EPCOS 3.3 mH -30 → +50% Ferrite Power Line Choke, Max SRF:10kHz, 1.8A Idc, 140mΩ Rdc 250 V ac, B82731M

B82731M Series Current-compensated D core double chokes, the Vertical version
Closed rectangular ferrite core with 2-section winding
Closed polycarbonate coil former (UL 94 V-0) without encapsulation with clearance and creepage distances ≥3 mm

High resonance frequency due to 2-section winding
Approx. 1% stray inductance for symmetrical interference suppression
Low leakage due to closed core shape
High pulse strength
Low whirring noise
Suitable for wave soldering
Applications include, Suppression of common-mode interferences; Compact switch-mode power applications and Electronic ballasts in lamps