Power line chokes
Current-compensated ring core double chokes
250 V AC, 0.4 47 mH, 0.4 2.8 A, +70 C
Series/Type: B82721K2*U*
Date: August 2017
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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. Power line chokes B82721K2*U*
Current-compensated ring core double chokes
Rated voltage 250 V AC
Rated inductance 0.4 ... 47 mH
Rated current 0.4 ... 2.8 A / +70 C
Construction
Current-compensated ring core double choke
Ferrite core wih epoxy coating (UL 94 V-0)
Plastic case (UL 94 V-0)
Potting (UL 94 V-0)
Sector winding
Features
High resonance frequency due to special winding technique
Approx. 1% stray inductance for symmetrical interference suppression
Completely potted for local reduction of pollution degree (micro-environment)
Suitable for wave soldering
1)
Plastic material approved to EN 60335-1 (VDE 0700-1) clause 30
Design complies with EN 60938-2 (VDE 0565-2)
2)
UL and ENEC (VDE) approvals
RoHS-compatible
Applications
Suppression of common-mode interferences
Switch-mode power applications
Household appliances white good)
Heating control systems
Terminals
Base material CuNi18Zn20
Layer composition Ni, Sn
Hot-dipped
Pins 0.7 u 0.7 (mm)
Lead spacing 10 u 15 (mm)
Marking
Product brand, approval signs and VDE standard number, ordering code, graphic symbol,
rated current, rated inductance, date of manufacture (YYWWD.internal ID code)
Delivery mode
Blister tray in cardboard box
1) Certified values:
Glow wire flammability index (GWFI to IEC 60695-2-12): +850 C
Glow wire ignition temperature (GWIT to IEC 60695-2-13): +775 C
Comparative tracking index (CTI to IEC 60112): 600 V
Ball pressure test (BP to IEC 60695-10-2): +190 C
2) UL approval with 300 V AC
Please read Cautions and warnings and
2 08/17
Important notes at the end of this document.