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KT Series Reed Relay
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Description

The KT series high voltage reed relay and high insulation reed relay is available in both a surface mount (SMD) or through-hole (THT) design. This high voltage reed relay is capable of switching up to 1kVDC, breakdown voltage of 4.5kVDC, isolation voltage to 7kVDC and features a high insulation resistance (IR) >10^13 Ω. This KT series is supplied in a rugged thermoset overmolded package. Tested in accordance with AEC-Q200, UL listed.

UL Certificate of Compliance

Specifications

Coil Voltage (VDC)5, 12, 24
Coil Resistance (Ω)65-1800
Contact Form1A (SPST) Normally Open (N.O.)
Rated Power Max.100W/1000VDC/1A

Applications

Automated test equipment (ATE), battery powered devices, general purpose electronic test equipment, medical equipment, photovoltaics, portable defibrillators, replacement of mercury wetted relays, telecommunications

Series Data Sheet (PDF)
 
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Stock Check

Item No.DatasheetDistributorRegionQuantityCartRFQInventory Date
KT24-1A-40L-THT MASTER/ONLINEAmericas2,970 BUY RFQ2025-04-22
KT12-1A-40L-THT MASTER/ONLINEAmericas105 BUY RFQ2025-04-22
KT24-1A-40L-SMD MASTER/ONLINEAmericas1,000 BUY RFQ2025-04-22
KT12-1A-40L-SMD MASTER/ONLINEAmericas624 BUY RFQ2025-04-22
KT05-1A-40L-SMD MASTER/ONLINEAmericas395 BUY RFQ2025-04-22
KT05-1A-40L-THT MASTER/ONLINEAmericas105 BUY RFQ2025-04-22
KT24-1A-40L-SMD Reed-Rex LLCAmericas0 RFQ2024-09-04
KT24-1A-40L-SMD Electro Sonic GroupAmericas0 RFQ2025-04-22
KT24-1A-40L-THT Electro Sonic GroupAmericas510 BUY RFQ2025-04-22
KT12-1A-40L-THT Electro Sonic GroupAmericas105 BUY RFQ2025-04-22
KT05-1A-40L-SMD Electro Sonic GroupAmericas645 BUY RFQ2025-04-22
KT05-1A-40L-THT Electro Sonic GroupAmericas0 RFQ2025-04-22
KT12-1A-40L-SMD Electro Sonic GroupAmericas874 BUY RFQ2025-04-22
KT05-1A-40L-SMD Heilind ElectronicsAmericas0 RFQ2025-01-10
KT05-1A-40L-THT Heilind ElectronicsAmericas0 RFQ2025-01-10
KT05-1A-BV51370Heilind ElectronicsAmericas0 RFQ2025-01-10
KT12-1A-40L-SMD Heilind ElectronicsAmericas0 RFQ2025-01-10
KT12-1A-40L-THT Heilind ElectronicsAmericas0 RFQ2025-01-10
KT24-1A-40L-SMD Heilind ElectronicsAmericas0 RFQ2025-01-10
KT05-1A-40L-THT MASTER/ONLINEAmericas105 BUY RFQ2025-04-22
KT05-1A-40L-SMD MASTER/ONLINEAmericas395 BUY RFQ2025-04-22
KT12-1A-40L-THT MASTER/ONLINEAmericas105 BUY RFQ2025-04-22
KT12-1A-40L-SMD MASTER/ONLINEAmericas624 BUY RFQ2025-04-22
KT24-1A-40L-SMD MASTER/ONLINEAmericas1,000 BUY RFQ2025-04-22
KT24-1A-40L-THT MASTER/ONLINEAmericas2,970 BUY RFQ2025-04-22
KT05-1A-40L-SMD Digi-Key ElectronicsAmericas3,044 BUY RFQ2025-04-22
KT05-1A-40L-THT Digi-Key ElectronicsAmericas1,979 BUY RFQ2025-04-22
KT12-1A-40L-SMD Digi-Key ElectronicsAmericas398 BUY RFQ2025-04-22
KT12-1A-40L-THT Digi-Key ElectronicsAmericas3,614 BUY RFQ2025-04-22
KT24-1A-40L-SMD Digi-Key ElectronicsAmericas2,133 BUY RFQ2025-04-22
KT24-1A-40L-THT Digi-Key ElectronicsAmericas1,474 BUY RFQ2025-04-22
KT CSLNM1.13-MXMZ-35-0Mouser ElectronicsAmericas1,022 BUY RFQ2025-04-22
KT CULPM1.13-NRNU-34Mouser ElectronicsAmericas1,201 BUY RFQ2025-04-22
KT DDLM31.13-6H7J-36-W4A4Mouser ElectronicsAmericas13,474 BUY RFQ2025-04-22
KT DELQS1.12-RGSH-36-N626Mouser ElectronicsAmericas0 RFQ2025-04-22
KT CULPM1.13-NSPP-34Mouser ElectronicsAmericas0 RFQ2025-04-22
KT DELSS1.12-AYBZ-36-N626Mouser ElectronicsAmericas8,896 BUY RFQ2025-04-22
KT DDLM32.13-HRJS-35-K1M1-100-R18Mouser ElectronicsAmericas7,667 BUY RFQ2025-04-22
KT CSLNM1.13-MXMZ-34-0Mouser ElectronicsAmericas1,452 BUY RFQ2025-04-22
KT DDLM32.13-HQJQ-35-K1M1-100-R18Mouser ElectronicsAmericas0 RFQ2025-04-22
KT DELQS1.12-THVH-36-S446Mouser ElectronicsAmericas0 RFQ2025-04-22
KT DMLN31.13-8F5H-36-L6E2Mouser ElectronicsAmericas2,751 BUY RFQ2025-04-22
KT DELQS1.12-UHVH-36-S4A6Mouser ElectronicsAmericas0 RFQ2025-04-22
KT DELQS1.12-TIVH-36-S446Mouser ElectronicsAmericas14,570 BUY RFQ2025-04-22
KT EELP41.12-S2U1-25-2X4X-5-R18Mouser ElectronicsAmericas24,609 BUY RFQ2025-04-22
KT DELQS1.12RGSH36N6Mouser ElectronicsAmericas0 RFQ2025-04-22
KT DELQS1.12-TIVH36SMouser ElectronicsAmericas0 RFQ2025-04-22
KT DMLN31.13-8F5H-36Mouser ElectronicsAmericas0 RFQ2025-04-22
KT DELSS1.12AYBZ36N6Mouser ElectronicsAmericas0 RFQ2025-04-22
KT CSLNM1.13MXMZ3501Mouser ElectronicsAmericas0 RFQ2025-04-22
KT DDLM31.13-6H7J-36Mouser ElectronicsAmericas0 RFQ2025-04-22
KT CULPM1.13-NQNU-34Mouser ElectronicsAmericas1,844 BUY RFQ2025-04-22
KT05-1A-40L-THT Arrow ElectronicsAmericas50 BUY RFQ2025-04-22
KT Standex FactoryAmericas0 RFQ2025-04-22

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Coil VoltageSwitches & Contact FormContact ConfigurationSwitching LoadSwitching VoltageMounting TypeOptionSpecial Feature
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Part Number Coil VoltageSwitches & Contact FormContact ConfigurationSwitching LoadSwitching VoltageMountingOptionSpecial Feature
KT03-1A-40L-SMD31ASPST-NO< 100 W< 1000 VDCThrough Hole (THT)StandardHigh Voltage Isolation
KT05-1A-40L-SMD51ASPST-NO< 100 W< 1000 VDCThrough Hole (THT)StandardHigh Voltage Isolation
KT05-1A-40L-THT51ASPST-NO< 100 W< 1000 VDCThrough Hole (THT)StandardHigh Voltage Isolation
KT12-1A-40L-SMD121ASPST-NO< 100 W< 1000 VDCThrough Hole (THT)StandardHigh Voltage Isolation
KT12-1A-40L-THT121ASPST-NO< 100 W< 1000 VDCThrough Hole (THT)StandardHigh Voltage Isolation
KT24-1A-40L-SMD241ASPST-NO< 100 W< 1000 VDCThrough Hole (THT)StandardHigh Voltage Isolation
KT24-1A-40L-THT241ASPST-NO< 100 W< 1000 VDCThrough Hole (THT)StandardHigh Voltage Isolation

Associated Parts

LI Reed Relay

LI Series Reed Relay

The LI series is a high voltage reed relay and high insulation reed relay that is epoxy encapsulated. This high voltage reed relay features a high insulation resistance (IR) >10^13 Ω and is capable of switching up to 1kVDC, breakdown voltage of 4.5kVDC, isolation voltage to 7kVDC. UL approval.

Learn More »

SHV Series Reed Relay

The SHV reed relay is a single in-line and high voltage relay or instrumentation grade reed relay supplied in a molded housing, capable of switching up to 1kVDC and breakdown voltage of 4kVDC. This high voltage reed relay series features an insulation resistance >5 x 10^11 Ω and utilizes minimum PCB area, at only 50% compared to our DIP and DIL reed relay series. It is even smaller than the former potted SIL-HV Reed Relay.

UL – Certificate of Compliance

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BE Reed Relay

BE Series Reed Relay

Our most versatile general purpose BE Series Reed Relay with many contact configuration options including up to 5 form A switches. Available in latching or high IR typical 10^13 Ω. Plastic or metal housing, epoxy encapsulated.

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H Series Reed Relay

H Series Reed Relay

The H Series high voltage reed relay is capable of switching up to 10kVDC and breakdown voltage of 15kVDC. This high voltage reed relay is designed with a specially packaged coil with a PCB pin out for the coil only. The switch contacts are available for direct wiring (sky wiring). Replacement for mercury wetted relay.

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HE Series Reed Relay

HE Series Reed Relay

The HE Series high voltage reed relay is capable of switching up to 10kVDC and breakdown voltage of 15kVDC. Leakage distance >26mm. This high voltage reed relay is epoxy encapsulated with many PCB pin configurations available. Options include high voltage wires available for direct wiring of the high voltage leads. Replacement for mercury wetted relay.

Learn More »
HM Reed Relay

HM Series Reed Relay

The HM Series high voltage reed relay is capable of switching up to 10kVDC and breakdown voltage of 15kVDC with a leakage distance >32mm. This high voltage reed relay is epoxy encapsulated with many PCB pin configurations available. Options include high voltage wires available for direct wiring of the high voltage leads. Replacement for mercury wetted relay. Latching version also available.

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Technical Papers

Application & Use
Mounting Instructions – MRX Reed RelaysReed Technology DatabookReed Switch Used With A Permanent MagnetReed Relay Vs. Solid-State & Mechanical RelaysThe Reed Switch Used As A Reed Relay
Datasheets
Datasheet – MH Series Reed RelayDatasheet – MT Series Reed RelayDatasheet – M Series Reed RelayDatasheet – C Series Reed RelayDatasheet – U Series Reed RelayDatasheet – MFS Series Reed RelayDatasheet – MF Series Reed RelayDatasheet – MRE Series Reed RelayDatasheet – BH Series Reed RelayDatasheet – Photo MOSFET Relay SMP-42 SeriesDatasheet – MHV Series Reed RelayDatasheet – Photo MOSFET Relay SMP-58 SeriesDatasheet – Photo MOSFET Relay SMP-74 SeriesDatasheet – Photo MOSFET Relay SMP-45 SeriesDatasheet – Photo MOSFET Relay SMP-40 SeriesDatasheet – Photo MOSFET Relay SMP-38 SeriesDatasheet – Photo MOSFET Relay SMP-47 SeriesDatasheet – Photo MOSFET Relay SMP-36 SeriesDatasheet – Photo MOSFET Relay SMP-23 SeriesDatasheet – Photo MOSFET Relay SMP-21 SeriesDatasheet – Photo MOSFET Relay SMP-30 SeriesDatasheet – Photo MOSFET Relay SMP-31 SeriesDatasheet – Photo MOSFET Relay SMP-37 SeriesDatasheet – SHV Series Reed RelayDatasheet – 567 Series OptocouplersDatasheet – 535 Series OptocouplersDatasheet – 530-70 Series OptocouplersDatasheet – 530-03 Series OptocouplersDatasheet – 528 Series OptocouplersDatasheet – 525 Series OptocouplersDatasheet – 522 Series OptocouplersDatasheet – 521 Series OptocouplersDatasheet – MRX Series Reed RelayDatasheet – RM05-8A-S Series Reed RelayDatasheet – RM05-4A Series Reed RelayDatasheet – BT/BTS Series Reed RelayDatasheet – HI Series Reed RelayDatasheet – SIL HV Series Reed RelayDatasheet – LI Series Reed RelayDatasheet – KT Series Reed RelayDatasheet – HM Series Reed RelayDatasheet – HE Series Reed RelayDatasheet – H Series Reed RelayDatasheet – SIL RF Series Reed RelayDatasheet – HF Series Reed RelayDatasheet – CRF Series Reed RelayDatasheet – UMS Series Reed RelayDatasheet – SIL Series Reed RelayDatasheet – MS Series Reed RelayDatasheet – DIP Series Reed RelayDatasheet – DIL Series Reed RelayDatasheet – CRR Series Reed RelayDatasheet – BE Series Reed Relay
Fundamentals
Reed Technology DatabookThe Basic Reed SwitchElectrical Parameters Of A Reed SwitchAmpere Turns (AT) vs. milliTesla (mT)
Handling & Precautions
Mounting Instructions – MRX Reed RelaysReed Technology DatabookMounting Instructions for Optocoupler Series 567Mounting Instructions for Optocoupler Series 525 & 535Mounting Instructions for Optocoupler Series 522Reed Switch Handling PrecautionsReed Relay Handling PrecautionsReed Switch PrecautionsContact Protection
Life Test Data
Reed Technology DatabookReed Switch Life Test DataReed Switch Test Coils
Magnetics
Reed Technology Databook

Brochures & Catalogs

Capabilities
Standex Electronics Company OverviewCapabilities – X-ray MachineCapabilities – Custom MoldingReed Switches & Sensors BrochureCapabilities & Solutions – ATEX Optocoupler Series for Intrinsically Safe Circuits
Product Solutions
U Series High Frequency Reed Relays FlyerHigh Frequency RF and High Density Reed Relays FlyerBH Reed Relays FlyerSensor & Relay Selection GuideStandex Electronics Company OverviewReed Relays & Optocouplers BrochureSolid State Relays FlyerCustom Engineered Reed Relays InfographicReed Switches & Sensors BrochureCapabilities & Solutions – ATEX Optocoupler Series for Intrinsically Safe CircuitsProduct Solutions – Custom Electronics and Fluid Level Sensors – Marine Market ApplicationsProduct Solutions – Automotive Market ApplicationsProduct Solutions – Surgical Image Power SupplyProduct Solutions – Security Market ApplicationsProduct Solutions – Power Meter MarketProduct Solutions – Medical Market ApplicationsProduct Solutions – Magnetic Reed SwitchProduct Solutions – Lighting Market ApplicationsProduct Solutions – Industrial Market ApplicationsProduct Solutions – Custom Inductive Sensor – AutomotiveProduct Solutions – Appliances Market ApplicationsProduct Solutions – Unmanned Systems Market

Applications

Alternative Energy
Smart Home Industry BrochureAlternative Energy: Custom Switching & Sensing SolutionsElectric & Hybrid VehiclesApplication Alley Reed RelaysReed Relays for Insulation MeasurementAlternative Energy – Reed Relays, Sensors, And MagneticsSolar/Photovoltaic Isolation MonitoringE-car Isolation MeasurementPhotovoltaic Systems – Reed Relay
Appliance
Smart Home Industry BrochureSmart Appliance Market ApplicationsSmart Home ApplicationsSmart World Reed Switch & Power Magnetics
Automotive
Application Alley Reed RelaysReed Relays for Insulation MeasurementSmart Transportation Industry ApplicationsSmart Home ApplicationsSmart Automotive Market Applications & Transportation IndustryE-car Isolation MeasurementStandex Capabilities – Test & MeasurementStandex Capabilities – Automotive Transportation ElectronicsCable Testing – Reed Relay
Consumer Electronics
Smart Home Industry BrochureApplication Alley Reed RelaysSmart Industrial ApplicationsSmart Other Market ApplicationsSmart Home ApplicationsSmart Home Security Wireless SensingFast Oscilloscopes – Reed Relay
HVAC
Smart Industrial ApplicationsSmart HVAC and Plumbing Market ApplicationsSmart Home ApplicationsSolar/Photovoltaic Isolation MonitoringSmart World Reed Switch & Power Magnetics
Industrial
Agriculture Industry BrochureConstructionApplication Alley Reed RelaysSmart CitySmart Industrial ApplicationsOptocouplers For Hazardous EnvironmentsElectrometers – Reed Relay
Medical
Medical Guide: Custom Switching & Sensing SolutionsApplication Alley Reed RelaysPortable Defibrillators – Reed RelaysStandex – Medical ApplicationsStandex Capabilities – Test & MeasurementElectrosurgical Generators – Reed RelaysOperating Rooms – Reed Relays
Military & Aerospace
Application Alley Reed RelaysStandex Capabilities – Test & MeasurementAirplane TVS – Reed RelayOptocouplers For Hazardous EnvironmentsPortable Radios – Reed RelayElectrometers – Reed RelayCable Testing – Reed RelayAirline Video & Audio – Reed Relay
Security & Safety
Smart Home Industry BrochureSmart Industrial ApplicationsSmart Security Market ApplicationsSmart Home ApplicationsSmart Home Security Wireless SensingSmart World Reed Switch & Power MagneticsPhotovoltaic Systems – Reed Relay
Telecommunications
Test and Measurement: Specialized Switching SolutionsApplication Alley Reed RelaysSmart Other Market ApplicationsRF Receivers – Reed RelayPortable Radios – Reed Relay
Test & Measurement
Test and Measurement: Specialized Switching SolutionsApplication Alley Reed RelaysInstrumentation Grade Reed RelaysStandex – Reed Relays Switch Low Micro Volts SignalsStandex Capabilities – Test & MeasurementAirplane TVS – Reed RelayRF Attenuators – Reed RelayIC Performance PCB’s – Reed RelayIC Testing – Reed RelayFunctional PCB Testing – Reed RelayNetwork Analyzers – Reed RelayModular Instrumentation – Reed RelayHigh End Multimeters – Reed RelayFast Oscilloscopes – Reed RelayElectrometers – Reed RelayData Acquisition Systems – Reed RelayCable Testing – Reed RelayAutomated Test Equipment – Reed RelayAirline Video & Audio – Reed Relay
Transportation
Agriculture Industry BrochureConstructionElectric & Hybrid VehiclesApplication Alley Reed RelaysReed Relays for Insulation MeasurementSmart Industrial ApplicationsSmart Transportation Industry ApplicationsSmart Home ApplicationsSmart Automotive Market Applications & Transportation IndustryE-car Isolation MeasurementStandex Capabilities – Test & MeasurementAirplane TVS – Reed RelayStandex Capabilities – Automotive Transportation ElectronicsCable Testing – Reed RelayAirline Video & Audio – Reed Relay
Utilities & Smart Grid
Smart Home Industry BrochureAlternative Energy: Custom Switching & Sensing SolutionsReed Relays for Insulation MeasurementSolar/Photovoltaic Isolation MonitoringSmart World Reed Switch & Power Magnetics

Media

Product Training Module – RF Reed Relays Part I  

Product Training Module – RF Reed Relays Part I

Welcome to Standex Electronics' RF Reed Relays Part I training module. Reed relays have long been known to have the capability to switch and carry RF signals and fast digital pulses. Hardly anyone thought reed relays were capable of switching and carrying RF up to 20 GHz, because the reed switch's leads are composed of nickel/iron which has a relatively high permeability or (MU). However, 20GHz is now a reality at Standex Electronics. We will be presenting the reasons Standex Electronics and their design team have made this possible.

Product Training Module – RF Reed Relays Part II  

Product Training Module – RF Reed Relays Part II

Welcome to Standex Electronics' RF Reed Relays Part II training module. This second RF presentation assumes you have already heard the first Standex Electronics RF Part I presentation. Understanding the simple physical layout of a reed relay makes it easy to design and rest reed relays for RF and fast digital pulse applications. RF is dependent on the physical layout or signal path it takes while going through circuits and the components that make up those circuits. We will show you how the physical layout of the reed relay will have a direct bearing on the RF signal's success going into and out of the reed relay. Coupled with the relay's physical layout, the materials making up the reed relay are also important.

Product Training Module – Reed Relay Overview  

Product Training Module – Reed Relay Overview

Welcome to Standex Electronics Reed Relay training module. This module will define key terms used in reed relays and their applications. The module will also describe the structure and function of reed relays and their vast number of applications.

Product Training Module – Magnet Technology & Their Uses  

Product Training Module – Magnet Technology & Their Uses

Welcome to Standex Electronics where we will be exploring what magnets are and how they are used in the electronic industry. We will define the key terms relating to magnets and we will explore what magnets are, what they do, and how they are used.

Product Training Module – Latching Form B Reed Relays & Sensors  

Product Training Module – Latching Form B Reed Relays & Sensors

Welcome to Standex Electronics' Latching and Form B Reed Relay and Sensor training module. This module will define key terms of Form B and Latching sensors and relays. The module will also describe the structure and function of latching and Form B reed relays and sensors.

Training Resources

Photo-MOSFET Solid State Relays OverviewReed Academy AgendaSwitching Low Offset Voltage Reed RelaysRF Reed Relays Part IIRF Reed Relays Part IReed Switch TechnologyReed Relays OverviewPermanent Magnet TechnologyLatching & Form B Reed Relays And SensorsRF Reed Relays Presentation – Part 2 – PTM Online… On Demand®RF Reed Relays Presentation – Part 1 – PTM Online… On Demand®Reed Switch Technology – PTM Online… On Demand®Reed Relay Overview – PTM Online… On Demand®Magnet Technology and Their Uses – PTM Online… On Demand®Latching Form B Reed Relays Overview – PTM Online… On Demand®

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News & Announcements

STANDEX ACQUIRES AMRAN INSTRUMENT TRANSFORMERS AND NARAYAN POWERTECH PVT., LTD.
29 October, 2024 0:00

Standex Electronics Announces the MK33 SMD Reed Switch Series: Optimized to Switch High Power in a Small Footprint
8 May, 2024 0:00

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Time: June 03. - 05. 2025
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Booth No.: D30
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