Released 2018
Warranty Period 5-year (Refer to Instruction Manuals)

This power supply is manufactured by SMD technology. The stress to P.C.B like twisting or bending causes the defect of the unit, please handle the unit with care
*Make sure necessary tests will be carried out on your end equipment with the power supply installed in accordance with any required EMC/EMI regulations.

Features of GMA300F-48

• High power density (25.7W/inch3)
• High efficiency 93% typ (Input Voltage 230V, Output Voltage 24V)
• For medical electric equipment
(ANSI/AAMI ES60601-1, EN60601-1 3rd, IEC60601-1-2 4th Ed.)
• Suitable for BF application (Output-FG : 1MOPP, Input-Output : 2MOPP)
• 2x4 standard footprint
• With AUX1 (12V 1A), AUX2 (5V 1A) (Option)
• With remote ON/OFF (Option)

Ordering Information and Options

GM(1)  A(2)  300(3)  F(4)  -  (5)  -  (6)  

(1) Series name
(2) Single output
(3) Output wattage
(4) Universal input
(5) Output voltage
(6) Optional
C : with Coating
J1 : VH connector type (J.S.T.)
J3 : Horizontal input connector
       VH connector type (J.S.T.)
R3 : with Sub features (5VAUX, 12VAUX, Remote)

Specification is changed at option, refer to Instruction manual (4 Option and Others).

Recommended EMI Filters


Contents Specifications
Input Voltage AC85 - 264V 1Φ *
Output Wattage 302.4W
Voltage/Current 48V 6.3A
Adjustable  Voltage Range 45.60 - 52.80V
Protection Circuit And Others Overcurrent Protection Works over 105% of rating and recovers automatically
Overvoltage Protection 55.20 - 67.20V
Remote ON/OFF Optional
Remote Sensing -
Others -
Operating Temperature/Humidity -20 to +70℃, 20 - 90%RH (Non condensing) *
Safety And Noise Regulations Agency Approvals (At only AC input) UL62368-1, ANSI/AAMI ES60601-1, C-UL, EN62368-1, EN60601-1 3rd,
Complies with IEC60601-1-2 4th Ed.
Conducted Noise Complies with FCC-B, VCCI-B, CISPR32-B, EN55011-B, EN55032-B
High Attenuation Complies with IEC61000-3-2 (class A) *
Others Dimensions (WxHxD) 50.8x37x101.6mm [2.0x1.5x4.0 inches]
Weight 230g max
Cooling Method Forced air (Require external fan) *
Warranty Period 5-year (Refer to Instruction Manuals)
  • * For further information and how to use, please see in Cosel product catalog.

Block Diagram

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-18 Mating harness for input of the connector type power supply with J option. -
H-IN-24 Mating harness for input of the connector type power supply. -
H-SN-18 Harness for using AUX(12V). -
H-SN-38 Harness for using all functions. -
H-SN-79 Harness for using all functions. (AWG24 for 1A) -
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.