772 Series www.murata-ps.com Pulse Transformers SELECTION GUIDE Order Code C Parameter 2C HV 4C 5C 8C 9C Units 0 3 0 0 0 0 2 0 2 2 2 2 7 2 7 7 7 7 7 7 7 7 7 7 7 Turns ratio 1:1:1 2:1:1 1:1 1:1:1 1:1:1 2:1:1 FEAATTUURREESS Primary Inductance 1.0 1.0 4.0 4.0 16.3 16.3 mH (Min.) (cid:132)(cid:3)RoHS compliant Primary Et Constant 120 120 240 240 482 482 Vμs (cid:132)(cid:3)Inductance to 16.3mH (Min.) Leakage Inductance (cid:132)(cid:3)Up to 482 Vμs Et rating 3.0 3.5 5.0 11 40 40 μH (Max.) (cid:132)(cid:3)PCB mounting Interwinding 40 30 55 35 40 40 pF Capacitance (Max.) (cid:132)(cid:3)UL 94 V-0 package materials DC Resistance (Max.) 0.25 0.24 0.86 0.90 3.60 3.50 (cid:132)(cid:3)Up to 4000Vrms isolation Primary winding (cid:132)(cid:3)Backward compatible with DC Resistance (Max.) 0.22 0.12 0.83 0.76 3.10 1.60 Ω Secondary1 winding Sn/Pb soldering systems DC Resistance (Max.) 0.28 0.15 - 1.10 4.20 2.00 Secondary2 winding DESCRIPTION Isolation voltage (flash 2.5 4.0 2.5 kVrms tested for 1 second) The 772 series of pulse transformers are intended for medium power applications in switch mode power supplies and thyristor/triac firing (e.g. SELECTION GUIDE motor control applications). The standard turns Order Code rtinha rtsieoeesr i wemsina.dy ibneg sm boyd cifioendn eocnt ianngy a tnrayn tswfoor wmienrd winigths Parameter 77201C 77203C 77205SC 77206C 77207C Units Turns ratio 1:1 2:1:1 1:1:1 2:1:1 1:1 Primary Inductance 1.0 1.0 4.0 4.0 16.3 mH (Min.) Primary Et Constant 120 120 240 240 482 Vμs (Min.) Leakage Inductance 2.0 3.5 11 11 18 μH (Max.) Interwinding 50 30 18 35 65 pF Capacitance (Max.) DC Resistance (Max.) 0.25 0.24 0.90 0.84 3.50 Primary winding DC Resistance (Max.) 0.23 0.12 0.76 0.38 3.40 Ω Secondary1 winding DC Resistance (Max.) - 0.15 1.10 0.50 - Secondary2 winding Isolation voltage (flash 2.5 kVrms tested for 1 second) For full details go to Specifications typical at T= 25°C A www.murata-ps.com/rohs www.murata-ps.com/support KMP_772C_D01 Page 1 of 3

772 Series Pulse Transformers ABSOLUTE MAXIMUM RATINGS Operating free air temperature range 0°C to 70°C Storage temperature range -60°C to 125°C Lead Temperature 1.5mm from case for 10 seconds 300°C SOLDERING INFORMATION1 Peak wave solder temperature 300˚C for 10 seconds Pin finish Matte tin with nickel pre-plate TECHNICAL NOTES ISOLATION VOLTAGE REPEATED HIGH-VOLTAGE ISOLATION TESTING ‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Voltage’, ‘Dielectric Withstand It is well known that repeated high-voltage isolation testing of a barrier component Voltage’ & ‘Isolation Test Voltage’ are all terms that relate to the same thing, a test can actually degrade isolation capability, to a lesser or greater degree depending on voltage, applied for a specified time, across a component designed to provide electrical materials, construction and environment. This series has toroidal isolation transformers, isolation, to verify the integrity of that isolation. with no additional insulation between primary and secondary windings of enameled All products in this series are 100% production tested at their stated isolation voltage. wire. While parts can be expected to withstand several times the stated test voltage, the isolation capability does depend on the wire insulation. Any material, including this A question commonly asked is, “What is the continuous voltage that can be applied enamel (typically polyurethane) is susceptible to eventual chemical degradation when across the part in normal operation?” subject to very high applied voltages thus implying that the number of tests should be For a part holding no specific agency approvals both input and output should normally strictly limited. We therefore strongly advise against repeated high voltage isolation be maintained within SELV limits i.e. less than 42.4V peak, or 60VDC. The isolation test testing, but if it is absolutely required, that the voltage be reduced by 20% from speci- voltage represents a measure of immunity to transient voltages and the part should fied test voltage. never be used as an element of a safety isolation system. The part could be expected to function correctly with several hundred volts offset applied continuously across the This consideration equally applies to agency recognized parts rated for better than isolation barrier; but then the circuitry on both sides of the barrier must be regarded functional isolation where the wire enamel insulation is always supplemented by a as operating at an unsafe voltage and further isolation/insulation systems must form further insulation system of physical spacing or barriers. a barrier between these circuits and any user-accessible circuitry according to safety standard requirements. 1 For further information, please visit www.murata-ps.com/rohs www.murata-ps.com/support KMP_772C_D01 Page 2 of 3

772 Series Pulse Transformers PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS RECOMMENDED FOOTPRINT DETAILS 25.40 (1.00) 1 3 Ø1.20+0.15-0.00 (Ø0.472+0.006-0.000) 2 4 0.3 0 77202C 5 (0.7 9 YYWW 9) 2.54 (0.1) 2 6 2.54 (0.1) 5.92 (0.233) Unless otherwise stated all dimensions in mm (inches) ± 0.25 (0.01). 12.30 (0.484) TUBE DIMENSIONS 12.5 (0.492) 4) 0.66 (0.026) Max. 52 2.53 (0.100) 13.30 (0. 0 (0.886) 5 2. 2 5.08 (0.2) 15.24 (0.6) 5) 20 5.08 10 0.0. (0.2) ±± 50 73 (03..10250) 20.32 (0.8) 0.(0.0 11.50 (0.453) All dimensions in mm (inches) XX.X±0.50(0.02), XX.XX±0.25(0.01). Tube length: 530 (20.87) Max. All pins on a 2.54 (0.1) pitch. Unless otherwise stated all dimensions in mm (inches) ± 0.25 (0.01). PIN CONNECTION STYLE - 8 PIN DIP (TOP VIEW) Screen* 1 3 Secondary 1 4 Primary 5 Secondary 2 2 6 * only on 77205SC This product is subject to the following operating requirements and the Life and Safety Critical Application Sales Policy: Refer to: http://www.murata-ps.com/requirements/ Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. © 2018 Murata Power Solutions, Inc. www.murata-ps.com/support KMP_772C_D01 Page 3 of 3

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: M urata: 77201 77209 77202 77201C 77202C 77203C 77203HVC 77204C 77205C 77205SC 77206C 77207C 77208 77208C 77209C