The ECST1V0504 is an SMT current sense transformer designed for applications requiring precise current monitoring. It features a compact EE4.4 package, very low DC resistance, and a wide selection of turns ratios. This transformer is suitable for switching power supplies, feedback control, overload sensing, and load drop/shut down detection, operating effectively within a frequency range of 50 kHz to 1 MHz.
| Part Number | Turns Ratio (sec:pri) | Secondary Inductance (H) @ 100 kHz, 0.1 V min | Secondary DCR () max | Primary DCR (m) ref | Hi-pot (pri to sec) @ 2 mA, 3 sec, 50 Hz | Sensed Current (A) max |
|---|---|---|---|---|---|---|
| ECST1V0504-1020-R | 20:1 | 33 | 0.35 | 3 | 500 Vac | 7 |
| ECST1V0504-1030-R | 30:1 | 74 | 0.8 | 3 | 500 Vac | 7 |
| ECST1V0504-1040-R | 40:1 | 132 | 1.6 | 3 | 500 Vac | 7 |
| ECST1V0504-1050-R | 50:1 | 205 | 2.5 | 3 | 500 Vac | 7 |
| ECST1V0504-1060-R | 60:1 | 295 | 3.6 | 3 | 500 Vac | 7 |
| ECST1V0504-1070-R | 70:1 | 400 | 4.6 | 3 | 500 Vac | 7 |
| ECST1V0504-1100-R | 100:1 | 820 | 9.5 | 3 | 500 Vac | 7 |
| ECST1V0504-1125-R | 125:1 | 1280 | 13 | 3 | 500 Vac | 7 |
| ECST1V0504-1150-R | 150:1 | 1800 | 21 | 3 | 500 Vac | 7 |