DATASHEET Pulse Transformers IT series with double secondary winding Pulse Transformer with Double Secondary Winding Galvanic separation of drive and power circuit Approvals Voltage resistance up to 4 kV Ignition current up to 1 A Turns ratio up to 3:1:1 Features and benefits Galvanic separation with secondary winding Voltage resistance up to 4 kV Allows high potential difference voltage scaling Vacuum potting Very low partial discharge effects PCB through hole mounting Custom-specific versions on request Technical specifications Typical applications Up to 500 V Nominal operating voltage Gate drive circuit Operating frequency 40 kHz max. 500 kHz max. for data transmission Power supplies DC to 40000 Hz Power converters Ignition currents 0.025 to 1 A 40C Frequency converters Rise time 0.4 to 4 s Switching applications Up/50 Hz/2 s max. according to VDE 110b Test voltage DC/DC converters Max. partial discharge voltage nom 1.5 x U Line coupling transformers in high-speed data Temperature range (operation and storage) -25C to +70C (25/70/21) transmission Flammability corresponding to UL 94 V-0 listed materials2 EMC/EMI Products Schaffner Group Datasheets 11 Oct 2018 Pulse transformer selection table Pulse transformer Turns ratio Ignition Voltage Voltage Rise Inductance * Resistance Coupling Input/Output Weight current time area time capacitance connections Iign Unom Up V0t tr Lp Lstr Rp Rs Ck A V kV Vs s mH H pF g IT 143 1:1:1 0.025 500 4 800 0.6 15 200 3 3 10 02 14 IT 242 1:1:1 0.1 500 3.2 250 0.9 2.5 75 0.75 0.75 7 02 6 IT 243 1:1:1 0.1 500 3.2 250 1 2.5 85 0.8 0.8 7 02 6 IT 213 1:1:1 0.25 380 2.5 450 0.4 6.5 20 1.4 1.4 40 02 9 IT 233 1:1:1 0.25 500 4 300 1.3 3 45 0.8 0.8 7 02 13 IT 253 1:1:1 0.25 500 3.2 160 1.3 1.1 45 0.55 0.55 6 02 6 IT 312 1:1:1 0.25 380 2.5 1200 1 21 35 2.4 2.7 30 02 24 IT 313 1:1:1 1 380 2.5 450 0.6 3 6 0.33 0.4 27 02 24 IT 249 2:1:1 0.25 500 3.2 330 4 17 140 3.1 1.5 9 02 6 IT 244 3:1:1 0.1 500 3.2 200 0.7 15 70 2.8 0.9 9 02 6 IT 234 3:1:1 0.25 500 4 280 1 17 40 2 0.7 9 02 13 IT 314 3:1:1 1 380 2.5 500 1 35 20 1.6 0.7 30 02 25 * Tolerance: +50% -30% Explanations: t rise time at given load resistor R and 70% of the output pulse height. r L primary inductance measured at 1 kHz (secondary coile open). p Lstr stray inductance measured at the secondary side, short circuit at the primary side. If there are several secondary coils only one at the time is connected (measuring frequency 10 kHz). The ignition current is a set peak value where the voltage drop over the coil resistance is still insignificant (mostly below 1 V). Mechanical data IT 213 IT 243, IT 244, IT 249, IT 253 IT 242 IT 143, IT 154, IT 233, IT 234