ThermoFuse Varistor
Series/Type: NT20*
Ordering code: B72220***
Date: 2017-05-15
Version: a
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Identification/Classification 1 ThermoFuse Varistor
(header 1 + top left header bar):
Identification/Classification 2
(header 2 + bottom left header bar):
Ordering code: (top right header bar) B72220***
Series/Type: (top right header bar) NT20*
Preliminary data (optional):
Department:
PPD VAR PD
Date: 2017-05-15
Version: a
Prepared by: Rongguang Zhang
Release signed PD: Dr. Wen Yang
Release signed QS: Mac Gao
Release signed PT: Levi Li
Modifications/Remarks: New issue
EPCOS AG 2017. Reproduction, publication and dissemination of this publication, enclosures hereto and the information
contained therein without EPCOS' prior express consent is prohibited.
EPCOS AG is a TDK Group Company.
ThermoFuse Varistor B72220***
NT20*
Construction
Round varistor element, leaded
Coating: epoxy resin, flame-retardant to UL 94 V-0
Terminals: tinned copper wire, metal compound wire
Features
Wide operating voltage range 130 750VRMS
Self-protected under abnormal overvoltage conditions
High-energy AdvanceD series E2
Applications
Inverters in solar power systems Houshold appliances
Power supply units
Inverters in solar power systems
Lighting applications
Communication and data systems
Transient voltage surge suppressors (TVSS)
Electronic metering
General technical data
Climatic category to IEC 60068-1 40/85/56
Operating temperature -40+85 C
Storage temperature -40... +85 C
Electric strength 2.5 kVRMS
Insulation resistance
M
100
Response time
ns
< 25
Nomenclature
NT = Series designation
20 = Rated disk diameter (mm)
K = Tolerance of V at 1 mA: 10%
V
*** = Max. AC voltage
E2 = Energy absorption characteristics, AdvanceD series
S5 = Crimp design S5
K4 = 2 pins version
PPD VAR PD 2017-05-15
Please read Cautions and warnings and Page 2 of 16
Important notes at the end of this document.