Mean Well LRS-350-12 12V DC 348W Enclosed Switching Power Supply
Mean Well LRS-350-12 enclosed switching power supply, 12V DC at 29A, 348W rated output. 85-264V AC input (230V ready), fan-cooled or passively cooled metal chassis with screw terminal connections.
The Mean Well LRS-350-12 is a single-output enclosed switching power supply from the LRS family, giving a regulated 12V DC output at up to 29A (348W rated) from a single-phase AC supply. The LRS range is built for industrial and machine-tool duty: a steel chassis with a perforated top cover, a protected screw terminal block for both AC input and DC output, and a green power LED plus an output-voltage adjust trimmer on the board.
About the photograph: the image is a representative image of the Mean Well LRS-350 series. The unit pictured is the LRS-350-24 - it shows the correct chassis, casework, terminals and physical size for the LRS-350-12, but it is not the exact output variant supplied with this order. The unit you receive is the LRS-350-12 specified in the table below. Please confirm the variant you need against the specification table above and in the Part Number field, not against the label in the photograph.
It is a general-purpose auxiliary supply of the type used to power contactor coils, solenoid valves, encoders, relay banks, coolant pumps, door interlocks and small motors on machine tools, and it suits general control-panel and automation work. The low-profile 30mm chassis mounts directly to a panel or bracket.
AC input selector switch: this model has a slide switch on the case that must be set to 230V before connecting a UK 230V supply. Check the switch position at every power-on.
Specifications
- Model: LRS-350-12
- Series: Mean Well LRS single-output enclosed switching power supply
- Output voltage: 12V DC
- Rated output current: 29A
- Rated output power: 348W
- Efficiency (typical): 85%
- AC input range: 90 - 132 VAC / 180 - 264 VAC by switch, 240 - 370 VDC (switch on 230 VAC)
- Frequency range: 47 - 63 Hz
- Cooling method: Forced air (built-in fan, top grille)
- Dimensions (L x W x H): 215 x 115 x 30 mm
- Enclosure: Steel, perforated top cover
- Output terminals: Screw terminal (-V, +V)
- Input terminals: Screw terminal (L, N, ground)
- Protections: Overload (hiccup mode, auto-recovery), over-voltage, short circuit, over-temperature
- Overload protection: 110 - 140% of rated power
- Indicator: Green power LED
- Adjustment: Output voltage trimmer on the PCB (+V ADJ)
- Operating temperature: -25 to +70 °C (derating from 50°C)
- Altitude: Up to 5000 m
Safety approvals: UL62368-1, IEC62368-1, EN62368-1 (LRS-100 / 150 / 200 / 350 family, per series datasheet).
Before you order
- Match the voltage. This is a fixed 12V output unit - the voltage is not adjustable across ranges, only trimmed a few percent around nominal.
- Size on current, not watts. The rated power figure differs slightly between voltages within a series (the 348W here is the manufacturer's rating for this variant). Check the current against your actual load.
- Allow headroom. Running continuously near 100% of rating shortens component life; a supply sized 20-30% above the running load is better practice.
- Fit in a controlled enclosure. The unit is an open-frame style component intended for installation inside a machine or control cabinet, not for standalone use in a damp or dusty area.
- Earth the chassis. Connect the ground terminal to protective earth before applying power.
Supplied as a new unit. Full specification is taken from the official Mean Well LRS-350 series datasheet.
