LPT40 Series

40—55 Watt AC-DC Power Supplies

The LPT40 series of open-frame AC-DC power supplies comprises seven triple output models, covering a variety of standard voltages from -15 V to 24 Vdc. Each model accepts a universal input of 85—264 Vac or 120—300 Vdc. These compact switch-mode power supplies feature main output overvoltage protection and remote sense, with short-circuit protection on all outputs. Depending on the model, they provide up to 40 watts of output power with free air convection cooling and up to 55 watts with 30 CFM of forced air. Less than 1U high, LPT40 series power supplies are suitable for a variety of uses including test and measurement, single-board computers, telecommunications and networking.

Datasheet Technical Documentation Print this page
  • Total Max Power:
    55 W
  • Total Max Current:
    8 A
  • Input Voltage:
    85 V to 264 V
  • Output Voltage:
    -15 V to 24 V
  • Outputs:
  • Size (L x W x H):
    5.000" x 3.000" x 1.200"
  • Warranty:
    2 years
  • Operating Temperature:
    -20°C to +70°C

Electrical Specifications

  • Input
  • Output
  • Input current: 1 A max. (RMS) @ 115 Vac
  • Inrush current: < 18 A peak @ 115 Vac; < 36 A peak @ 230 Vac
  • EMI filter: FCC Class B conducted; CISPR 22 Class B conducted
  • Efficiency: 70% typical at full load (60% for LPT41)
  • Safety ground leakage current: < 0.5 mA @ 50/60 Hz, 264 Vac input
  • Frequency: 47 - 440 Hz
  • Input range: 85 - 264 Vac, 120 - 300 Vdc
  • Cross regulation: ± 2% on output 1; ± 5% on outputs 2, 3
  • Hold-up time: 20 ms @ 40 W load, 115 Vac nominal line
  • Remote sense: Compensates for 0.5 V lead drop min.
  • Adjustment range: -5, +10% minimum
  • Maximum power: 40 W for convection, (LPT41, 25 W); 55 W w/ 30 CFM
  • Overload protection: Short circuit protection and case overload
  • Overvoltage protection: 5.7 to 6.7 Vdc on main output LPT41: 3.6 to 4.6 V
  • LPX40 enclosure kit available
  • Universal input
  • 3" x 5" footprint
  • Remote sense on main output
  • Built-in EMI filter
  • Low output ripple
  • Adjustable main output
  • Overvoltage protection
  • 110 KHz switching frequency
  • Terminal block option (-T)
  • Less than 1U high
  • Overload protection

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