M
etal
O
xide
V
aristOrs
General Characteristics
Storage Temperature
Operating Surface Temperature
Operating Ambient Temperature
Maximum Voltage-Temperature
Coefficient
Insulation Resistance
Hi POT (Leads to Case, 1 min.)
Typical Response Time
Epoxy Rating
Current/Energy Derating (>85°C)
DC Leakage Current
Solderability
Failure Criteria
- 55° C to + 125° C
125° C
- 55° C to + 85° C (without derating)
< -0 .01 % / °C
1000 Megohm min .
2500 VDC (Phenolic coating 500 VDC and 2000 VDC ratings)
< 15 nsec .
94 V-0
- 2 .5 % / °C
200µA Max (at rated DC working voltage)
MIL STD 202G, Method 208H
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
–– –– ––– ––
(1)
(2)
(3)
(4)
(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 10
1
= 240
(4) Tolerance
J
= ±5%,
K
= ±10%,
M
= ±20%
J=5%, K=10%
20
E
241
K - N
–– ––
(5)
(6)
32mm – 53mm
B
5mm – 32mm (Wire Lead)
Factory Identifier
depicted with black
dot(s) in this position.
SINCERA
RoHS
Compliant -N
(as of October 2007)
SINCERA
40D511K-N
037
SINCERA
40D511K-N
037
20E241K-NB
C 037
Phenolic Coating
Rated at 500 VDC
Date Code
C=Halogen Free Coating
J=5%, K=10%
There are two options for placement
of date code for 32mm - 53mm.
(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 .)
WORLD PRODUCTS INC.
19654 Eighth Street East, Sonoma, CA 95476 | Phone (707) 996-5201 | Fax (707) 996-3380 | www.worldproducts.com
Metal Oxide Varistors | 3
Rev. 9.9
WPI [ World Produts Inc. ]
