ESD Protection Diodes / TVS Diodes

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

1.5SMC TRANSZORB® Transient Voltage Suppressors

Vishay General Semiconductor 1.5SMC TRANSZORB® SMD Transient Voltage Suppressors are designed to protect sensitive electronics from voltage transients induced by inductive load switching and lightning. These Vishay suppressors feature a low-profile SMC (DO-214AB) package, making the diodes ideal for automated placement. The 1.5SMC family offers excellent clamping capability and very fast response times, ensuring reliable protection for ICs, MOSFETs, and signal lines in consumer, computer, industrial, automotive, and telecommunication applications. The devices are available in both unidirectional and bidirectional configurations, with a peak pulse power capability of 1500W and a maximum junction temperature of +150°C. Additionally, the glass passivated chip junction enhances durability and performance. The 1.5SMC series meets industry standards for quality and reliability, making the devices a robust solution for transient voltage suppression.

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

Results: 581

Applied Filters:

Polarity

Number of Channels

Working Voltage

Clamping Voltage

Breakdown Voltage

Ipp - Peak Pulse Current

Pppm - Peak Pulse Power Dissipation

Minimum Operating Temperature

Maximum Operating Temperature

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 1.5KW,51V 5%,UNIDIR,SMC TVS

1.5SMC51AHE3_A/I
Vishay Semiconductors
1: $1.63
3,481In Stock

Mfr. Part No.
1.5SMC51AHE3_A/I

Mouser Part No
78-1.5SMC51AHE3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,51V 5%,UNIDIR,SMC TVS

Learn More

Datasheet

3,481In Stock

Cut Tape

$1.63

$1.02

$0.669

$0.518

Reel

$0.407

View

Min.: 1
Mult.: 1

: 3,500

Unidirectional

1 Channel

SMD/SMT

70.1 V

48.5 V

SMC (DO-214AB)

21.4 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,18V 5%,UNIDIR,SMC TVS

1.5SMC18AHE3_A/I
Vishay Semiconductors
1: $1.63
2,720In Stock

Mfr. Part No.
1.5SMC18AHE3_A/I

Mouser Part No
78-1.5SMC18AHE3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,18V 5%,UNIDIR,SMC TVS

Learn More

Datasheet

2,720In Stock

Cut Tape

$1.63

$1.02

$0.669

$0.518

Reel

$0.389

View

Min.: 1
Mult.: 1

: 3,500

Unidirectional

1 Channel

SMD/SMT

25.2 V

18.9 V

SMC (DO-214AB)

59.5 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,91V 5%,UNIDIR,SMC TVS

1.5SMC91AHE3_A/I
Vishay Semiconductors
1: $1.63
3,734In Stock

Mfr. Part No.
1.5SMC91AHE3_A/I

Mouser Part No
78-1.5SMC91AHE3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,91V 5%,UNIDIR,SMC TVS

Learn More

Datasheet

3,734In Stock

Cut Tape

$1.63

$1.02

$0.669

$0.518

Reel

$0.389

View

Min.: 1
Mult.: 1

: 3,500

Unidirectional

1 Channel

SMD/SMT

125 V

86.5 V

SMC (DO-214AB)

12 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,110V 5%,UNIDIR,SMC TVS

1.5SMC110AHE3_A/I
Vishay Semiconductors
1: $1.63
3,490In Stock

Mfr. Part No.
1.5SMC110AHE3_A/I

Mouser Part No
78-1.5SMC110AHE3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,110V 5%,UNIDIR,SMC TVS

Learn More

Datasheet

3,490In Stock

Cut Tape

$1.63

$1.02

$0.669

$0.518

Reel

$0.407

View

Min.: 1
Mult.: 1

: 3,500

Unidirectional

1 Channel

9.4 V

SMD/SMT

15.6 V

11.6 V

SMC (DO-214AB)

96.2 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,130V 5%,BIDIR,SMC TVS

1.5SMC130CAHM3_A/I
Vishay Semiconductors
1: $1.50
2,470In Stock

Mfr. Part No.
1.5SMC130CAHM3_A/I

Mouser Part No
78-1.5SMC130CAHM3A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,130V 5%,BIDIR,SMC TVS

Learn More

Datasheet

2,470In Stock

Cut Tape

$1.50

$1.20

$0.937

$0.771

Reel

$0.656

View

Min.: 1
Mult.: 1

: 3,500

Bidirectional

1 Channel

SMD/SMT

179 V

124 V

SMC (DO-214AB)

8.4 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,15V 5%,BIDIR,SMC TVS

1.5SMC15CAHE3_A/I
Vishay Semiconductors
1: $2.03
3,324In Stock

Mfr. Part No.
1.5SMC15CAHE3_A/I

Mouser Part No
78-1.5SMC15CAHE3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,15V 5%,BIDIR,SMC TVS

Learn More

Datasheet

3,324In Stock

Cut Tape

$2.03

$1.28

$0.849

$0.665

Reel

$0.581

View

Min.: 1
Mult.: 1

: 3,500

Bidirectional

1 Channel

SMD/SMT

21.2 V

15.8 V

SMC (DO-214AB)

70.8 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,15V 5%,BIDIR,SMC TVS

1.5SMC15CAHM3_A/I
Vishay Semiconductors
1: $2.18
2,500In Stock

Mfr. Part No.
1.5SMC15CAHM3_A/I

Mouser Part No
78-1.5SMC15CAHM3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,15V 5%,BIDIR,SMC TVS

Learn More

Datasheet

2,500In Stock

Cut Tape

$2.18

$1.37

$0.907

$0.711

$0.645

Reel

$0.564

Min.: 1
Mult.: 1

: 3,500

Bidirectional

1 Channel

SMD/SMT

21.2 V

15.8 V

SMC (DO-214AB)

70.8 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,18V 5%,BIDIR,SMC TVS

1.5SMC18CAHM3_A/I
Vishay Semiconductors
1: $2.18
3,422In Stock

Mfr. Part No.
1.5SMC18CAHM3_A/I

Mouser Part No
78-1.5SMC18CAHM3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,18V 5%,BIDIR,SMC TVS

Learn More

Datasheet

3,422In Stock

Cut Tape

$2.18

$1.37

$0.907

$0.711

Reel

$0.622

View

Min.: 1
Mult.: 1

: 3,500

Bidirectional

1 Channel

SMD/SMT

25.2 V

18.9 V

SMC (DO-214AB)

59.5 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,20V 5%,BIDIR,SMC TVS

1.5SMC20CAHM3_A/I
Vishay Semiconductors
1: $2.16
3,380In Stock

Mfr. Part No.
1.5SMC20CAHM3_A/I

Mouser Part No
78-1.5SMC20CAHM3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,20V 5%,BIDIR,SMC TVS

Learn More

Datasheet

3,380In Stock

Cut Tape

$2.16

$1.36

$0.906

$0.71

Reel

$0.544

View

Min.: 1
Mult.: 1

: 3,500

Bidirectional

1 Channel

SMD/SMT

27.7 V

21 V

SMC (DO-214AB)

54.2 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,220V 5%,UNIDIR,SMC TVS

1.5SMC220AHM3_A/I
Vishay Semiconductors
1: $1.73
2,960In Stock

Mfr. Part No.
1.5SMC220AHM3_A/I

Mouser Part No
78-1.5SMC220AHM3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,220V 5%,UNIDIR,SMC TVS

Learn More

Datasheet

2,960In Stock

Cut Tape

$1.73

$1.09

$0.714

$0.556

Reel

$0.461

View

Min.: 1
Mult.: 1

: 3,500

Unidirectional

1 Channel

SMD/SMT

328 V

231 V

SMC (DO-214AB)

4.6 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,30V 5%,UNIDIR,SMC TVS

1.5SMC30AHM3_A/I
Vishay Semiconductors
1: $1.71
3,499In Stock

Mfr. Part No.
1.5SMC30AHM3_A/I

Mouser Part No
78-1.5SMC30AHM3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,30V 5%,UNIDIR,SMC TVS

Learn More

Datasheet

3,499In Stock

Cut Tape

$1.71

$1.09

$0.713

$0.555

Reel

$0.435

View

Min.: 1
Mult.: 1

: 3,500

Unidirectional

1 Channel

SMD/SMT

41.4 V

31.5 V

SMC (DO-214AB)

36.2 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,30V 5%,BIDIR,SMC TVS

1.5SMC30CAHE3_A/I
Vishay Semiconductors
1: $2.11
408In Stock

Mfr. Part No.
1.5SMC30CAHE3_A/I

Mouser Part No
78-1.5SMC30CAHE3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,30V 5%,BIDIR,SMC TVS

Learn More

Datasheet

408In Stock

Cut Tape

$2.11

$1.33

$0.879

$0.688

Reel

$0.581

View

Min.: 1
Mult.: 1

: 3,500

Bidirectional

1 Channel

SMD/SMT

41.4 V

31.5 V

SMC (DO-214AB)

36.2 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,33V 5%,UNIDIR,SMC TVS

1.5SMC33AHE3_A/I
Vishay Semiconductors
1: $1.63
3,118In Stock

Mfr. Part No.
1.5SMC33AHE3_A/I

Mouser Part No
78-1.5SMC33AHE3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,33V 5%,UNIDIR,SMC TVS

Learn More

Datasheet

3,118In Stock

Cut Tape

$1.63

$1.02

$0.669

$0.589

Reel

$0.407

View

Min.: 1
Mult.: 1

: 3,500

Unidirectional

1 Channel

SMD/SMT

45.7 V

34.7 V

SMC (DO-214AB)

32.8 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,33V 5%,UNIDIR,SMC TVS

1.5SMC33AHM3_A/I
Vishay Semiconductors
1: $1.73
3,382In Stock

Mfr. Part No.
1.5SMC33AHM3_A/I

Mouser Part No
78-1.5SMC33AHM3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,33V 5%,UNIDIR,SMC TVS

Learn More

Datasheet

3,382In Stock

Cut Tape

$1.73

$1.09

$0.714

$0.556

Reel

$0.461

View

Min.: 1
Mult.: 1

: 3,500

Unidirectional

1 Channel

SMD/SMT

45.7 V

34.7 V

SMC (DO-214AB)

32.8 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,47V 5%,UNIDIR,SMC TVS

1.5SMC47AHM3_A/I
Vishay Semiconductors
1: $1.73
3,486In Stock

Mfr. Part No.
1.5SMC47AHM3_A/I

Mouser Part No
78-1.5SMC47AHM3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,47V 5%,UNIDIR,SMC TVS

Learn More

Datasheet

3,486In Stock

Cut Tape

$1.73

$1.09

$0.714

$0.556

Reel

$0.461

View

Min.: 1
Mult.: 1

: 3,500

Unidirectional

1 Channel

SMD/SMT

64.8 V

44.7 V

SMC (DO-214AB)

23.1 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,68V 5%,BIDIR,SMC TVS

1.5SMC68CAHE3_A/I
Vishay Semiconductors
1: $2.11
3,480In Stock

Mfr. Part No.
1.5SMC68CAHE3_A/I

Mouser Part No
78-1.5SMC68CAHE3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,68V 5%,BIDIR,SMC TVS

Learn More

Datasheet

3,480In Stock

Cut Tape

$2.11

$1.33

$0.879

$0.688

Reel

$0.602

View

Min.: 1
Mult.: 1

: 3,500

Bidirectional

1 Channel

SMD/SMT

92 V

64.6 V

SMC (DO-214AB)

16.3 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,91V 5%,BIDIR,SMC TVS

1.5SMC91CAHE3_A/I
Vishay Semiconductors
1: $2.11
3,425In Stock

Mfr. Part No.
1.5SMC91CAHE3_A/I

Mouser Part No
78-1.5SMC91CAHE3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,91V 5%,BIDIR,SMC TVS

Learn More

Datasheet

3,425In Stock

Cut Tape

$2.11

$1.33

$0.879

$0.688

Reel

$0.602

View

Min.: 1
Mult.: 1

: 3,500

Bidirectional

1 Channel

SMD/SMT

125 V

86.5 V

SMC (DO-214AB)

12 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,150V 5%,BIDIR,SMC TVS

1.5SMC150CAHE3_A/I
Vishay Semiconductors
1: $2.11
3,477In Stock

Mfr. Part No.
1.5SMC150CAHE3_A/I

Mouser Part No
78-1.5SMC150CAHE3A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,150V 5%,BIDIR,SMC TVS

Learn More

Datasheet

3,477In Stock

Cut Tape

$2.11

$1.33

$0.879

$0.688

Reel

$0.602

View

Min.: 1
Mult.: 1

: 3,500

Bidirectional

1 Channel

SMD/SMT

207 V

143 V

SMC (DO-214AB)

7.2 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,39V 5%,UNIDIR,SMC TVS

1.5SMC39AHM3_A/I
Vishay Semiconductors
1: $1.73
3,218In Stock

Mfr. Part No.
1.5SMC39AHM3_A/I

Mouser Part No
78-1.5SMC39AHM3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,39V 5%,UNIDIR,SMC TVS

Learn More

Datasheet

3,218In Stock

Cut Tape

$1.73

$1.09

$0.714

$0.556

Reel

$0.461

View

Min.: 1
Mult.: 1

: 3,500

Unidirectional

1 Channel

SMD/SMT

53.9 V

37.1 V

SMC (DO-214AB)

27.8 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,43V 5%,UNIDIR,SMC TVS

1.5SMC43CAHE3_A/I
Vishay Semiconductors
1: $2.11
3,470In Stock

Mfr. Part No.
1.5SMC43CAHE3_A/I

Mouser Part No
78-1.5SMC43CAHE3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,43V 5%,UNIDIR,SMC TVS

Learn More

Datasheet

3,470In Stock

Cut Tape

$2.11

$1.33

$0.879

$0.688

Reel

$0.602

View

Min.: 1
Mult.: 1

: 3,500

Bidirectional

1 Channel

SMD/SMT

SMC (DO-214AB)

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,56V 5%,UNIDIR,SMC TVS

1.5SMC56AHM3_A/I
Vishay Semiconductors
1: $1.73
3,348In Stock

Mfr. Part No.
1.5SMC56AHM3_A/I

Mouser Part No
78-1.5SMC56AHM3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,56V 5%,UNIDIR,SMC TVS

Learn More

Datasheet

3,348In Stock

Cut Tape

$1.73

$1.09

$0.714

$0.556

Reel

$0.461

View

Min.: 1
Mult.: 1

: 3,500

Unidirectional

1 Channel

SMD/SMT

77 V

53.2 V

SMC (DO-214AB)

19.5 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,7.5V 5%,UNIDIR,SMC TVS

1.5SMC7.5AHM3_A/I
Vishay Semiconductors
1: $2.05
3,350In Stock

Mfr. Part No.
1.5SMC7.5AHM3_A/I

Mouser Part No
78-1.5SMC7.5AHM3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,7.5V 5%,UNIDIR,SMC TVS

Learn More

Datasheet

3,350In Stock

Cut Tape

$2.05

$1.29

$0.855

$0.67

Reel

$0.586

View

Min.: 1
Mult.: 1

: 3,500

Unidirectional

1 Channel

6.4 V

SMD/SMT

11.3 V

7.5 V

SMC (DO-214AB)

133 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,12V 5%,UNIDIR,SMC TVS

1.5SMC12AHE3_A/I
Vishay Semiconductors
1: $1.63
3,140In Stock

Mfr. Part No.
1.5SMC12AHE3_A/I

Mouser Part No
78-1.5SMC12AHE3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,12V 5%,UNIDIR,SMC TVS

Learn More

Datasheet

3,140In Stock

Cut Tape

$1.63

$1.02

$0.669

$0.518

Reel

$0.407

View

Min.: 1
Mult.: 1

: 3,500

Unidirectional

1 Channel

10.2 V

SMD/SMT

16.7 V

12.6 V

SMC (DO-214AB)

89.8 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,130V 5%,UNIDIR,SMC TVS

1.5SMC130AHM3_A/I
Vishay Semiconductors
1: $1.73
3,480In Stock

Mfr. Part No.
1.5SMC130AHM3_A/I

Mouser Part No
78-1.5SMC130AHM3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,130V 5%,UNIDIR,SMC TVS

Learn More

Datasheet

3,480In Stock

Cut Tape

$1.73

$1.09

$0.714

$0.556

Reel

$0.461

View

Min.: 1
Mult.: 1

: 3,500

Unidirectional

1 Channel

SMD/SMT

179 V

124 V

SMC (DO-214AB)

8.4 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape

ESD Protection Diodes / TVS Diodes 1.5KW,22V 5%,UNIDIR,SMC TVS

1.5SMC22AHE3_A/I
Vishay Semiconductors
1: $1.63
3,095In Stock

Mfr. Part No.
1.5SMC22AHE3_A/I

Mouser Part No
78-1.5SMC22AHE3_A/I

Vishay Semiconductors

ESD Protection Diodes / TVS Diodes 1.5KW,22V 5%,UNIDIR,SMC TVS

Learn More

Datasheet

3,095In Stock

Cut Tape

$1.63

$1.02

$0.669

$0.589

Reel

$0.407

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,500

Unidirectional

1 Channel

SMD/SMT

30.6 V

23.1 V

SMC (DO-214AB)

49 A

1.5 kW

- 65 C

+ 150 C

1.5SMC

Reel, Cut Tape, MouseReel

1.5SMC TRANSZORB® Transient Voltage Suppressors

Customer Service Office

Company

Resources

Support

5.8 V
6.4 V
7.02 V
7.78 V
8.55 V
9.4 V
10.2 V
11.1 V
12.8 V
13.6 V
15.3 V
17.1 V
18.8 V
20.5 V
23.1 V
25.6 V
28.2 V
30.8 V
33.3 V
36.8 V

10.5 V
11.3 V
12.1 V
13.4 V
14.5 V
15.6 V
16.7 V
18.2 V
21.2 V
22.5 V
25.2 V
27.7 V
30.6 V
33.2 V
37.5 V
41.4 V
45.7 V
49.9 V
53.9 V
59.3 V

6.45 V
6.8 V
7.13 V
7.5 V
7.79 V
8.65 V
9.5 V
10.5 V
11.4 V
11.6 V
12.4 V
12.6 V
13.7 V
14.3 V
15.2 V
15.8 V
16.8 V
17.1 V
18.9 V
19 V

2.03 A
2.15 A
2.28 A
2.5 A
2.7 A
3.1 A
3.6 A
4.4 A
4.6 A
5.5 A
6.1 A
6.4 A
6.8 A
7.2 A
8.4 A
9.1 A
9.9 A
10.9 A
12 A
13.3 A