Specification	MDSM-4R-12-18

Capacitance	0.2 pF
Circuit	SPST-NO
Current - Carry	1.2 A
Current - Switching	500 mA, 350 mA
Height Above Board	0.112 "
Height Above Board	2.85 mm
Length - Overall [x]	19.3 mm
Length - Overall [x]	0.76 "
Mounting Type	Surface Mount
Operate Range [Max]	18 AT
Operate Range [Min]	12 AT
Operate Time	0.6 ms
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 C
Power - Rated	10 W
Release Time	0.2 ms
Size - Body [diameter]	2.28 mm
Size - Body [diameter]	0.09 "
Size - Body [x]	0.6 "
Size - Body [x]	15.24 mm
Termination Style	Gull Wing
Type	Glass Body Reed
Voltage - Switching AC [custom]	140 V
Voltage - Switching DC	200 V

MDSM-4R-12-18 Series

MDSM-4R 5277 12-18

Part	Mounting Type	Type	Termination Style	Power - Rated	Operating Temperature [Max]	Operating Temperature [Min]	Release Time	Operate Range [Max]	Operate Range [Min]	Length - Overall [x]	Length - Overall [x]	Voltage - Switching AC [custom]	Operate Time	Capacitance	Circuit	Height Above Board	Height Above Board	Size - Body [x]	Size - Body [x]	Size - Body [diameter]	Size - Body [diameter]	Current - Carry	Voltage - Switching DC	Current - Switching
LITTELFUSE MDSM-4R-12-18	Surface Mount	Glass Body Reed	Gull Wing	10 W	125 °C	-40 C	0.2 ms	18 AT	12 AT	19.3 mm	0.76 "	140 V	0.6 ms	0.2 pF	SPST-NO	0.112 "	2.85 mm	0.6 "	15.24 mm	2.28 mm	0.09 "	1.2 A	200 V	350 mA 500 mA

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$	Updated

Digikey	Cut Tape (CT)	1	$ 1.47	<3d
		10	$ 1.24
		25	$ 1.15
		100	$ 1.03
		250	$ 0.95
		500	$ 0.90
		1000	$ 0.85
	Tape & Reel (TR)	3000	$ 0.71	<3d
		6000	$ 0.68
		9000	$ 0.66
		15000	$ 0.66

Description

General part information

MDSM-4R-12-18 Series

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 AT. High insulation resistance of 1010 ohms minimum and contact resistance of less than 100 milliohms. Available in axial-leaded version (MDCG-4). Ideally suited for reed relays, security, metering, limit sensing, telecom and office equipment applications. Available in bulk packaging or tape and reel.