Metal Oxide VaristOrs
General Characteristics
Storage Temperature
- 55° C to + 125° C
Operating Surface Temperature
Operating Ambient Temperature
125° C
- 55° C to + 85° C (without derating)
Maximum Voltage-Temperature
Coefficient
< -0ꢀ01 % / °C
Insulation Resistance
Hi POT (Leads to Case, 1 min.)
Typical Response Time
Epoxy Rating
1000 Megohm minꢀ
2500 VDC (Phenolic coating 500 VDC and 2000 VDC ratings)
< 15 nsecꢀ
94 V-0
Current/Energy Derating (>85°C)
DC Leakage Current
Solderability
- 2ꢀ5 % / °C
200µA Max (at rated DC working voltage)
MIL STD 202G, Method 208H
Voltage change 10% from initially measured Varistor Voltageꢀ When
determining if varistor is within aforementioned criteria the same temperature
must be observed as was used for initial Varistor Voltage measurementsꢀ
Failure Criteria
Part Marking
Example: 20E241K-VB
20
E
241 K - N B
–– –– ––– ––
–– ––
(1) (2)
(3)
(4)
(5) (6)
(1) Disk Diameter
5mm – 32mm (Wire Lead)
32mm – 53mm
5 = 5mm, 7 = 7mm, 10 = 10mm,
14 = 14mm, 18 = 18mm, 20 = 20mm,
25 = 25mm, 32 = 32mm, 34 = 34mm,
40 = 40mm, 53 = 53mm
Factory Identifier
depicted with black
dot(s) in this position.
SINCERA
40D511K-N
RoHS
SINCERA
40D511K-N
Compliant -N
SINCERA
(as of October 2007)
20E241K-NB
J=5%, K=10%
037
(2) Type
Phenolic Coating
Rated at 500 VDC
037
D = Standard
E = High Energy
R = (applicable only for 34mm Types)
C037
Date Code
C=Halogen Free Coating
(3) Varistor Voltage
J=5%, K=10%
241 = 24 x 101 = 240
There are two options for placement
of date code for 32mm - 53mm.
(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 VDCꢀ Phenolic coating rated at 2000 VDC requires no markingꢀ
Date Code
037 = First digit represents year (0 = 2010)ꢀ Second and third digits represent the week of the yearꢀ
This new date code system was implemented from 9/15/05ꢀ
NOTE: Parts will be marked SINCERAꢀ (This is the brand nameꢀ)
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
WPI [ World Produts Inc. ]
