E2R0024-41-31 ORT551 REED SWITCH REED SWITCH ORT551 Ultraminiature Transfer Type GENERAL DESCRIPTION The ORT551 is a ultraminiature two-contact reed switch designed for transfer type operation. The contacts are sealed within the glass tube with inert gas to maintain contact reliability. Features (1) Reed contacts are hermetically sealed within a glass tube with inert gas and do not receive any influence from the external atmospheric environment. (2) Quick response (3) The structure comprises an operating system and electrical circuits coaxially. Reed switches are suited to applications in radio frequency. (4) Reed switches are compact and light weight. (5) Superior corrosion resistance and wear resistance of the contacts assures stable switching operation and long life. (6) With a permanent magnet installed, reed switches economically and easily become proximity switches. External Dimensions (Unit:mm) f0.5 MAX f2.54 f0.5 N.C N.O f0.5 MAX 14.0 51.6 0.3 56.1 0.3 APPLICATIONS OF REED SWITCHES 1. Automotive electronic devices 2. Control equipment 3. Communication equipment 4. Measurement equipment 5. Household appliances 128REED SWITCH ORT551 ELECTRICAL CHARACTERISTICS Rated Value Parameter Symbol Condition Unit Min. Typ. Max. Pull-in Value PI 10 30 AT Drop-out Value DO 4 AT Contact Resistance mW CR 100 Breakdown Voltage PI>20 200 VDC Breakdown Voltage PI<20 150 VDC 9 Insulation Resistance 10 W Electrostatic Capacitance 1.5 pF Contact Rating 3 VA DC Maximum Switching Voltage 30 V AC Maximum Switching Current 0.2 A Maximum Carry Current 0.5 A (1) Drop-out vs. Pull-in (2) Contact resistance (Measurement length: 30 mm) 99.9 AT 99 N.O 50 N.C 95 40 90 80 70 30 60 50 40 30 20 20 10 5 10 1 0.1 0 10 20 30 40 50 40 60 80 100 mW AT Pull-in Contact resistance 129 Drop-out Cumulative frequency percent