Medical AC-DC Adapter
24V 250W / MEA-250A24C□
TECHNICAL DATASHEET
All parameters are specified at 25°C ambient for all products unless otherwise indicated.
www.DeltaPSU.com (April 2019, Rev. 05)
1
MEA-250A24C□
Highlights & Features
•Meet Efficiency Level VI
•Safety Approvals to IEC 60601-1 3.1 Ed. & IEC 60950-1
•Compliant with IEC 60601-1-2 3th and 4th Ed. Requirements
•IP22 ingress protection rating
•2 × MOPP isolation
•Suited for Type BF Medical Products
Safety Standards
CB Certified for worldwide use
Model Number: MEA-250A24C□
Unit Weight: 1.05kg (37.0 ounces)
Dimensions (W × L × H): 100.0 × 200.0 × 43.0 mm
3.94 × 7.88 × 1.70 inch
General Description
The MEA-250A24C medical AC-DC desktop type adapter comes with universal AC input voltage range at 90Vac to 264Vac. The
24Vdc/10.42A output adapter complies to the latest IEC/EN 60601-1-2 4th edition requirements. It is certified for EMC standards
according to EN 55011 for industrial, scientific and medical (ISM) radio-frequency equipment and EN 55032 for Information Technology
Equipment (ITE) radio-frequency equipment. MEA-250A24C also has both medical and ITE safety approvals including UL/cUL and
IEC 60950-1, CB certification and CCC approval. Designs are fully compliant with RoHS Directive 2011/65/EU for environmental
protection.
Model Information
Medical AC-DC Adapter
Model
Number
Input Voltage Range
Rated Output Voltage
Rated Output Curr
ent
MEA-250A24C H-A
90-264Vac
24Vdc
10.42A
Model Numbering
MEA –
250
A
24
C
H-
A
Delta Medical
Desktop Adapter
Max wattage in the
product series (may be
lower at some voltage)
Family
Code
Output Voltage
(Single Output)
24 – 24V
Input Connector
Type
C – C14
Plug Type: 6 pins mini-fit
Cable Length: 1.5m
Delta Standard
Medical AC-DC Adapter
24V 250W / MEA-250A24C□
TECHNICAL DATASHEET
All parameters are specified at 25°C ambient for all products unless otherwise indicated.
www.DeltaPSU.com (April 2019, Rev. 05)
2
Specifications
Input Ratings / Characteristics
Nominal Input Voltage 100-240Vac
Input Voltage Range 90-264Vac
Nominal Input Frequency 50-60Hz
Input Frequency Range 47-63Hz
Input Current (max.) 4A @ 115Vac, 2A @ 230Vac
Average Efficiency (typ.) 90%, Reference Fig. 1
Standby Power (max.)
0.3W @ 115Vac & 230Vac
Inrush Current (typ.) 50A @ 115Vac and 100A @ 230Vac
Touch Current (max.) 0.1mA @ 264Vac NC1), 0.3mA @ 264Vac SFC2)
Earth Leakage Current (max.) 0.2mA @ 264Vac NC1), 0.5mA @ 264Vac SFC2)
1) NC: Normal condition
2) SFC: Single fault condition
Fig. 1 Efficiency versus Output load
Medical AC-DC Adapter
24V 250W / MEA-250A24C□
TECHNICAL DATASHEET
All parameters are specified at 25°C ambient for all products unless otherwise indicated.
www.DeltaPSU.com (April 2019, Rev. 05)
3
Output Ratings / Characteristics
Nominal Output Voltage 24Vdc
Output Total Regulation ± 5%
Output Current 10.42A
Output Power 250W
Line Regulation ±
0.5%
Load Regulation ±
4.5%
Ripple & Noise (max.)
240mVpk-pk @ Rated load
Start-up Time (max
.
) 3000ms @ 115Vac
Hold-up Time (min
.
) 10ms @ 100Vac
Dynamic Response
(Overshoot & Undershoot O/P Voltage)
± 10% @ 0-50% & 50-100% load;
Slew rate 0.25A/µs (@ 100Hz, 50% Duty Cycle)
Ripple & Noise measurement circuit with 20MHz BW
Mechanical
Case PC
Dimensions (W × L × H) 100.0 × 200.0 × 43.0 mm (3.94 × 7.88 × 1.70 inch)
Unit Weight 1.05kg (37.0 ounces)
Cable Length 1500mm
Indicator YES
Cooling System NA
Terminal Input IEC 60320 C14 socket
Output MOLEX 39-01-2060
0.47uF Ceramic
10uF Electrolytic
PSU Load
Test Fixture
5cm Scope
Medical AC-DC Adapter
24V 250W / MEA-250A24C□
TECHNICAL DATASHEET
All parameters are specified at 25°C ambient for all products unless otherwise indicated.
www.DeltaPSU.com (April 2019, Rev. 05)
4
Environment
Surrounding Air Temperature
Operating
5°C to +60°C
Storage
-40°C to +70°C
Power De-rating
> 40°C de-rate power by 2.5% / °C
Operating Humidity
5-95% RH (Non-Condensing)
Operating Altitude 5,000 meters (16,400 feet)
Shock Test Non-Operating 50G, 11ms, 3 shocks for each direction
Vibration Non-Operating 5-500Hz, 2.09Grms, 20 minute for each three axis
Power De-rating Curve
Protections
Overvoltage (max.) 120%, Latch Mode
Overload / Overcurrent (max.) 200% of rated load current, Hiccup Mode,
(Non-Latching, Auto-Recovery)
Over Temperature Hiccup Mode,
(Non-Latching, Auto-Recovery)
Short Circuit Hiccup Mode,
(Non-Latching, Auto-Recovery)
Degree of Protection IP22
Protection Against Shock Class I
Reliability Data
MTBF (typ.) 500K Hours based on Telecordia SR-332 (at 115Vac, Max. load
and 25°C Ambient)
Expected Cap Life Time1)
5 Years (115Vac & 230Vac, 100% load @ 25°C)
1) Estimated lifetime when 8 hours operating a day.
Medical AC-DC Adapter
24V 250W / MEA-250A24C□
TECHNICAL DATASHEET
All parameters are specified at 25°C ambient for all products unless otherwise indicated.
www.DeltaPSU.com (April 2019, Rev. 05)
5
Safety Standards / Directives
Medical Safety IEC 60601-1 3.1 edition CB report
EN 60601-1
CAN/CSA-C22.2 NO. 60601-1:14,
ANSI/AAMI ES60601-1
UL60601-1 (File No. E356265)
ITE Safety IEC60950-1 (Ed.2,2005), GB4943.1-2011, GB9254-2008,
GB17625.1-2012, J60950-1(H29)
CE MDD Directive 93/42/EEC
Material and Parts RoHS Directive 2011/65/EU Compliant
Galvanic Isolation Input to Output (2XMOPP) 4000Vac
Input to PE (1XMOPP) 1500Vac
Output to PE (1XMOPP)
1500Vac (Type BF application rated)
EMC (Compliant with IEC 60601-1-2 4th Ed. Requirements)
EMC / Emissions
EN55011/EN55032, FCC Title 47: Class B
Harmonic Current Emissions IEC61000-3-2 Meet Class A and Class D limit
Immunity
to
Voltage Flicker IEC61000-3-3
Electrostatic Discharge IEC61000-4-2 Level 4 Criteria A1)
Air Discharge: 15kV
Contact Discharge: 8kV
Radiated Field IEC61000-4-3
Criteria A1)
80MHz-2700MHz, 10V/m AM modulation
385MHz-5785MHz, 28V/m Pulse mode and other modulation
Electrical Fast Transient / Burst
IEC61000-4-4 Level 3 Criteria A1): 2kV
Surge IEC61000-4-5 Level 3 Criteria A1)
Common Mode3): 2kV
Differential Mode4): 1kV
Conducted IEC61000-4-6
Level 2 Criteria A1)
150kHz-80MHz, 3Vrms, 6Vrms at ISM bands and
Amateur radio bands
Power Frequency Magnetic
Fields
IEC61000-4-8 Criteria A1)
Magnetic field strength 30A/m
Voltage Dips IEC61000-4-11
Criteria A1)
0% UT, 0.5 cycle (10ms),
0o/45o/90o/135o/180o/225o/270o/315o/360o
Criteria A1)
0% UT, 1 cycle (20ms), 0o
Criteria B2)
70% UT, 25 cycle (500ms), 0o
Criteria B2)
0% U
T
, 250 cycle (5000ms), 0
o
1) Criteria A: Normal performance within the specification limits
2) Criteria B: Output out of regulation, or shuts down during test. Automatically restore to normal operation after test.
3) Asymmetrical: Common mode (Line to earth)
4) Symmetrical: Differential mode (Line to line)
Medical AC-DC Adapter
24V 250W / MEA-250A24C□
TECHNICAL DATASHEET
All parameters are specified at 25°C ambient for all products unless otherwise indicated.
www.DeltaPSU.com (April 2019, Rev. 05)
6
Block Diagram
Dimensions
W × L × H: 100.0 × 200.0 × 43.0 mm
Note: The plug’s polarity is as following.
DC PLUG: MOLEX, 39-01-2060
DIN PLUG
POLARITY
P1
V+
P2
V+
P3
V+
P4
RTN
P5
RTN
P6
RTN
MATING CONNECTOR
1. PCB MOUNT TYPE
MOLEX, 39-29-1067 (5569 SERIES)
2. WIRE CONNECTOR TYPE
HOUSING: MOLEX, 39-01-3069 (5559 SERIES)
TERMINAL: MOLEX 5558 SERIES
Medical AC-DC Adapter
24V 250W / MEA-250A24C□
TECHNICAL DATASHEET
All parameters are specified at 25°C ambient for all products unless otherwise indicated.
www.DeltaPSU.com (April 2019, Rev. 05)
7
Functions
Start-up Time
The time required for the output voltage (Vo) to reach 90% of its set value, after the input AC voltage is applied.
Rise Time
The time required for the output voltage (Vo) to change from 10% to 90% of its steady state value.
Hold-up Time
Hold up time is the time when the AC input collapses and output voltage retains regulation for a certain period of time. The time required
for the output to reach 95% of its set value, after the input voltage is removed.
Graph illustrating the Start-up Time, Rise Time, and Hold-up Time
Inrush Current
Inrush current is the input current that occurs when the input
voltage is first applied. For AC input voltages, the maximum peak
value of inrush current will occur during the first half cycle of the
applied AC voltage. This peak value decreases exponentially
during subsequent cycles of AC voltage.
Dynamic Response
The power supply output voltage will remain within ±10% of its
steady state value, when subjected to a dynamic load change from
0% to 50% or 50% to 100% of its rated current.
Medical AC-DC Adapter
24V 250W / MEA-250A24C□
TECHNICAL DATASHEET
All parameters are specified at 25°C ambient for all products unless otherwise indicated.
www.DeltaPSU.com (April 2019, Rev. 05)
8
Overload & Over current Protections
The power supply’s Overload (OLP) and Over current (OCP)
Protections will be activated when output current (IO) is about 105%
- 200%. Upon such an occurrence, VO will start to drop. Once the
power supply has reached its maximum power limit, the protection
will be activated and the power supply will go into “Hiccup mode”
(Auto-Recovery). The power supply will recover once the fault
condition causing the OLP and OCP is removed and IO is back
within the specified limit.
Short Circuit Protection (Auto-Recovery)
The power supply’s output OLP/OCP function also provides
protection against short circuits. When a short circuit is applied, the
output current will operate in “Hiccup mode”, as shown in the
illustration in the OLP/OCP section on this page. The power supply
will return to normal operation after the short circuit is removed.
Overvoltage Protection
The power supply’s overvoltage circuit will be activated when its
internal feedback circuit fails. The output voltage shall not exceed
its specifications defined under “Protections”. Power supply will
latch off, and require removal/re-application of input AC voltage in
order to restart.
Over Temperature Protection
As mentioned above, the power supply also has Over Temperature
Protection (OTP). This is activated when the overload condition
persists for an extended duration and the output current is below
the overload trigger point but >100% load. In the event of a higher
operating condition at 100% load, the power supply will run into
OTP when the surrounding air temperature is higher than the
operating temperature. When activated, the output voltage will go
into hiccup mode until the input voltage is removed; then, reapplied,
and the surrounding air temperature drops to its normal operating
temperature.
Medical AC-DC Adapter
24V 250W / MEA-250A24C□
TECHNICAL DATASHEET
All parameters are specified at 25°C ambient for all products unless otherwise indicated.
www.DeltaPSU.com (April 2019, Rev. 05)
9
Certificate
All Delta Medical Power products conform to the European directive 2011/65/EU.
RoHS is the abbreviation for “Restriction of the use of certain hazardous substances.
Delta has been certified as meeting the requirement of ISO 13485: 2003 and EN ISO 13485:2012 for the design and
manufacture of switching power supply and adapter for medical device.
Delta is approved for the UL Total Certification Program (TCP) approved client laboratory for IEC62368-1. Delta also
has participated UL Client Test Data Program (CTDP) for IEC 60601.
Energy star level VI compliance
Attention
Delta provides all information in the datasheets on an “AS IS” basis and does not offer any kind of warranty through the information for
using the product. In the event of any discrepancy between the information in the catalog and datasheets, the datasheets shall prevail
(please refer to www.DeltaPSU.com for the latest datasheets information). Delta shall have no liability of indemnification for any claim or
action arising from any error for the provided information in the datasheets. Customer shall take its responsibility for evaluation of using
the product before placing an order with Delta.
Delta reserves the right to make changes to the information described in the datasheets without notice.