Thermal Cut-offs – Mouser Estonia

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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 (EUR) Filter the results in the table by unit price based on your quantity.	Qty.	Series	Packaging
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 160C switch temp. B12A16005 L370100U186 Microtherm Sentronic 1: 7,72 € 999In Stock	Mfr. Part No. B12A16005 L370100U186 Mouser Part No 256-B2A6005L3000UU86	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 160C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	999In Stock	7,72 € 6,69 € 5,40 € 4,58 € View 4,45 € 3,75 € 3,59 € 3,08 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 140C switch temp. B12E14005L310100G714 Microtherm Sentronic 1: 9,59 € 1.009In Stock	Mfr. Part No. B12E14005L310100G714 Mouser Part No 256-B2E4005L3000G74	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 140C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	1.009In Stock	9,59 € 8,31 € 6,71 € 5,68 € View 5,53 € 4,66 € 4,45 € 3,83 €	Min.: 1 Mult.: 1	B12E	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 180C switch temp. B12A18005 L370100 Microtherm Sentronic 1: 7,41 € 1.035In Stock	Mfr. Part No. B12A18005 L370100 Mouser Part No 256-B12A18005L310100	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 180C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	1.035In Stock	7,41 € 6,42 € 5,19 € 4,39 € View 4,27 € 3,60 € 3,44 € 2,96 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 120C switch temp. B12A12005L310100U253 Microtherm Sentronic 1: 7,78 € 960In Stock	Mfr. Part No. B12A12005L310100U253 Mouser Part No 256-B2A2005L3000U253	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 120C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	960In Stock	7,78 € 6,74 € 5,44 € 4,61 € View 4,49 € 3,78 € 3,61 € 3,10 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp. B12A12505L310100U112 Microtherm Sentronic 1: 7,64 € 916In Stock	Mfr. Part No. B12A12505L310100U112 Mouser Part No 256-B2A2505L3000U2	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	916In Stock	7,64 € 6,62 € 5,34 € 4,52 € View 4,40 € 3,72 € 3,55 € 3,04 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp. B12E12505L310100G714 Microtherm Sentronic 1: 9,58 € 912In Stock	Mfr. Part No. B12E12505L310100G714 Mouser Part No 256-B2E2505L3000G74	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	912In Stock	9,58 € 8,30 € 6,70 € 5,68 € View 5,53 € 4,66 € 4,45 € 3,83 €	Min.: 1 Mult.: 1	B12E	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 150C switch temp. B12A15005 L370100 Microtherm Sentronic 1: 7,40 € 100In Stock	Mfr. Part No. B12A15005 L370100 Mouser Part No 256-B12A15005L310100	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 150C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	100In Stock	7,40 € 6,42 € 5,18 € 4,39 € View 4,27 € 3,60 € 3,44 € 2,96 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 140C switch temp. B12A14005L310100 Microtherm Sentronic 1: 7,41 € 27In Stock	Mfr. Part No. B12A14005L310100 Mouser Part No 256-B12A14005L310100	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 140C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	27In Stock	7,41 € 6,42 € 5,19 € 4,39 € View 4,27 € 3,60 € 3,44 € 2,96 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 70C switch temp. B12A07005L310100 Microtherm Sentronic 1: 7,40 € 5In Stock	Mfr. Part No. B12A07005L310100 Mouser Part No 256-B12A07005L310100	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 70C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	5In Stock	7,40 € 6,42 € 5,18 € 4,39 € View 4,27 € 3,60 € 3,44 € 2,96 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 110C switch temp. B12A11005L310100 Microtherm Sentronic 1: 5,13 € 62In Stock	Mfr. Part No. B12A11005L310100 Mouser Part No 256-B12A11005L310100	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 110C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	62In Stock	5,13 € 4,33 € 4,02 € 3,66 € View 3,40 € 3,16 € 2,93 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 80C switch temp. B12A08005L310100 Microtherm Sentronic 1: 7,40 € 5In Stock	Mfr. Part No. B12A08005L310100 Mouser Part No 256-B12A08005L310100	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 80C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	5In Stock	7,40 € 6,42 € 5,18 € 4,39 € View 4,27 € 3,60 € 3,44 € 2,96 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp. B12A12505L310100 Microtherm Sentronic 1: 7,40 € 95In Stock	Mfr. Part No. B12A12505L310100 Mouser Part No 256-B12A12505L310100	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	95In Stock	7,40 € 6,42 € 5,18 € 4,39 € View 4,27 € 3,60 € 3,44 € 2,96 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Open (NO), SPST 95C switch temp. B12B09505L310100U112 Microtherm Sentronic 1: 7,63 € 95In Stock	Mfr. Part No. B12B09505L310100U112 Mouser Part No 256-B2B09505L3000U2	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Open (NO), SPST 95C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	95In Stock	7,63 € 6,61 € 5,33 € 4,52 € View 4,40 € 3,72 € 3,55 € 3,04 €	Min.: 1 Mult.: 1	B12B	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Open (NO), SPST 90C switch temp. B12B09005L310100U112 Microtherm Sentronic 1: 7,63 € 96In Stock	Mfr. Part No. B12B09005L310100U112 Mouser Part No 256-B2B09005L3000U2	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Open (NO), SPST 90C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	96In Stock	7,63 € 6,61 € 5,33 € 4,52 € View 4,40 € 3,72 € 3,55 € 3,04 €	Min.: 1 Mult.: 1	B12B	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 140C switch temp. B12A14005L310100U186 Microtherm Sentronic 1: 7,71 € 669In Stock	Mfr. Part No. B12A14005L310100U186 Mouser Part No 256-B2A4005L3000U86	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 140C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	669In Stock	7,71 € 6,68 € 5,39 € 4,58 € View 4,45 € 3,75 € 3,59 € 3,08 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 150C switch temp. B12A15005 L370100U253 Microtherm Sentronic 1: 5,38 € 509In Stock	Mfr. Part No. B12A15005 L370100U253 Mouser Part No 256-B2A5005L3000U253	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 150C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	509In Stock	5,38 € 4,54 € 4,21 € 3,83 € View 3,56 € 3,31 € 3,08 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 150C switch temp. B12A15005 L370100U294 Microtherm Sentronic 1: 7,77 € 969In Stock	Mfr. Part No. B12A15005 L370100U294 Mouser Part No 256-B2A5005L3000U294	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 150C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	969In Stock	7,77 € 6,73 € 5,44 € 4,61 € View 4,49 € 3,78 € 3,61 € 3,10 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 160C switch temp. B12A16005 L370100U294 Microtherm Sentronic 1: 7,77 € 987In Stock	Mfr. Part No. B12A16005 L370100U294 Mouser Part No 256-B2A6005L3000U294	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 160C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	987In Stock	7,77 € 6,73 € 5,44 € 4,61 € View 4,49 € 3,78 € 3,61 € 3,10 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 110C switch temp. B12A11005L310100U112 Microtherm Sentronic 1: 7,63 € 90Expected 12/11/2026	Mfr. Part No. B12A11005L310100U112 Mouser Part No 256-B2A005L3000U2	Microtherm Sentronic	Thermal Cut-offs 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	7,63 € 6,61 € 5,33 € 4,52 € View 4,40 € 3,72 € 3,55 € 3,04 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 90C switch temp. B12A09005L310100U112 Microtherm Sentronic 1: 7,63 € 90Expected 12/11/2026	Mfr. Part No. B12A09005L310100U112 Mouser Part No 256-B2A09005L3000U2	Microtherm Sentronic	Thermal Cut-offs 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	7,63 € 6,61 € 5,33 € 4,52 € View 4,40 € 3,72 € 3,55 € 3,04 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 80C switch temp. B12E08005L310100G714 Microtherm Sentronic 1: 9,58 € 96Expected 12/18/2026	Mfr. Part No. B12E08005L310100G714 Mouser Part No 256-B2E08005L3000G74	Microtherm Sentronic	Thermal Cut-offs 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	9,58 € 8,30 € 6,70 € 5,68 € View 5,53 € 4,66 € 4,45 € 3,83 €	Min.: 1 Mult.: 1	B12E	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 90C switch temp. B12E09005L310100G714 Microtherm Sentronic 1: 9,58 € 96Expected 12/18/2026	Mfr. Part No. B12E09005L310100G714 Mouser Part No 256-B2E09005L3000G74	Microtherm Sentronic	Thermal Cut-offs 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	9,58 € 8,30 € 6,70 € 5,68 € View 5,53 € 4,66 € 4,45 € 3,83 €	Min.: 1 Mult.: 1	B12E	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 155C switch temp. B12A15505 L370100 Microtherm Sentronic 1: 7,40 € 50Expected 12/18/2026	Mfr. Part No. B12A15505 L370100 Mouser Part No 256-B12A15505L310100	Microtherm Sentronic	Thermal Cut-offs 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	7,40 € 6,42 € 5,18 € 4,39 € View 4,27 € 3,60 € 3,44 € 2,96 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 170C switch temp. B12A17005 L370100 Microtherm Sentronic 1: 7,40 € 90Expected 11/20/2026	Mfr. Part No. B12A17005 L370100 Mouser Part No 256-B12A17005L310100	Microtherm Sentronic	Thermal Cut-offs 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	7,40 € 6,42 € 5,18 € 4,39 € View 4,27 € 3,60 € 3,44 € 2,96 €	Min.: 1 Mult.: 1	B12A	Bulk
Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp. B12A12505L310100U294 Microtherm Sentronic 1: 7,78 € 80Expected 10/20/2026	Mfr. Part No. B12A12505L310100U294 Mouser Part No 256-B2A2505L3000U294	Microtherm Sentronic	Thermal Cut-offs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp. Learn More about Microtherm Sentronic b temperature switches	Datasheet	80Expected 10/20/2026	7,78 € 6,74 € 5,44 € 4,61 € View 4,49 € 3,78 € 3,61 € 3,10 €	Min.: 1 Mult.: 1	B12A	Bulk

B Series Bimetal Snap-Action Temperature Switches

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