Thermal Cutoffs – Mouser Japan

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B Series Bimetal Snap-Action Temperature Switches

Microtherm Sentronic B Series Bimetal Snap-Action Temperature Switches feature a bimetallic snap-disc with a fixed switching temperature as the switching mechanism. The function of these switches includes typically closed or normally open operation, commonly used as a temperature limiter to protect or control devices from overheating. The B Series offers a current rating of 1-13A max to 30A, up to 10,000 switching cycles, with various packaging options. These switches also feature non-current carrying brass contacts. Microtherm Sentronic B Series Bimetal Snap-Action Temperature Switches are ideal for motors, transformers, electronics, sensors, pumps, converters, and more applications.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (JPY) Filter the results in the table by unit price based on your quantity.	Qty.	Series	Packaging
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 90C switch temp. B12A09005L310100 Microtherm Sentronic 1: ¥1,431.8 633In Stock	Mfr. Part # B12A09005L310100 Mouser Part # 256-B12A09005L310100	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 90C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	633In Stock	¥1,431.8 ¥1,240.8 ¥1,001.6 ¥847.1 View ¥825.5 ¥696 ¥664.4 ¥571.4	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp. B12A12505L310100U253 Microtherm Sentronic 1: ¥1,503.2 993In Stock	Mfr. Part # B12A12505L310100U253 Mouser Part # 256-B2A2505L3000U253	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	993In Stock	¥1,503.2 ¥1,302.2 ¥1,051.4 ¥890.3 View ¥867 ¥730.8 ¥697.6 ¥599.6	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 70C switch temp. B12A07005L310100U253 Microtherm Sentronic 1: ¥1,503.2 875In Stock	Mfr. Part # B12A07005L310100U253 Mouser Part # 256-B2A75L3U253	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 70C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	875In Stock	¥1,503.2 ¥1,302.2 ¥1,051.4 ¥890.3 View ¥867 ¥730.8 ¥697.6 ¥599.6	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 70C switch temp. B12A07005L310100U294 Microtherm Sentronic 1: ¥1,503.2 729In Stock	Mfr. Part # B12A07005L310100U294 Mouser Part # 256-B2A75L3U294	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 70C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	729In Stock	¥1,503.2 ¥1,302.2 ¥1,051.4 ¥890.3 View ¥867 ¥730.8 ¥697.6 ¥599.6	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 70C switch temp. B12E07005L310100G714 Microtherm Sentronic 1: ¥1,852 747In Stock	Mfr. Part # B12E07005L310100G714 Mouser Part # 256-B2E07005L3000G74	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 70C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	747In Stock	¥1,852 ¥1,604.5 ¥1,295.6 ¥1,096.3 View ¥1,068 ¥900.3 ¥860.4 ¥739.1	Min.: 1 Mult.: 1	B12E	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 150C switch temp. B12E15005 L370100G714 Microtherm Sentronic 1: ¥1,852 982In Stock	Mfr. Part # B12E15005 L370100G714 Mouser Part # 256-B2E5005L3000G74	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 150C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	982In Stock	¥1,852 ¥1,604.5 ¥1,295.6 ¥1,096.3 View ¥1,068 ¥900.3 ¥860.4 ¥739.1	Min.: 1 Mult.: 1	B12E	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 80C switch temp. B12A08005L310100U112 Microtherm Sentronic 1: ¥1,475 1,027In Stock	Mfr. Part # B12A08005L310100U112 Mouser Part # 256-B2A08005L3000U2	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 80C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	1,027In Stock	¥1,475 ¥1,279 ¥1,031.5 ¥873.7 View ¥850.4 ¥717.6 ¥686 ¥588	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 150C switch temp. B12A15005 L370100U253 Microtherm Sentronic 1: ¥1,039.8 509In Stock	Mfr. Part # B12A15005 L370100U253 Mouser Part # 256-B2A5005L3000U253	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 150C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	509In Stock	¥1,039.8 ¥877 ¥813.9 ¥739.1 View ¥687.7 ¥639.5 ¥589.7 ¥500	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 70C switch temp. B12A07005L310100 Microtherm Sentronic 1: ¥1,430.1 5In Stock	Mfr. Part # B12A07005L310100 Mouser Part # 256-B12A07005L310100	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 70C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	5In Stock	¥1,430.1 ¥1,239.1 ¥999.9 ¥847.1 View ¥825.5 ¥696 ¥664.4 ¥571.4	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 80C switch temp. B12A08005L310100 Microtherm Sentronic 1: ¥1,430.1 5In Stock	Mfr. Part # B12A08005L310100 Mouser Part # 256-B12A08005L310100	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 80C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	5In Stock	¥1,430.1 ¥1,239.1 ¥999.9 ¥847.1 View ¥825.5 ¥696 ¥664.4 ¥571.4	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 110C switch temp. B12A11005L310100 Microtherm Sentronic 1: ¥991.6 62In Stock	Mfr. Part # B12A11005L310100 Mouser Part # 256-B12A11005L310100	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 110C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	62In Stock	¥991.6 ¥837.1 ¥777.3 ¥705.9 View ¥656.1 ¥609.6 ¥558.1 ¥473.4	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp. B12A12505L310100 Microtherm Sentronic 1: ¥1,430.1 95In Stock	Mfr. Part # B12A12505L310100 Mouser Part # 256-B12A12505L310100	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	95In Stock	¥1,430.1 ¥1,239.1 ¥999.9 ¥847.1 View ¥825.5 ¥696 ¥664.4 ¥571.4	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 140C switch temp. B12A14005L310100 Microtherm Sentronic 1: ¥1,431.8 27In Stock	Mfr. Part # B12A14005L310100 Mouser Part # 256-B12A14005L310100	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 140C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	27In Stock	¥1,431.8 ¥1,240.8 ¥1,001.6 ¥847.1 View ¥825.5 ¥696 ¥664.4 ¥571.4	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 150C switch temp. B12A15005 L370100 Microtherm Sentronic 1: ¥1,430.1 100In Stock	Mfr. Part # B12A15005 L370100 Mouser Part # 256-B12A15005L310100	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 150C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	100In Stock	¥1,430.1 ¥1,239.1 ¥999.9 ¥847.1 View ¥825.5 ¥696 ¥664.4 ¥571.4	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Open (NO), SPST 95C switch temp. B12B09505L310100U112 Microtherm Sentronic 1: ¥1,473.3 95In Stock	Mfr. Part # B12B09505L310100U112 Mouser Part # 256-B2B09505L3000U2	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Open (NO), SPST 95C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	95In Stock	¥1,473.3 ¥1,277.3 ¥1,029.8 ¥873.7 View ¥850.4 ¥717.6 ¥686 ¥588	Min.: 1 Mult.: 1	B12B	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Open (NO), SPST 90C switch temp. B12B09005L310100U112 Microtherm Sentronic 1: ¥1,473.3 96In Stock	Mfr. Part # B12B09005L310100U112 Mouser Part # 256-B2B09005L3000U2	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Open (NO), SPST 90C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	96In Stock	¥1,473.3 ¥1,277.3 ¥1,029.8 ¥873.7 View ¥850.4 ¥717.6 ¥686 ¥588	Min.: 1 Mult.: 1	B12B	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 140C switch temp. B12A14005L310100U186 Microtherm Sentronic 1: ¥1,489.9 669In Stock	Mfr. Part # B12A14005L310100U186 Mouser Part # 256-B2A4005L3000U86	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 140C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	669In Stock	¥1,489.9 ¥1,290.6 ¥1,041.4 ¥883.7 View ¥860.4 ¥724.2 ¥692.6 ¥594.6	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 150C switch temp. B12A15005 L370100U294 Microtherm Sentronic 1: ¥1,501.5 969In Stock	Mfr. Part # B12A15005 L370100U294 Mouser Part # 256-B2A5005L3000U294	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 150C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	969In Stock	¥1,501.5 ¥1,300.6 ¥1,049.8 ¥890.3 View ¥867 ¥730.8 ¥697.6 ¥599.6	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp. B12A12505L310100U294 Microtherm Sentronic 1: ¥1,503.2 79In Stock 1On Order	Mfr. Part # B12A12505L310100U294 Mouser Part # 256-B2A2505L3000U294	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	79In Stock 1On Order	¥1,503.2 ¥1,302.2 ¥1,051.4 ¥890.3 View ¥867 ¥730.8 ¥697.6 ¥599.6	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 110C switch temp. B12A11005L310100U112 Microtherm Sentronic 1: ¥1,473.3 90Expected 12/11/2026	Mfr. Part # B12A11005L310100U112 Mouser Part # 256-B2A005L3000U2	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 110C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	90Expected 12/11/2026	¥1,473.3 ¥1,277.3 ¥1,029.8 ¥873.7 View ¥850.4 ¥717.6 ¥686 ¥588	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 90C switch temp. B12A09005L310100U112 Microtherm Sentronic 1: ¥1,473.3 90Expected 12/11/2026	Mfr. Part # B12A09005L310100U112 Mouser Part # 256-B2A09005L3000U2	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 90C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	90Expected 12/11/2026	¥1,473.3 ¥1,277.3 ¥1,029.8 ¥873.7 View ¥850.4 ¥717.6 ¥686 ¥588	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 80C switch temp. B12E08005L310100G714 Microtherm Sentronic 1: ¥1,850.4 96Expected 12/18/2026	Mfr. Part # B12E08005L310100G714 Mouser Part # 256-B2E08005L3000G74	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 80C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	96Expected 12/18/2026	¥1,850.4 ¥1,602.9 ¥1,293.9 ¥1,096.3 View ¥1,068 ¥900.3 ¥860.4 ¥739.1	Min.: 1 Mult.: 1	B12E	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 90C switch temp. B12E09005L310100G714 Microtherm Sentronic 1: ¥1,850.4 96Expected 12/18/2026	Mfr. Part # B12E09005L310100G714 Mouser Part # 256-B2E09005L3000G74	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 90C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	96Expected 12/18/2026	¥1,850.4 ¥1,602.9 ¥1,293.9 ¥1,096.3 View ¥1,068 ¥900.3 ¥860.4 ¥739.1	Min.: 1 Mult.: 1	B12E	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 155C switch temp. B12A15505 L370100 Microtherm Sentronic 1: ¥1,430.1 50Expected 12/18/2026	Mfr. Part # B12A15505 L370100 Mouser Part # 256-B12A15505L310100	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 155C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	50Expected 12/18/2026	¥1,430.1 ¥1,239.1 ¥999.9 ¥847.1 View ¥825.5 ¥696 ¥664.4 ¥571.4	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 170C switch temp. B12A17005 L370100 Microtherm Sentronic 1: ¥1,430.1 90Expected 11/20/2026	Mfr. Part # B12A17005 L370100 Mouser Part # 256-B12A17005L310100	Microtherm Sentronic	Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 170C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	90Expected 11/20/2026	¥1,430.1 ¥1,239.1 ¥999.9 ¥847.1 View ¥825.5 ¥696 ¥664.4 ¥571.4	Min.: 1 Mult.: 1	B12A	Bulk

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B Series Bimetal Snap-Action Temperature Switches

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