Standex-Meder Electronics Custom Engineered Solutions For Tomorrow

KSK-1A87 Series Reed Switch


Miniature reed switch featuring long life with a glass length of 10.0mm and diameter of 2.0mm. Rated power 10 W, Switching voltage 200 VDC, Switching current 0.5 Amp DC. UL approval.


Overall Length mm (inches)35.5 (1.397)
Glass Length Max. mm (inches)10.0 (0.394)
Glass Dia. Max. mm (inches)2.00 (0.078)
Lead Dia. mm (inches)0.4 (0.015)
Contact Form1A (SPST) Normally Open (N.O.)
Pull-In Range10-40 AT
Rated Power Max.10W/200VDC/0.5 Amp DC


General purpose, automotive, test and measurement (ATE)

Series Data Sheet (PDF)

Stock Check

Item No.DistributorRegionQuantityCartRFQInventory Date
KSK-1A87-1015Digi-Key ElectronicsUnited States1,161RFQ11/29/2015 4:25:00 PM
KSK-1A87-1015Mouser ElectronicsUnited States425RFQ11/28/2015 3:51:00 AM
KSK-1A87-1020Farnell element14United Kingdom1,908RFQ11/27/2015 9:50:00 AM
KSK-1A87-1020element14Singapore913RFQ11/27/2015 2:12:00 AM
KSK-1A87-1113Relay Specialties, IncUnited States500RFQ11/29/2015 11:11:00 AM
KSK-1A87-1520Digi-Key ElectronicsUnited States585RFQ11/29/2015 4:25:00 PM
KSK-1A87-1520Mouser ElectronicsUnited States985RFQ11/28/2015 3:51:00 AM
KSK-1A87-1520Schukat Electronic Vertriebs GmbHGermany4,010RFQ11/29/2015 12:32:00 AM
KSK-1A87-2025Schukat Electronic Vertriebs GmbHGermany560RFQ11/29/2015 12:32:00 AM
KSK-1A87-2030Mouser ElectronicsUnited States843RFQ11/28/2015 3:51:00 AM

Technical Papers

Brochures & Catalogs



Fluid Level Sensors for Automotive & Transportation

Standex-Meder solved an automotive customer's problem and delivered a custom, fast design and quick turn molded liquid level sensor solution that fit the exacting needs for space and performance, while eliminating any potential for a battery coolant leak.

By integrating a float inside the tank and placing a reed sensor on the outside that can sense through the plastic wall, we were able to provide a fluid level sensor that didn't compromise the coolant tank's pressurized seal.

Fluid level sensors can be found in automotive applications from washer bottle fluid to engine coolant sensor applications. "The reed switch sensor technology works well."

Standex-Meder Electronics is a global leader in the design, development, and manufacturing of standard and custom Reed Sensors and standard sensors.

Reed Switches for Smart Home Automation Systems

Reed Switches work well with smart home automation systems because they draw no power compared to other magnetic sensing elements. They can be married to a wireless or Bluetooth technology and placed in remote battery powered door sensors or window sensors, or anything where you’re looking for movement or proximity. They’re a very cost-effective and robust component suitable for the home environment, requiring fewer connections resulting in longer battery life.

In today’s homes and also commercial properties, there’s an increased necessity for control to improve efficiency and productivity. And with that control, you have different products that measure temperature, water levels, security, and locks, so within those products reed switches play a major role in making them “smart”.

Standex-Meder Electronics is a global leader in the design, development, and manufacturing of standard and custom Reed Switches.

Aerospace Planar Transformer for Switch-Mode Power Supplies

In this Planar Transformer mini case study, we discuss how we partnered with an aerospace customer, delivering a coupled hybrid aerospace solution that integrated a standard planar transformer with an inductor. We solved the customer's challenge of decreasing unit costs while saving design space and improving overall performance with the added benefit of reducing electromagnetic interference (EMI).

A planar transformer, the primary component used in switch-mode power supplies, offers volumetric efficiency and a lower profile over traditional wire-wound transformers because it uses printed circuit boards (PCB) for its turns.

To find out more about how we partner, solve, and deliver solution-based engineering for power magnetics customers, visit our Application Alley at http:://

Standex-Meder Electronics is a global leader in the design, development, and manufacturing of standard and custom planar transformer solutions.

Standex-Meder Electronics | Company Video

Standex-Meder Electronics is a worldwide market leader in the design, development and manufacture of standard and custom electro-magnetic components, including magnetics products and reed switch-based solutions.

In this video we discuss our global manufacturing and supply chain capabilities and how WE MATTER™ by fueling the processes that we often take for granted every day. Through our diverse in-house capabilities and strong engineering designs we PARTNER with our customers to SOLVE their unique challenges, and DELIVER custom high-performing solutions...

Standex-Meder Electronics | Values

Standex-Meder Electronics new company video shares our global manufacturing and supply chain capabilities, and how “we matter” through our partner, solve, and deliver approach.

Standex-Meder Electronics dynamic engineering and diverse product line of custom and standard components deliver reliable high-quality solutions to customers across broad markets and applications. Our robust product offerings include Reed Switches, Relays, and Sensors, Planar Transformers and Inductors, and Fluid Level Sensors that provide solutions for the Automotive, HVAC, Alternative Energy, Lighting/LED, Appliance, Mil-Aero, Medical, and many others...

How a Reed Switch Works

The Reed Switch is the core element in Reed Sensors, Level Sensors and Reed Relays. A magnetic contact switch consisting of two ferromagnetic blades are hermetically sealed inside a glass tube. The glass tube is filled with a high purity inert gas. Under non operating conditions the reed switch contacts do not touch. Standex-Meder Electronics is leading the way in reed switch manufacturing...

How Reed Switches are Manufactured

Ultra miniature and high precision Reed Switch manufacturing in the most modern factory of its kind. Standex-Meder Electronics micro technology enables the mass production of Reed Switches at the highest quality for competitive pricing. The complete process from the sputtering of the magnetic contacts through the hermetic sealing and final testing...

Reed Switch Technology

Standex-Meder Electronics expert discusses reed switch technology and why reed switches play such an important role in many applications.

3D Magnetic Mapping for Sensor Applications

Standex-Meder's technical expert describes their 3D Magnetic Mapping capabilities used in reed sensor applications

Reed Switch SMD Sensor & Magnet Actuation in 3-D

A Reed Switch Sensor on a surface mount PCB assembly shown in 3-D with actuating magnet. When viewed in three dimensions, the magnetic flux lines emanating from the magnet look like a beer barrel keg; and also in three dimensions, with the magnet parallel to the reed switch, the center magnetic lobe array looks like a donut and the two outside lobes look more like a boxer's punching bag -- the kind hung from the ceiling. Essentially the fields from the magnet and the fields for the lobes are symmetrical when viewed in three dimensions. As seen in two dimensions, when the magnet is brought into one of the lobes the reed switch contacts will close. Now, as seen in three dimensions the magnet can be brought into the lobes in any spherical direction for contact closure to occur. Here the magnet is moved into the sphere of influence of the lobes of the reed switch showing the closure and opening when the magnet enters the lobes and passes through them, The change in lighting signifies the closing and opening of the reed switch contacts.

Standex-Meder Electronics at AHR Expo 2013

Alex Vinnage talks about what attendees can expect from Standex-Meder at the 2013 AHR Expo.

Como se Fabrica un Ampolla Reed (ES)

Construir los interruptores de lengüeta no es ningún trabajo fácil. Ser la fábrica más moderna de su clase en Europa, nuestra producción en Turingia es un mundo de ellos mismos. El tamaño de estos componentes de alta precisión es extremadamente reducido, la capa ultrafina y el trabajo meticuloso se requieren en cada paso de la producción. Esta microtecnología permite la producción en masa de los productos de alta calidad a precios competitivos.

Linea de Productos Standex-Meder (ES)

Los Interruptores de Lengüeta, Relés de Lengüeta y Sensores de Lengüeta son nuestros productos más importantes. Estos tres grupos tienen una cosa en común: el Interruptor de Lengüeta es el elemento núcleo de todos ellos. Los Interruptores de Lengüeta so dispositivos operados magnéticamente, que han sido inventados por Laboratorios Bell a principios de los años 1940' en Estados Unidos. Funcionan con un principio simple:Dos hojas ferromagnéticas traslapadas de hierro se sellan en un tubo de cristal, separados por una distancia de solamente unos pocos micrones...

Comment fonctionnent les Ampoules Reed (FR)

Les ampoules Reed, les relais Reed et les capteurs Reed sont nos produits les plus importants. Ces trois groupes ont une chose en commun: l'ampoule Reed, « au cœur » de tous ces produits.. Les ampoules Reed sont des appareils activés magnétiquement, qui furent inventés par Bell Labs aux Etats-Unis dans les années 1940. Ils fonctionnent selon un principe simple: Deux lames ferromagnétiques qui se chevauchent , sont scellées dans un tube de verre, séparées par une distance de quelques microns seulement...

Comment sont fabriquées les Ampoules Reed? (FR)

Fabriquer des ampoules Reed n'est pas un travail facile. Etant l'usine la plus moderne dans son genre en Europe, notre production de Thuringe est « dans un autre monde » . La taille de ces composants à haute précision est extrêmement petite, l'enduit ultra-mince, un travail méticuleux est exigé dans chaque étape de production. Cette micro technologie permet la production en série de produits de qualité aux prix concurrentiels...

Benvenuti in MEDER (IT)

Molto spesso sono le cose più piccole ad avere l'impatto maggiore nella nostra vita. A volte non le percepiamo neanche, anche se rendono la nostra vita più confortevole e sicura. Sono utilizzate in veicoli, ingegneria della sicurezza, elettrodomestici, dispositivi medici, telecomunicazione e sistemi industriali di ogni tipo. Precisi, affidabili e di lunga durata. Questi interruttori reed, sensori e relè miniaturizzati lavorano instancabilmente secondo la legge di Reed. Anche se a prima vista sembrano semplici, sono in realtà delle vere e proprie meraviglie dell'ingegneria che solo poche aziende al mondo sono in grado di produrre. E noi siamo una di esse: MEDER electronic. Prodotti innovativi per il futuro...

Gamma di prodotti Standex-Meder (IT)

Interruttori reed, relè reed e sensori reed sono i nostri prodotti più importanti. Queste tre categorie di prodotti hanno una cosa in comune: l'ampolla reed, che è il loro elemento centrale. Le Ampolle reed sono dispositivi azionati magneticamente, che furono inventati nei primi anni '40 negli Stati Uniti, nei laboratori Bell. Funzionano secondo un principio molto semplice: due lame di materiale ferromagnetico sono ermeticamente sigillate all'interno di un tubo di vetro...


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Tradeshows & Events

AHR Expo (International Air-Conditioning | Heating | Refrigerating Exposition)
Time: January 25-27, 2016
Place: Orange County Convention Center, Orlando, Florida USA
Booth No.: 2497
For More Details, Click Here.

APEC 2016 (Applied Power Electronics Conference & Exposition)
Time: March 20-24, 2016
Place: Long Beach Convention Center, Long Beach, California USA
Booth No.: 1763
For More Details, Click Here.

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