ESD Protection Diodes / TVS Diodes

.hide-partial { max-height: none; } .show-more { display: none; }

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Results: 75

Applied Filters:

Polarity

Number of Channels

Working Voltage

Clamping Voltage

Breakdown Voltage

Package / Case

Ipp - Peak Pulse Current

Pppm - Peak Pulse Power Dissipation

Cd - Diode Capacitance

Vesd - Voltage ESD Contact

Vesd - Voltage ESD Air Gap

Minimum Operating Temperature

Series

Qualification

Packaging

Reset All

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Part #

ESD Protection Diodes / TVS Diodes 600W 16V AEC-Q101 5% Uni-Directional

TPSMA6L16A
Littelfuse
1: $0.645
270In Stock

Mfr. Part #
TPSMA6L16A

Mouser Part #
576-TPSMA6L16A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 16V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

270In Stock

Cut Tape

$0.645

$0.468

$0.344

$0.281

$0.252

Reel

$0.23

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

16 V

SMD/SMT

26 V

17.8 V

DO-221AC-2

23.1 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 600W 17V AEC-Q101 5% Uni-Directional

TPSMA6L17A
Littelfuse
1: $0.721
5,066In Stock

Mfr. Part #
TPSMA6L17A

Mouser Part #
576-TPSMA6L17A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 17V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

5,066In Stock

Cut Tape

$0.721

$0.616

$0.414

$0.335

$0.272

Reel

$0.23

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

17 V

SMD/SMT

27.6 V

18.9 V

DO-221AC-2

21.8 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 600W 20V AEC-Q101 5% Uni-Directional

TPSMA6L20A
Littelfuse
1: $0.921
982In Stock

Mfr. Part #
TPSMA6L20A

Mouser Part #
576-TPSMA6L20A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 20V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

982In Stock

Cut Tape

$0.921

$0.692

$0.447

$0.341

$0.272

Reel

$0.23

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

20 V

SMD/SMT

32.4 V

22.2 V

DO-221AC-2

18.6 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 600W 22V AEC-Q101 5% Uni-Directional

TPSMA6L22A
Littelfuse
1: $1.07
4,734In Stock

Mfr. Part #
TPSMA6L22A

Mouser Part #
576-TPSMA6L22A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 22V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

4,734In Stock

Cut Tape

$1.07

$0.663

$0.43

$0.352

Reel

$0.273

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

22 V

SMD/SMT

35.5 V

24.4 V

DO-221AC-2

16.9 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 600W 28V AEC-Q101 5% Uni-Directional

TPSMA6L28A
Littelfuse
1: $0.384
4,436In Stock

Mfr. Part #
TPSMA6L28A

Mouser Part #
576-TPSMA6L28A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 28V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

4,436In Stock

Cut Tape

$0.384

$0.322

$0.302

$0.269

Reel

$0.236

$0.23

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

28 V

SMD/SMT

45.4 V

31.1 V

DO-221AC-2

13.3 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 600W 30V AEC-Q101 5% Uni-Directional

TPSMA6L30A
Littelfuse
1: $0.445
337In Stock
6,000Expected 2026-05-14

Mfr. Part #
TPSMA6L30A

Mouser Part #
576-TPSMA6L30A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 30V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

337In Stock

6,000Expected 2026-05-14

Cut Tape

$0.445

$0.29

$0.286

$0.281

$0.255

Reel

$0.23

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

30 V

SMD/SMT

48.4 V

33.3 V

DO-221AC-2

12.4 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 600W 48V AEC-Q101 5% Uni-Directional

TPSMA6L48A
Littelfuse
1: $0.461
3,420In Stock

Mfr. Part #
TPSMA6L48A

Mouser Part #
576-TPSMA6L48A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 48V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

3,420In Stock

Cut Tape

$0.461

$0.388

$0.319

$0.273

$0.247

Reel

$0.23

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

48 V

SMD/SMT

77.4 V

53.3 V

DO-221AC-2

7.8 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 600W 5V AEC-Q101 5% Uni-Directional

TPSMA6L5.0A
Littelfuse
1: $0.583
3,355In Stock

Mfr. Part #
TPSMA6L5.0A

Mouser Part #
576-TPSMA6L5.0A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 5V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

3,355In Stock

Cut Tape

$0.583

$0.493

$0.344

$0.287

$0.255

Reel

$0.23

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

5 V

SMD/SMT

9.2 V

6.4 V

DO-221AC-2

65.3 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 600W 51V AEC-Q101 5% Uni-Directional

TPSMA6L51A
Littelfuse
1: $0.737
4,435In Stock

Mfr. Part #
TPSMA6L51A

Mouser Part #
576-TPSMA6L51A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 51V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

4,435In Stock

Cut Tape

$0.737

$0.579

$0.447

$0.356

Reel

$0.264

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

51 V

SMD/SMT

82.4 V

56.7 V

DO-221AC-2

7.3 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 600W 58V AEC-Q101 5% Uni-Directional

TPSMA6L58A
Littelfuse
1: $0.982
1,608In Stock
3,000Expected 2026-05-15

Mfr. Part #
TPSMA6L58A

Mouser Part #
576-TPSMA6L58A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 58V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

1,608In Stock

3,000Expected 2026-05-15

Cut Tape

$0.982

$0.692

$0.447

$0.341

Reel

$0.25

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

58 V

SMD/SMT

93.6 V

64.4 V

DO-221AC-2

6.5 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 600W 6V AEC-Q101 5% Uni-Directional

TPSMA6L6.0A
Littelfuse
1: $0.829
208In Stock

Mfr. Part #
TPSMA6L6.0A

Mouser Part #
576-TPSMA6L6.0A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 6V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

208In Stock

Cut Tape

$0.829

$0.579

$0.467

$0.345

$0.276

Reel

$0.23

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

6 V

SMD/SMT

10.3 V

6.67 V

DO-221AC-2

58.3 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 600W 6.5V AEC-Q101 5% Uni-Directional

TPSMA6L6.5A
Littelfuse
1: $0.829
2,802In Stock

Mfr. Part #
TPSMA6L6.5A

Mouser Part #
576-TPSMA6L6.5A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 6.5V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

2,802In Stock

Cut Tape

$0.829

$0.579

$0.456

$0.356

Reel

$0.246

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

6.5 V

SMD/SMT

11.2 V

7.22 V

DO-221AC-2

53.6 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 600W 64V AEC-Q101 5% Uni-Directional

TPSMA6L64A
Littelfuse
1: $0.491
4,291In Stock

Mfr. Part #
TPSMA6L64A

Mouser Part #
576-TPSMA6L64A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 64V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

4,291In Stock

Cut Tape

$0.491

$0.385

$0.299

$0.247

Reel

$0.224

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

64 V

SMD/SMT

103 V

71.1 V

DO-221AC-2

5.9 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 600W 70V AEC-Q101 5% Uni-Directional

TPSMA6L70A
Littelfuse
1: $0.783
4,653In Stock

Mfr. Part #
TPSMA6L70A

Mouser Part #
576-TPSMA6L70A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 70V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

4,653In Stock

Cut Tape

$0.783

$0.579

$0.394

$0.309

$0.272

Reel

$0.23

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

70 V

SMD/SMT

113 V

77.8 V

DO-221AC-2

5.3 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 600W 75V AEC-Q101 5% Uni-Directional

TPSMA6L75A
Littelfuse
1: $1.01
3,102In Stock

Mfr. Part #
TPSMA6L75A

Mouser Part #
576-TPSMA6L75A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 75V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

3,102In Stock

Cut Tape

$1.01

$0.678

$0.439

$0.309

Reel

$0.255

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

75 V

SMD/SMT

121 V

83.3 V

DO-221AC-2

5 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 600W 78V AEC-Q101 5% Uni-Directional

TPSMA6L78A
Littelfuse
1: $0.829
1,887In Stock

Mfr. Part #
TPSMA6L78A

Mouser Part #
576-TPSMA6L78A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 78V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

1,887In Stock

Cut Tape

$0.829

$0.579

$0.394

$0.356

Reel

$0.25

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

78 V

SMD/SMT

126 V

86.7 V

DO-221AC-2

4.8 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 600W 85V AEC-Q101 5% Uni-Directional

TPSMA6L85A
Littelfuse
1: $0.414
3,922In Stock

Mfr. Part #
TPSMA6L85A

Mouser Part #
576-TPSMA6L85A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 85V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

3,922In Stock

Cut Tape

$0.414

$0.339

$0.276

$0.244

$0.236

Reel

$0.23

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

85 V

SMD/SMT

137 V

94.4 V

DO-221AC-2

4.4 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 600W 9V AEC-Q101 5% Uni-Directional

TPSMA6L9.0A
Littelfuse
1: $0.844
743In Stock

Mfr. Part #
TPSMA6L9.0A

Mouser Part #
576-TPSMA6L9.0A

Littelfuse

ESD Protection Diodes / TVS Diodes 600W 9V AEC-Q101 5% Uni-Directional

Learn More

Datasheet

743In Stock

Cut Tape

$0.844

$0.579

$0.394

$0.309

$0.276

Reel

$0.23

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Unidirectional

1 Channel

9 V

SMD/SMT

15.4 V

10 V

DO-221AC-2

39 A

600 W

8 kV

15 kV

- 65 C

+ 150 C

TPSMA6L

AEC-Q100

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 12V 400W BI-DIR SZ1SMA AEC-Q101

SZ1SMA12CAT3G
Littelfuse
1: $1.17
7,027In Stock

Mfr. Part #
SZ1SMA12CAT3G

Mouser Part #
863-SZ1SMA12CAT3G

Littelfuse

ESD Protection Diodes / TVS Diodes 12V 400W BI-DIR SZ1SMA AEC-Q101

Learn More

Datasheet

7,027In Stock

Cut Tape

$1.17

$0.725

$0.468

$0.358

Reel

$0.252

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

Bidirectional

1 Channel

12 V

SMD/SMT

19.9 V

13.3 V

SMA (DO-214AC)

20.1 A

400 W

16 kV

- 65 C

+ 150 C

SZ1SMAxxCAT3G

AEC-Q101

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 13V 400W UNI-DIR SZ1SMA AEC-Q101

SZ1SMA13AT3G
Littelfuse
1: $0.998
1,166In Stock

Mfr. Part #
SZ1SMA13AT3G

Mouser Part #
863-SZ1SMA13AT3G

Littelfuse

ESD Protection Diodes / TVS Diodes 13V 400W UNI-DIR SZ1SMA AEC-Q101

Learn More

Datasheet

1,166In Stock

Cut Tape

$0.998

$0.675

$0.436

$0.333

Reel

$0.229

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

Unidirectional

1 Channel

13 V

SMD/SMT

21.5 V

14.4 V

SMA (DO-214AC)

18.6 A

400 W

860 pF

- 65 C

+ 150 C

SZ1SMAxxxAT3G

AEC-Q101

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 15V 400W UNI-DIR SZ1SMA AEC-Q101

SZ1SMA15AT3G
Littelfuse
1: $0.721
5,436In Stock

Mfr. Part #
SZ1SMA15AT3G

Mouser Part #
863-SZ1SMA15AT3G

Littelfuse

ESD Protection Diodes / TVS Diodes 15V 400W UNI-DIR SZ1SMA AEC-Q101

Learn More

Datasheet

5,436In Stock

Cut Tape

$0.721

$0.617

$0.422

$0.327

Reel

$0.235

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

Unidirectional

1 Channel

15 V

SMD/SMT

24.4 V

16.7 V

SMA (DO-214AC)

16.4 A

400 W

758 pF

- 65 C

+ 150 C

SZ1SMAxxxAT3G

AEC-Q101

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 15V 400W BI-DIR SZ1SMA AEC-Q101

SZ1SMA15CAT3G
Littelfuse
1: $0.829
8,642In Stock

Mfr. Part #
SZ1SMA15CAT3G

Mouser Part #
863-SZ1SMA15CAT3G

Littelfuse

ESD Protection Diodes / TVS Diodes 15V 400W BI-DIR SZ1SMA AEC-Q101

Learn More

Datasheet

8,642In Stock

Cut Tape

$0.829

$0.589

$0.388

$0.358

Reel

$0.258

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

Bidirectional

1 Channel

15 V

SMD/SMT

24.4 V

16.7 V

SMA (DO-214AC)

16.4 A

400 W

16 kV

- 65 C

+ 150 C

SZ1SMAxxCAT3G

AEC-Q101

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 16V 400W UNI-DIR SZ1SMA AEC-Q101

SZ1SMA16AT3G
Littelfuse
1: $0.844
4,388In Stock

Mfr. Part #
SZ1SMA16AT3G

Mouser Part #
863-SZ1SMA16AT3G

Littelfuse

ESD Protection Diodes / TVS Diodes 16V 400W UNI-DIR SZ1SMA AEC-Q101

Learn More

Datasheet

4,388In Stock

Cut Tape

$0.844

$0.646

$0.436

$0.339

Reel

$0.239

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

Unidirectional

1 Channel

16 V

SMD/SMT

26 V

17.8 V

SMA (DO-214AC)

15.4 A

400 W

715 pF

- 65 C

+ 150 C

SZ1SMAxxxAT3G

AEC-Q101

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 16V 400W BI-DIR SZ1SMA AEC-Q101

SZ1SMA16CAT3G
Littelfuse
1: $1.18
2,557In Stock

Mfr. Part #
SZ1SMA16CAT3G

Mouser Part #
863-SZ1SMA16CAT3G

Littelfuse

ESD Protection Diodes / TVS Diodes 16V 400W BI-DIR SZ1SMA AEC-Q101

Learn More

Datasheet

2,557In Stock

Cut Tape

$1.18

$0.725

$0.468

$0.379

View

Reel

$0.243

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

Bidirectional

1 Channel

16 V

SMD/SMT

26 V

17.8 V

SMA (DO-214AC)

15.4 A

400 W

16 kV

- 65 C

+ 150 C

SZ1SMAxxCAT3G

AEC-Q101

Reel, Cut Tape, MouseReel

ESD Protection Diodes / TVS Diodes 18V 400W UNI-DIR SZ1SMA AEC-Q101

SZ1SMA18AT3G
Littelfuse
1: $0.691
6,272In Stock

Mfr. Part #
SZ1SMA18AT3G

Mouser Part #
863-SZ1SMA18AT3G

Littelfuse

ESD Protection Diodes / TVS Diodes 18V 400W UNI-DIR SZ1SMA AEC-Q101

Learn More

Datasheet

6,272In Stock

Cut Tape

$0.691

$0.599

$0.416

$0.325

Reel

$0.235

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

Unidirectional

1 Channel

18 V

SMD/SMT

29.2 V

20 V

SMA (DO-214AC)

13.7 A

400 W

645 pF

- 65 C

+ 150 C

SZ1SMAxxxAT3G

AEC-Q101

Reel, Cut Tape, MouseReel

Mouser Electronics®

Company

Resources

Support

5 V
6 V
6.5 V
7 V
7.5 V
8 V
8.5 V
9 V
10 V
11 V
12 V
13 V
14 V
15 V
16 V
17 V
18 V
20 V
22 V
24 V

9.2 V
10.3 V
11.2 V
12 V
12.9 V
13.6 V
14.4 V
14.5 V
15.4 V
17 V
18.2 V
19.9 V
21.5 V
23.2 V
24.4 V
26 V
27.6 V
29.2 V
32.4 V
35.5 V

6 V
6.4 V
6.67 V
7.22 V
7.78 V
8.33 V
8.89 V
10 V
10.4 V
11.1 V
12.2 V
13.3 V
14.4 V
15.6 V
16.7 V
17.8 V
18.9 V
20 V
22.2 V
23.37 V

3.2 A
3.5 A
4.1 A
4.3 A
4.4 A
4.6 A
4.8 A
5 A
5.2 A
5.3 A
5.8 A
5.9 A
6.2 A
6.5 A
6.9 A
7.3 A
7.5 A
7.8 A
8.3 A
8.7 A

90 pF
95 pF
110 pF
115 pF
135 pF
160 pF
175 pF
190 pF
200 pF
210 pF
225 pF
240 pF
265 pF
295 pF
305 pF
345 pF
375 pF
405 pF
430 pF
460 pF