Pulse Electronics Distributor

PH9185NL Switch Mode Power Transformers


Reinforced insulation power supply from Pulse for transceiver ICs


Pulse Electronics' PH9185NL Switch Mode Power TransformersPulse Electronics Corporation, a leading provider of electronic components, introduces a series of high isolation, switch-mode power transformers. These provide a reinforced insulation power supply for RS485 and RS232 transceiver ICs. The transformers come on an SMD platform with offset pins to maintain a large separation between primary and secondary circuits. Applications include industrial control systems, building automation, smart grid, surveillance, and aeronautics. The Pulse Electronics PH9185NL transformers facilitate using a RS485/232 communications bus as a low cost alternative to Ethernet. They are compatible with the Maxim™ MAX253 power driver IC.

In accordance with IEC60950/EN61558, the construction of the PH9185NL series has been certified by UL/TUV for reinforced insulation up to a 400 V working voltage. The design guarantees 8 mm creepage and 4000 Vrms isolation voltage to meet this requirement. The design also utilizes Pulse Electronics’ Class F insulation system. Pulse Electronics’ PH9185NL series consists of seven turns ratios to provide the required voltage to the IC from a range of low voltage levels delivering up to 3 W of power. Datasheet

Digi-Key P/N Manufacturer P/N Description
553-2052-1-ND PH9185.011NLT TRANSFORMER 750UH 1:1 SMD
553-2053-1-ND PH9185.012NLT TRANSFORMER 450UH 1:2 SMD
553-2054-1-ND PH9185.013NLT TRANSFORMER 200UH 1:3 SMD
553-2055-1-ND PH9185.021NLT TRANSFORMER 880UH 2:1 SMD
553-2056-1-ND PH9185.034NLT TRANSFORMER 750UH 3:4 SMD
553-2057-1-ND PH9185.038NLT TRANSFORMER 310UH 3:8 SMD
553-2058-1-ND PH9185.043NLT TRANSFORMER 1260UH 4:3 SMD
553-2059-1-ND PH9185.083NLT TRANSFORMER 560UH 8:3 SMD