SISF2 Series

SISF2 Series

Product catalog summary
Overview: The document provides technical specifications for the SISF2 Series relays by ELESTA GmbH, highlighting features, dimensions, coil data, insulation data, mechanical data, and contact data.
Features: The SISF2 Series relays are equipped with forcibly guided contacts compliant with IEC 61810-3, suitable for print mounting, and have a height of only 13 mm. The contact assembly for SISF112 includes 1 NO (Normally Open) and 1 NC (Normally Closed) contact.
Dimensions: The relays have pin dimensions of 1.0 x 0.3 mm and 1.0 x 0.4 mm, with a recommended PCB drilling diameter of 1.3 mm.
Coil Data: At 20°C, the nominal power is 0.45 W, and the holding power is 0.18 W. The coil limit temperature is 120°C. Various nominal voltages are provided, ranging from 5.0 VDC to 60.0 VDC, with corresponding pick-up and drop-out voltages, currents, and resistances.
Insulation Data: The rated insulation voltage is 250 VAC, with double or reinforced insulation requiring a minimum air and creepage distance of 5.5 mm or 8 mm, and a test voltage of 4,000 Vrms for 1 minute. The insulation resistance is at least 100 MΩ.
Mechanical Data: The mechanical lifetime is at least 10 million operations, with a maximum switching frequency of 15 Hz. The response time for NO contacts is typically 10 ms, and the drop-out time for NC contacts is 3 ms. The relay can withstand shocks of 17g for NO and 10g for NC, and vibrations of 7g for NO and 3g for NC.
Other Data: The ambient temperature range is -40°C to +85°C, with a thermal resistance of 45 K/W. The protection class is RT II, and the solder bath temperature is 270°C for 5 seconds. The relays are approved by cULus and TÜV, with a flammability class of UL 94 V-0.
Contact Data: The contact material is AgCuNi with a gold layer of 0.2 to 0.4 μm. The rated switching power is 1,500 VA, with a maximum of 250 V / 6 A for AC-1. The electrical lifetime is 90,000 operations at 0.1 Hz. The inrush current is 30 A for 20 ms, and the switching voltage range is 5 to 250 V DC/AC.
Approvals and Options: The relays have various approvals and options for different pin lengths and coil designs. The product key provides details on type designation, number of contacts, connection technology, nominal coil voltage, and options.
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Catalog excerpts

SISF2 Series-1

Contact data - Relay with forcibly guided contacts according to IEC 61810-3 - Application type A - Protective separation (see insulation data) - Suitable for print mounting - Height only 13 mm - Contact assembly SISF112: 1 NO + 1 NC Contact material AgCuNi + 0,2, ..., 0,4 μm Au Type of contact Single contact with notched crown Rated switching power 1 500 VA 250 V / 6 A / AC-1 (max.) Electr. life time (0,1 Hz, rel. duty cycle 10%) 90 000 Inrush current 30 A for 20 ms Switching voltage range 5, ..., 250 V DC / AC Switching current range* 3 mA, ..., 6 A Switching power range* 40 mW, ..., 1 500 W (VA) Contact resistance as new (max.) 100 mΩ Short circuit resistance of contacts** 1 000 A with pre-fuse SCPD 6 A gG / gL (fuse) * Reference values ** Prospective short-circuit current Electrical life (NO contacts) Circuit diagram (top view) Insulation data Rated insulation voltage (IEC 60664-1) 250 VAC Double or reinforced insulation - Air and creepage distance (min.) 5,5 mm - Test voltage 4 000 Vrms / 1 min Double or reinforced insulation - Air and creepage distance (min.) 8 mm - Test voltage 4 000 Vrms / 1 min Open contact: Test voltage* 1 500 Vrms / 1 min Contact opening: open contact micro-disconnection Creepage resistance CTI 175 Pollution degree 2 Overvoltage category III Insulation resistance (min.) 100 MΩ - Test voltage 500 VDC * Initial value Pin dimension b Pin dimension c Recommended drilling on PCB Nominal power (typ.) Holding power (typ.) Coil limit temperature Mechanical data Switching capacity (IEC 61810-1) AC-1: 240 V / 6 A MAX AC-15: 240 V / 3 A MAX DC-1: 24 V / 6 A MAX DC-13: 24 V / 3 A / 0,1 Hz MAX L/R = 40 ms Switching capacity (UL 508) B300, R300 Continuous current per contact at load of: 1 contact 6 A MAX Contact load limit curve (DC) Excitation voltage range Mechanical lifetime (min.) 10 x 106 operations Switching frequency (max.) 15 Hz Response time (NO closed) (typ.) 10 ms Drop-out time (NC closed) (typ.)* 3 ms Bounce time (typ.) NO: 2 ms / NC: 15 ms Shock resistance (16 ms) (min.) NO: 17g / NC: 10g Vibration resistance (10-200 Hz) (min.) NO: 7g / NC: 3g Weight approx. 16 g Mounting position any Mounting distance (min.) 5 mm * without coil wiring  Other data Ambient temperature Thermal resistance Protection class Solder bath temperature Test method (heating) Approvals Flammability class UL File -40 °C, ..., +85 °C 45 K / W RT II 270 °C / 5 s A (group assembly) cULus, TÜV UL 94 V-0 E503 456 Sec.1 Options, Accessories Other pin lengths Other coil designs possible possible Product key SISF SISF 1 1 2 24VDC XX Test conditions: - Graph 1: Contact current 4 A MAX - Graph 2: without previous operation - Free-standing relay on PCB - Duty cycle 100% ELESTA GmbH, Heuteilstrasse 18, CH - 7310 Bad Ragaz, Switzerland Type designation Number of contacts NO Number of contacts NC Connection technology Nomina

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