Magnetic Actuators

Littelfuse
Littlefuse-Magnetic-Actuators

Littelfuse offers a wide range of magnetic actuators that are packaged in shapes similar to the relative mating sensors. We also offer a limited family of bare magnets with various grades of materials, including ferrite (ceramic), AlNiCo and neodymium iron boron (NdFeB) materials.

Rectangular Actuators

These rectangular bare magnets and packaged actuators are ideally suited for mounting on a flat surface. They are suitable for use in a wide range of environments, including high-temperature applications.

Product SeriesDescriptionOverall DimensionsMaterialRetentivityCoercivityRecommended Operating Temp.Buy Now
mm (inch)˚C
L x W x HGaussOerstedMax
H-31AlNiCo Magnet12.70 (0.500) x 1.60 (0.062) x 1.60 (0.062)AlNiCo-510,900620450
H-32AlNiCo Magnet25.40 (1.000) x 4.80 (0.190) x 4.80 (0.190)AlNiCo-510,900620450
H-33AlNiCo Magnet19.10 (0.750) x 3.20 (0.120) x 3.20 (0.120)AlNiCo-510,900620450
H-34AlNiCo Magnet25.40 (1.000) x 6.35 (0.250) x 6.35 (0.250)AlNiCo-510,900620450
H-40Neodymium Magnet7.62 (0.300) x 3.18 (0.125) x 3.18 (0.125)NdFeB 45H13,30011,800120
H-41Neodymium Magnet19.05 (0.750) x 3.18 (0.125) x 3.18 (0.125)NdFeB 35H11,70010,800120
H-58Neodymium Magnet21.00 (0.827) x 7.00 (0.276) x 4.70 (0.185)NdFeB 35H11,70010,800120
57105Actuator for Terminal Flange Mount Sensor40.17 (1.582) x 19.05 (0.750) x 6.35 (0.250)AlNiCo-511,000620105
57125Actuator for Pinned Flange Mount Sensor28.57 (1.125) x 19.05 (0.750) x 6.35 (0.250)AlNiCo-511,000620105
57135Actuator for High-Temp Flange Mount Sensor28.57 (1.125) x 19.05 (0.750) x 6.35 (0.250)AlNiCo-512,800640150
57140Actuator for Mini Flange Mount Sensor23.00 (0.906) x 14.00 (0.551) x 6.00 (0.236)AlNiCo-511,000620105
57141Actuator for Mini Flange Mount Sensor23.00 (0.906) x 14.00 (0.551) x 6.00 (0.236)AlNiCo-511,000620105
57142Actuator for Mini Flange Mount Sensor23.00 (0.906) x 14.00 (0.551) x 6.00 (0.236)NdFeB 35H11,70010,800105
57145Actuator for Flange Mount Sensor28.57 (1.125) x 19.05 (0.750) x 6.35 (0.250)AlNiCo-511,000620105
57150Actuator for Flange Mount Sensor28.57 (1.125) x 19.05 (0.750) x 6.35 (0.250)AlNiCo-511,000620105
57045Actuator for Mini PCB Mount Overmolded17.78 (0.700) x 3.30 (0.130) x 4.32 (0.170)AlNiCo-511,000620105
57050Actuator for PCB Mount Overmolded22.86 (0.900) x 4.57 (0.180) x 4.57 (0.180)AlNiCo-511,000620105

Cylindrical Actuators

Designed for mounting on a frame, these cylindrical bare magnets and packaged actuators are appropriate for use in a wide range of environments, including high-temperature applications

Product SeriesDescriptionOverall DimensionsMaterialRetentivityCoercivityRecommended Operating Temp.Buy Now
mm (inch)˚C
Ø x LGaussOerstedMax
H-35Neodymium Magnet6.35 (0.250) x 6.35 (0.250)NdFeB 35H11,70010,800120
H-48Neodymium Magnet4.40 (0.173) x 6.00 (0.236)NdFeB 35SH11,70010,800150
CM-1Ceramic Magnet12.70 (0.500) x 5.08 (0.200)Ceramic-53,9002,400250
H-36AlNiCo Magnet4.60 (0.182) x 25.40 (1.000)AlNiCo-512,800640450
H-315AlNiCo Magnet3.00 (0.118) x 15.00 (0.590)AlNiCo-511,000620450
H-420AlNiCo Magnet4.00 (0.157) x 20.0 (0.787)AlNiCo-511,000620450
H-625AlNiCo Magnet6.00 (0.236) x 25.0 (0.984)AlNiCo-511,000620450
57020Actuator for Mini Firecracker5.10 (0.201) x 15.24 (0.600)AlNiCo-511,000620105
57022Actuator for Firecracker5.80 (0.228) x 25.40 (1.000)AlNiCo-511,000620105
57025Actuator for Firecracker6.22 (0.245) x 25.40 (1.000)AlNiCo-511,000620105
57030Actuator for Long Firecracker6.22 (0.245) x 38.10 (1.500)AlNiCo-511,000620105
57040Actuator for Firecracker with Retaining Ribs10.70 (0.420) x 31.00 (1.220)NdFeB 35H11,70010,800105
57060Actuator for Stainless Steel Threaded Barrel SensorM8 x 1.25 Pitch x 36.00 (1.420)AlNiCo-511,000620105
57065Actuator for Threaded Barrel Sensor (Standard)(5/16 x 24) Pitch x 38.10 (1.500)AlNiCo-511,000620105
57070Actuator for Threaded Barrel Sensor (Metric)M8 x 1.25 Pitch x 38.10 (1.500)AlNiCo-511,000620105
57075Actuator for Heavy Duty Threaded Barrel SensorM12 x 1.00 Pitch x 46.00 (1.810)Ceramic-22,9002,400105