Name: MRPR-3 Series - 19.7mm High Power Reed Switch
Brand: Littelfuse Inc.

MRPR-3 Series - 19.7mm High Power Reed Switch

Series: MRPR-3

Obsolete: 2016 -04-27 Replaced By: MRPR-20 series

Questions? Contact Littelfuse Support

Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

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 3A and switch 1.5A. Available sensitivity range of 22-43 AT. High insulation resistance of 10¹⁰ ohms minimum and contact resistance of less than 100 milliohms. Ideally suited for limit sensing, telecom and office equipment. Will handle light inductive loads with no suppression circuitry.

Features:

Normally open switch capable of switching 200Vdc or 1.5A at up to 50 Watts
Available sensitivity range of 22-43 AT

Benefits:

Hermetically sealed switch contacts are not affected by and have no effect on their external environment
Zero operating power required for contact closure

Applications:

Limit switching
Telecom
Office equipment
Light inductive loads

Access specifications, certifications, check availability and order parts below

Catalog #	Switching Power (W)	Switching Voltage (V DC)	Switching Current (A DC)	Breakdown Voltage (V DC)	Max Contact Resistance (Ω)	Magnetic Sensitivity (AT)	Body Length (mm)	Overall Length (mm)	Switch Type	Operating Temperature

MRPR-3-22-28 Obsolete: 2018 -01-04 Replaced By: MRPR-20-22-28	50	200	1.5	300	0.1	22 to 28	19.69	56.64	A:SPST-NO	-40° to 125°C
MRPR-3-22-33 Obsolete: 2018 -01-04 Replaced By: MRPR-20-22-33	50	200	1.5	300	0.1	22 to 33	19.69	56.64	A:SPST-NO	-40° to 125°C
MRPR-3-27-33 Obsolete: 2018 -01-04 Replaced By: MRPR-20-27-33	50	200	1.5	300	0.1	27 to 33	19.69	56.64	A:SPST-NO	-40° to 125°C
MRPR-3-27-38 Obsolete: 2016 -08-31 Replaced By: MRPR-20-27-38	50	200	1.5	300	0.1	27 to 38	19.69	56.64	A:SPST-NO	-40° to 125°C
MRPR-3-32-38 Obsolete: 2018 -01-04 Replaced By: MRPR-20-32-38	50	200	1.5	300	0.1	32 to 38	19.69	56.64	A:SPST-NO	-40° to 125°C
MRPR-3-32-43 Obsolete: 2018 -01-04 Replaced By: MRPR-20-32-43	50	200	1.5	300	0.1	32 to 43	19.69	56.64	A:SPST-NO	-40° to 125°C
MRPR-3-37-43 Obsolete: 2018 -01-04 Replaced By: MRPR-20-37-43	50	200	1.5	300	0.1	37 to 43	19.69	56.64	A:SPST-NO	-40° to 125°C

Catalog #	Certificates

MRPR-3-22-28
MRPR-3-22-33
MRPR-3-27-33
MRPR-3-27-38
MRPR-3-32-38
MRPR-3-32-43
MRPR-3-37-43

	Reed Switch Selection Guide A quick reference guide to selecting reed switches for electronic applications
	Position and Level Sensing in Washing Machines A most integral appliance in any home is a washing machine. Washing machines have helped made the chore of cleaning clothes quite effortless.
	Littelfuse Reed Switches MRPR-3 datasheet
	Soldering Temperatures Application Note This application note applies to all of Littelfuse?s products that are normally soldered to printed circuit boards (PCBs) including all reed switches.
	Extreme Temperature Reed Switch Operation Application Note Littelfuse reed switches are normally specified to operate in a temperature range of -40 ?C to +125 ?C. T
	Reed Switch and Reed Sensor Activation Application Note Although a reed switch can be activated by placing it inside an electrical coil many reed switches and reed sensors are used for proximity sensing and are activated by a magnet.
	Inductive Load Arc Suppression Application Note When a reed switch or reed sensor is used to control an inductive device (relay coil solenoid transformer small motor etc.)
	Catalog Glossary Reed Switch Terms Application Note Reed Switch Terms Glossary
	Ampere turn versus mT and Gauss Application Note What is the relationship between AT (Ampere*turn) and Tesla or Gauss? What magnet strength will activate a 15 AT reed switch at 5 mm?
	Vibration Testing and Precautions Application Note Littelfuse tests sinusoidal vibration according to Mil. Std. 202G Method 204D Test Condition G (10 ? 2000 Hz frequency sweep at 30 G or 0.06 inch double amplitude whichever is less).
	Capacitive Loads Application Note When there is significant capacitance in a reed sensor reed relay or reed switch circuit the peak current and energy switched by the reed contacts should be considered.
	Reed Switch Extended Shock Capabilities Application Note The maximum shock specifications in the Littelfuse catalog are very conservative for most switches smaller than the DRxxxx type. T
	Rice Cooker Lid Lock Application Note The position sensing lid lock ensures that the lid is securely locked in place.
	Storage of Littelfuse Sensor Parts Application Note The data sheets for Littelfuse parts show temperature ranges for storage. However long term exposure to extreme temperatures in the specified storage temperature range may degrade solderability of terminals.
	Handling of Reed Sensors Relays And Switches Application Note When used within their capabilities Littelfuse reed sensors reed relays and reed switches provide many years of robust performance
	Measuring Reed Switch Sensitivity and Contact Resistance Application Note The purpose of this application note is to document the preferred method of reading the sensitivity and contact resistance of Littelfuse reed switches.
	Flow Sensing in Tankless Water Heaters Application Note Reed switches and sensors are highly effective solutions for flow sensing applications that can be used for detecting the presence of fluid flow in a system or even measure the rate of fluid flow.
	Modifying Reed Switches Application Note When cutting and forming reed switch leads it is important to use the correct support and cutting tools to avoid causing damage to the glass-to-metal hermetic seals.

Part #	Part Description	RoHS	Pb-free	RoHS (2015/ 863/EU) Certificate	REACH (SVHC’s) Declaration	Halogen Free	REACH (SVHC’s)	IPC-Material Declaration
MRPR-3-22-28	MRPR-3 5273 22-28	No 04/21/2016	No 04/21/2016			Yes 04/21/2016		Part Number - MRPR-3-22-28 IPC-Material Declaration Select All X
MRPR-3-32-38	MRPR-3 5273 32-38	No 04/21/2016	No 04/21/2016			Yes 04/21/2016		Part Number - MRPR-3-32-38 IPC-Material Declaration Select All X

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Semiconductors

MRPR-3 Series - 19.7mm High Power Reed Switch

Part Number - MRPR-3-22-28

IPC-Material Declaration

Part Number - MRPR-3-32-38

IPC-Material Declaration

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