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18E431K Datasheet(PDF) 5 Page - World Produts Inc.

Part # 18E431K
Description  Metal Oxide Varistors
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Manufacturer  WPI [World Produts Inc.]
Direct Link  http://www.worldproducts.com
Logo WPI - World Produts Inc.

18E431K Datasheet(HTML) 5 Page - World Produts Inc.

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Metal Oxide VaristOrs
WORLD PRODUCTS INC. 19654 Eighth Street East, Sonoma, CA 95476 | Phone (707) 996-5201 | Fax (707) 996-3380 | www.worldproducts.com
Rev. 9.9
Metal Oxide Varistors | 3
General Characteristics
Storage Temperature
- 55° C to + 125° C
Operating Surface Temperature
125° C
Operating Ambient Temperature
- 55° C to + 85° C (without derating)
Maximum Voltage-Temperature
Coefficient
< -0 .01 % / °C
Insulation Resistance
1000 Megohm min .
Hi POT (Leads to Case, 1 min.)
2500 VDC (Phenolic coating 500 VDC and 2000 VDC ratings)
Typical Response Time
< 15 nsec .
Epoxy Rating
94 V-0
Current/Energy Derating (>85°C)
- 2 .5 % / °C
DC Leakage Current
200µA Max (at rated DC working voltage)
Solderability
MIL STD 202G, Method 208H
Failure Criteria
Voltage change ± 10% from initially measured Varistor Voltage . When
determining if varistor is within aforementioned criteria the same temperature
must be observed as was used for initial Varistor Voltage measurements .
Part Marking
Example: 20E241K-VB
20
E
241
K - N B
–– –– ––– ––
–– ––
(1)
(2)
(3)
(4)
(5) (6)
(1) Disk Diameter
5 = 5mm, 7 = 7mm, 10 = 10mm,
14 = 14mm, 18 = 18mm, 20 = 20mm,
25 = 25mm, 32 = 32mm, 34 = 34mm,
40 = 40mm, 53 = 53mm
(2) Type
D = Standard
E = High Energy
R = (applicable only for 34mm Types)
(3) Varistor Voltage
241 = 24 x 101 = 240
(4) Tolerance
J = ±5%, K = ±10%, M = ±20%
(5) N = RoHs Compliant Series (as of October 2007 forward, per Date Code)
(6) B = Phenolic coating rated at 500 VDC . Phenolic coating rated at 2000 VDC requires no marking .
Date Code
037 = First digit represents year (0 = 2010) . Second and third digits represent the week of the year.
This new date code system was implemented from 9/15/05 .
NOTE: Parts will be marked SINCERA . (This is the brand name .)
SINCERA
40D511K-N
J=5%, K=10%
C=Halogen Free Coating
RoHS
Compliant -N
(as of October 2007)
Phenolic Coating
Rated at 500 VDC
SINCERA
20E241K-NB
037
037
5mm – 32mm (Wire Lead)
32mm – 53mm
Date Code
Factory Identifier
depicted with black
dot(s) in this position.
SINCERA
40D511K-N
037
There are two options for placement
of date code for 32mm - 53mm.
C
J=5%, K=10%


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