cad

SF Relays
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Catalog excerpts

SF Relays - 1

Flat type safety relays FEATURES 1. Forced operation contacts N.O. and N.C. side contacts are connected through a card so that one interacts with the other in movement. In case of a contact welding, the other keeps a min. 0.5mm .020inch contact gap. 2. Separated chamber structure N.O. and N.C. side contacts are put in each own space surrounded with a card and a body-separater. That prevents short circuit between contacts, which is caused by their springs welding or damaged. 3. Contact arrangement of 3 Form A 1 Form B Enables various forms of control circuit. 4. High breakdown voltage High breakdown voltage 2,500 Vrms (between contact sets/ between contact and coil) RoHS compliant 5. High sensitivity Realizes thin shape and high sensitivity (500mW nominal operating power) by utilizing high-efciency polarized magnetic circuit with 4-gap balanced armature. 6. Complies with safety standards Standard products are UL, CSA, TÜV and SEV certied. Conform to European standards. TÜV certied. Complies with SUVA European standard. TYPICAL APPLICATIONS 1. Industrial equipment such as presses and machine tools 2. Elevators and other kinds of hoisting mechanisms, conveyor equipment. ORDERING INFORMATION SF 3 Contact arrangement 3: 3 Form A 1 Form B Nominal coil voltage DC 5, 12, 24, 48, 60V TYPES Contact arrangement Nominal coil voltage 5V DC 12V DC 24V DC 48V DC 60V DC Standard packing: Carton: 20 pcs.; Case: 200 pcs. RATING 1. Coil data Contact arrangement Nominal coil voltage 80%V or less of nominal voltage (Initial) Nominal coil current [±10%] (at 20°C 68°F) 10%V or more of nominal voltage (Initial) Nominal operating power (at 20°C 68°F)

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SF Relays - 2

SF 2. Specications Characteristics Contact Item Arrangement Contact resistance (Initial) Contact material Nominal switching capacity (resistive load) Max. switching power (resistive load) Max. switching voltage Max. switching current Nominal operating power Min. switching capacity (Reference value)*1 Insulation resistance (Initial) Breakdown voltage (Initial) Electrical characteristics Specications 3 Form A 1 Form B Max. 30 mΩ (By voltage drop 6 V DC 1A) Au-ashed AgSnO2 type 6A 250V AC, 6A 30V DC 1,500VA 180W 250V AC, 30V DC 6A 500mW 100mA 5V DC Min. 1,000MΩ (at 500V DC) Measurement at same...

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SF Relays - 3

SF SAFETY STRUCTURE OF SF RELAYS scenario, relay breakdown (coil rupture, faulty operation, faulty return, and fatigue and breakage of the operating spring and return spring), and even in the event of end of life. (unforeseen externally caused circuit or device breakdowns, end of life incidents, and noise, surge, and environmental inuences) owing to contact welding, spring fusion or, in the worst-case This SF relay design ensures that subsequent operations shut down and can automatically return to a safe state when the SF relay suffers overloading and other circuit abnormalities Even when...

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SF Relays - 4

SF Contact Operation Table The table below shows the state of the other contacts when the current through the welded form “a” contact is 0 V and the rated voltage is applied through the form “b” contact. State of other contacts 2 3 4 >0.5 >0.5 >0.5 >0.5 >0.5 >0.5 1 >0.5: contact gap is kept at min. 0.5 mm .020 inch Empty cells: either closed or open * Contact gaps are shown at the initial state. If the contacts change state owing to loading/breaking it is necessary to check the actual loading. NOTES 1. For cautions for use, please read “General Application Guidelines”.

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