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

Series: HE700
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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. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

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 and 140Vac at 10VA. 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

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Access specifications, certifications, check availability and order parts below

Catalog #Coil VoltageCoil ResistanceSwitching Voltage (V DC)Switching Current (A DC)Switching Power (W)Switch TypePartner ECAD ModelsStockSamplesCompare
HE721A0555002000.510A:SPST-NOHE721A05CheckOrder
HE721A121210002000.510A:SPST-NOHE721A12CheckOrder
HE721A242421502000.510A:SPST-NOHE721A24CheckOrder
HE721B0555002000.510B:SPST-NCHE721B05CheckOrder
HE721B12125002000.510B:SPST-NCHE721B12Check
HE721B242421502000.510B:SPST-NCHE721B24Check
HE721C0552001750.255C:SPDT-COHE721C05CheckOrder
HE721C12125001750.255C:SPDT-COHE721C12CheckOrder
HE721C242420001750.255C:SPST-COHE721C24CheckOrder
HE721E0552001750.255C:SPDT-COHE721E05CheckOrder
HE721E12125001750.255C:SPDT-COHE721E12Check
HE721E242420001750.255C:SPDT-COHE721E24CheckOrder
HE721R0552001750.255C:SPDT-COHE721R05CheckOrder
HE721R12125001750.255C:SPDT-COHE721R12CheckOrder
HE721R242420001750.255C:SPDT-COHE721R24Check
HE722A0552002000.510A:DPST-NOHE722A05CheckOrder
HE722A12125002000.510A:DPST-NOHE722A12CheckOrder
HE722A242421502000.510A:DPST-NOHE722A24CheckOrder
HE751A0555003000.510A:SPST-NOHE751A05CheckOrder
HE751A121210003000.510A:SPST-NOHE751A12CheckOrder
HE751A242421503000.510A:SPST-NOHE751A24CheckOrder
Catalog # Certificates
Sorting icon
HE721A05 cRUiconURicon
HE721A12 cRUiconURicon
HE721A24 cRUiconURicon
HE721B05 cRUiconURicon
HE721B12 cRUiconURicon
HE721B24 cRUiconURicon
HE721C05 cRUiconURicon
HE721C12 cRUiconURicon
HE721C24 cRUiconURicon
HE721E05 cRUiconURicon
HE721E12 cRUiconURicon
HE721E24 cRUiconURicon
HE721R05 cRUiconURicon
HE721R12 cRUiconURicon
HE721R24 cRUiconURicon
HE722A05 cRUiconURicon
HE722A12 cRUiconURicon
HE722A24 cRUiconURicon
HE751A05 cRUiconURicon
HE751A12 cRUiconURicon
HE751A24 cRUiconURicon

pdficon Littelfuse Reed Relays HE700 datasheet

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 Catalog Glossary Reed Switch Terms Application Note

Reed Switch Terms Glossary
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.
pdficon 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
pdficon 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
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.
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
HE721A0500 HE721A0500 REED RELAY RoHS No 09/10/2017 PbFree No 09/10/2017 CoC_RoHS10_HE721A0500 REACH209_Declaration_HE721A0500 No
09/10/2017		 Does not Contain
HE721A0510 HE721A0510 REED RELAY RoHS No 12/18/2017 PbFree No 12/18/2017 CoC_RoHS9_HE721A0510 REACH219_Declaration_HE721A0510 No
12/18/2017		 Does not Contain
HE721A1200 HE721A1200 REED RELAY RoHS No 01/16/2019 PbFree No 01/16/2019 CoC_RoHS10_HE721A1200 REACH_SVHC Declaration_HE721A1200
Does not Contain
HE721A1210 HE721A1210 REED RELAY RoHS No 02/20/2018 PbFree No 02/20/2018 CoC_RoHS9_HE721A1210 REACH_SVHC Declaration_HE721A1210 No
02/20/2018		 Does not Contain
HE721A2410 HE721A2410 REED RELAY RoHS No 05/27/2018 PbFree No 05/27/2018 CoC_RoHS9_HE721A2410 REACH181_Declaration_HE721A2410 No
05/27/2018		 Does not Contain
HE721A2400 HE721A2400 REED RELAY RoHS No 09/07/2018 PbFree No 09/07/2018 No
09/07/2018
HE721B0510 HE721B0510 RELAY RoHS No 04/19/2018 PbFree No 04/19/2018 CoC_RoHS9_HE721B0510 REACH_SVHC Declaration_HE721B0510 No
04/19/2018		 Does not Contain
HE721C0510 HE721C0510 RELAY RoHS No 09/19/2017 PbFree No 09/19/2017 CoC_RoHS9_HE721C0510 REACH_SVHC Declaration_HE721C0510
Does not Contain
HE721C0530 HE721C0530 REED RELAY RoHS No 05/12/2021 PbFree No 05/12/2021 CoC_RoHS9_HE721C0530 REACH211_Declaration_HE721C0530 No
05/12/2021		 Does not Contain
HE721C0500 HE721C0500 RELAY RoHS No 11/26/2018 PbFree No 11/26/2018 CoC_RoHS10_HE721C0500 REACH_SVHC Declaration_HE721C0500
Does not Contain
HE721C1210 HE721C1210 RELAY RoHS No 03/07/2019 PbFree No 03/07/2019 CoC_RoHS9_HE721C1210
HE721C2400 HE721C2400 REED RELAY RoHS No 09/14/2021 PbFree No 09/16/2021 REACH_SVHC Declaration_HE721C2400 Yes
09/16/2021		 Does not Contain
HE721C2410 HE721C2410 REED RELAY RoHS No 01/08/2020 PbFree No 01/08/2020 CoC_RoHS9_HE721C2410 No
01/08/2020
HE722A0510 HE722A0510 REED RELAY RoHS No 04/19/2018 PbFree No 04/19/2018 CoC_RoHS9_HE722A0510 REACH_SVHC Declaration_HE722A0510 No
04/19/2018		 Does not Contain
HE722A0500 HE722A0500 REED RELAY RoHS No 10/28/2019 PbFree No 10/28/2019 CoC_RoHS10_HE722A0500 REACH_SVHC Declaration_HE722A0500 No
10/28/2019		 Does not Contain
HE722A1210 HE722A1210 REED RELAY RoHS No 03/11/2020 PbFree No 03/11/2020 CoC_RoHS9_HE722A1210 REACH205_Declaration_HE722A1210
Does not Contain
HE722A1200 HE722A1200 REED RELAY RoHS No 04/12/2020 PbFree No 04/12/2020 CoC_RoHS10_HE722A1200 REACH205_Declaration_HE722A1200
Does not Contain
HE722A2410 HE722A2410 RELAY RoHS No 01/08/2020 PbFree No 01/08/2020 CoC_RoHS9_HE722A2410 REACH211_Declaration_HE722A2410 No
01/08/2020		 Does not Contain
HE751A0500 HE751A0500 REED RELAY RoHS No 01/26/2016 PbFree No 01/26/2016 CoC_RoHS10_HE751A0500 REACH201_Declaration_HE751A0500 No
01/26/2016		 Does not Contain
HE751A0510 HE751A0510 RELAY RoHS No 04/25/2016 PbFree No 04/25/2016 CoC_RoHS9_HE751A0510 REACH_SVHC Declaration_HE751A0510 No
04/25/2016		 Does not Contain
HE751A1210 HE751A1210 REED RELAY RoHS No 12/20/2019 PbFree No 12/20/2019 CoC_RoHS9_HE751A1210 REACH211_Declaration_HE751A1210 No
12/20/2019		 Does not Contain
HE751A1200 HE751A1200 RoHS No 10/30/2019 PbFree No 10/30/2019 CoC_RoHS10_HE751A1200 REACH201_Declaration_HE751A1200
Does not Contain
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