Circuit Protection > TVS Diodes

SM4T21AY - STMicroelectronics

TVS DIODE 18V 39.3V SMA

Technical Details

Case/Package	DO-214AC
Diode Type	ZENER
Direction	Unidirectional
Height	2.45mm
Length	4.6mm
Max Breakdown Voltage	22.2V
Min Breakdown Voltage	20V
Max Operating Temperature	150°C
Min Operating Temperature	-55°C
Max Power Dissipation	400W
Max Reverse Leakage Current	200nA
Mount	Surface Mount
Number of Pins	2
Number of Unidirectional Channels	1
Package Quantity	1
Packaging	Tape and Reel
Peak Pulse Current	59A
Peak Pulse Power	400W
Polarity	Unidirectional
Power Line Protection	No
Reach SVHC Compliant	No
Reverse Standoff Voltage	18V
RoHS Compliant	Yes
Series	Automotive, AEC-Q101, SM4TY, TRANSIL™
Test Current	1mA
Width	2.9mm

Compliance

RoHS : Compliant

Images

STMicroelectronics SM4T21AY | Mouser

Mouser

Datasheets

Digikey

SM4T21AY datasheet (pdf, 231.4 KB)

SM4T21AY datasheet (pdf, 231.4 KB)

SM4T21AY datasheet (pdf, 231.4 KB)

Element14

SM4T21AY datasheet (pdf, 231.4 KB)

Lifecycle Status Indicator

Volume Production

Loading indicators

Alternatives (Possible Substitutes)

Manufacturer	Manufacturer Part No.	Lifecycle Status Indicator	Confidence
Littelfuse	SMAJ18A	Volume Production
Bourns	SMAJ18A	Volume Production
Littelfuse	SMAJ17A	Volume Production
STMicroelectronics	SMAJ18A-TR	Volume Production
ON Semiconductor	1SMA18AT3G	Volume Production
Vishay Semiconductors	SMAJ18A-E3/61	Volume Production
Multicomp	SMBJ18	Not Recommended for New Design
Multicomp	SMBJ18A	Volume Production
Diodes	SMAJ18A-13-F	Volume Production
Vishay Semiconductors	SMA5J18A-E3/61	Volume Production

See more alternatives See less alternatives

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Authorized Distributors

Distributor

SKU

History

Stock

USD

1

10

50

100

1000

10000

Buy

Arrow Electronics

US: 0

$

0.3194

Verical

US: 4,179

$

0.29

0.29

Mouser

US: 4,046

$

0.34

0.333

0.333

0.333

0.333

0.332

Digikey

US: 1,805

$

0.34

0.333

0.333

0.333

0.333

0.333

Digikey

US: 1,805

$

0.34

0.333

0.333

0.333

0.333

0.333

Digikey

US: 0

$

0.3328

Newark

US: 505

$

0.333

0.333

0.287

0.187

0.141

Avnet

US: 0

$

0.3503

Element14

SG: 505

$

0.3635

0.3635

0.3627

0.3612

0.3604

Farnell

GB: 505

$

0.3647

0.3647

0.3634

0.3606

0.3593

Anglia

GB: 0

$

0.1159

Associate Distributors

Distributor

SKU

Stock

USD

1

10

50

100

1000

10000

Buy

Component Stockers USA

US: 20,948

$

0.23

0.23

0.23

0.22

0.19

0.19

Weyland Electronics Group Pte. Ltd.

SG: 77

$

0.769

0.769

0.769

0.769

0.769

0.769

FlyWing Technology

HK: 1,846

$

0.2771

0.269

0.269

0.2608

0.2506

0.2506

RX Electronics Limited

CN: 51,563

$

0.773

0.773

0.683

0.621

0.621

Fmall Co. Limited

HK: 2,860

$

0.2792

0.2792

0.2792

0.2612

0.2462

0.2252

LCSC

CN: 42

$

0.5246

0.4775

0.4512

0.4223

0.3846

0.3846

Chipsmall Limited

CN: 299,891

$

0.9356

0.6237

0.6237

0.3742

0.3119

0.3119

SHENGYU ELECTRONICS

CN: 12,656

$

0.979

0.9594

0.9594

0.9301

0.9007

0.8615

LZChips

SM4T21AY-1176286-126

CN: 2,742

$

0.747

0.674

0.674

0.64

0.608

0.578

Classic Components

US: 7,700

$

Origin Data Global Limited

CN: 42

$

1.008

0.936

0.90

0.864

Lingto Electronic Ltd.

CN: 43,727

$

1.00

0.95

0.95

0.90

0.89

0.88

Sourceability

US: 84

$

Abacus Technologies

US: 0

$

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