The CSE187L-P is a low-frequency current sense transformer designed to monitor current in AC circuits. It features a 1:500 primary-to-sense turns ratio and is capable of monitoring currents from 0.1 to 30 Arms at frequencies between 50 Hz and 400 Hz. This encapsulated transformer has a maximum primary DCR of 270 micro-ohms, a maximum sense DCR of 21 ohms, and is 100% tested for a hi-pot of 4000V between windings. With an operating temperature range of -40°C to 105°C, it is suitable for current monitoring applications in various electronic systems.