Bourns Fixed Inductors 2,031

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Part RoHS Manufacturer Inductor Type Inductor Application No. of Terminals Package Style (Meter) Shielded Surface Mount Lead Diameter Minimum Quality Factor (at L-nom) Lead Spacing Minimum Operating Temperature Terminal Finish Self Resonance Frequency Terminal Placement DC Resistance No. of Functions Lead Length Core Material Test Frequency Package Height Case or Size Code Manufacturer Series Special Feature Construction Tolerance Packing Method Package Length JESD-609 Code Shape or Size Description Series Terminal Shape Nominal Inductance (L) Package Diameter Reference Standard Package Width Maximum Operating Temperature Maximum Rated Current

SRR5028-820Y

Bourns

General Purpose Inductor

Power Inductor

2

SMT

Yes

Yes

-40 °C (-40 °F)

Silver Nickel Tin

9 MHz

Dual Ended

430 mΩ

1

Ferrite

100 kHz

0.11 in (2.8 mm)

2323

Rectangular

30 %

Tape and Reel, Embossed, 7 in

0.228 in (5.8 mm)

e2

Rectangular Package

One Surface

82 μH

0.228 in (5.8 mm)

125 °C (257 °F)

520 mA

SRR6038-270Y

Bourns

General Purpose Inductor

Power Inductor

2

SMT

Yes

Yes

-40 °C (-40 °F)

Silver Nickel Tin

12.5 MHz

Dual Ended

109 mΩ

1

Ferrite

100 kHz

0.15 in (3.8 mm)

2727

Rectangular

30 %

Tape and Reel, Embossed, 13 in

0.268 in (6.8 mm)

e2

Rectangular Package

One Surface

27 μH

0.268 in (6.8 mm)

125 °C (257 °F)

1.2 A

SRR6603-681ML

Bourns

General Purpose Inductor

Power Inductor

2

SMT

Yes

Yes

-55 °C (-67 °F)

Tin Copper Silver

3 MHz

Dual Ended

2.2 Ω

1

Ferrite

100 kHz

0.118 in (3 mm)

2617

Rectangular

20 %

Tape and Reel, Embossed, 7 in

0.26 in (6.6 mm)

Rectangular Package

Wraparound

680 μH

0.173 in (4.4 mm)

125 °C (257 °F)

180 mA

SRR7032-331M

Bourns

General Purpose Inductor

Power Inductor

2

SMT

Yes

Yes

-40 °C (-40 °F)

Tin Over Nickel

6.1 MHz

Dual Ended

1.9 Ω

1

Ferrite

1 kHz

0.126 in (3.2 mm)

2828

Rectangular

20 %

Tape and Reel, Embossed, 13 in

0.276 in (7 mm)

e3

Rectangular Package

Wraparound

330 μH

0.276 in (7 mm)

125 °C (257 °F)

220 mA

SRR7032-470M

Bourns

General Purpose Inductor

Power Inductor

2

SMT

Yes

Yes

-40 °C (-40 °F)

Tin Over Nickel

18 MHz

Dual Ended

280 mΩ

1

Ferrite

1 kHz

0.126 in (3.2 mm)

2828

Rectangular

20 %

Tape and Reel, Embossed, 13 in

0.276 in (7 mm)

e3

Rectangular Package

Wraparound

47 μH

0.276 in (7 mm)

125 °C (257 °F)

670 mA

SRU1038-220Y

Bourns

General Purpose Inductor

Power Inductor

2

SMT

Yes

Yes

-40 °C (-40 °F)

Matte Tin

12 MHz

Dual Ended

55.8 mΩ

1

Ferrite

100 kHz

0.15 in (3.8 mm)

3939

Rectangular

30 %

Tape and Reel, Embossed, 13 in

0.394 in (10 mm)

e3

Rectangular Package

One Surface

22 μH

0.394 in (10 mm)

125 °C (257 °F)

2.2 A

SRU1048-151Y

Bourns

General Purpose Inductor

Power Inductor

2

SMT

Yes

Yes

-40 °C (-40 °F)

Silver Nickel Tin

4.5 MHz

Dual Ended

305 mΩ

1

Ferrite

100 kHz

0.189 in (4.8 mm)

3939

Rectangular

30 %

Tape and Reel, Embossed, 13 in

0.394 in (10 mm)

e2

Rectangular Package

One Surface

150 μH

0.394 in (10 mm)

125 °C (257 °F)

1 A

SRU1063-330Y

Bourns

General Purpose Inductor

Power Inductor

2

SMT

Yes

Yes

-40 °C (-40 °F)

Tin

8 MHz

Dual Ended

105 mΩ

1

Ferrite

100 kHz

0.256 in (6.5 mm)

3939

Rectangular

30 %

Tape and Reel, Embossed, 13 in

0.394 in (10 mm)

e3

Rectangular Package

One Surface

33 μH

0.394 in (10 mm)

125 °C (257 °F)

2.2 A

SRU5018-100Y

Bourns

General Purpose Inductor

Power Inductor

2

SMT

Yes

Yes

-40 °C (-40 °F)

Tin

50 MHz

Dual Ended

65 mΩ

1

Ferrite

100 kHz

0.071 in (1.8 mm)

2121

Rectangular

30 %

Tape and Reel, Embossed, 7 in

0.205 in (5.2 mm)

e3

Rectangular Package

One Surface

10 μH

0.205 in (5.2 mm)

125 °C (257 °F)

1.25 A

SRU5018-2R2Y

Bourns

General Purpose Inductor

Power Inductor

2

SMT

Yes

Yes

-40 °C (-40 °F)

Tin

130 MHz

Dual Ended

20.5 mΩ

1

Ferrite

100 kHz

0.071 in (1.8 mm)

2121

Rectangular

30 %

Tape and Reel, Embossed, 7 in

0.205 in (5.2 mm)

e3

Rectangular Package

One Surface

2.2 μH

0.205 in (5.2 mm)

125 °C (257 °F)

2.3 A

SRU8028A-100Y

Bourns

General Purpose Inductor

Power Inductor

2

SMT

Yes

Yes

-40 °C (-40 °F)

Tin Over Nickel

35 MHz

Dual Ended

57 mΩ

1

Ferrite

100 kHz

0.11 in (2.8 mm)

3131

Rectangular

30 %

Tape and Reel, Embossed, 13 in

0.315 in (8 mm)

e3

Rectangular Package

One Surface

10 μH

AEC-Q200

0.315 in (8 mm)

125 °C (257 °F)

2.6 A

SRU8028A-150Y

Bourns

General Purpose Inductor

Power Inductor

2

SMT

Yes

Yes

-40 °C (-40 °F)

Tin Over Nickel

25 MHz

Dual Ended

85 mΩ

1

Ferrite

100 kHz

0.11 in (2.8 mm)

3131

Rectangular

30 %

Tape and Reel, Embossed, 13 in

0.315 in (8 mm)

e3

Rectangular Package

One Surface

15 μH

AEC-Q200

0.315 in (8 mm)

125 °C (257 °F)

2 A

SRU8028A-2R5Y

Bourns

General Purpose Inductor

Power Inductor

2

SMT

Yes

Yes

-40 °C (-40 °F)

Tin with Nickel barrier

65 MHz

Dual Ended

18 mΩ

1

Ferrite

100 kHz

0.11 in (2.8 mm)

3131

Rectangular

30 %

Tape and Reel, Embossed, 13 in

0.315 in (8 mm)

e3

Rectangular Package

One Surface

2.5 μH

AEC-Q200

0.315 in (8 mm)

125 °C (257 °F)

4.5 A

SRU8043-150Y

Bourns

General Purpose Inductor

Power Inductor

2

SMT

Yes

Yes

-40 °C (-40 °F)

Tin/Nickel/Silver

15 MHz

Dual Ended

46 mΩ

1

Ferrite

100 kHz

0.169 in (4.3 mm)

3131

Rectangular

30 %

Tape and Reel, Embossed, 13 in

0.315 in (8 mm)

e2

Rectangular Package

One Surface

15 μH

0.315 in (8 mm)

125 °C (257 °F)

2.7 A

1120-120K-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Radial

No

No

0.055 in (1.397 mm)

0.63 in (16.002 mm)

-55 °C (-67 °F)

Radial

9 mΩ

1

0.5 in (12.7 mm)

Ferrite

1 kHz

Bobbin Core

10 %

0.84 in (21.336 mm)

Cylindrical Package

Wire

12 μH

0.81 in (20.574 mm)

105 °C (221 °F)

11.4 A

1130-471K-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Radial

No

No

0.036 in (0.9144 mm)

0.77 in (19.558 mm)

-55 °C (-67 °F)

Tin

Radial

187 mΩ

1

0.5 in (12.7 mm)

Ferrite

1 kHz

Bobbin Core

10 %

0.84 in (21.336 mm)

e3

Cylindrical Package

Wire

470 μH

1.1 in (27.94 mm)

105 °C (221 °F)

4 A

1140-121K-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Radial

No

No

0.057 in (1.4478 mm)

1.15 in (29.21 mm)

-55 °C (-67 °F)

Tin Copper

Radial

28 mΩ

1

0.5 in (12.7 mm)

Ferrite

1 kHz

Bobbin Core

10 %

1.03 in (26.162 mm)

e2

Cylindrical Package

Wire

120 μH

1.5 in (38.1 mm)

105 °C (221 °F)

9.9 A

1140-153K-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Radial

No

No

0.02 in (0.508 mm)

1.1 in (27.94 mm)

-55 °C (-67 °F)

Tin Copper

Radial

3.39 Ω

1

0.5 in (12.7 mm)

Ferrite

1 kHz

Bobbin Core

10 %

1.03 in (26.162 mm)

e2

Cylindrical Package

Wire

15 mH

1.5 in (38.1 mm)

105 °C (221 °F)

900 mA

1140-221K-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Radial

No

No

0.051 in (1.2954 mm)

1.15 in (29.21 mm)

-55 °C (-67 °F)

Tin Copper

Radial

50 mΩ

1

0.5 in (12.7 mm)

Ferrite

1 kHz

Bobbin Core

10 %

1.03 in (26.162 mm)

e2

Cylindrical Package

Wire

220 μH

1.5 in (38.1 mm)

105 °C (221 °F)

7.4 A

2000-1R2-H-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Radial

No

No

0.059 in (1.4986 mm)

0.6 in (15.24 mm)

-55 °C (-67 °F)

Tin

Radial

2.2 mΩ

1

1 kHz

Horizontal Mounting

20 %

0.41 in (10.414 mm)

e3

Cylindrical Package

Wire

1.2 μH

0.68 in (17.272 mm)

105 °C (221 °F)

20.2 A

2100LL-121-V-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Toroidal

Yes

No

0.034 in (0.8636 mm)

0.4 in (10.16 mm)

-55 °C (-67 °F)

Radial

39 mΩ

1

0.5 in (12.7 mm)

1 kHz

Vertical Mount

15 %

0.45 in (11.43 mm)

Cylindrical Package

Wire

120 μH

0.86 in (21.844 mm)

125 °C (257 °F)

4.1 A

2104-H-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Toroidal

Yes

No

0.042 in (1.0668 mm)

0.76 in (19.304 mm)

-55 °C (-67 °F)

Axial

13 mΩ

1

1 kHz

Horizontal Mounting

15 %

0.45 in (11.43 mm)

Cylindrical Package

Wire

18 μH

0.86 in (21.844 mm)

105 °C (221 °F)

7.4 A

2113-V-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Toroidal

Yes

No

0.022 in (0.5588 mm)

0.31 in (7.874 mm)

-55 °C (-67 °F)

Radial

150 mΩ

1

1 kHz

Vertical Mount

15 %

0.45 in (11.43 mm)

Cylindrical Package

Wire

120 μH

0.86 in (21.844 mm)

105 °C (221 °F)

2.2 A

2114-H-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Toroidal

Yes

No

0.034 in (0.8636 mm)

0.79 in (20.066 mm)

-55 °C (-67 °F)

Axial

62 mΩ

1

1 kHz

Horizontal Mounting

15 %

0.45 in (11.43 mm)

Cylindrical Package

Wire

150 μH

0.86 in (21.844 mm)

105 °C (221 °F)

3.4 A

2200LL-331-H-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Toroidal

Yes

No

0.034 in (0.8636 mm)

1.01 in (25.654 mm)

-55 °C (-67 °F)

Radial

77 mΩ

1

0.5 in (12.7 mm)

1 kHz

Horizontal Mounting

15 %

0.55 in (13.97 mm)

Cylindrical Package

Wire

330 μH

1.1 in (27.94 mm)

125 °C (257 °F)

4 A

2210-V-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Toroidal

Yes

No

0.042 in (1.0668 mm)

0.45 in (11.43 mm)

-55 °C (-67 °F)

Axial

26 mΩ

1

1 kHz

Vertical Mount

15 %

0.55 in (13.97 mm)

Cylindrical Package

Wire

56 μH

0.95 in (24.13 mm)

105 °C (221 °F)

6.4 A

2318-H-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Toroidal

Yes

No

0.042 in (1.0668 mm)

1.17 in (29.718 mm)

-55 °C (-67 °F)

Radial

67 mΩ

1

1 kHz

Horizontal Mounting

15 %

0.65 in (16.51 mm)

Cylindrical Package

Wire

330 μH

1.28 in (32.512 mm)

105 °C (221 °F)

5.2 A

4652-RC

Bourns

General Purpose Inductor

RF Inductor

2

Axial

No

No

0.029 in (0.736 mm)

59

-55 °C (-67 °F)

3.7 MHz

Axial

19 Ω

1

1.5 in (38.1 mm)

Phenolic

252 kHz

4600

Varnish Coating

5 %

0.875 in (22.225 mm)

Tubular Package

4600

Wire

1 mH

0.56 in (14.224 mm)

125 °C (257 °F)

160 mA

5248-RC

Bourns

General Purpose Inductor

2

Axial

No

No

-55 °C (-67 °F)

Matte Tin

Axial

54 mΩ

1

1.25 in (31.75 mm)

Ferrite

1 kHz

Tubular

20 %

Bulk

1.25 in (31.75 mm)

e3

Tubular Package

Wire

68 μH

0.56 in (14.22 mm)

105 °C (221 °F)

5 A

5300-21-RC

Bourns

General Purpose Inductor

RF Inductor

2

Axial

No

No

0.02 in (0.51 mm)

-55 °C (-67 °F)

Matte Tin

6 MHz

Axial

350 mΩ

1

1 in (25.4 mm)

Ferrite

1 kHz

Conformal Coated

10 %

Bulk

0.5 in (12.7 mm)

e3

Tubular Package

Wire

47 μH

0.16 in (4.06 mm)

105 °C (221 °F)

760 mA

5300-25-RC

Bourns

General Purpose Inductor

RF Inductor

2

Axial

No

No

0.02 in (0.51 mm)

-55 °C (-67 °F)

Matte Tin

3.9 MHz

Axial

670 mΩ

1

1 in (25.4 mm)

Ferrite

1 kHz

Conformal Coated

10 %

Bulk

0.5 in (12.7 mm)

e3

Tubular Package

Wire

100 μH

0.16 in (4.06 mm)

105 °C (221 °F)

550 mA

5300-37-RC

Bourns

General Purpose Inductor

RF Inductor

2

Axial

No

No

0.02 in (0.51 mm)

-55 °C (-67 °F)

Matte Tin

1 MHz

Axial

7.9 Ω

1

1 in (25.4 mm)

Ferrite

1 kHz

Conformal Coated

10 %

Bulk

0.5 in (12.7 mm)

e3

Tubular Package

Wire

1 mH

0.16 in (4.06 mm)

105 °C (221 °F)

160 mA

5300-41-RC

Bourns

General Purpose Inductor

RF Inductor

2

Axial

No

No

0.02 in (0.51 mm)

-55 °C (-67 °F)

Matte Tin

640 kHz

Axial

19 Ω

1

1 in (25.4 mm)

Ferrite

1 kHz

Conformal Coated

10 %

Bulk

0.5 in (12.7 mm)

e3

Tubular Package

Wire

2.2 mH

0.16 in (4.06 mm)

105 °C (221 °F)

100 mA

5702-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Toroidal

Yes

No

0.04 in (1.016 mm)

0.3 in (7.62 mm)

-55 °C (-67 °F)

Radial

14 mΩ

1

0.5 in (12.7 mm)

1 kHz

Vertical Mount

15 %

0.875 in (22.225 mm)

Cylindrical Package

Wire

25 μH

0.437 in (11.0998 mm)

105 °C (221 °F)

5.5 A

5800-100-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Axial

No

No

0.026 in (0.65024 mm)

-40 °C (-40 °F)

Axial

32 mΩ

1

1.12 in (28.448 mm)

Ferrite

1 kHz

Bobbin Core

10 %

0.7 in (17.78 mm)

Tubular Package

Wire

10 μH

0.275 in (6.985 mm)

125 °C (257 °F)

2.1 A

5800-152-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Axial

No

No

0.026 in (0.65024 mm)

-40 °C (-40 °F)

Axial

3.9 Ω

1

1.12 in (28.448 mm)

Ferrite

1 kHz

Bobbin Core

10 %

0.7 in (17.78 mm)

Tubular Package

Wire

1.5 mH

0.275 in (6.985 mm)

125 °C (257 °F)

190 mA

5800-680-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Axial

No

No

0.026 in (0.65024 mm)

-40 °C (-40 °F)

Axial

166 mΩ

1

1.12 in (28.448 mm)

Ferrite

1 kHz

Bobbin Core

10 %

0.7 in (17.78 mm)

Tubular Package

Wire

68 μH

0.275 in (6.985 mm)

125 °C (257 °F)

900 mA

5900-331-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Axial

No

No

0.031 in (0.7976 mm)

-40 °C (-40 °F)

1.5 MHz

Axial

285 mΩ

1

1.12 in (28.448 mm)

Ferrite

1 kHz

Bobbin Core

10 %

0.9 in (22.86 mm)

Tubular Package

Wire

330 μH

0.453 in (11.5062 mm)

125 °C (257 °F)

1.2 A

5900-391-RC

Bourns

General Purpose Inductor

High Current Inductor

2

Axial

No

No

0.031 in (0.7976 mm)

-40 °C (-40 °F)

1.3 MHz

Axial

310 mΩ

1

1.12 in (28.448 mm)

Ferrite

1 kHz

Bobbin Core

10 %

0.9 in (22.86 mm)

Tubular Package

Wire

390 μH

0.453 in (11.5062 mm)

125 °C (257 °F)

1.2 A

77F681J-TR-RC

Bourns

General Purpose Inductor

DC-DC Converter

2

Axial

No

No

0.025 in (0.64 mm)

45

-55 °C (-67 °F)

Tin Silver Copper

1.6 MHz

Axial

12 Ω

1

1 in (25.4 mm)

Ferrite

796 kHz

Conformal Coated

5 %

Tape and Reel, 14 in

0.41 in (10.41 mm)

e1

Tubular Package

Wire

680 μH

0.157 in (3.99 mm)

105 °C (221 °F)

113 mA

78F120J-RC

Bourns

General Purpose Inductor

DC-DC Converter

2

Axial

No

No

0.02 in (0.51 mm)

45

-55 °C (-67 °F)

Tin

16 MHz

Axial

800 mΩ

1

1 in (25.4 mm)

Ferrite

2.5 MHz

Conformal Coated

5 %

Bulk

0.28 in (7.11 mm)

e3

Tubular Package

Wire

12 μH

0.11 in (2.79 mm)

105 °C (221 °F)

350 mA

78F181J-RC

Bourns

General Purpose Inductor

DC-DC Converter

2

Axial

No

No

0.02 in (0.51 mm)

60

-55 °C (-67 °F)

Tin

4.35 MHz

Axial

6 Ω

1

1 in (25.4 mm)

Ferrite

790 kHz

Conformal Coated

5 %

Bulk

0.28 in (7.11 mm)

e3

Tubular Package

Wire

180 μH

0.11 in (2.79 mm)

105 °C (221 °F)

140 mA

78F1R0K-RC

Bourns

General Purpose Inductor

DC-DC Converter

2

Axial

No

No

0.02 in (0.51 mm)

40

-55 °C (-67 °F)

Tin

180 MHz

Axial

150 mΩ

1

1 in (25.4 mm)

Ferrite

25 MHz

Conformal Coated

10 %

Bulk

0.28 in (7.11 mm)

e3

Tubular Package

Wire

1 μH

0.11 in (2.79 mm)

105 °C (221 °F)

815 mA

78F220J-RC

Bourns

General Purpose Inductor

DC-DC Converter

2

Axial

No

No

0.02 in (0.51 mm)

50

-55 °C (-67 °F)

Tin

13 MHz

Axial

1.2 Ω

1

1 in (25.4 mm)

Ferrite

2.5 MHz

Conformal Coated

5 %

Bulk

0.28 in (7.11 mm)

e3

Tubular Package

Wire

22 μH

0.11 in (2.79 mm)

105 °C (221 °F)

285 mA

8230-68-RC

Bourns

General Purpose Inductor

DC-DC Converter

2

Axial

No

No

0.02 in (0.51 mm)

50

-55 °C (-67 °F)

Tin Copper

13 MHz

Axial

8 Ω

1

1 in (25.4 mm)

Ferrite

2.5 MHz

Tubular

10 %

Bulk

0.3 in (7.62 mm)

e2

Tubular Package

Wire

100 μH

0.12 in (3.05 mm)

105 °C (221 °F)

125 mA

8250-273K-RC

Bourns

General Purpose Inductor

RF Inductor

2

Axial

Yes

No

0.02 in (0.51 mm)

50

-55 °C (-67 °F)

Tin

460 kHz

Axial

195 Ω

1

1 in (25.4 mm)

Ferrite

79 kHz

Tubular

10 %

Bulk

0.45 in (11.43 mm)

e3

Tubular Package

Wire

27 mH

0.164 in (4.17 mm)

105 °C (221 °F)

34 mA

8250-4R7K-RC

Bourns

General Purpose Inductor

RF Inductor

2

Axial

Yes

No

0.02 in (0.51 mm)

42

-55 °C (-67 °F)

Tin

72 MHz

Axial

168 mΩ

1

1 in (25.4 mm)

Ferrite

7.9 MHz

Tubular

10 %

Bulk

0.45 in (11.43 mm)

e3

Tubular Package

Wire

4.7 μH

0.164 in (4.17 mm)

105 °C (221 °F)

710 mA

9130-08

Bourns

General Purpose Inductor

RF Inductor

2

Axial

No

No

0.02 in (0.508 mm)

30

-55 °C (-67 °F)

410 MHz

Axial

220 mΩ

1

1 in (25.4 mm)

Phenolic

25 MHz

9130

Flame Retardant

10 %

0.25 in (6.35 mm)

Tubular Package

9130

Wire

330 nH

0.095 in (2.413 mm)

125 °C (257 °F)

815 mA

Fixed Inductors

Fixed inductors, also known as passive inductors, are electronic components that are designed to store energy in a magnetic field. These components are used in a wide range of electronic applications, including power supplies, filters, oscillators, and RF circuits.

Fixed inductors can be classified into several types based on their specific characteristics and applications. Some of the most common types of fixed inductors include:

1. Wire-wound inductors - These inductors consist of a wire coil wound around a core, typically made of a magnetic material such as iron or ferrite. Wire-wound inductors are commonly used in power supplies and filters.

2. Multilayer ceramic inductors - These inductors are made by stacking thin layers of ceramic material with metal electrodes. Multilayer ceramic inductors are commonly used in high-frequency applications due to their high Q factor and small size.

3. Ferrite bead inductors - These inductors consist of a cylindrical or toroidal ferrite bead that is threaded onto a wire or placed over a PCB trace. Ferrite bead inductors are commonly used in EMI suppression and RF filtering applications.

Fixed inductors are available in a wide range of inductance values, sizes, and power ratings. They are typically characterized by their inductance value, tolerance, and frequency response. Inductance is measured in henries (H) or millihenries (mH), and tolerance refers to the allowed deviation from the specified inductance value.