Littelfuse, Inc. Datasheets for Reed Switches

Reed switches are magnetically actuated switches. They are typically manufactured with two ferromagnetic reeds (contact blades), which are sealed in a glass capsule. In the presence of a magnet, the blades (contacts) close.
Reed Switches: Learn more

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Product Name	Notes
MDCG-4-12-38 MDCG-4-17-38 MDCG-4-22-38 MDCG-4-37-43 MDCG-4-7-13 MDCG-4-7-18 MDRR-DT-15-35-U MDRR-DT-15-40-F MDRR-DT-20-40-F MDRR-DT-25-35-F MDRR-DT-25-35-U MDRR-DT-30-35-F MDRR-DT-30-35-U MDRR-DT-35-40-F MDRR-DT-35-40-U MDRR-DT-40-45-F MDSM-4B-12-28 MDSM-4B-12-38 MDSM-4B-17-38 MDSM-4B-22-38 MDSM-4R-12-28 MDSM-4R-12-38 MDSM-4R-17-38 MDSM-4R-22-38 MDSM-4R-7-13 MDSM-DTB-10-15 MDSM-DTB-15-25 MDSM-DTB-20-30 MDSM-DTR-10-15 MDSM-DTR-15-25 MDSM-DTR-20-30 MDSR-10-25-30 MDSR-10-30-35 MDSR-10-8-10 MDSR-10-AW-10-15 MDSR-10-AW-20-25 MDSR-4-12-18 MDSR-4-12-23 MDSR-4-12-28 MDSR-4-12-38 MDSR-4-17-23 MDSR-4-17-28 MDSR-4-17-38 MDSR-4-22-28 MDSR-4-22-33 MDSR-4-22-38 MDSR-4-27-33 MDSR-4-27-38 MDSR-4-32-38 MDSR-7-10-20 MDSR-7-15-25 MDSR-7-25-30 MDSR-7-8-10 MDSR-7-Q2496-1 MISM-3V1R-8-12.5 MISM-7B5-10-15 MISM-7B5-6-10 MISM-7B5-8-12.5 MISM-7R-8-12.5 MITI-3V1-6-12.5 MITI-3V1-6-15 MITI-3V1-6-8 MITI-3V1-8-12.5 MITI-7-6-8 MITI-7-8-12.5 MLRR-3-10-15 MLRR-3-12-18 MLRR-3-12-23 MLRR-3-12-28 MLRR-3-12-38 MLRR-3-17-38 MLRR-3-22-38 MLRR-3-27-48 MLRR-3-37-43 MLRR-3-42-48 MLRR-3-7-13 MLRR-4-12-18 MLRR-4-17-33 MLRR-4-17-38 MLRR-4-22-38 MLRR-4-32-43 MLRR-4-37-43 MRPR-20-22-38 MRPR-3-12-18 MRPR-3-17-23 MRPR-3-22-38 MRPR-3-42-48 MRPR-8-17-23 MVSR-20-12-18 MVSR-20-17-33 MVSR-20-22-38 MVSR-20-27-33-WR MVSR-20-37-43 MVSR-20-42-48 MVSR-20-Q1464 MVSR-20-Q1682-3 MVSR-20-Q1683-3 MVSR-20-Q1684-3 MVSR-20-Q2053 MVSR-20-Q4250 MVSR-20-Q4422 MVSR-20-Q4437 MVSR-20-Q489-2
14.7mm Changeover Reed Switch -- MDRR-DT-10-15-F 14.7mm Changeover Reed Switch -- MDRR-DT-10-15-U 14.7mm Changeover Reed Switch -- MDRR-DT-15-20-F 14.7mm Changeover Reed Switch -- MDRR-DT-15-20-U 14.7mm Changeover Reed Switch -- MDRR-DT-15-25-U 14.7mm Changeover Reed Switch -- MDRR-DT-15-30-F 14.7mm Changeover Reed Switch -- MDRR-DT-15-30-U 14.7mm Changeover Reed Switch -- MDRR-DT-20-25-F 14.7mm Changeover Reed Switch -- MDRR-DT-20-25-U 14.7mm Changeover Reed Switch -- MDRR-DT-20-30-F 14.7mm Changeover Reed Switch -- MDRR-DT-20-30-U 14.7mm Changeover Reed Switch -- MDRR-DT-20-35-F 14.7mm Changeover Reed Switch -- MDRR-DT-25-30-F 14.7mm Changeover Reed Switch -- MDRR-DT-25-30-U	A miniature changeover switch with a 14.73mm long x 2.54mm diameter (0.580" x 0.100") glass envelope. Capable of switching 175Vdc at 5W. Available sensitivity range of 15-30 AT. Insulation resistance...
14.7mm Changeover Reed Switch -- MDRR-DT-10-20-F 14.7mm Changeover Reed Switch -- MDRR-DT-10-20-U 14.7mm Changeover Reed Switch -- MDRR-DT-15-25-F 14.7mm Changeover Reed Switch -- MDRR-DT-20-35-U	A miniature changeover switch with a 14.73mm long x 2.54mm diameter (0.580" x 0.100") glass envelope. Capable of switching 175Vdc at 5W. Available sensitivity rangeof 15-30 AT. Insulation resistance of...
15.2mm High Power Reed Switch -- MLRR-3-17-23 15.2mm High Power Reed Switch -- MLRR-3-17-28 15.2mm High Power Reed Switch -- MLRR-3-22-28 15.2mm High Power Reed Switch -- MLRR-3-22-33 15.2mm High Power Reed Switch -- MLRR-3-27-33 15.2mm High Power Reed Switch -- MLRR-3-27-38 15.2mm High Power Reed Switch -- MLRR-3-32-38	A miniature, normally open switch with a 15.24mm long x 2.54mm diameter (0.600" x 0.100") glass envelope. Capable of switching 200Vdc at 20W with close-differential characteristics. Available sensitivity range of...
Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MRPR-3 - MRPR-3-22-28 -- MRPR-3-22-28 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MRPR-3 - MRPR-3-22-33 -- MRPR-3-22-33 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MRPR-3 - MRPR-3-27-33 -- MRPR-3-27-33 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MRPR-3 - MRPR-3-27-38 -- MRPR-3-27-38 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MRPR-3 - MRPR-3-32-38 -- MRPR-3-32-38 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MRPR-3 - MRPR-3-32-43 -- MRPR-3-32-43 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MRPR-3 - MRPR-3-37-43 -- MRPR-3-37-43	A miniature, normally open switch with a 19.69mm long x 2.84mm diameter (0.770" x .112") glass envelope. Capable of switching up to 200Vdc at 50W. It is rated to carry...
Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MRPR-8 - MRPR-8-22-28 -- MRPR-8-22-28 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MRPR-8 - MRPR-8-22-33 -- MRPR-8-22-33 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MRPR-8 - MRPR-8-22-43 -- MRPR-8-22-43 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MRPR-8 - MRPR-8-27-33 -- MRPR-8-27-33 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MRPR-8 - MRPR-8-27-38 -- MRPR-8-27-38 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MRPR-8 - MRPR-8-32-38 -- MRPR-8-32-38 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MRPR-8 - MRPR-8-32-43 -- MRPR-8-32-43 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MRPR-8 - MRPR-8-37-43 -- MRPR-8-37-43	A miniature, normally open switch with a 20.32mm long x 2.84mm diameter (0.800" x 0.112") glass envelope. Capable of high voltage and power switching of 265Vac at 50VA. It is...
14.7mm Surface Mount Changeover Reed Switch -- MDSM-DTB-15-20 14.7mm Surface Mount Changeover Reed Switch -- MDSM-DTB-15-30 14.7mm Surface Mount Changeover Reed Switch -- MDSM-DTB-20-25 14.7mm Surface Mount Changeover Reed Switch -- MDSM-DTR-15-20 14.7mm Surface Mount Changeover Reed Switch -- MDSM-DTR-15-30 14.7mm Surface Mount Changeover Reed Switch -- MDSM-DTR-20-25 14.7mm Surface Mount Changeover Reed Switch -- MDSM-DTR-25-30 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MDSM-DT - MDSM-DTB-25-30 -- MDSM-DTB-25-30	A miniature, surface mount, changeover switch with a 14.73mm long x 2.54mm diameter (0.580" x 0.100") glass envelope. Capable of switching 175Vdc at 5W. Available sensitivity range of 15-30 AT.
15.2mm Surface Mount Reed Switch -- MLSM-3B-17-23 15.2mm Surface Mount Reed Switch -- MLSM-3B-17-28 15.2mm Surface Mount Reed Switch -- MLSM-3B-22-28 15.2mm Surface Mount Reed Switch -- MLSM-3B-22-33 15.2mm Surface Mount Reed Switch -- MLSM-3B-27-33 15.2mm Surface Mount Reed Switch -- MLSM-3B-27-38 15.2mm Surface Mount Reed Switch -- MLSM-3B-32-38 15.2mm Surface Mount Reed Switch -- MLSM-3R-17-23 15.2mm Surface Mount Reed Switch -- MLSM-3R-17-28 15.2mm Surface Mount Reed Switch -- MLSM-3R-22-28 15.2mm Surface Mount Reed Switch -- MLSM-3R-22-33 15.2mm Surface Mount Reed Switch -- MLSM-3R-27-33 15.2mm Surface Mount Reed Switch -- MLSM-3R-27-38 15.2mm Surface Mount Reed Switch -- MLSM-3R-32-38	A miniature, surface mount, normally open switch with a 15.24mm long x 2.54mm diameter (0.600" x 0.100") glass envelope. Capable of switching 200Vdc at 20W with close-differential characteristics. Available sensitivity...
10.2mm Reed Switch -- MDSR-10-10-15 10.2mm Reed Switch -- MDSR-10-10-25 10.2mm Reed Switch -- MDSR-10-15-20 10.2mm Reed Switch -- MDSR-10-20-25	A sub-miniature, normally open switch with a 10.16mm long x 1.80mm diameter (0.400" x 0.071") glass envelope. Capable of switching 200Vdc at 10W. Available sensitivity range of 10-25 AT. High...
12.7mm Reed Switch -- MDSR-7-10-15 12.7mm Reed Switch -- MDSR-7-10-25 12.7mm Reed Switch -- MDSR-7-15-20 12.7mm Reed Switch -- MDSR-7-20-25	A sub-miniature, normally open switch with a 12.70mm long x 1.80mm diameter (0.500" x 0.071") glass envelope. Capable of switching 200Vdc at 10W. Available sensitivity range of 10-25 AT. High...
15.3mm Reed Switch -- MDCG-4-17-23 15.3mm Reed Switch -- MDCG-4-17-28 15.3mm Reed Switch -- MDCG-4-22-28 15.3mm Reed Switch -- MDCG-4-22-33 15.3mm Reed Switch -- MDCG-4-27-33 15.3mm Reed Switch -- MDCG-4-27-38 15.3mm Reed Switch -- MDCG-4-32-38	A sub-miniature, normally open switch with a 15.24mm long x 2.28mm diameter (0.600" x 0.090") glass envelope. Capable of switching 200Vdc at 10W. Available sensitivity range of 12-38 AT. High...
15.2mm High Power Reed Switch -- MLRR-4-17-23 15.2mm High Power Reed Switch -- MLRR-4-17-28 15.2mm High Power Reed Switch -- MLRR-4-22-28 15.2mm High Power Reed Switch -- MLRR-4-22-33 15.2mm High Power Reed Switch -- MLRR-4-27-33 15.2mm High Power Reed Switch -- MLRR-4-27-38 15.2mm High Power Reed Switch -- MLRR-4-32-38	A sub-miniature, normally open switch with a 15.24mm long x 2.54mm diameter (0.600" x 0.100") glass envelope. Capable of switching 200Vdc at 20W with close-differential characteristics. Available sensitivity range of...
10.2mm Surface Mount Reed Switch -- MDSM-10B-10-15 10.2mm Surface Mount Reed Switch -- MDSM-10B-10-25 10.2mm Surface Mount Reed Switch -- MDSM-10B-15-20 10.2mm Surface Mount Reed Switch -- MDSM-10B-20-25 10.2mm Surface Mount Reed Switch -- MDSM-10R-10-15 10.2mm Surface Mount Reed Switch -- MDSM-10R-10-25 10.2mm Surface Mount Reed Switch -- MDSM-10R-15-20 10.2mm Surface Mount Reed Switch -- MDSM-10R-20-25	A sub-miniature, surface mount, normally open switch with a 10.16mm long x 1.80mm diameter (0.400" x 0.071") glass envelope. Capable of switching 200Vdc at 10W. Available sensitivity range of 10-25...
15.3mm Surface Mount Reed Switch -- MDSM-4B-12-18 15.3mm Surface Mount Reed Switch -- MDSM-4B-12-23 15.3mm Surface Mount Reed Switch -- MDSM-4B-17-23 15.3mm Surface Mount Reed Switch -- MDSM-4B-22-28 15.3mm Surface Mount Reed Switch -- MDSM-4B-27-33 15.3mm Surface Mount Reed Switch -- MDSM-4B-32-38 15.3mm Surface Mount Reed Switch -- MDSM-4R-12-18 15.3mm Surface Mount Reed Switch -- MDSM-4R-12-23 15.3mm Surface Mount Reed Switch -- MDSM-4R-17-23 15.3mm Surface Mount Reed Switch -- MDSM-4R-17-28 15.3mm Surface Mount Reed Switch -- MDSM-4R-22-28 15.3mm Surface Mount Reed Switch -- MDSM-4R-22-33 15.3mm Surface Mount Reed Switch -- MDSM-4R-27-33 15.3mm Surface Mount Reed Switch -- MDSM-4R-32-38 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MDSM-4 - MDSM-4B-17-28 -- MDSM-4B-17-28 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MDSM-4 - MDSM-4B-22-33 -- MDSM-4B-22-33 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MDSM-4 - MDSM-4B-27-38 -- MDSM-4B-27-38 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MDSM-4 - MDSM-4R-27-38 -- MDSM-4R-27-38	A sub-miniature, surface mount, normally open switch with a 15.24mm long x 2.28mm diameter (0.600" x 0.090") glass envelope. Capable of switching 200Vdc at 10W. Available sensitivity range of 12-38...
15.2mm Surface Mount Reed Switch -- MLSM-4B-17-23 15.2mm Surface Mount Reed Switch -- MLSM-4B-17-28 15.2mm Surface Mount Reed Switch -- MLSM-4B-22-28 15.2mm Surface Mount Reed Switch -- MLSM-4B-22-33 15.2mm Surface Mount Reed Switch -- MLSM-4B-27-33 15.2mm Surface Mount Reed Switch -- MLSM-4B-27-38 15.2mm Surface Mount Reed Switch -- MLSM-4B-32-38 15.2mm Surface Mount Reed Switch -- MLSM-4R-17-23 15.2mm Surface Mount Reed Switch -- MLSM-4R-17-28 15.2mm Surface Mount Reed Switch -- MLSM-4R-22-28 15.2mm Surface Mount Reed Switch -- MLSM-4R-22-33 15.2mm Surface Mount Reed Switch -- MLSM-4R-27-33 15.2mm Surface Mount Reed Switch -- MLSM-4R-27-38 15.2mm Surface Mount Reed Switch -- MLSM-4R-32-38	A sub-miniature, surface mount, normally open switch with a 15.24mm long x 2.54mm diameter (0.600" x 0.100") glass envelope. Capable of switching 200Vdc at 20W with close-differential characteristics. Available sensitivity...
Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MITI-3V1 - MITI-3V1-6-10 -- MITI-3V1-6-10	An ultra-miniature, normally open switch with a 7.00mm long x 1.80mm diameter (0.276" x 0.071") glass envelope, capable of switching 170Vdc at 10W. Available sensitivity range of 6-10 AT. High...
7mm Reed Switches -- MITI-7-10-15 7mm Reed Switches -- MITI-7-15-20 7mm Reed Switches -- MITI-7-6-10	An ultra-miniature, normally open switch with a 7.00mm long x 1.80mm diameter (0.276" x 0.071") glass envelope, capable of switching 170Vdc at 10W. Available sensitivity range of 6-20 AT. High...
Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MISM-3V1 - MISM-3V1B-6-10 -- MISM-3V1B-6-10 Sensors - Fluid & Level & Position Sensors - Reed Switches - Series: MISM-3V1 - MISM-3V1R-6-10 -- MISM-3V1R-6-10	An ultra-miniature, surface mount, normally open switch with a 7.00mm long x 1.80mm diameter (0.276" x 0.071") glass envelope, capable of switching 170Vdc at 10W. Available sensitivity range of 6-10...
7mm Reed Switches -- MISM-7B-10-15 7mm Reed Switches -- MISM-7B-15-20 7mm Reed Switches -- MISM-7B-6-10 7mm Reed Switches -- MISM-7R-10-15 7mm Reed Switches -- MISM-7R-15-20 7mm Reed Switches -- MISM-7R-6-10	An ultra-miniature, surface mount, normally open switch with a 7.00mm long x 1.80mm diameter (0.276" x 0.071") glass envelope, capable of switching 170Vdc at 10W. Available sensitivity range of 6-20...
Long life > High Reliability > 7.0mm Reed Switch -- MISM-7LB-10-15 Long life > High Reliability > 7.0mm Reed Switch -- MISM-7LB-15-20 Long life > High Reliability > 7.0mm Reed Switch -- MISM-7LB-20-25 Long life > High Reliability > 7.0mm Reed Switch -- MISM-7LB-6-10 Long life > High Reliability > 7.0mm Reed Switch -- MISM-7LR-10-15 Long life > High Reliability > 7.0mm Reed Switch -- MISM-7LR-15-20 Long life > High Reliability > 7.0mm Reed Switch -- MISM-7LR-20-25 Long life > High Reliability > 7.0mm Reed Switch -- MISM-7LR-6-10 Long life > High Reliability > 7.0mm Reed Switch -- MITI-7L-10-15 Long life > High Reliability > 7.0mm Reed Switch -- MITI-7L-15-20 Long life > High Reliability > 7.0mm Reed Switch -- MITI-7L-20-25 Long life > High Reliability > 7.0mm Reed Switch -- MITI-7L-6-10	The MITI-7L ultra-miniature reed switch is a normally open switch with a 7 mm x 1.8 mm (0.276” x 0.071”) glass envelope, which can switch up to 10 W. It...
20.32mm High Voltage and High Power Reed Switch -- MRPR-20-17-23 20.32mm High Voltage and High Power Reed Switch -- MRPR-20-17-28 20.32mm High Voltage and High Power Reed Switch -- MRPR-20-17-43 20.32mm High Voltage and High Power Reed Switch -- MRPR-20-22-28 20.32mm High Voltage and High Power Reed Switch -- MRPR-20-22-33 20.32mm High Voltage and High Power Reed Switch -- MRPR-20-22-43 20.32mm High Voltage and High Power Reed Switch -- MRPR-20-27-33 20.32mm High Voltage and High Power Reed Switch -- MRPR-20-27-38 20.32mm High Voltage and High Power Reed Switch -- MRPR-20-32-38 20.32mm High Voltage and High Power Reed Switch -- MRPR-20-32-43 20.32mm High Voltage and High Power Reed Switch -- MRPR-20-37-43	The MRPR-20 Reed Switch is a miniature, normally open switch with a 20.32mm long x 2.84mm diameter (0.800” x 0.112”) glass envelope, capable of high voltage and power switching of...
19.7mm High Voltage Reed Switch -- MVSR-20-17-23 19.7mm High Voltage Reed Switch -- MVSR-20-17-28 19.7mm High Voltage Reed Switch -- MVSR-20-22-28 19.7mm High Voltage Reed Switch -- MVSR-20-22-33 19.7mm High Voltage Reed Switch -- MVSR-20-27-33 19.7mm High Voltage Reed Switch -- MVSR-20-27-38 19.7mm High Voltage Reed Switch -- MVSR-20-32-38 19.7mm High Voltage Reed Switch -- MVSR-20E 19.7mm High Voltage Reed Switch -- MVSR-20EH	The MVSR-20 Reed Switch is a miniature, normally open switch with a 19.69mm long x 2.66mm diameter (0.775" x 0.105") glass envelope, capable of high voltage switching up to 1kVdcat...

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