PDF Series 300-500W Full brick power supply.Product details are as follows: â?»Features Wide range of input voltage Design for high reliability,long lifetime Under-voltage protection for input Full load efficiency up to 88% High voltage input,high output power Wide range of power,easy toupgrade Conditions:All specifications are tested under the room temperature 25, normal input voltage and pure negative normal load. â?»Input Characteristic Voltage Range 24VDC (Normal Rated Value): 18ï½?36 VDC 48VDC (Normal Rated Value): 36ï½?72 VDC 110VDC (Normal Rated Value): 66ï½?154 VDC 300VDC (Normal Rated Value):200-400 VDC â?»Output Characteristic Voltage set-point accuracy â?¦â?¦±2% Line Regulation (full load) â?¦â?¦±0.5% Load regulation (20%-100%load) â?¦â?¦±0.5% â?»General Characteristic Switching frequency â?¦â?¦â?¦200-350 KHz Isolation resistance â?¦â?¦â?¦200 MΩ â?»Isolation voltage Input-output: >1500 VDC Input-case: >1050 VDC Output-case: >500 VDC â?»Environmental Characteristic Substrate Working Temperature â?¦â?¦â?¦Industry: -40-+100 Storage temperature â?¦â?¦â?¦â?¦â?¦â?¦â?¦â?¦Industry: -45-+105 â?»REM Features Positive Logic:High level or no connect working â?»Dimensions:116.80*61*12.70mm â?»Protection Features Input under voltage protection Output short circuit protection Input over voltage protection        Output over current protection Output over voltage protection        Over temperature protection â?»Model selection Input Voltage (V) Input Voltage Range (V) Output Voltage (V) Output Current (A) Ripple pk-pk (mv) Efficieency (Typ) Models Single 24 18-36 24 20.8 200 88% PDF500-24S24 48 36-72 24 20.8 200 89% PDF500-48S24 110 66-154 24 20.8 200 89% PDF500-110S24 300 200-400 12 33.3 120 88% PDF400-300S12 300 200-400 24 20.8 200 88% PDF500-300S24 300 200-400 28 17.8 280 88% PDF500-300S28 300 200-400 48 10.4 300 89% PDF500-300S48