MKA Reed Switch MKA-14103

Technical Support:Reed Switch Modification/Packaging/ Expoxy Encapsulation/Wire Bonding MKA Reed Switch MKA-14103    Description

Total Length  44.7 mm  Glass Length  14.2mm  Glass Diameter  2.3 mm  Contact Form  1A ( SPST-NO )  Contact Position  SYM  Contact Material  Ru  Contact Rating  10W  Max. Switching Voltage  100 VDC / VAC  Max. Switching Current  0.5A  Contact Resistance(at initial value)  100 mOhms  Pull In Value (AT)  7-35  Drop Out Value (AT)  5  Operation Time  1.0 mSec.(Max.)  Release Time  0.4 mSec.(Max.)  Breakdown Voltage  220 VDC  Contact Capacitance  0.7 pF  Insulation Resistance  1010 Ohms  Resonant Frequency  4 kHz  Operation Temperature  -60 °C ~+125 °C  High Humidity  98% (Max.)  Operation Frequency  400 Hz  Electrical Life  5×107(50mV,10mA)2×107(5V,10mA) Test Coil  5000 580 Ohm  Leads  Gold-Plated  Safety  UL   

Order informations 

MPQ/MOQ: 1K

                                                   Reed Switch Structure and Principle of Operation

The reed switches comprise two ferromagnetic reeds placed with a gap in between and hermetically sealed in a glass tube. The glass tube is filled with inert gas to prevent the activation of the contacts. The surfaces of the reed contacts are plated with rhodium or iridium.

The reed switch is operated by the magnetic field of an energized coil or a permanent magnet which induces north (N) and south (S) poles on the reeds. The reed contacts are closed by this magnetic attractive force. When the magnetic field is removed, the reed elasticity causes the contacts to open the circuit.

The transfer type reed switch is normally ON, due to mechanical bias of the common (COM) lead, which is between the normally closed (N.C) reed contact and the normally open (N.O) reed contacts.

When an external magnetic field is induced, the N.C blade is not affected because it is non-magnetic but the COM lead is attracted by the N.O lead and moves. When the magnetic field is removed, COM lead again moves to the N.C lead by mechanical.

                                                                

MKA Reed Switch MKA-14103