(0) Shopping cart
You have no items in your shopping cart.
Shopping Categories

    48V DC 4.2A 200W Switching Power Supply

    Affordable price 200W switching power supply converts AC input to 48V DC at a rated current of 4.2A with short circuit, overload and overvoltage protections. SMPS power supply is high efficiency and high reliability, ideal DC power supply for wide applications.
    SKU: ATO-SMPS-200-48
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days


    • Universal AC input range selectable by a switch
    • Protections: short circuit, overload and overvoltage
    • Cooling by free air convection
    • LED indicator for power on
    • 100% full load burn-in test
    • Low cost and high reliability


    Model ATO-S-200-48
    DC Voltage 48V
    Rated Current 4.2A
    Current Range 0 ~ 4.2A
    Rated Power 200W
    Ripple & Noise (Max.)(Note 2) 100mVp-p
    Voltage Adjust Range 43 ~ 53V
    Voltage Tolerance (Note 3) ±1.0%
    Line Regulation ±0.5%
    Load Regulation ±0.5%
    Setup, Rise, Holdup Time 100ms, 50ms, 20ms at full load
    Input Voltage Range 88 ~ 132VAC/176V~264VAC (selected by a switch) or 255 ~ 370VDC
    Frequency Range 47~63Hz
    Efficiency (Typ.) 87%
    AC Current (Typ.) 3.2A/115V AC 1.6A/230V AC
    Inrush Current (Typ.) Cold start: 35A
    Leakage Current <3.5mA/240V AC
    Protection Overload 105~150% rated output power
    Protection type: Shut down output voltage, re-power on to recover.
    Overvoltage 55.2~64.8V
    Protection type: Shut down output voltage, re-power on to recover.
    Environment Working Temperature -10 ~ +60℃
    Working Humidity 20~90% RH non-condensing
    Storage Temperature -20~+85℃
    Storage Humidity 10~95% RH non-condensing
    Temperature Coefficient ±0.03%/℃ (0~50℃)
    Vibration 10 ~ 500Hz, 2G 10min./1 cycle, period for 60min. each along X, Y, Z axes
    Safety & EMC (Note 4) Safety Standards UL1012 Approved
    Withstand Voltage I/P-O/P: 1.5KVAC I/P-FG: 1.5KVAC O/P-FG: 0.5KVAC
    Isolation Resistance I/P-O/P, I/P-FG, O/P-FG: 100M Ohms/500VDC/25℃/70% RH
    EMC Emission Compliance to FCC Part 15 J conduction Class B
    EMC Immunity Compliance to EN61000-4-2, 3, 4, 5, 6, 8, 11, EN55024, light industry level, criteria A
    Others MTBF ≥286.7K hrs MIN. MIL-HDBK-217F (25℃)
    Dimension 199*110*50mm (L*W*H)
    Weight 0.8kg
    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.

    Dimensions (Unit: mm)

    150W switch-mode power supply dimensionSMPS terminal pin number assignment


    48V Switching Power Supply Details

    SMPS Power Supply Applications

    • Power Tools
      Electric Saw, Drilling Machine, Ginder, Sand Blast Machine, Puching Machine, Weeding Machine, Air Compressor, etc.
    • Offices Devices
      Computer, Printer, LCD Monitor, Scanning Machine, etc.
    • Electrics & Household Appliance
      TV, VCRS, Radio, Dust Collector, Fan Lamp or LED Strip, Sewing Machine, Microwave Oven, Fridge/Freezr, Coffemarker, etc.
    • Industrial Equipemnt
      Monitoring Equipment, Shipping, Vehicle, Metalhalide Lamp, Solar System, Wind Power Generation, etc.

    Tips: How to lower ripple nose of switching power supply (SMPS)?

    1. Strengthen the inductor and filtering of output capacitor

    According to a formula about the switching power supply, current fluctuation in the inductor forms up an inverse relationship with the inductance. In addition, output ripples constitute inverse relationship with capacitance. Increase of inductance and output capacitance can reduce ripples, but this measure just plays a minor role.

    2. Secondary smoothing means adding another LC filter

    LC filter performs well in inhibiting noise ripples. To reduce ripples of SMPS power supply, users shall select appropriate inductors and capacitors to form up a filter circuit according to frequency of ripples to be removed.

    3. Connect switching power supply output to LDO filter

    It serves as an effective way to reduce the SMPS ripples and noises. This method can help users maintain a constant voltage without changing original feedback system, but it brings about highest costs and energy consumption.

    4. Connect capacitor C or RC to diode in parallel

    Values of capacitor C or RC connected to the diode in parallel can be determined only by repeated experiments. If the values are set in a false way, it may cause serious oscillating.

    5. Diode post inductance (EMI filter)

    It is a common way to curb high-frequency noise of the switching power supply. Users need to select appropriate inductors according to frequency of noise. This method can effectively inhibit noise, but it shall be noticed that the rated current of inductors must comply with actual demands.

    Write your review for 48V DC 4.2A 200W Switching Power Supply
    • Only registered users can write reviews
    • Bad
    • Excellent
    Customers who bought this item also bought

    48V DC 2A 100W Switching Power Supply

    SKU: ATO-SMPS-100-48
    48V DC switching power supply converts universal AC input to DC output with rated current 2A. High performance and favorable price SMPS has a wide range of application in power tools, office equipment, home appliance and industrial control equipment.

    12V DC 8.5A 100W Switching Power Supply

    SKU: ATO-SMPS-100-12
    Switching power supply converts full range AC to DC 12V, rated current 8.5A and rated power 100W, with overvoltage and overload protection. High quality and high efficiency SMPS power supply suitable for light strip, computer, printer, industry control system, and home appliances.

    12V DC 4.2A 50W Switching Power Supply

    SKU: ATO-SMPS-50-12
    Cheap yet quality 12V DC switching power supply with universal AC input, works at 4.2A rated current and 50W rated power with short circuit and overload protection, best SMPS power supply for office devices, household appliance and industrial equipment.