Ferrites and accessories
E 55/28/25
Core
Series/Type: B66344
Date: June 2013
Data SheetData Sheet
EPCOS AG 2015. 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. E 55/28/25
Core B66344
Delivery mode: single units
Magnetic characteristics (per set)
1
l/A = 0.3 mm
l = 124 mm
e
2
A = 420 mm
e
2
A = 420 mm
min
3
V = 52100 mm
e
Approx. weight 256 g/set
Ungapped
Mate- A value B * P Ordering code
L e S V
rial nH mT W/set
N27 6800 +30/20% 1600 310 < 9.50 (200 mT, 25 kHz, 100 C) B66344G0000X127
N87 7300 +30/20% 1740 310 < 4.80 (100 mT, 100 kHz, 100 C) B66344G0000X187
* H = 250 A/m; f = 10 kHz; T = 100 C
Gapped
Material g A value Ordering code
L e
mm approx.
nH
N27 2.500.05 295 70 B66344G2500X127
The A value in the table applies to a core set comprising one ungapped core (dimension g = 0) and
L
one gapped core (dimension g > 0).
Calculation factors (for formulas, see E cores: general information )
Material Relationship between Calculation of saturation current
air gap A value
L
K1 (25 C) K2 (25 C) K3 (25 C) K4 (25 C) K3 (100 C) K4 (100 C)
N27 596 0.769 992 0.847 927 0.865
N87 596 0.769 950 0.796 905 0.873
Validity range: K1, K2: 0.15 mm < s < 3.50 mm
K3, K4: 220 nH < A < 2130 nH
L
Please read Cautions and warnings and
2 06/13
Important notes at the end of this document.