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    DC-DC Buck Converter, 24V to 13.8V/15V/19V

    Economical price 24V to 13.8V/ 15V/ 19V DC-DC buck converter module with 18V-36V or 23V-36V wide input voltage range, output stable 13.8V DC, 15V DC or 19V DC, more than 94% power conversion efficiency, step down 24 volt DC input to 13.8-19 volt DC output.
    SKU: ATO-DCDC-24138
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    ATO DC-DC buck converters with synchronous rectification technology is designed to step down the input rated voltage 24V DC to 13.8V/ 15V/ 19V DC output voltage, and different model are available for your applications.


    • Wide input voltage range: 18V to 36V, 18V to 40V or 23V to 36V.
    • Brand-new, die-cast aluminum shell and high quality design, maximum transfer efficiency of 94%.
    • This step down module comes with waterproof lever of IP68, moisture-proof & anti-shock protection.
    • Auto-recovery when the device is back to normal operating.
    • Built-in full protection against over/under voltage input, over-current, overload, overhead, over-temperature and short circuit.
    • Industry grade DC 24V to 13.8V/ 15V/ 19V buck converter, widely used in automotive, electricity, surveillance systems, railway signals, instruments, solar generates electricity, display screen of bus and taxi, car audio device, security systems, hospital equipment, telecommunications etc.

    5A DC-DC Buck Converter Specification

    Model ATOWG-24S13R805 ATOL2-1840245A ATOWG-24S1905
    Input Rated voltage 24V 24V 24V
    Voltage range 18-36V 18-40V 23-36V
    Efficiency 94% @ 24V input 95% @ 24V input 93% @ 24V input
    Output Voltage 13.8V 15V 19V
    Max. rated current 5A 5A 5A
    Max. rated power 69W 75W 95W
    Voltage regulation ±1% 1% <1%
    Load regulation 2% 2% <2%
    No load loss 70mA / 35mA
    Ripple & noise 120mV 200mV 100mV
    Environment Working temperature -40 ~ +80℃ -40 ~ +80℃ -40 ~ +80℃
    Working humidity 10% ~ 90%RH / 10% ~ 90%RH
    Storage temperature -40 ~ +100℃ / -40 ~ +100℃
    Function Short circuit protection YES YES YES
    Over current protection YES YES YES
    Waterproof IP68 IP68 IP68
    Over temperature protection YES YES YES
    Over voltage protection YES YES YES
    Mechanical Weight 300g 45g 290g
    Size 64*57*22mm 58*24*20mm 74*74*32mm

    24V to 13.8V DC-DC Buck Converter Model Selection

    Code Model Price Input Voltage Output Voltage Output Current Output Power Efficiency Size Download
    1 ATOWG-24S13R805 $49.29 24V DC 13.8V DC 5 Amps 69 Watts 94% 64*57*22mm ATO PDF
    2 ATOWG-24S13R810 $54.69 24V DC 13.8V DC 10 Amps 138 Watts 95.5% 64*57*22mm ATO PDF
    3 ATOWG-24S13R815 $56.29 24V DC 13.8V DC 15 Amps 207 Watts 96.2% 74*74*32mm ATO PDF
    4 ATOWG-24S13R820 $57.49 24V DC 13.8V DC 20 Amps 276 Watts 95.7% 74*74*32mm ATO PDF
    5 ATOWG-24S13R840 $71.49 24V DC 13.8V DC 40 Amps 552 Watts 96.9% 100*80*39mm ATO PDF
    6 ATOWG-24S13R850M $116.09 24V DC 13.8V DC 50 Amps 690 Watts 96.6% 100*80*36mm ATO PDF
    7 ATOWG-24S13R860M $100.19 24V DC 13.8V DC 60 Amps 828 Watts 96.3% 100*80*36mm ATO PDF
    8 ATOWG-24S13R8100M $150.99 24V DC 13.8V DC 100 Amps 1380 Watts 96.8% 140*120*42.5mm ATO PDF

    24V to 15V DC-DC Buck Converter Model Selection

    Code Model Price Input Voltage Output Voltage Output Current Output Power Efficiency Size
    1 ATOL2-1840241A $41.19 24V DC 15V DC 1 Amps 15 Watts 95% 58*24*20mm
    2 ATOL2-1840242A $42.59 24V DC 15V DC 2 Amps 30 Watts 95% 58*24*20mm
    3 ATOL2-1840243A $42.99 24V DC 15V DC 3 Amps 45 Watts 95% 58*24*20mm
    4 ATOL2-1840244A $43.49 24V DC 15V DC 4 Amps 60 Watts 95% 58*24*20mm
    5 ATOL2-1840245A $43.89 24V DC 15V DC 5 Amps 75 Watts 95% 58*24*20mm

    24V to 19V DC-DC Buck Converter Model Selection

    Code Model Price Input Voltage Output Voltage Output Current Output Power Efficiency Size
    1 ATOWG-24S1905 $48.79 24V DC 19V DC 5 Amps 95 Watts 93% 74*74*32mm
    2 ATOWG-24S1910 $50.89 24V DC 19V DC 10 Amps 190 Watts 92% 74*74*32mm
    3 ATOWG-24S1915 $53.89 24V DC 19V DC 15 Amps 285 Watts 93% 74*74*32mm

    Note: The series of 24V to 13.8V/ 15V/ 19V DC-DC buck converter models are all here, check the parameter carefully from the table and select the right converter power supply when place the order.

    13.8 volts DC Power Supply Applications

    ATO DC-DC buck converter can step down 24V/48V DC voltage to 13.8V. 13.8V DC power supply is mainly used in vehicle charging systems, communication equipment, emergency backup power supply and other fields. Here are some specific applications:

    • Car charging system: The vehicle's charging system usually converts AC power into 13.8V DC voltage, which is used to charge the vehicle battery. This voltage value is to ensure that the battery can maintain good condition when charging and not overcharge.
    • Communications equipment: Many radio communications equipment and radio stations require 13.8V DC power to operate. These devices include amateur radio stations and professional communications equipment, and using this standard voltage ensures stable operation of the equipment.
    • Backup power supply for electronic equipment: Some electronic equipment, such as radios, communication equipment and emergency lighting, often use 13.8V DC power supply as a backup power supply. Backup power ensures equipment remains operational in the event of a primary power failure, especially during emergencies.
    • Fire alarm: Some fire alarm systems may require a 13.8V DC power supply to ensure that the system can continue to work during a power outage or other emergency, providing continuous safety monitoring.
    • Ship and aircraft equipment: Some electronic equipment and communication equipment on ships and aircraft also use 13.8V DC power supply. These equipment include navigation systems, communication equipment and various control systems. Using this voltage can ensure the reliability and stability of the equipment.

    Tips: Can I use a DC to DC converter to charge a battery?

    Yes, you can use a DC to DC converter to charge a battery. DC to DC converters are devices that can convert one DC voltage level to another while maintaining the same power (approximately). When charging a battery, it's essential to match the converter's output voltage to the battery's voltage requirements. For example, if you have a 12-volt battery, you would use a DC to DC converter to step up or down the input voltage to 12 volts. However, it's crucial to consider factors like the battery chemistry (e.g., lead-acid, lithium-ion) and charging characteristics (constant current, constant voltage) to ensure safe and efficient charging. Additionally, incorporating proper battery management and charging circuitry is vital to prevent overcharging, undercharging, and ensure the battery's longevity and safety. So, while DC to DC converters can be part of a battery charging system, they should be used in conjunction with appropriate charging protocols and safeguards.

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