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7D471K Datasheet(PDF) 5 Page - World Produts Inc. |
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7D471K Datasheet(HTML) 5 Page - World Produts Inc. |
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5 / 65 page  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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