Introducing our new series of high isolation transformers that come in a standard SMT package:  The PH9185 Series.

The PH9185 series is a new addition to our line of switch mode transformers and provides a reinforced insulation power supply that’s compatible with the MAXIM™ MAX253 to power RS-485/RS-232 transceivers. The transformers operate in a fixed duty cycle push-pull topology that delivers lower power (up to 3W) from a low voltage source and a working voltage up to 4000V, with 5000V isolation and only 8mm creepage.

Gerard Healy, Product Manager at Pulse Electronics Power Division noted about the new series:

“Pulse’s isolation transformers are unique because the customized EP7 platform has a large separation between the core and pin in a surface mount package. For standard SMD platforms (EP and others), the pin is generally close to the core so it’s not suitable for high isolation. High isolation transformers tend to be through-hole, with an offset pin, and oversized to meet isolation requirements, so they are relatively large for the low powers they are delivering. Pulse’s design provides a large safety separation (8mm creepage distance) between pins without over-sizing the device itself, so it is high isolation and safety agency compliant in a compact surface mount package.”

PH9185 Features

These switch mode high isolation transformers are RoHS compliant and meet standard EIA481 requirements. They have been certified by UL to comply with UL60950-1 2 edition, by CAN/CSA C22.2 NO. 60950-1-07 2 edition, and by TUV to comply with EN61558-1 and EN61558-2-16 with reinforced insulation. 4000Vrms isolation voltage is guaranteed to meet this requirement. This series is available in tape-and-reel packaging.

  • Push Pull Converter Transformer
  • Reinforced insulation for isolated power supply driver
  • Compatible with MAXIM™ MAX253 to power RS-485/RS232 transceiver and other communication interfaces
  • 8mm creepage, 5KVrms isolation
  • UL, CAN/CSA and TUV certification
  • RoHS compliant and meet standard EIA481 requirements

PH9185 Applications

These low cost, efficient transformers offer high power density and safety isolation for use in:

  • Industrial control systems
  • Building automation
  • Smart grid
  • Surveillance
  • Automotive
  • Renewable energy
  • Aeronautics

PH9185 Mechanicals & Schematics


Lead time is eight weeks. Samples are available.

Download Datasheet | View Press Release