Thermal Cutoffs – Mouser Peru

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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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Part #

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 90C switch temp.

B12A09005L310100
Microtherm Sentronic
1: S/33.55
403In Stock
500Expected 8/21/2026

Mfr. Part #
B12A09005L310100

Mouser Part #
256-B12A09005L310100

Microtherm Sentronic

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 90C switch temp.

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Datasheet

403In Stock

500Expected 8/21/2026

S/33.55

S/29.08

S/23.47

S/19.85

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp.

B12A12505L310100U186
Microtherm Sentronic
1: S/34.95
590In Stock

Mfr. Part #
B12A12505L310100U186

Mouser Part #
256-B2A2505L3000U86

Microtherm Sentronic

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp.

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Datasheet

590In Stock

S/34.95

S/30.28

S/24.44

S/20.71

View

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: S/24.37
609In 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.

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Datasheet

609In Stock

S/24.37

S/20.55

S/19.07

S/17.32

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp.

B12A12505L310100U253
Microtherm Sentronic
1: S/35.19
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

Datasheet

993In Stock

S/35.19

S/30.48

S/24.60

S/20.86

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 160C switch temp.

B12A16005 L370100
Microtherm Sentronic
1: S/33.51
1,016In Stock

Mfr. Part #
B12A16005 L370100

Mouser Part #
256-B12A16005L310100

Microtherm Sentronic

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 160C switch temp.

Learn More

Datasheet

1,016In Stock

S/33.51

S/29.04

S/23.43

S/19.85

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 140C switch temp.

B12A14005L310100U253
Microtherm Sentronic
1: S/35.23
968In Stock

Mfr. Part #
B12A14005L310100U253

Mouser Part #
256-B2A4005L3000U253

Microtherm Sentronic

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 140C switch temp.

Learn More

Datasheet

968In Stock

S/35.23

S/30.52

S/24.64

S/20.86

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 160C switch temp.

B12A16005 L370100U186
Microtherm Sentronic
1: S/34.92
999In Stock

Mfr. Part #
B12A16005 L370100U186

Mouser Part #
256-B2A6005L3000UU86

Microtherm Sentronic

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 160C switch temp.

Learn More

Datasheet

999In Stock

S/34.92

S/30.24

S/24.41

S/20.71

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 140C switch temp.

B12A14005L310100U112
Microtherm Sentronic
1: S/34.53
901In Stock

Mfr. Part #
B12A14005L310100U112

Mouser Part #
256-B2A4005L3000U2

Microtherm Sentronic

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 140C switch temp.

Learn More

Datasheet

901In Stock

S/34.53

S/29.93

S/24.13

S/20.47

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 160C switch temp.

B12A16005 L370100U112
Microtherm Sentronic
1: S/34.53
979In Stock

Mfr. Part #
B12A16005 L370100U112

Mouser Part #
256-B2A6005L3000U2

Microtherm Sentronic

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 160C switch temp.

Learn More

Datasheet

979In Stock

S/34.53

S/29.93

S/24.13

S/20.47

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 155C switch temp.

B12A15505 L370100U253
Microtherm Sentronic
1: S/35.19
1,000In Stock

Mfr. Part #
B12A15505 L370100U253

Mouser Part #
256-B2A5505L3000U253

Microtherm Sentronic

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 155C switch temp.

Learn More

Datasheet

1,000In Stock

S/35.19

S/30.48

S/24.60

S/20.86

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 160C switch temp.

B12A16005 L370100U253
Microtherm Sentronic
1: S/24.37
980In Stock

Mfr. Part #
B12A16005 L370100U253

Mouser Part #
256-B2A6005L3000U253

Microtherm Sentronic

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 160C switch temp.

Learn More

Datasheet

980In Stock

S/24.37

S/20.55

S/19.07

S/17.32

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 120C switch temp.

B12A12005L310100U253
Microtherm Sentronic
1: S/24.37
961In Stock

Mfr. Part #
B12A12005L310100U253

Mouser Part #
256-B2A2005L3000U253

Microtherm Sentronic

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 120C switch temp.

Learn More

Datasheet

961In Stock

S/24.37

S/20.55

S/19.07

S/17.32

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp.

B12A12505L310100U112
Microtherm Sentronic
1: S/23.94
926In Stock

Mfr. Part #
B12A12505L310100U112

Mouser Part #
256-B2A2505L3000U2

Microtherm Sentronic

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp.

Learn More

Datasheet

926In Stock

S/23.94

S/20.16

S/18.72

S/17.01

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 155C switch temp.

B12A15505 L370100U186
Microtherm Sentronic
1: S/34.92
897In Stock

Mfr. Part #
B12A15505 L370100U186

Mouser Part #
256-B2A5505L3000U86

Microtherm Sentronic

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 155C switch temp.

Learn More

Datasheet

897In Stock

S/34.92

S/30.24

S/24.41

S/20.71

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 70C switch temp.

B12A07005L310100
Microtherm Sentronic
1: S/33.51
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

Datasheet

5In Stock

S/33.51

S/29.04

S/23.43

S/19.85

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 155C switch temp.

B12A15505 L370100
Microtherm Sentronic
1: S/33.51
100In Stock

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

Datasheet

100In Stock

S/33.51

S/29.04

S/23.43

S/19.85

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 80C switch temp.

B12A08005L310100
Microtherm Sentronic
1: S/33.51
7In 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

Datasheet

7In Stock

S/33.51

S/29.04

S/23.43

S/19.85

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 125C switch temp.

B12A12505L310100
Microtherm Sentronic
1: S/33.51
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

Datasheet

95In Stock

S/33.51

S/29.04

S/23.43

S/19.85

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 110C switch temp.

B12A11005L310100
Microtherm Sentronic
1: S/23.24
72In 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

Datasheet

72In Stock

S/23.24

S/19.62

S/18.22

S/16.54

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 140C switch temp.

B12A14005L310100
Microtherm Sentronic
1: S/33.55
29In 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

Datasheet

29In Stock

S/33.55

S/29.08

S/23.47

S/19.85

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Open (NO), SPST 70C switch temp.

B12G07005L310100G402
Microtherm Sentronic
1: S/39.28
96In Stock

Mfr. Part #
B12G07005L310100G402

Mouser Part #
256-B2G75L3G42

Microtherm Sentronic

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Open (NO), SPST 70C switch temp.

Learn More

Datasheet

96In Stock

S/39.28

S/34.02

S/27.48

S/23.28

View

Min.: 1
Mult.: 1

B12G

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Open (NO), SPST 90C switch temp.

B12B09005L310100U112
Microtherm Sentronic
1: S/34.53
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

Datasheet

96In Stock

S/34.53

S/29.93

S/24.13

S/20.47

View

Min.: 1
Mult.: 1

B12B

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 80C switch temp.

B12A08005L310100U112
Microtherm Sentronic
1: S/34.57
316In Stock
823On Order

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

Datasheet

316In Stock

823On Order

S/34.57

S/29.97

S/24.17

S/20.47

View

Min.: 1
Mult.: 1

B12A

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Open (NO), SPST 95C switch temp.

B12B09505L310100U112
Microtherm Sentronic
1: S/34.53
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

Datasheet

95In Stock

S/34.53

S/29.93

S/24.13

S/20.47

View

Min.: 1
Mult.: 1

B12B

Bulk

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 180C switch temp.

B12A18005 L370100
Microtherm Sentronic
1: S/23.24
1,035In Stock

Mfr. Part #
B12A18005 L370100

Mouser Part #
256-B12A18005L310100

Microtherm Sentronic

Thermal Cutoffs Bi-metallic Disc, Thermal Switch, Normally Closed (NC), SPST 180C switch temp.

Learn More

Datasheet

1,035In Stock

S/23.24

S/19.62

S/18.22

S/16.54

View

Min.: 1
Mult.: 1

B12A

Bulk

B Series Bimetal Snap-Action Temperature Switches

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