Holt Integrated Circuits PM-DB2725EX is a single-core MIL-STD-1553 isolation transformer offering 1:2.5 and 1:1.79 transformer ratios in a through-hole package. Intended for the signal-isolation stage of a data-bus interface, it provides a passive magnetic component option for avionics communication boards, instrumentation, and interface test equipment. Holt lists a temperature range of -55°C to +130°C and Moisture Sensitivity Level 3 for this exact model. The PM-DB2725EX is identified as non-RoHS-compliant, making compliance review important during component selection. Designers should verify winding connections, transceiver compatibility, and the latest electrical specifications before integrating it into a production assembly. | 
