Latest TTM305 Series AC/DC Switching Power Supply is Designed for Industrial and Medical Applications

Press Release Summary:

  • Offered in 5 x 3 x 1.5 in. (L x W x H) profile and equipped with overvoltage, overcurrent, and short circuit protections
  • Withstands voltage of input to output (4000 VAC), input to ground (1500VAC) and output to ground (1500VAC)
  • Operated in 0°C to +70°C temperature range with universal input of 90 to 264 VAC and provides minimum MTBF of 300,000 hrs

Original Press Release:

Medical / ITE 305 Watt Open Frame Power Supplies with Compact Size of 5” x 3” x 1.5”

March 2019 — Santa Clara, California, USA — Tumbler Technologies, Inc. + TRUMPower announces the release of the TTM305 series to its AC/DC switching power supply line-up. The TTM305 series is certified to the latest medical IEC 60601-1 Edition 3.1 and industrial IEC 60950-1 2nd Edition standards, making it suitable for both medical and industrial applications.

The TTM305 series is able to deliver 305W of continuous output power at 11 CFM forced air or up to 255W at convection cooling. It comes as an open frame PCB in a low profile of 5” (L) by 3” (W) by 1.5” (H) and is equipped with overvoltage, overcurrent, and short circuit protections. The TTM305 also has a low earth leakage current measuring 100µA and provides 5V/1A of standby power along with fan power of 12V/0.3A for the 12/48V models and 24V/0.2A maximum for the 24V output model. It can withstand a voltage of 4000VAC from input to output (2 MOPP), 1500VAC from input to ground and 1500VAC from output to ground.

Operating at a 90 to 264 VAC universal input, the 305W rated power supplies are available with 12V, 24V, and 48V outputs and can operate in ambient temperatures ranging from 0°C to +70°C (derating linearly to 50% load from 50°C to 70°C). The power supply’s active efficiency is 90% minimum at full load and has a no load input power consumption of 0.5W maximum when utilizing the remote off feature. Its 300,000 hours-minimum MTBF at full load at 25°C ambient per Telcodia SR-332 makes it a highly reliable power supply.

The TTM305 is approved to the latest medical standards, including IEC/EN 60601-1 Edition 3.1, ANSI/AAMI ES 60601-1: 2012, CSA C22.2 No. 60601-1: 2014 and the IEC/EN/UL 60950-1 2nd edition ITE standards. The power supply complies with IEC/EN 60601-1-2 4th edition medical EMC and immunity standards including EN 55011/FCC/CISPR11 class B (conducted and radiated emissions), EN 61000-3-2, EN 61000-4-2, EN61000-4-3, EN 61000-4-4, EN 61000-4-5, EN 61000-4-6, EN 61000-4-8, EN 61000-4-11.

For more details on the TTM305 series, please visit or email

TRUMPower has been delivering excellent quality medical and industrial grade AC/DC switching power supplies and DC/DC converters since 1991. The company’s medical grade power supplies range from 4W to 1200W and its line of ITE grade AC/DC power supplies range from 3W to 1400W in wall mount, desktop, open frame, and ATX PC form factors. TRUMPower can accommodate to OEM’s needs, whether they are low volume or high volume power supplies, by providing prompt responses and cost-effective power solutions. As a result, it has gained a substantial number of satisfied customers over the years and continues to do so.

For more information on the company and its other products, visit or email us at

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