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    Picture of 12V 4A 50W SMPS Switching Power Supply
    Picture of 12V 4A 50W SMPS Switching Power Supply
    Picture of 12V 4A 50W SMPS Switching Power Supply
    Picture of 12V 4A 50W SMPS Switching Power Supply

    12V 4A 50W SMPS Switching Power Supply

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    SKU: PH-SMPS-50-12
    $54.15
    ● Provides steady 50W 12V power to ensure consistent, dependable device operation. ● Passive free-air convection keeps the unit cool without noisy fans. ● 100% full-load burn-in tested for enhanced long-term reliability. ● Ideal for LED strips, computers, printers, security camera systems, and factory automation controllers.
    🚚 Free shipping
    ⏱️ Delivery: 6-12 days
    🔙 30-day Returns
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    Overview

    50W 12V switching DC power supply delivers reliable performance at an affordable price, featuring universal AC input compatibility and a stable 4.2A rated output. Built with short-circuit and overload protection for enhanced safety and durability, it is the ideal economical choice for powering office electronics, household appliances, and industrial equipment alike.

    Switching DC Power Supply Feature

    Feature

    • Global Compatibility: Full-range 110V/220V AC input enables seamless operation across regions, no voltage adjustment needed.
    • Multi-layer Safety: Built-in short-circuit, overload, and overvoltage protection to shield both the unit and your equipment.
    • Budget-friendly Performance: High-quality build at an accessible price, ideal for cost-conscious office, home, and industrial use.
     

    Details

    1. Input 220V: Accepts 220V AC input to power the unit.
    2. Ground Wire: Provides safety grounding to prevent electric shock.
    3. Output Negative Terminal: Connects to the negative side of your load.
    4. Output Positive Terminal: Connects to the positive side of your load.
    5. Indicator Light: Displays the power supply’s working status at a glance.
    6. Voltage Regulation: Allows for adjustment of the output voltage level.
    50W Switching DC Power Supply Details

    Dimension (Unit: mm)

    50W Switching DC Power Supply Dimension

    Switching DC Power Supply Terminal Pin Number Difinitions

    Block Diagram

    Switching DC Power Supply Block Diagram

    Specs
    Model PH-S-50-12
    Output DC Voltage 12V
    Rated Current 4.2A
    Current Range 0 ~ 10A
    Rated Power 50.4W
    Ripple & Noise (Max.)(Note 2) 100mVp-p
    Voltage Adjust Range 10.8 ~ 13.2V
    Voltage Tolerance (Note 3) ±1.0%
    Line Regulation ±0.5%
    Load Regulation ±0.5%
    Setup, Rise, Holdup Time 200ms, 100ms, 30ms
    Input Voltage Range 85 ~ 132VAC/170V~260VAC (selected by a switch) or 240 ~ 370V DC
    Frequency Range 47~63Hz
    Efficiency (Typ.) 78%
    AC Current (Typ.) 1.3A/115V AC     0.65A/230V AC
    Inrush Current (Typ.) Cold start: 18A/115V AC     36A/230V AC
    Leakage Current <1mA/240V AC
    Protection Overload 105~150% rated output power
    Protection type: Hiccup mode, recovers automatically after fault condition is removed.
    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 Part15 Jconduction Class B
    Others MTBF ≥408.3K hrs MIN. MIL-HDBK-217F (25℃)
    Dimension 159*97*38mm (L*W*H)
    Weight 0.51kg
    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.
    Application
    Household Appliances

    Household Appliances

    Factory Equipment

    Factory Equipment

    Monitoring Equipment

    Monitoring Equipment

    Power Tools

    Power Tools

    FAQ

    Q1: What are the types of switching power supply (SMPS)?

    Switching power supplies (SMPS) are mainly classified into DC and AC types. DC SMPS are based on DC/DC converters, which are split into isolated and non-isolated types depending on whether input and output are electrically isolated. AC/DC converters transform AC to DC with bidirectional power flow—forward for rectification and reverse for active inversion. They can be categorized by circuit structure (half-wave or full-wave), phase number (single-phase, three-phase, or multi-phase), and operating quadrant (one to four quadrants).

    Q2: What is the difference between DC and AC SMPS?

    DC switching power supplies operate with DC input and rely on DC/DC conversion technology, while AC switching power supplies take AC input and perform AC/DC conversion. DC SMPS are mainly categorized by whether their DC/DC converters are isolated or non-isolated, whereas AC/DC converters feature bidirectional power flow and can be classified by circuit structure, phase number, and operating quadrant.

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