EPCOS B66421-G-X1 Datasheet

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EFD 25/13/9

■ E core with flattened, lower center leg

for especially flat transformer design

■ For DC/DC converters

■ EFD cores are supplied as single units

Magnetic characteristics (per set)

Σl/A = 0,98 mm

–1

le= 57 mm

= 58 mm

= 57 mm

min

Ve= 3 310 mm

Approx. weight 16,6 g/set

Ungapped

B66421Core

Material A

value

L1min

W/set

N87 2000 + 30/– 20 % 1560 1280 < 1,80

Ordering code

B66421-G-X187

(200 mT, 100 kHz, 100 °C)

Gapped

Material A

N87 160

The A

value

Ordering code

approx. mm

± 10 % 125 0,55 B66421-U160-K187

± 10 % 195 0,30 B66421-U250-K187

250

± 10 % 246 0,22 B66421-U315-K187

315

value in the table applies to a core set comprising one ungapped core (dimension g = 0) and

one gapped core (dimension g > 0).

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

Material Relationship between

air gap – A

value

Calculation of saturation current

K1 (25 °C) K2 (25 °C) K3 (25 °C) K4 (25 °C) K3 (100 °C) K4 (100 °C)

N87 103 – 0,734 154 – 0,796 138 – 0,873

Validity range: K1, K2: 0,10 mm < s < 1,40 mm

K3, K4: 50 nH < A

< 410 nH

512 08/01

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EFD 25/13/9

B66422Accessories

Coil former

Material: GFR thermosetting plastic; UL 94 V-0, insulation class to IEC 60085:

B66422-B: F max.operating temperature 155 °C; color code green

B66422-W: H max.operating temperature 180 °C; color code black Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3,5 s Winding: see “Processing Notes”, page 157 Squared pins

Yoke

Material: Stainless spring steel (0,4 mm)

Coil former Ordering code Sections A

µΩ

value

Pins

1 40,7 50 42,3 10 B66422-B1010-D1

B66422-W1010-D1

Yoke (ordering code per piece, 2 are required) B66422-B2000

Coil former Yoke

25±0,2

13,1 0,2

12345

Mounting holes

Montagelochung

10 6

ø 1,3+0,1

View A

Ansicht A

6,15

1,21,2

Marking of pin 1

Markierung für Stift 1

12,9 max.

1,7

3,5±0,2

109876

Duroplast

Thermosetting plastic

18 0,25

11,7+0,2

0,6

CuSn6, verzinnt

CuSn6, tinned

26 0,3

5,5

22,5

4 x 5 = 20

0,218

16,4 min.

12 0,2

0,11,6

6,9

FEK0330-M

25,6

8,3 max.

23,7 min.

FEK0273-Z

513 08/01

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Herausgegeben von EPCOS AG Marketing Kommunikation, Postfach 80 17 09, 81617 München, DEUTSCHLAND

Mit den Angaben in dieser Broschüre werden die Bauelemente spezifiziert, keine Eigenschaften zugesichert. Bestellungen unterliegen den vom ZVEI empfohlenen Allgemeinen Lieferbedingungen für Erzeugnisse und Leistungen der Elektroindustrie, soweit nichts anderes vereinbart wird.

Diese Broschüre ersetzt die vorige Ausgabe.

Fragen über Technik, Preise und Liefermöglichkeiten richten Sie bitte an den Ihnen nächstgele- genen Vertrieb der EPCOS AG oder an unsere Vertriebsgesellschaften im Ausland.

Bauelemente können aufgrund technischer Erfordernisse Gefahrstoffe enthalten. Auskünfte darüber bitten wir unter Angabe des betreffenden Typs ebenfalls über die zuständige Vertriebsgesellschaft einzuholen.

Published by EPCOS AG Marketing Communications, P.O. Box 80 17 09, 81617 Munich, GERMANY

The information contained in this brochure describes the type of component and shall not be considered as guaranteed characteristics. Purchase orders are subject to the General Conditions for the Supply of Products and Services of the Electrical and Electronics Industry recommended by the ZVEI (German Electrical and Electronic Manufacturers’ Association), unless otherwise agreed.

This brochure replaces the previous edition.

For questions on technology, prices and delivery please contact the Sales Offices of EPCOS AG or the international Representatives.

Due to technical requirements components may contain dangerous substances. For information on the type in question please also contact one of our Sales Offices.