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    24V DC 5A 120W Switching Power Supply

    Industrial 24V DC switching power supply converts AC to DC, mountable in DIN rail with rated current 5A and rated power 120W. It is durable, reliable and safe which is ideal for powering devices, home appliances, industrial equipment etc.
    SKU: ATO-SMPS-120-24
    Free shipping
    Delivery date: 6-12 days



    • AC input range selectable by switch
    • Protections: short circuit, overload, overvoltage and over temperature
    • Cooling by free air convection
    • Installed on DIN rail TS-35/7.5 or 15
    • LED indicator for power on
    • 100% full load burn-in test


    Basics Model ATO-DR-120-24
    Dimension 65.5*125.2*100mm (W*H*D)
    Weight 0.79kg
    Output DC Voltage 24V
    Rated Current 5A
    Current Range 0~5A
    Rated Power 120W
    Ripple & Noise (max.)( Note 2) 80mVp-p
    Voltage Adjust Range 24~28V
    Voltage Tolerance (Note 3) ±1.0%
    Line Regulation ±0.5%
    Load Regulation ±1.0%
    Setup, Rise, Holdup time(Typ.) 500ms, 70ms, 36ms /230V AC  500ms, 70ms, 32ms/115VAC at full load
    Input Voltage Range 88 -132V AC/176 - 264V AC by switch, 248 - 370V DC
    Frequency Range 47~63Hz
    Efficiency(Typ.) 84%
    AC Current(Typ.) 2.6A/115V AC 1.6A/230V AC
    Inrush Current (Typ.) Cold start, 20A/115V AC; 40A/230V AC
    Leakage Current <3.5mA/240V AC
    Protection Overload 105~150% rated output power
    Protection type : Constant current limiting, recover automatically after fault condition is removed
    Overvoltage 29 ~ 34V
    Protection type: Shut down O/P voltage, and re-power on to recover
    Over temperature 90"C+5"C(TSW1)
    Protection type: Shut down O/P voltage, and recover automatically after temperature goes down
    Safety & EMC Safety Standards Approved by Ul508, UL60950-1, TUV EN60950-1
    Withstand Voltage l/P-0/P:3KVAC l/P-FG:1.5KVAC 0/P-FG:0.5KVAC
    Isolation Resistance l/P-O/P, l/P-FG, 0/P-FG: 100M Ohms/ 500VDC/ 25°C/ 70% RH
    EMC Emission Compliance to EN55011, EN55022 (CISPR22), EN61204-3 Class B,EN61000-3-2,-3
    EMC Immunity Compliance to EN61000-4-2, 3, 4, 5, 6, 8, 11, EN55024, EN61000-6-2, EN61204-3, heavy industry level, criteria A
    Environment Working Temperature -10 ~ +60°C
    Working Humidity 20~90% RH (non-condensing)
    Storage Temperature -20~+85°C
    Humidity 10~95% RH (non-condensing)
    Temperature Coefficient ±0.03%/°C (0~50°C)
    Vibration Component 10 ~ 500Hz, 2G 10min./1 cycle, period for 60min. each along X, Y, Z axes
    Mounting Compliance to IEC60068-2-6
    MTBF 432.1K hrs min. MIL-HDBK-217F (25°C)
    Note 1. All parameters NOT specially mentioned are measured at 230V AC input, rated load and 25°C of ambient temperature.
    2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uf & 47uf parallel capacitor.
    3. Tolerance includes set up tolerance, line regulation and load regulation.
    4. The switching power supply is considered a component which will be installed into final equipment. Please make sure that the final equipment still meets EMC directives.

    120W SMPS dimensions
    Tips: Protective circuit of DC switching power supply

    1. Protective circuit for overcurrent
      To protect modulation tube from being burned out in short circuit or instant increase of current, DC switching power supply cuts off power when output current exceeds a threshold value and sets the modulation tube at reverse bias.
    2. Protective circuit for overvoltage
      Overvoltage protection of switch regulator in DC switching power supply refers to input overvoltage protection and output overvoltage protection. If unregulated DC voltage used by switch regulator appears excessively high (such as accumulator and rectifier), the regulator will be unable to work properly or will even damage its internal components. Therefore, switching power supply must be equipped with input overvoltage protective circuit.
    3. Protective circuit for overheat
      Highly-integrated, small-size and light-weight switch regulator in DC switching power supply has greatly improved power density of unit volume. If requirements for working temperature of internal components of the power supply fall behind, the performance of the circuit will become poorer and the components will be even ineffective. Therefore, high-power DC switching power supply shall be provided with overheat protective circuit.
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