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Mean Well

Mean Well MHB75-48S24 DC-DC Converter - 75W - 36~72V in 24V out 3.13A

SKU MHB75-48S24
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Overview

MHB75-48S24 is the 24V 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

MHB75-48S24Specifications from the official datasheet (2024-04-30 edition)

OUTPUT

DC VOLTAGE
24V
CURRENT RANGE
0 ~ 3.13A
RATED POWER
75W
RIPPLE & NOISE (max.)Note.2
240mVp-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.)
2000uF

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

MHB75-48S24 M H B 7 5 series
M H B 7 5 series
MHB75-48S24 Remote ON/OFF Control
Remote ON/OFF Control
MHB75-48S24 +Vin
+Vin
MHB75-48S24 Output
Output
MHB75-48S24 Thermal Curve
Thermal Curve
MHB75-48S24 Case Heat Sink (Optional)
Case Heat Sink (Optional)
MHB75-48S24 Heatsink Assembly
Heatsink Assembly
MHB75-48S24 Packing
Packing

Downloads

FAQ

Can I use the MHB75-48S24 for 24V automation controllers in a 48V power system?

Yes, this model provides constant 24V output from a 36-75VDC input range. It supports loads up to 3.13A and 75W, which suits many 24V control and embedded electronics that remain within those limits.

Is this a good fit for 24V industrial sensors, I/O modules, or interface electronics?

It can be used where those devices need a stable 24V supply and the total current draw stays at or below 3.13A. The output is fixed at 24V and can be trimmed by ±10% with an external resistor if needed.

Can the MHB75-48S24 power 24V telecom or monitoring equipment from a higher-voltage source?

It is suitable when the source is within 36-75VDC and the load requires 24V at up to 3.13A. That makes it relevant for compact 24V communication, monitoring, or embedded equipment that fits inside a 75W power budget.

Would this model work in space-constrained embedded equipment?

It is relatively compact at 61.0 x 57.9 x 12.7 mm and weighs 95 g, which supports use in dense assemblies. The key electrical fit is still the same: 36-75VDC input and constant 24V output up to 3.13A.

Can the MHB75-48S24 be used in demanding indoor temperature conditions?

The specified operating range is -40°C to +100°C case temperature, with thermal shutdown at 100°C ±5°C, and derating or cooling is needed per the thermal curve. No IP rating is listed in the specs, so it should not be treated as an outdoor-exposure product unless the end equipment enclosure provides that protection.

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Mean Well MHB75-48S24 DC-DC Converter - 75W - 36~72V in 24V out 3.13A
Mean Well

Mean Well MHB75-48S24 DC-DC Converter - 75W - 36~72V in 24V out 3.13A

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MHB75-48S24 is the 24V 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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