2

Technical Data 4355

Effective June 2017

FP1308R

High frequency, high current power inductors

www.eaton.com/electronics

Packaging information - mm

Dimensions- mm

2 Full Load Inductance (FLL) Test Parameters: 100kHz, 1.0Vrms, Isat1.

3 Irms: DC current for an approximate temperature rise of 40°C without core loss. Derating is

necessary for AC currents. PCB pad layout, trace thickness and width, air-flow and proximity of other heat

generating components will affect the temperature rise. It is recommended the part temperature not exceed

125°C under worst case operating conditions verified in the end application.

4 Isat: Peak current for approximately 20% rolloff at +25°C.

5 Isat2: Peak current for approximately 20% rolloff at +125°C.

6 K-factor: Used to determine Bp-p for core loss (see graph). Bp-p = K * L * ΔI * 10

-3. B

p-p (Gauss),

K: (K-factor from table), L: (inductance in nH),

ΔI (peak-to-peak ripple current in amps).

7 Part Number Definition: FP1308Rx-Rxx-R

• FP1308 = Product code and size

• Rx = DCR indicator

• Rxx = Inductance value in

μH, R = decimal point.

• “-R” suffix = RoHS compliant

Product Specifications

Part

DCR (mΩ)

± 10% (nH)

(nH)

(Amps)

@ 25°C (Amps)

@ 125°C (Amps)

@ 20°C

R1 Version

FP1308R1-R11-R

110

79

120

105

233

FP1308R1-R21-R

210

152

80

68

233

FP1308R1-R26-R

260

187

57

64

52

0.32 ± 9.4%

233

FP1308R1-R32-R

320

230

52

40

233

FP1308R1-R44-R

440

317

37

28

233

R2 Version

FP1308R2-R11-R

110

79

120

105

233

FP1308R2-R21-R

210

152

80

68

233

FP1308R2-R26-R

260

187

45

64

52

0.53 ± 10%

233

FP1308R2-R32-R

320

230

52

40

233

FP1308R2-R44-R

440

317

37

28

233

R3 Version

FP1308R3-R11-R

110

79

120

105

233

FP1308R3-R21-R

210

152

80

68

233

FP1308R3-R26-R

260

187

68

64

52

0.18 ± 20%

233

FP1308R3-R32-R

320

230

52

40

233

FP1308R3-R44-R

440

317

37

28

233

All soldering surfaces to be coplanar within 0.1016mm.

Part Marking: FP1308R (Rx = DRC indicator)

Rxx = Inductance value in

μH. (R = Decimal point).

wwllyy = Date code

R = Revision level

2

a

The nominal DCR is measured from point “a” to point “b”

Top View

Side View

Bottom View

Recom m ended Pad Layout

Schem atic

5.08

8.0

12.7 m ax

±0.15

m ax

7.62

b

1

1

2.54

3.18

1

±0.3

13.4

7.5

7.2

2

1308Rx

m ax

typ.

Rxx

wwllyy R

2

4.0

8.2

Supplied in tape-and-reel packaging, 400 parts per reel, 13” diameter reel.

1.5 dia

2.0

1.5 dia

min

A

Section A-A

1.75

1

11.5

24.0

13.9

1308Rx

±0.3

Rxx

wwllyy R

2

13.2

A

20.0

User direction of feed