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Mean Well

Mean Well MHB75-48S12 DC-DC Converter - 75W - 36~72V in 12V out 6.25A

SKU MHB75-48S12
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Overview

MHB75-48S12 is the 12V output model of this series: rated power 75W, typical efficiency 89%.

Features

  • Half-brick size (2.28"×2.4"×0.5") with industry standard pin out
  • 2:1 wide input range
  • Protections: Short circuit / Over current / Over voltage / Over temperature
  • High efficiency up to 89%
  • 1500VDC I/O isolation
  • Built-in remote ON/OFF control
  • Built-in remote sense function
  • Trimming output ±10%
  • Five-sided shield metal case
  • Optional heat sinks for extended operating temperature
  • Output 3.3V/15V available
  • Approvals: UL / CUL / EAC / CE / UKCA
  • 3 years warranty

Specifications

MHB75-48S12Specifications from the official datasheet (2024-04-30 edition)

OUTPUT

DC VOLTAGE
12V
CURRENT RANGE
0 ~ 6.25A
RATED POWER
75W
RIPPLE & NOISE (max.)Note.2
100mVp-p
VOLTAGE ACCURACYNote.3
±1.0%
LINE REGULATION
±0.2%
LOAD REGULATION
±0.2%
SWITCHING FREQUENCY (Typ.)
400KHz for 12/24Vin, 300KHz for 48Vin
EXTERNAL TRIM ADJ. RANGE (Typ.)
±10%
EXTERNAL CAPACITIVE LOAD (max.)
10000uF

INPUT

RATED DC INPUT
48VDC
VOLTAGE RANGE
36 ~ 75VDC
SURGE VOLTAGE (100ms max.)
100VDC
UNDER VOLTAGE LOCKOUT
Power up: 34VDC, Power down: 32.5VDC
EFFICIENCY (Typ.)
89%
DC CURRENT FULL LOAD
1800mA
DC CURRENT NO LOAD
50mA
FILTER
Pi-network

PROTECTION

OUTPUT OVER CURRENT
110 ~ 150% rated output power Protection type : Over current limiting, recovers automatically after fault condition is removed
OUTPUT OVER VOLTAGE (Typ.)
115 ~ 140% rated output voltage Protection type : Output voltage clamp by TVS diode
OUTPUT SHORT CIRCUIT
Protection type : Can be continuous, recovers automatically after fault condition is removed
OVER TEMPERATURE
100℃±5℃of case temperature

FUNCTION

REMOTE CONTROL
Please refer to "Remote ON/OFF Control" for details

OPERATING

OUTPUT TRIMMING
±10%, Please refer to "External Output Trimming" for details

ENVIRONMENT

WORKING TEMPERATURE (Typ.)
-40 ~ +100℃ ; Thermal shutdown at 100℃±5℃of case temperature (please refer to "Thermal Curve")
WORKING HUMIDITY
0% ~ 95% RH max.
STORAGE TEMP., HUMIDITY
-55 ~ +105℃, 0 ~ 95% RH
TEMP. COEFFICIENT
±0.03%/℃ (0~60℃)

SAFETY & EMC

SAFETY STANDARDS
UL60950-1, EAC TP TC 020/2011(EAC TP TC 004 for 48Vin type only) approved
ISOLATION VOLTAGE
I/P-O/P:1500VDC, I/P-Case:1500VDC, O/P-Case:1500VDC
ISOLATION RESISTANCE
I/P-O/P:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION
Compliance to BS EN/EN55032 (CISPR32) Class A with external components (please refer to "EMC Suggestion Circuit"), EAC TP TC 020
EMC IMMUNITY
Compliance to BS EN/EN61000-4-2,3,4,5,6,8; BS EN/EN55024, light industry level, criteria A, EAC TP TC 020

OTHERS

CASE MATERIAL
Aluminum
MTBF
1000K hrs typ. MIL-HDBK-217F (25℃)
DIMENSION
57.9*61*12.7mm (2.28"*2.40"*0.5") (L*W*H)
PACKING
95g ; 12pcs/EPE, 60pcs/5 per carton
Test conditions and notes4
  1. 1. All parameters NOT specially mentioned are measured at 12,24,48VDC input, rated load and 25℃ of ambient temperature.
  2. 2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 1uF ceramic & 10uF tantalum capacitor across output.
  3. 3. The power supply need to connect "+Vout" to "+R.S" and "-Vout" to "-R.S".
  4. 4. The power supply is considered a component which will be installed into a final equipment. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.”

Technical drawings

MHB75-48S12 M H B 7 5 series
M H B 7 5 series
MHB75-48S12 Remote ON/OFF Control
Remote ON/OFF Control
MHB75-48S12 +Vin
+Vin
MHB75-48S12 Output
Output
MHB75-48S12 Thermal Curve
Thermal Curve
MHB75-48S12 Case Heat Sink (Optional)
Case Heat Sink (Optional)
MHB75-48S12 Heatsink Assembly
Heatsink Assembly
MHB75-48S12 Packing
Packing

Downloads

FAQ

Can I use the MHB75-48S12 to run 12V industrial control electronics from a 48V bus?

Yes, this model is intended for systems that need a constant 12V output from a 36-75VDC input range (48VDC nominal). It can supply up to 6.25A and 75W, which fits many 12V control boards, relays, and embedded devices that stay within those limits.

Is this converter suitable for 12V HMI panels or operator interfaces in automation equipment?

It can be a fit when the HMI or interface requires constant 12V power and the total load stays at or below 6.25A and 75W. The 36-75VDC input range also makes it relevant for equipment platforms built around nominal 48V power systems.

Can the MHB75-48S12 power 12V communication or embedded monitoring devices in industrial cabinets?

Yes, if the connected devices need a regulated 12V output and their combined demand does not exceed 75W or 6.25A. Its compact 61.0 x 57.9 x 12.7 mm size also helps in dense control assemblies where board space is limited.

Which MHB75 variants are closest alternatives to the MHB75-48S12?

Within the listed siblings, the 48V-input alternatives are MHB75-48S05 at 75W, 5V, 15A and MHB75-48S24 at 75W, 24V, 3.13A. The family also includes 12V-input and 24V-input versions in 5V, 12V, and 24V outputs: MHB75-12S05, MHB75-12S12, MHB75-12S24, MHB75-24S05, MHB75-24S12, and MHB75-24S24.

Is the MHB75-48S12 appropriate for harsh temperature environments?

Its specified operating range is -40°C to +100°C case temperature, with thermal shutdown at 100°C ±5°C; proper derating or cooling is needed per the thermal curve. The sheet does not list an IP rating, so enclosure or exposure suitability should be judged from the final system housing rather than this converter alone.

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Mean Well MHB75-48S12 DC-DC Converter - 75W - 36~72V in 12V out 6.25A
Mean Well

Mean Well MHB75-48S12 DC-DC Converter - 75W - 36~72V in 12V out 6.25A

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MHB75-48S12 is the 12V output model of this series: rated power 75W, typical efficiency 89%.

Features

  • Half-brick size (2.28"×2.4"×0.5") with industry standard pin out
  • 2:1 wide input range
  • Protections: Short circuit / Over current / Over voltage / Over temperature
  • High efficiency up to 89%
  • 1500VDC I/O isolation
  • Built-in remote ON/OFF control
  • Built-in remote sense function
  • Trimming output ±10%
  • Five-sided shield metal case
  • Optional heat sinks for extended operating temperature
  • Output 3.3V/15V available
  • Approvals: UL / CUL / EAC / CE / UKCA
  • 3 years warranty
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