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The Astrodyne TDI OFM-0203 is a 20-watt ultraminiature open frame switching power supply. It provides a regulated 15VDC output with a maximum average current of 1.4A and a peak current of 1.7A. The unit operates with a universal input voltage range of 90-264 VAC and a frequency of 47-63 Hz.
Key electrical specifications include a typical efficiency of 75%-78% at nominal input, load regulation of ±0.5%, and line regulation of ±0.1% to ±1%. It offers 3000 VAC isolation between input and output and 1500 VAC isolation to ground. The power supply has a hold-up time of 14ms at 120 VAC and features continuous short circuit protection with auto-recovery.
Mechanically, the OFM-0203 has an open frame construction with dimensions of 2.0" x 3.5" x 0.80". It is designed for chassis mounting and operates within an ambient temperature range of 0°C to 50°C, with derating applied. The power supply is suitable for ITE (Commercial) applications and meets safety standards including IEC 60950-1, UL/cUL, and CSA C22.2, with EMC compliance to EN 55011 Class B.
The nominal input voltage is 100-240 VAC, with a range of 90-264 VAC.
The output is 15 VDC at 1.4 A average, with a peak current of 1.7 A.
The operating temperature range is 0°C to 50°C with derating.
It is an open frame, chassis mount power supply.
Yes, it has continuous short circuit protection with auto recovery.
It has cURus, UL/cUL, and CSA C22.2 safety approvals per IEC 60950-1.
Typical efficiency is 75% to 78% at nominal input.