Block Varistors

Product Top Page

Search by Characteristics

Search by Part Number

Technical Support Tools

B72240B0381K001

Product Status	Production
Applications	IndustrialIndustrial
Type	B40K385
Brand	TDK
Environmental Compliance Click to learn more about these icons

Voltage Protection Devices,Block Varistors:B40

Images are for reference only and show example products.

3D Model

Size

Detail Size Information

Please refer to the catalog

Electrical Characteristics

Maximum Operating Voltage [DC]	505V
Maximum Operating Voltage [AC]	385Vrms
Maximum Surge Current Imax [8/20µs, 1time]	40kA
Energy Absorption	800J
Capacitance (Typ.)	1.9nF

Other

Operating Temperature Range	Please refer to the catalog
Soldering Method	Please refer to the document (Soldering Instructions)
Safety Standard	Please refer to the document (Approvals)
Packing Information	Please refer to the document (Taping, Packaging and Lead Configuration)

Distributor Stock Info

Save Page as PDF

Distributor List

Contact Us

Part Number: B72240B0381K001

Part Number	Distributor	Buy from Distributor	Stock Quantity	Country	Info Last Updated
B72240B0381K001	element14 Click to know about this distributor	Buy Now	18	SG	2026/05/12
B72240B0381K001	Buerklin GmbH & Co. Click to know about this distributor	Buy Now	32	DE	2026/05/13
B72240B0381K001	Farnell, An Avnet Company Click to know about this distributor	Buy Now	18	Multiple	2026/05/13
B72240B0381K001	Mouser Electronics Inc. Click to know about this distributor	Buy Now	65	Multiple	2026/05/13
B72240B0381K001	RS Click to know about this distributor	Buy Now	14	GB	2026/05/13

Part Number:

B72240B0381K001

B72240B0381K001

Distributor	element14
Buy from Distributor	Buy Now
Stock Quantity	18
Country	SG
Info Last Updated	2026/05/12

B72240B0381K001

Distributor	Buerklin GmbH & Co.
Buy from Distributor	Buy Now
Stock Quantity	32
Country	DE
Info Last Updated	2026/05/13

B72240B0381K001

Distributor	Farnell, An Avnet Company
Buy from Distributor	Buy Now
Stock Quantity	18
Country	Multiple
Info Last Updated	2026/05/13

B72240B0381K001

Distributor	Mouser Electronics Inc.
Buy from Distributor	Buy Now
Stock Quantity	65
Country	Multiple
Info Last Updated	2026/05/13

B72240B0381K001

Distributor	RS
Buy from Distributor	Buy Now
Stock Quantity	14
Country	GB
Info Last Updated	2026/05/13

Please check the latest information on each distributor's website. Powered netCOMPONENTS

Tech Info

Collapse all Expand all

Documents

Technical Support Tools

Characteristic Graph

This data is for reference only and does not guarantee product characteristics.

Loading graph, please wait...

Voltage vs. Current

Graph Settings

X

Log Linear

Auto to

Y

Log Linear

Auto to

Customer who viewed this product also viewed

Chip Varistors / Ceramic Transient Voltage Suppressors

B72540T0040M062

Maximum continuous voltage=5.5V

Maximum Clamping Voltage (8/20μs)=17V

Chip Varistors / Ceramic Transient Voltage Suppressors

B72540T0110K062

Maximum continuous voltage=14V

Maximum Clamping Voltage (8/20μs)=33V

Chip Varistors / Ceramic Transient Voltage Suppressors

B72542V6600K062

Maximum continuous voltage=85V

Maximum Clamping Voltage (8/20μs)=140V

Chip Varistors / Ceramic Transient Voltage Suppressors

B72580T0040M062

Maximum continuous voltage=5.5V

Maximum Clamping Voltage (8/20μs)=17V

Leaded Disk Varistors

B72207S0151K101

Max. Operating Voltage [AC]=150Vrms

Max. Surge Current Imax(8/20μs,1time)=1200A

Leaded Disk Varistors

B72220S1170K102

Max. Operating Voltage [AC]=17Vrms

Max. Surge Current Imax(8/20μs,1time)=2000A

Surge Arresters

B88069X1793T502

2 electrodes Arresters

Nominal DC sparkover voltage = 4500V

Surge Arresters

B88069X2641S102

2 electrodes Arresters

Nominal DC sparkover voltage = 800V

Surge Arresters

B88069X2643B252

2 electrodes Arresters

Nominal DC sparkover voltage = 4500V

Surge Arresters

B88069X2900C103

2 electrodes Arresters

Nominal DC sparkover voltage = 600V