Magnetic / Reed Switches

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MDCG-4 Reed Switches

Littelfuse MDCG-4 Reed Switches are sub-miniature, normally open switches measuring 15.24mm x 2.28mm (0.600" x 0.090"). These Littelfuse devices feature a glass envelope and are capable of switching 200V_DC at 10W. Other highlights include a sensitivity range of 7-43AT, high insulation resistance of 10¹⁰Ω, and low contact resistance of less than 100mΩ. Suitable applications include reed relays, security, metering, and limit sensing.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (CLP) Filter the results in the table by unit price based on your quantity.	Qty.	Switch Type	Contact Form	Operate Range	Voltage Rating AC	Color	Mounting Style	Termination Style	Packaging
Magnetic / Reed Switches Sub-Mini NO Switch MDCG-4-7-13 Littelfuse 1: $1.350 7.029In Stock	Mfr. Part # MDCG-4-7-13 Mouser Part # 934-MDCG-4-7-13	Littelfuse	Magnetic / Reed Switches Sub-Mini NO Switch Learn More about Littelfuse Hamlin MDCG 4	Datasheet	7.029In Stock	$1.350 $1.153 $1.067 $951 View $882 $833 $747 $730 $724	Min.: 1 Mult.: 1	Sub-Miniature	SPST	7 AT to 13 AT	140 VAC	Clear	PCB Mount	Axial	Bulk
Magnetic / Reed Switches SWITCH REED MDCG-4-27-33 Littelfuse 1: $1.471 8.976In Stock 13.000Expected 10/26/2026	Mfr. Part # MDCG-4-27-33 Mouser Part # 934-MDCG-427-33	Littelfuse	Magnetic / Reed Switches SWITCH REED Learn More about Littelfuse Hamlin MDCG 4	Datasheet	8.976In Stock 13.000Expected 10/26/2026	$1.471 $1.329 $1.219 $1.120 View $1.054 $1.010 $867 $830 $817	Min.: 1 Mult.: 1	Sub-Miniature	SPST	27 AT to 33 AT	140 VAC	Clear	PCB Mount	Axial	Bulk
Magnetic / Reed Switches Sub-Mini NO Switch MDCG-4-37-43 Littelfuse 1: $1.285 989In Stock	Mfr. Part # MDCG-4-37-43 Mouser Part # 934-MDCG-4-37-43	Littelfuse	Magnetic / Reed Switches Sub-Mini NO Switch Learn More about Littelfuse Hamlin MDCG 4	Datasheet	989In Stock	$1.285 $1.142 $1.053 $951 View $926 $894 $788 $772	Min.: 1 Mult.: 1	Sub-Miniature	SPST	37 AT to 43 AT	140 VAC	Clear	PCB Mount	Axial	Bulk
Magnetic / Reed Switches MDCG-4 12-18 MDCG-4-12-18 Littelfuse 1: $1.208 1.333In Stock	Mfr. Part # MDCG-4-12-18 Mouser Part # 934-MDCG-412-18	Littelfuse	Magnetic / Reed Switches MDCG-4 12-18 Learn More about Littelfuse Hamlin MDCG 4	Datasheet	1.333In Stock	$1.208 $1.055 $985 $951 View $882 $833 $832 $772	Min.: 1 Mult.: 1	Sub-Miniature	SPST	12 AT to 18 AT	140 VAC	Clear	PCB Mount	Axial	Bulk
Magnetic / Reed Switches SWITCH REED MDCG-4-12-23 Littelfuse 1: $1.350 1.152In Stock	Mfr. Part # MDCG-4-12-23 Mouser Part # 934-MDCG-412-23	Littelfuse	Magnetic / Reed Switches SWITCH REED Learn More about Littelfuse Hamlin MDCG 4	Datasheet	1.152In Stock	$1.350 $1.153 $1.050 $951 View $882 $875 $825 $772	Min.: 1 Mult.: 1	Sub-Miniature	SPST	12 AT to 23 AT	140 VAC	Clear	PCB Mount	Axial	Bulk
Magnetic / Reed Switches SWITCH REED MDCG-4-12-33 Littelfuse 1: $1.350 860In Stock	Mfr. Part # MDCG-4-12-33 Mouser Part # 934-MDCG-412-33	Littelfuse	Magnetic / Reed Switches SWITCH REED Learn More about Littelfuse Hamlin MDCG 4	Datasheet	860In Stock	$1.350 $1.142 $1.044 $941 View $872 $829 $788 $772	Min.: 1 Mult.: 1	Sub-Miniature	SPST	12 AT to 33 AT	140 VAC	Clear	PCB Mount	Axial	Bulk
Magnetic / Reed Switches MDCG-4 12-38 MDCG-4-12-38 Littelfuse 1: $1.350 69In Stock	Mfr. Part # MDCG-4-12-38 Mouser Part # 934-MDCG-412-38	Littelfuse	Magnetic / Reed Switches MDCG-4 12-38 Learn More about Littelfuse Hamlin MDCG 4	Datasheet	69In Stock	$1.350 $1.153 $951 $882 View $833 $772	Min.: 1 Mult.: 1	Sub-Miniature	SPST	12 AT to 38 AT	140 VAC	Clear	PCB Mount	Axial	Bulk
Magnetic / Reed Switches MDCG-4 17-23 MDCG-4-17-23 Littelfuse 1: $1.263 1.138In Stock	Mfr. Part # MDCG-4-17-23 Mouser Part # 934-MDCG-417-23	Littelfuse	Magnetic / Reed Switches MDCG-4 17-23 Learn More about Littelfuse Hamlin MDCG 4	Datasheet	1.138In Stock	$1.263 $1.109 $1.025 $919 View $855 $850 $832 $772	Min.: 1 Mult.: 1	Sub-Miniature	SPST	17 AT to 23 AT	140 VAC	Clear	PCB Mount	Axial	Bulk
Magnetic / Reed Switches MDCG-4 5265 17-28 RDSW MDCG-4-17-28 Littelfuse 1: $1.504 981In Stock	Mfr. Part # MDCG-4-17-28 Mouser Part # 934-MDCG-417-28	Littelfuse	Magnetic / Reed Switches MDCG-4 5265 17-28 RDSW Learn More about Littelfuse Hamlin MDCG 4	Datasheet	981In Stock	$1.504 $1.285 $1.186 $1.055 View $977 $852 $809 $782	Min.: 1 Mult.: 1	Sub-Miniature	SPST	17 AT to 28 AT	140 VAC	Clear	PCB Mount	Axial	Bulk
Magnetic / Reed Switches MDCG-4 22-28 MDCG-4-22-28 Littelfuse 1: $1.350 1.290In Stock 2.000Expected 10/26/2026	Mfr. Part # MDCG-4-22-28 Mouser Part # 934-MDCG-422-28	Littelfuse	Magnetic / Reed Switches MDCG-4 22-28 Learn More about Littelfuse Hamlin MDCG 4	Datasheet	1.290In Stock 2.000Expected 10/26/2026	$1.350 $1.153 $1.067 $951 View $882 $833 $832 $772	Min.: 1 Mult.: 1	Sub-Miniature	SPST	22 AT to 28 AT	140 VAC	Clear	PCB Mount	Axial	Bulk
Magnetic / Reed Switches MDCG-4 22-38 MDCG-4-22-38 Littelfuse 1: $1.493 302In Stock	Mfr. Part # MDCG-4-22-38 Mouser Part # 934-MDCG-422-38	Littelfuse	Magnetic / Reed Switches MDCG-4 22-38 Learn More about Littelfuse Hamlin MDCG 4	Datasheet	302In Stock	$1.493 $1.285 $1.186 $1.055 View $977 $924 $875 $809 $782	Min.: 1 Mult.: 1	Sub-Miniature	SPST	22 AT to 38 AT	140 VAC	Clear	PCB Mount	Axial	Bulk
Magnetic / Reed Switches SWITCH REED MDCG-4-32-38 Littelfuse 1: $1.350 923In Stock	Mfr. Part # MDCG-4-32-38 Mouser Part # 934-MDCG-432-38	Littelfuse	Magnetic / Reed Switches SWITCH REED Learn More about Littelfuse Hamlin MDCG 4	Datasheet	923In Stock	$1.350 $1.153 $1.067 $951 View $882 $833 $788 $772	Min.: 1 Mult.: 1	Sub-Miniature	SPST	32 AT to 38 AT	140 VAC	Clear	PCB Mount	Axial	Bulk
Magnetic / Reed Switches MDCG-4 12-28 MDCG-4-12-28 Littelfuse 1: $1.471 Non-Stocked	Mfr. Part # MDCG-4-12-28 Mouser Part # 934-MDCG-412-28	Littelfuse	Magnetic / Reed Switches MDCG-4 12-28 Learn More about Littelfuse Hamlin MDCG 4	Datasheet	Non-Stocked	$1.471 $1.329 $1.219 $1.120 View $1.054 $1.010 $965 $831	Min.: 1 Mult.: 1	Sub-Miniature	SPST	12 AT to 28 AT	140 VAC	Clear	PCB Mount	Axial	Bulk
Magnetic / Reed Switches MDCG-4 17-38 MDCG-4-17-38 Littelfuse 1: $1.471 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # MDCG-4-17-38 Mouser Part # 934-MDCG-417-38	Littelfuse	Magnetic / Reed Switches MDCG-4 17-38 Learn More about Littelfuse Hamlin MDCG 4	Datasheet	Non-Stocked Lead-Time 17 Weeks	$1.471 $1.329 $1.219 $1.120 View $1.054 $1.010 $876 $872	Min.: 1 Mult.: 1	Sub-Miniature	SPST	17 AT to 38 AT	140 VAC	Clear	PCB Mount	Axial	Bulk
Magnetic / Reed Switches MDCG-4 22-33 MDCG-4-22-33 Littelfuse 1: $1.471 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # MDCG-4-22-33 Mouser Part # 934-MDCG-422-33	Littelfuse	Magnetic / Reed Switches MDCG-4 22-33 Learn More about Littelfuse Hamlin MDCG 4	Datasheet	Non-Stocked Lead-Time 17 Weeks	$1.471 $1.329 $1.219 $1.120 View $1.054 $1.010 $876 $872	Min.: 1 Mult.: 1	Sub-Miniature	SPST	22 AT to 33 AT	140 VAC	Clear	PCB Mount	Axial	Bulk
Magnetic / Reed Switches MDCG-4 27-38 MDCG-4-27-38 Littelfuse 1: $1.471 Non-Stocked Lead-Time 16 Weeks	Mfr. Part # MDCG-4-27-38 Mouser Part # 934-MDCG-427-38	Littelfuse	Magnetic / Reed Switches MDCG-4 27-38 Learn More about Littelfuse Hamlin MDCG 4	Datasheet	Non-Stocked Lead-Time 16 Weeks	$1.471 $1.329 $1.219 $1.120 View $1.054 $1.010 $876 $872	Min.: 1 Mult.: 1	Sub-Miniature	SPST	27 AT to 38 AT	140 VAC	Clear	PCB Mount	Axial	Bulk

MDCG-4 Reed Switches

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