Littelfuse PCB Surface Mount Reed Switch 0.5 A 200 V

RS Stock No.:: 905-8904
Mfr. Part No.:: MDSM-4R-12-18
Brand:: Littelfuse

Littelfuse PCB Surface Mount Reed Switch 0.5 A 200 V

Subtotal (1 bag of 5 units)*

Kr. 61,59

(exc. VAT)

Kr. 76,99

(inc. VAT)

FREE delivery for online orders over 750,00 kr

In Stock

Plus 4 215 unit(s) shipping from 04 May 2026

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Units	Per unit	Per Bag*
5 +	Kr. 12,318	Kr. 61,59

*price indicative

RS Stock No.:: 905-8904
Mfr. Part No.:: MDSM-4R-12-18
Brand:: Littelfuse

Specifications

Technical Reference

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Littelfuse
	Product Type	Surface Mount Reed Switch
	Maximum Switching Current	0.5A
	Maximum Switching Power	10W
	Maximum Switching Voltage	200V
	Contact Resistance	100mΩ
	Contact Material	Nickel Iron Alloy
	Maximum Release Time	0.1ms
	Operating Time Including Bounce	0.5ms
	AT Value Range	12 to 18 AT
	Terminal Type	Wire
	Mount Type	PCB
	Minimum Operating Temperature	-40°C
	Maximum Operating Temperature	105°C
	Series	MD-SM
	Length	15.24mm
	Standards/Approvals	UR

	Select all
	Brand Littelfuse
	Product Type Surface Mount Reed Switch
	Maximum Switching Current 0.5A
	Maximum Switching Power 10W
	Maximum Switching Voltage 200V
	Contact Resistance 100mΩ
	Contact Material Nickel Iron Alloy
	Maximum Release Time 0.1ms
	Operating Time Including Bounce 0.5ms
	AT Value Range 12 to 18 AT
	Terminal Type Wire
	Mount Type PCB
	Minimum Operating Temperature -40°C
	Maximum Operating Temperature 105°C
	Series MD-SM
	Length 15.24mm
	Standards/Approvals UR

9058904 Datasheet

MDSM Surface Mount Reed Switch, Low Power

These surface-mount reed switches can switch 200 V dc at 10 W. They have a low electrical footprint and require zero operating power to close the contacts. These units are hermetically sealed and with magnetically operated contacts they are highly resilient to contamination. Even operating in conditions long after optical and other technology reed switches would have failed. They have Form A (SPST normally open) contacts.

Item 905-8900 has a glass envelope measuring 10.16 x 1.8 mm and has an AT 20-25 sensitivity rating.

Item 905-8904 has a glass envelope measuring 15.24 x 2.28 mm and has an AT 12-18 sensitivity rating.

Potential Applications

Position Sensing

Level sensing

Industrial Controls

Security

Limit Switching

Office Equipment

Metering

Features

Surface mounting normally open switch

Capable of switching 200 V dc or 0.5 A at up to 10 W

Low, stable contact resistance

Operating temperature range: -40°C to +125°C

Littelfuse

Standards

UL, ATEX Class I, Zone 2