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    Picture of 12V 20A 240W SMPS Switching Power Supply
    Picture of 12V 20A 240W SMPS Switching Power Supply
    Picture of 12V 20A 240W SMPS Switching Power Supply
    Picture of 12V 20A 240W SMPS Switching Power Supply

    12V 20A 240W SMPS Switching Power Supply

    1 review(s) | Add your review
    SKU: PH-SMPS-250-12
    $70.08
    ● Provides dependable 240W power, ensuring steady energy supply for all your connected devices. ● Built with premium hardware to ensure reliable, long-lasting operation. ● Features integrated short-circuit, overload and overvoltage safeguards for safe operation. ● Backed by CE, FCC, and RoHS certifications, delivering trusted, environmentally responsible performance for worldwide use.
    🚚 Free shipping
    ⏱️ Delivery: 6-12 days
    🔙 30-day Returns
    Overview

    Powerhome 240W switching power supply reliably converts AC to 12V DC (20A rated), featuring robust short-circuit, overload and overvoltage protection. Built with premium components like pure copper transformers and EMC anti-interference circuits, it combines outstanding quality with an attractive price, making it the ideal choice for power tools, household appliances, office devices and industrial control systems.

    250W SMPS Switching Power Supply Feature

    Feature

    • Safe Wiring Design: Equipped with a wiring safety cover to prevent accidental contact and short circuits, enhancing operational safety.
    • EMC Anti-interference Circuit: Built-in EMC anti-interference circuit to effectively suppress electromagnetic interference and ensure stable operation.
    • High-capacity Capacitors: Equipped with high-capacity Lingbo capacitors for excellent filtering, ensuring smoother and purer output voltage.
     

    Details

    1. Indicator light
    2. Voltage regulation
    3. Output positive terminal:
    4. Output negative terminal
    5. Ground wire
    6. Input 220V
    12V 20A 240W SMPS Switching Power Supply Details

    Dimension (Unit: mm)

    12V 20A 240W SMPS Switching Power Supply Dimension

    12V 20A 240W SMPS Switching Power Supply Mounting Dimension

    Specs
    Model PH-S-250-12
    Output DC Voltage 12V
    Rated Current 20A
    Current Range 0 ~ 20A
    Rated Power 240W
    Ripple & Noise (Max.)(Note 2) 150mVp-p
    Voltage Adjust Range 10 ~ 13.2V
    Voltage Tolerance (Note 3) ±1.0%
    Line Regulation ±0.5%
    Load Regulation ±0.5%
    Setup, Rise, Holdup Time 200ms, 100ms, 20ms at full load
    Input Voltage Range 90 ~ 132VAC/180V~264VAC (selected by a switch) or 254 ~ 370VDC
    Frequency Range 47~63Hz
    Efficiency (Typ.) 80%
    AC Current (Typ.) 4.9A/115V AC 2.8A/230V AC 
    Inrush Current (Typ.) Cold start: 50A/230V AC 
    Leakage Current <3.5mA/240V AC 
    Protection Overload 105~135% rated output power
    Protection type: Constant current limiting, recovers automatically after fault condition is removed.
    Overvoltage 13.8 ~ 16.2V
    Protection type: Hiccup mode, recovers automatically after fault condition is removed.
    Environment Working Temperature -10 ~ +50℃
    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 Safety Standards UL60950-1 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
    Others MTBF ≥271.9K hrs MIN. MIL-HDBK-217F (25℃)
    Dimension 215*115*50mm (L*W*H)
    Weight 0.95kg
    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.
    Application
    Outdoor Monitoring

    Outdoor Monitoring

    LED Strip

    LED Strip

    Automation Equipment

    Automation Equipment

    Road Sign Light

    Road Sign Light

    FAQ

    Q1: What is the difference between a switching power supply and a linear power supply?

    A switching power supply (SMPS) uses alternating MOS transistor switching to store and release energy via coils and capacitors, enabling efficient operation. A linear power supply has no switching function, runs continuously, produces large amounts of heat, and has low conversion efficiency, which shortens component life.

    Q2: Can this SMPS work with universal input voltage?

    Absolutely. This SMPS is designed with a full-range universal AC input, making it highly compatible with global power systems. It automatically adjusts to different input voltages, delivering stable 24V DC output regardless of location or power fluctuation.

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    1 review(s)
    5.0 1
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    Finnian | 9/15/2026 1:20 AM
    Reliable 12V 20A Power Supply
    I’m using this PH-SMPS-250-12 for industrial equipment, and it’s been running smoothly. The 12V 20A output stays stable, while the short-circuit and overload protection add useful peace of mind. Wiring is easy, the fan is quiet, and the EMC performance has been good in my setup. CE, FCC, and RoHS certifications are a nice plus.
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