Metal core SMD power inductors with high-current ratings

August 13, 2015 // By Graham Prophet
Distributor Dengrove Electronic Components has Taiyo Yuden’s metal core SMD power inductor range in the the MDWK4040 sereis. Part of Taiyo Yuden’s MCOIL MD series, these inductors measure 4.0 x 4.0 x 2.0 mm (maximum height) and can be used as choke coils for power supply circuits.

With the optimised shape of its metal core, the MDWK4040 utilises Taiyo Yuden’s proprietary magnetic metal material and claims to achieve one of the best direct-current superposition characteristics available. 11 items in the range offer DC superposition current from of 17.0 down to 2.2A (max), nominal inductance from 0.2 to 10 µH and corresponding temperature rise current 9.2 to 1.6A (max).

Part No.

Nominal inductance [µH]

Inductance tolerance [%]

DC Resistance [mΩ] (max)

Rated current [A]

DC superposition  current

Temperature rise current

max.

typ.

max.

typ.

MDWK4040TR20NM

0.20

±30

9.8

17.0

23.0

9.2

10.0

MDWK4040TR33NM

0.33

±30

13

16.0

21.0

7.8

8.8

MDWK4040TR47NM

0.47

±30

13

10.0

15.0

7.8

8.8

MDWK4040TR68MM

0.68

±20

16

8.0

12.0

7.3

8.3

MDWK4040T1R0MM

1.0

±20

27

7.0

9.4

5.1

5.8

MDWK4040T1R5MM

1.5

±20

41

7.0

9.4

4.1

4.7

MDWK4040T2R2MM

2.2

±20

54

5.4

7.5

3.5

4.0

MDWK4040T3R3MM

3.3

±20

75

3.7

5.2

3.0

3.3

MDWK4040T4R7MM

4.7

±20

107

3.5

5.0

2.5

2.8

MDWK4040T6R8MM

6.8

±20

158

2.9

4.0

2.0

2.3

MDWK4040T100MM

10

±20

194

2.2

3.1

1.6

1.9

Dengrove Electronic Components; www.dengrove.com