AC/DC Power Supplies

Delta Electronics MEB-750A Series Medical / Industrial AC/DC Power Supply

The Delta Electronics MEB-750A series are enclosed AC/DC power supplies designed for medical and industrial applications requiring high-density, high-power output with a dedicated 5 V / 2 A standby rail. Available in 12 Vdc, 24 Vdc and 48 Vdc output configurations, the series delivers up to 750 W continuous power (700 W for 12 V models) and up t...

Two inlet options are available: C14 inlet (B models, 85 Vac fixed input) and American barrier strip terminal (T models, 90–264 Vac universal input). T models maintain full-rated output across the full universal input range.

The MEB-750A series features 2 × MOPP galvanic isolation and is rated for Type BF medical product applications. Additional features include conformal coating, current sharing for parallel operation, remote on/off control with power good signal output, remote sense compensation of up to 500 mV, voltage trimming, and IEC 60601-1-2 4th Edition immunity compliance. The series meets Class B conducted and radiated EMI requirements and includes a built-in cooling fan.

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Features

Input voltage range: 85-264Vac nominal operation.
Output voltage: main 24Vdc output with 5V / 2A standby output.
Output current: main output 0-31.25A, standby output 2A.
Output power: 750W maximum.
Efficiency: 92% typ. at 115Vac and 94% typ. at 230Vac for the 24V model.
2 x MOPP isolation and suited for Type BF medical products.
Current sharing supported.
Conformal coating.
Remote on/off, power good and remote sense supported.
Voltage trimming ±10% of rated output.
Built-in fan cooling.
Class B conducted and radiated EMI performance.

Specifications

INPUT RATINGS/CHARACTERISTICS
Nominal Input Voltage		100-240 Vac
Input Voltage Range		85-264 Vac
Nominal Input Frequency		50-60 Hz
Input Frequency Range		47-63 Hz
Input Current (max)		9 A
Full load Efficiency (typ.) (Exclude fan power)	For 12 V output Model For 24 V output Model For 48 V output Model	88% @ 115 Vac / 60 Hz 90.5% @ 230 Vac / 50 Hz, Reference Fig. 1 92% @ 115 Vac / 60 Hz 94% @ 230 Vac / 50 Hz Reference Fig. 2 91.5% @ 115 Vac / 60 Hz 94% @ 230 Vac / 50 Hz Reference Fig. 3
Inrush Current (max)		40 A @ 264 Vac, cold start
Input-PE (protective earth) leakage current (typ.)		0.3 mA @ NC, 1 mA @ SFC¹
Output-PE (protective earth) leakage current for Type BF application (max)		0.1 mA @ NC, 0.5 mA @ SFC¹
Power Factor (min)		0.95 @ 115 V / 50 Hz, 230 V / 50 Hz, full load
1. NC: normal condition, SFC: single fault condition

LEAKAGE CURRENT
Input-PE Leakage Current	100 Vac/60 Hz(Typ)	264 Vac/60 Hz(Typ)	Delta Limit	IEC60601-1 Limit
Normal Condition	108.5 uA	289.3 uA	300 uA max	5000 uA max
Single Fault Condition	211.4 uA	561.3 uA	1000 uA max	10000 uA max
Output-PE Leakage Current for Type BF application	-
Normal Condition	34 uA	89 uA	100 uA max	100 uA max
Single Fault Condition	70 uA	185 uA	500 uA max	500 uA max

OUTPUT RATINGS/CHARACTERISTICS
Total Regulation		± 3%
Output Power (max)	For 12 V output Model For 24 V/ 48 V output Model For 48 V output Model	700 W 750 W 1200 W peak for 0.5 sec, 0-25 A, Slew rate 0.1 A/ms, above 100 Vac
Line Regulation (max)		1%
Load Regulation (max)		2%
Ripple & Noise (typ.)		1% pk-pk Vrated@ rated load, Reference Fig. 4
Voltage Trimming Range	For 12 V output Model For 24 V/ 48 V output Model	12-14V ± 10% Vrated
Dynamic Response (Overshoot & Undershoot O/P Voltage)		± 5% @ with 50% load change
Start-up Time (max)		2000 ms with AC turn on
Hold-up Time (min)		12 ms@ 100% load, with nominal input range
Capacitive load (max)		6000 uF
Rise time (max)		<50 ms
Remote Sense		Up to 500 mV compensation for voltage drop across external wire connections to load. Short and reverse connection protected.
Nominal Output Voltage of standby output (Vrated)¹		5 V
Nominal Output Current of standby output		2 A
Total Regulation of standby output		± 3%
Ripple & Noise of standby output		100 mV max
1) 5V standby output is always on when AC is present

MECHANICAL
Package	Enclosed
Dimensions (L x W x H)	177.8 x 101.6 x 40 mm (7 x 4 x 1.575 inch)
Unit Weight	1.1 kg (2.4 lb)

ENVIRONMENT
Surrounding Air Temperature	Operating Storage	Absolute Maximum/Minimum Rating. -20°C to +70°C. Linear power derate from 100% load at 50°C, to 50% load at 70°C Note: see power de-rating curves below -40°C to +85°C
Operating Humidity		5-95% RH (Non-Condensing)
Operating Altitude		Up to 5,000 meters (up to 16,400 feet or 106-54 kPa)
Non-Operating Altitude		Up to 5,575 meters (up to 18,290 feet or 106-50 kPa)
Shock Test (Non-Operating)		50 G, 11 ms, 3 shocks for each direction
Vibration (Non-Operating)		5-500 Hz, 2 Grms, 15 minute for each three axis
Acoustic Noise (Typical)		45 dB test with 80% of rated load under 30°C²
2) Acoustic Noise test set up according to ISO-7779

PROTECTIONS (For both main output and 5 Volt Standby outputs, unless otherwise indicated)
Overvoltage (max)	Main output 145% of rated normal voltage, Latch Mode Standby 125% of rated voltage, Latch Mode
Over load / Over current (max)	Main output 130% max of rated current for over 750 ms max Standby 3.2 A max with Hiccup Mode(Non-Latching, Auto-Recovery)
Over Temperature	Latch Mode for Main output
Short Circuit	Hiccup Mode for Main output and Standby (Non-Latching, Auto-Recovery)

RELIABILITY DATA
MTBF (Minimum) at 115 Vac, 750 W (700 W for 12 V) , 35 °C	500 Khrs based on Telecordia SR-332
Operating life(Minimum) at 115 Vac, 750 W (700 W for 12 V), 25°C	26,280 hrs

SAFETY STANDARDS/DIRECTIVES
Medical Safety		IEC 60601-1 CB report TUV EN 60601-1 ANSI/AAMI ES 60601-1+CAN/CSA-C22.2 No.60601-1
ITE Safety		IEC 60950-1 CB report IEC 62368-1 CB report TUV EN 62368-1 TUV EN 60950-1 UL 62368-1 and CAN/CSA C22.2 No. 62368-1 CCC GB 17625.1; GB 4943.1; GB/T 9254.1 (for 24 V / 48 V model) KC/KCC (for 24V)
Home Appliance		IEC 60335-1 CB report (for 12 V / 24 V model) IEC 61558-1 CB report (for 12 V / 24 V model) IEC 61558-2-16 CB report (for 12 V / 24 V model) TUV EN 60335-1 (for 12 V / 24 V model) TUV EN 61558-1 (for 12 V / 24 V model) TUV EN 61558-2-16 (for 12 V / 24 V model)
CE		In conformance with EMC Directive 2014/30/EU and Low Voltage Directive 2014/35/EU EN 60601-1: 2006 + A11: 2011 + A1: 2013 + A12: 2014 & EN 60601-1-2: 2015
UKCA		In conformance with Electromagnetic Compatibility Regulations 2016 and Electrical Equipment (Safety) Regulations 2016, Medical Devices Regulations 2002 (UK MDR 2002)
Galvanic Isolation	Input to/Output (2XMOPP) Input to/Ground (1XMOPP) Output to/Ground (1XMOPP)	4000 Vac 1500 Vac 1500 Vac (Type BF application rated)

EMC
EMC / Emissions		EN/BS EN 55011/EN/BS EN 55032: Class B
Harmonic Current Emissions	IEC 61000-3-2	Meet Class D limit
Voltage Flicker	IEC 61000-3-3
Immunity to
Electrostatic Discharge	IEC 61000-4-2	Level 4 Criteria A¹⁾ ⁵⁾ Air Discharge: 15 kV Contact Discharge: 8 kV
Radiated Field	IEC 61000-4-3	Criteria A¹⁾ 80 MHz-2700 MHz, 10 V/m AM modulation Level 2 Criteria A ¹⁾ ⁵⁾ 385 MHz-5785 MHz, 28 V/m Pulse mode and other modulation
Electrical Fast Transient / Burst	IEC 61000-4-4	Level 3 Criteria A¹⁾ 2 kV
Surge	IEC 61000-4-5	Level 3 Criteria A¹⁾ ⁵⁾ Common Mode³⁾: 2 kV Differential Mode⁴⁾: 1 kV
Conducted	IEC 61000-4-6	Level 2 Criteria A¹⁾ ⁵⁾ 150 kHz-80 MHz, 3 Vrms, 6 Vrms, 20 Vrms at ISM bands and Amateur radio bands
Power Frequency Magnetic Fields	IEC 61000-4-8	Criteria A¹⁾ ⁵⁾ Magnetic field strength 30 A/m
Voltage Dips	IEC 61000-4-11	30% 10 ms Criteria A¹⁾ 60% 100 ms Criteria B²⁾ 100% 5000 ms Criteria B²⁾
Voltage Dips ⁵⁾	IEC 60601-1-2	Criteria A ¹⁾ @ 650 W 0% UT, 0.5 cycle (10 ms) (0°,45°,90°,135°,180°,225°,270°,315°,360°) Criteria B ²⁾,can meet Criteria A with 400 W or lower load 0% UT, 1 cycle (20 ms), 0° Criteria B ²⁾ Can meet Criteria A with 500 W or lower load 70% U T, 25 cycle (500 ms) , 0° Criteria B ²⁾ 0% U T, 250 cycle (5000 ms) , 0°
1) Criteria A: Normal performance within the specification limits 2) Criteria B: Output out of regulation, or shuts down during test. Automatically restored to normal operation after test. 3) Asymmetrical: Common mode (Line to earth) 4) Symmetrical: Differential mode (Line to line) 5) Compliant with IEC60601-1-2 4th Edition

Selection Table

MODEL NUMBER	INPUT VOLTAGE	OUTPUT VOLTAGE	OUTPUT CURRENT
MEB-750A12B MEB-750A12T	85 Vac 90-264 Vac	12 Vdc	0-52.08 A 0-58.4 A
MEB-750A24B MEB-750A24T	85 Vac 90-264 Vac	24 Vdc	0-26.04 A 0-31.25 A
MEB-750A48B MEB-750A48T	85 Vac 90-264 Vac	48 Vdc	0-13.02 A 0-15.63 A

Technical Drawings

Downloads

Datasheet_MEB-750A.pdf

Warranty & Returns

Warranty periods vary by product. Please refer to the Powerbox Warranty Policy for the applicable coverage period against manufacturing defects from date of purchase. For returns and RMA requests, please visit our RMA support page or contact our support team directly.

FAQs

What output specifications does the Delta MEB-750A Series provide?

The MEB-750A is available in 12Vdc, 24Vdc, and 48Vdc output models at 750W total output power — for example, the MEB-750A24T delivers 24Vdc at 31.25A. All models accept a universal 90–264Vac input and achieve approximately 92% efficiency.

What medical certifications does the MEB-750A hold?

The MEB-750A is certified to IEC 60601-1 and UL 60601-1 (medical electrical equipment safety), qualifying it for integration into Class I medical devices and equipment used in patient care environments. It also holds IEC 62368-1 for dual-use medical/industrial applications.

How does the MEB-750A compare to the MEB-500A, MEB-1K2A, and MEB-1K5A in the Delta MEB range?

The MEB-750A (750W) is the mid-range model positioned above the MEB-500A (504W) and below the MEB-1K2A (1200W) and MEB-1K5A (1500W). All share the same internal panel-mount enclosed format with intelligent fan speed control and PMBus interface. Choose the MEB-750A when your equipment's power budget falls between 500W and 1000W.

What input voltage range does the MEB-750A accept?

Universal 90–264Vac single-phase input, covering Australian and New Zealand mains (230Vac) and international 115Vac without manual switching. The wide input range supports global equipment designs and Australian/NZ market deployments without modification.

What features support parallel operation and digital control of the MEB-750A?

The MEB-750A supports active current sharing for parallel operation (N+1 redundancy or combined power scaling), PMBus v1.3 digital interface for voltage adjustment and monitoring, and analogue ±10% voltage adjustment. Intelligent fan speed control minimises audible noise relative to load conditions.

How does the MEB-750A's medical isolation rating qualify it for patient-environment use?

The MEB-750A provides 2×MOPP (Means of Patient Protection) isolation between input and output, meeting the IEC60601-1 third edition requirements for devices operating in direct patient care environments. This leakage current level is mandatory for applied parts and patient-connected equipment in Australian medical device compliance. Contact Powerbox at sales@powerbox.com.au for compliance documentation.