The CST25-0100 from Triad Magnetics is through hole mounting current sense transformer (invasive) with 50 to 500kHz frequency range, 25 A current rating, 18 mH inductance, turns ratio 1:100 primary:secondary, 2 Ohm DC resistance and PC pin termination. These current sense transformers are ideal for monitoring currents in high frequency applications such as switch-mode power supplies, LED lighting, etc. Dimensions of this transformer are: 0.669" L x 0.591" W x 0.472" H (17.00mm x 15.00mm x 12.00mm).