B66421G0000X197 EPCOS Inc, B66421G0000X197 Datasheet - Page 2

• Manufacturer Part Number: B66421G0000X197
• Description: FERRITE CORE, HALF, EFD25, N97
• Manufacturer: EPCOS Inc

Specifications of B66421G0000X197

• Ferrite Grade: N97
• Core Size: EFD25
• Svhc: No SVHC (18-Jun-2010)
• Al Tolerance Value +: 30%
• Al Tolerance Value -: 20%
• External Depth: 9.1mm
• External Length / Height: 12.5mm
• External Width: 25mm
• Inductance Factor Al: 2100nH
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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■
■
Magnetic characteristics (per set)
Σ l/A = 0.98 mm
l
A
A
V
Approx. weight 16.6 g/set
Ungapped
Material
N87
N97
Gapped
Material
N87
The A
one gapped core (dimension g > 0).
Calculation factors (for formulas, see “E cores: general information”)
Material
N87
Validity range:
Please read Cautions and warnings and
Important notes at the end of this document.
e
e
min
e
EFD 25/13/9
Core
E core with flattened, lower center leg
for especially flat transformer design
For DC/DC converters
Delivery mode: single units
= 57 mm
= 58 mm
= 57 mm
= 3310 mm
L
value in the table applies to a core set comprising one ungapped core (dimension g = 0) and
A
nH
2000 +30/–20%
2100 +30/–20%
A
nH
160 ±10%
250 ±10%
315 ±10%
L
L
2
2
value
value
Relationship between
air gap – A
K1 (25 °C)
103
–1
3
K1, K2: 0.10 mm < s < 1.40 mm
K3, K4: 50 nH < A
L
value
K2 (25 °C)
– 0.734
µ
1560
1640
µ
125
195
246
e
e
L
P
W/set
< 1.8 (200 mT, 100 kHz, 100 °C)
< 1.5 (200 mT, 100 kHz, 100 °C)
< 410 nH
V
Calculation of saturation current
K3 (25 °C)
154
2
09/06
g
approx. mm
0.55
0.30
0.22
K4 (25 °C)
– 0.796
K3 (100 °C) K4 (100 °C)
138
Ordering code
B66421G0000X187
B66421G0000X197
Ordering code
B66421U0160K187
B66421U0250K187
B66421U0315K187
– 0.873
B66421