RS PRO SPCO Form A Through Hole Reed Switch, 500mA 170V

RS PRO 1NO, Through Hole Reed Switch 15-20AT, 200V, 0.5 A, Glass, 10 W, 1 Form A Contact

From RS PRO we offer you a selection of high-quality miniature 1 form A change over magnetically operated reed switches. The Reed Switches glass body is hermetically sealed with magnetically operated contacts ensuring no external contamination. The many benefits of the RS PRO Reed switches are, dependable with a long operational life plus will not wear out when switching, and with the switches requiring little power to work are suitable for a range of devices and applications even within the harshest environments.

Reed Switch Dimensions

• Overall length 44.3 mm


• Glass body length 14 mm


• Glass body diameter 2.2 mm

Features & Benefits

• Miniature Reed Switch 1NO


• 1 Form A Changeover


• KMS-01 Test coil


• Pull in 15 AT minimum, 20 AT maximum


• 10 W maximum contact rating


• Through Hole mounted


• 0.5 A Switching current


• 200 V dc Switching voltage


• Operating temperature -40°C to +130°C
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• Iridium contacts

Applications Type

• Position sensing


• Alarm systems


• Door detectors


• Anti-tamper switches, counters


• Automotive, tests and measurement, safety industries and many more

What is a Reed Switch

Basically, a Reed Switch is an electrical switch that works with a magnetic field and consists of two thin, easily magnetised, metal reeds all sealed within a glass tube, usually filled with an inert gas. The reeds are positioned within the sealed tube close together but do not touch. When a magnetic field operates close to the reed switch it then becomes magnetised which causes the reeds to make physical contact which in turn closes an electrical circuit allowing current to flow through the reed switch. When the magnetic field is removed all magnetisation is removed and the reeds lose contact returning to their normal state (not touching, open) which then stops the electrical circuit.

Why RS PRO?

RS PRO is the own brand of RS. The RS PRO Seal of Approval is your assurance of professional quality, a guarantee that every part is rigorously tested, inspected, and audited against demanding standards. Making RS PRO the Smart Choice for our customers.

RS PRO Datasheet