg
No visible damage
△VB/VB%≦±5%
No visible damage
No visible damage
0.6mm
0.8mm
1.0mm
Diameter
0.6mm
0.8mm
1.0mm
Terminal Pull
Strength
After gradually applying the load specified below and keeping
the unit fixed for ten seconds, the terminal shall be visually
examined for any damage.
The unit shall be secured with its terminal kept vertical and the
weight specified below be applied in the axial direction. The
Terminal Bending terminal shall gradually be bent by 90° in one direction, then
Strength
90° in the opposite direction, and again back to the original
position. The damage of the terminal shall be visually
examined.
Vibration
The Specimen shall be vibrated by its lead wires with a total amplitude of 1.5㎜ and a
varying frequency of 10~55~10HZ(each minutes) for a period of 2 hours respectively in
each X,Yand Z directions.
After dipping the terminal to depth of approximately 3㎜ from the specimen in a
soldering bath of 260℃ for 10±1(D5: 5±1) seconds. Thereafter the terminal shall be
visually examined.
After preheating the specimen, the specimen shall be completely immersed into a
soldering bath having a temperature of 260±5℃ for 10±1 (D5: 5±1) seconds or iron of
400±5℃ for 3±0.5 seconds. There after the change of Vb and mechanical damage shall
be examined.
Soldering-
solderability
Soldering-
Resistance to
Solder Heat
Terminations shall
be uniformly tinned
No visible damage
△VB/VB%≦±5%
ENVIRONMENTAL RATINGS
The specimen shall be applied continuously the maximum allowable voltage at the
specified conditions for specified period and then stored at room temperature and
Dry Heat Loading normal humidity over 2 hours. Thereafter, the change of Vb and mechanical damage
shall be examined.
Ambient temp：125±2℃ ;
Period：1000±24hours.
High Temperature In a drying oven without load.
Storage
Ambient temp：125±2℃ ; period：1000±24hours
The specimen shall be applied continuously the maximum allowable voltage at the
specified conditions for specified period and then stored at room temperature and
normal humidity over 2 hours. Thereafter, the change of Vb and mechanical damage
shall be examined.
Ambient condition：40±2℃ , 90 to 95%R.H. ; period：1000±24 hours
Step
Temperature
Cycle
Condition the specimen to each temperature form step 1
to step 4 in this order for the period shown in the table
of specifications. The change of Vb and mechanical
damage shall be examined after 2 hours.
1
2
3
4
Surge Lifetime
Rating
Voltage Proof
Temp
o
C
-40+3 C
Room Temp
85+2 C
Room Temp
o
o
△VB/VB%≦±10%
△VB/VB%≦±5%
Damp Heat
Loading
△VB/VB%≦±10%
Period
30 min.
15 min.
30 min.
15 min.
No visible damage
△VB/VB%≦±10%
No Breakdown
No visible damage
△VB/VB%≦±10%
The change of Vb shall be measured after the impulse listed below is applied 10,000
times continuously with the interval of ten seconds at room temperature.
Voltage：2500VAC
Leakage Current≦0.5mA
Time：60 Seconds
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