MLRR-4-27-33 - MLRR-4 Series

Series: MLRR-4
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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 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 17-38 AT. High insulation resistance of 1010 ohms minimum and contact resistance of less than 100 milliohms. Available in surface mount version (MLSM-4). Ideally suited for reed relays, security, metering, limit sensing, telecom and office equipment applications. Will handle lamp loads up to 2W @ 14V with no suppression circuitry.

Features:

  • Low close/open hysteresis (close differential)
  • Normally open switch capable of switching 200Vdc or 1.0A at up to 20 Watts
  • Available sensitivity range of 17-38 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:

  • Reed relays
  • Security
  • Limit switching
  • Industrial controls
  • Telecom
  • Office equipment
  • Lamp loads
Check Stock Order Samples
Property (Mouseover for details) Value
Switching Power (W) 20
Switching Voltage (V DC) 200
Switching Current (A DC) 1
Breakdown Voltage (V DC) 250
Max Contact Resistance (Ω) 0.1
Magnetic Sensitivity (AT) 27 to 33
Body Length (mm) 15.24
Overall Length (mm) 40.38
Switch Type A:SPST-NO
Switching Voltage (V AC) 140
Switching Current (A AC) 0.7
Max Operate Time (ms) 0.6
Max Release Time (ms) 0.2
Resonant Frequency (kHz) 6.25
Partner ECAD Models MLRR-4-27-33
Operating Temperature -40° to 125°C

URicon UR_NWFW2_E471070

CRUicon CUR_NQMJ8_E471070

pdficon Reed Switch Selection Guide

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pdficon Littelfuse Reed Switches MLRR-4 datasheet

pdficon Soldering Temperatures Application Note

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pdficon Extreme Temperature Reed Switch Operation Application Note

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pdficon Catalog Glossary Reed Switch Terms Application Note

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pdficon Ampere turn versus mT and Gauss Application Note

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pdficon 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.
pdficon Handling of Reed Sensors Relays And Switches Application Note

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pdficon 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.
pdficon Modifying Reed Switches Application Note

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pdficon 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.)
pdficon 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).
pdficon 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.
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Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
MLRR-4-27-33 MLRR-4 27-33 RoHS No 02/01/2016 PbFree No 02/01/2016 CoC_RoHS10_MLRR-4-27-33 REACH205_Declaration_MLRR-4-27-33 Yes
02/01/2016		 Does not Contain
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