US designation E 21

Magnetic characteristics (per set)

= 77 mm

Approx. weight 58 g/set

Ungapped

Gapped

one gapped core (dimension g > 0).

Calculation factors (for formulas, see “E cores: general information”, page 382)

Validity range:

K1, K2: 0,10 mm < s < 2,50 mm

Material

nH

nH

W/set

Ordering code

N27

3800 + 30/– 20 % 1560 3050

< 2,15

(200 mT, 25 kHz, 100 °C)

B66381-G-X127

N72

4600 + 30/– 20 % 1900 3150

< 1,12

(200 mT, 25 kHz, 100 °C)

B66381-G-X172

Material

g

mm

nH

Ordering code

N27

0,50

± 0,05

411

166

B66381-G500-X127

Material

Relationship between

Calculation of saturation current

K1 (25 °C)

K2 (25 °C)

K3 (25 °C)

K4 (25 °C)

K3 (100 °C) K4 (100 °C)

N27

239

– 0,782

378

– 0,847

351

– 0,865

B66381

Core

E 40/16/12