HE700 Series - Reed Relay in Dual-In-Line (DIP) Package

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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.

Miniature reed relay in a dual-in-line (DIL) package with a choice of normally open, normally open high-voltage, normally closed or changeover contacts capable of switching up to 300Vdc at 10W. Available with 5V, 12V and 24V coils and diode suppression. Magnetic shield option available. Ideally suited for security, telecom, instrumentation, process control and industrial applications.

Features:

  • Miniature dual-in-line (DIL) package
  • Optional coil suppression diode is available to protect coil drive circuits
  • Available with normally open contacts
  • External magnetic shield option available

Benefits:

  • One relay, various contact choices help to reduce space and cost without compromising flexibility
  • Lower coil power consumption than electromechanical devices
  • Hermetically sealed switching contacts are immune to their environment
  • Transfer molded package gives maximum component protection

Applications:

  • Security systems
  • Telecom equipment
  • Process control systems
  • Industrial equipment
  • Instrumentation

Access specifications, certifications, check availability and order parts below

Catalog #Coil VoltageCoil ResistanceSwitching Voltage (V DC)Switching Current (A DC)Switching Power (W)Switch TypeStockSamplesCompare
HE721A0555002000.510A:SPST-NOCheckOrder
HE721A121210002000.510A:SPST-NOCheckOrder
HE721A242421502000.510A:SPST-NOCheckOrder
HE721B0555002000.510B:SPST-NCCheckOrder
HE721B12125002000.510B:SPST-NCCheck
HE721B242421502000.510B:SPST-NCCheck
HE721C0552001750.255C:SPDT-COCheckOrder
HE721C12125001750.255C:SPDT-COCheckOrder
HE721C242420001750.255C:SPDT-COCheckOrder
HE721E0552001750.255C:SPDT-COCheckOrder
HE721E12125001750.255C:SPDT-COCheck
HE721E242420001750.255C:SPDT-COCheckOrder
HE721R0552001750.255C:SPDT-COCheckOrder
HE721R12125001750.255C:SPDT-COCheckOrder
HE721R242420001750.255C:SPDT-COCheckOrder
HE722A0552002000.510A:DPST-NOCheckOrder
HE722A12125002000.510A:DPST-NOCheckOrder
HE722A242421502000.510A:DPST-NOCheckOrder
HE751A0555003000.510A:SPST-NOCheckOrder
HE751A121210003000.510A:SPST-NOCheckOrder
HE751A242421503000.510A:SPST-NOCheckOrder

pdf icon Sensors Products Catalog

This guide provides an introduction to magnetic sensing and options for value-added custom design packages.

pdf icon 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.

pdf icon Catalog Glossary Reed Switch Terms Application Note

Reed Switch Terms Glossary

pdf icon 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

pdf icon 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.)

pdf icon 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.

pdf icon 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

pdf icon 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).

pdf icon Littelfuse Electronics Reed Relays RoHS Compliance

RoHS: Restriction of Hazardous Substances. This European directive states that no component can contain concentrations of the following materials greater than shown