Discontinued (November, 2022)

Released 1997
Warranty Period 2-year

This power supply is manufactured by SMD technology. The stress to P.C.B like twisting or bending causes the defect of the unit, so handle the unit with care.

Recommended Model for Replacement

Type Product Name Released Catalog
Instruction Manuals
Documents for replacement
Open Frame type LHP300F-30-Y 2021
  • Catalog
  • Instruction Manuals
    • * For further information and how to use, please see in Cosel product catalog.

    Features of LDA300W-30

    • Rugged PCB type (CEM3)
    • Input range
    LDA10 - 75F (AC85 - 264V)
    LDA100 - 300W (AC85 - 132V/AC170 - 264V)
    Autoranging input
    • Built-in inrush current limiting, overcurrent and overvoltage protection circuits

    Ordering Information and Options

    LDA(1)  300(2)  W(3)  -  5(4)  -  (5)  

    (1) Series name
    (2) Output wattage
    (3) Autoranging input
    (4) Output voltage
    (5) Optional *
      C: with Coating
      G: Low leakage current
      L: with LED
      R: with Remote ON/OFF
      S: with Chassis
      SNF: with Chassis & cover & fan
      T: Vertical terminal block
    *Please contact us about safety approvals for the model with option.

    Recommended EMI Filters


    Contents Specifications
    Input Voltage AC85 - 132V/170 - 264V 1Φ
    Output Wattage 300W
    Voltage/Current 30V 10A
    Adjustable  Voltage Range 5, 9, 12, 15, 18, 24, 30, 48V ±10%
    Protection Circuit And Others Overcurrent Protection Works over 105% of rating and recovers automatically
    Overvoltage Protection Works at 115 - 140% of rating
    Remote ON/OFF Option (Refer to Instruction Manual)
    Remote Sensing Provided
    Others -
    Operating Temperature/Humidity -10 to +70℃, 20 - 90%RH (Non condensing) *
    Safety And Noise Regulations Agency Approvals (At only AC input) UL60950-1, C-UL, EN62368-1
    Complies with DEN-AN and IEC60950-1
    Conducted Noise Complies with FCC-B, CISPR22-B, EN55022-B, VCCI-B
    High Attenuation -
    Others Dimensions (WxHxD) 108x50x255mm (without terminal block)
    Weight 1kg max
    Cooling Method Convection/Forced air (Refer to DERATING CURVE)
    Warranty Period 2-year
    • * For further information and how to use, please see in Cosel product catalog.

    Documents Download

    Technical Data
    • * For another documents aren't listed, please feel free to contact to a Cosel representative.

    Optional Parts


    Category Part Number Description PDF DXF
    H-IN-7 Mating harness for input with J option. (Mfr : Tyco Electronics) -
    H-OU-22 Mating harness for output with J option. (Mfr : Tyco Electronics) -
    H-RC-1 Harness for using option : -R. -
    Table1 Product Status Information
    No. Product Status Definition
    1 New Product New Product. Recommended for new design.
    2 Recommended Recommended for new design.
    3 blank Product in mass production
    4 NRND Not recommended for new design.
    5 To be discontinued PDN (Product Discontinuation Notice) is issued and LTB (Last Time Buy) is under consideration.
    6 Discontinued LTB order is no longer available.