4731 AC/DC Power Adapter with Universal Inputs


The 4731 is a power adapter manufactured by Mean Well that takes universal inputs (90 to 264 Vac, 47 to 63 Hz) and outputs 24 Vdc at 1.5 A. It float charges the sealed rechargeable batteries of the ET107 weather station via ac power. It can also be used with some retired weather stations such as the ET106, W2000, NW8000 series, and 010 series. The 4731 is included in the 10522 ac-power kit for ET stations.



-NOTE- Additional specifications are listed in the 4731 Specifications Sheet. This information is provided by Mean Well.
Dimensions 14.8 x 4.0 x 3.0 cm (5.8 x 1.6 x 1.2 in.)


DC Voltage 24 V
Rated Current 1.5 A
Current Range 0 to 1.5 A
Rated Power 36 W
Ripple & Noise 150 mVp-p (measured at 20 MHz of bandwidth by using a 12-in. twisted pair-wire terminated with a 0.1uf and 47uf parallel capacitor)
Voltage Tolerance ±5.0% (includes setup tolerance, line regulation, and load regulation)
Line Regulation ±1.0%
Load Regulation ±2.0%


Voltage Range 90 to 264 Vac, 127 to 370 Vdc
Frequency Range 47 to 63 Hz
Efficiency 85% (typical)
AC Current
  • 1.1 A (@ 115 Vac) typical
  • 0.7 A (@ 230 Vac) typical


Overload 110 to 150% rated output power
Overload Protection Type Hiccup mode (Recovers automatically after fault condition is removed.)
Overvoltage 27.6 to 32.4 V
Overvoltage Protection Type Shut down o/p voltage, re-power on to recover


Operating Temperature -30° to +75°C
Operating Humidity 20 to 90% RH (non-condensing)
Temperature Coefficient ±0.03%/°C (0° to 50°C)
Vibration 10 to 500 Hz, 2G 10 min./1 cycle (period for 60 min. each along X, Y, Z axes)

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Replacement Part for the following products:

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