48W Ultra-Thin AC-DC Power Module— 220V to 12V 4A / 24V 2A / 48V 1A Industrial Open-Frame Switching Power Supply
What Is the MP-H48SXX-FT Series AC-DC Power Module?
If you are designing industrial automation equipment, communication systems, or electronic instrumentation, you will need a stable and reliable power supply. So, what is the MP-H48SXX-FT series power module, and what can it do for you?
In simple terms, the MP-H48SXX-FT series is a 48W ultra-thin AC-DC switching power supply module that converts 176–264VAC input into stable 12V, 24V, or 48V DC outputs. Its open-frame (bare-board) design keeps the footprint compact — just 76 × 50 × 17.5 mm — making it ideal for space‑constrained industrial equipment integration.
Three output-voltage models are available:
MP-H48S12-FT : 12V output, up to 4A
MP-H48S24-FT : 24V output, up to 2A
MP-H48S48-FT : 48V output, up to 1A
At 230VAC input and full load, the conversion efficiency reaches as high as 88%. It uses natural convection cooling (no fan needed) and operates reliably across a wide temperature range from ‑25°C to +60°C.
That is why the MP-H48SXX-FT series is widely adopted in industrial automation machinery, industrial control systems, communication equipment, and electronic instrumentation.
Mounting Instructions
Mounting screws : M3, recommended length 6mm, max torque 0.4N·m
Grounding : Positions ② and ③ must be connected to earth ground for safety.
Terminals : Input uses KF301-5.0‑3P (hollow), output uses KF301-5.0‑2P.
⚠️ Important: Both mounting holes ② and ③ must be reliably grounded to ensure safe operation.
Key Features: Why Choose the MP-H48SXX-FT Series?
1. Ultra-Thin Open-Frame Design, Space-Saving
With dimensions of only 76 × 50 × 17.5 mm (less than 2 cm thick), this module easily fits into compact equipment enclosures without wasting valuable space.
2. Wide Input Voltage Range
Supports 176–264VAC AC input as well as 120–373VDC DC input. The wide‑range design ensures stable operation under various power grid conditions worldwide.
3. Natural Convection Cooling – No Fan Needed
The module uses natural air convection for cooling. It delivers 36W at 110VAC input and 48W at 220VAC input. Fanless operation means zero noise, higher reliability, and longer service life.
4. Three Output Voltage Options
Choose from 12V, 24V, or 48V models to match the power requirements of your equipment.
5. High Conversion Efficiency
With up to 88% efficiency (at 230VAC full load), the module generates less heat and wastes less energy.
6. Output Voltage Trim (Adjustable)
An onboard trimming potentiometer (ADJ) allows the output voltage to be adjusted within ±10% of the nominal value, giving you flexibility for different load requirements.
7. Comprehensive Protection Features
Input undervoltage protection : 60–80VAC
Output overcurrent protection : 110%–150% of rated current, hiccup mode, auto‑recovery
Output overvoltage protection : 110%–130% of rated voltage, hiccup mode, auto‑recovery
Output short‑circuit protection : shuts down on short, auto‑recovery when fault is removed
Overtemperature protection : output voltage shuts down, recovers after power cycling
8. High Isolation Voltage
Isolation voltage between input and output is 3000VAC, ensuring safety and reliability.
9. Wide Operating Temperature Range
Operates stably from ‑25°C to +60°C, suitable for demanding industrial environments.
Typical Applications
Industrial automation equipment, PLC peripheral power supply, communication devices, test & measuring instruments, smart control cabinets, DIY equipment retrofit, non‑fan enclosed system power supply.
Protection Functions & Safety Approvals
Comprehensive Protection
The MP-H48SXX-FT series integrates five layers of protection to safeguard both the power supply and the connected load:
| Protection Type | Trip Condition | Recovery |
|---|---|---|
| Input Undervoltage | 60–80VAC | Auto‑recovery |
| Output Overcurrent | 110%–150% rated current | Hiccup mode, auto‑recovery when current drops below 105% |
| Output Overvoltage | 110%–130% rated voltage | Hiccup mode, auto‑recovery |
| Output Short‑Circuit | Output shorted | Auto‑recovery after fault removal |
| Overtemperature | Internal overheat | Output disabled, recovers after power‑cycle |
Safety & EMC Compliance
Safety Standard : IEC62368-1
EMC : CISPR32/EN55032 Class B, EN61000-4-2/3/4/6 Class B
Dielectric Strength : I/P–O/P:3000VAC, I/P–FG:1500VAC, O/P–FG:500V (1 min, leakage <5mA)
- Insulation Resistance : I/P–O/P, I/P–FG, O/P–FG >100MΩ @500VDC
Application Scenarios
1. Industrial Automation Machinery
PLC systems, servo drives, industrial robots, and automated production lines all require stable power. The MP-H48SXX-FT’s high reliability and wide temperature range make it an ideal choice.
2. Industrial Control Systems
Process control, data acquisition, and instrumentation demand low ripple and high precision. With ±2%~±3% voltage accuracy and low ripple, this module meets those needs.
3. Communication Equipment
Base stations, network switches, and routers need continuous operation. The high efficiency (88%) and long‑life design reduce operating costs and maintenance frequency.
4. Electronic Instrumentation
Test & measurement devices, medical equipment, and laboratory instruments require safety and reliability. The 3000VAC isolation and comprehensive protections ensure operator and equipment safety.
5. LED Lighting
The 12V and 24V models are ideal for driving LED strips, decorative lighting, and signage.
6. DIY & Maker Projects
The ultra‑thin size and terminal‑block wiring make it perfect for custom power distribution, 3D printers, CNC routers, and other maker projects.
How to Choose the Right Model
| Requirement | Recommended Model | Output Specification |
|---|---|---|
| 12V supply, current >3A | MP-H48S12-FT | 12V / 4A (at 220VAC input) |
| 24V supply, current >1.5A | MP-H48S24-FT | 24V / 2A (at 220VAC input) |
| 48V supply | MP-H48S48-FT | 48V / 1A (at 220VAC input) |
Selection Tips:
Input voltage conditions : At 176–200VAC, output power is 36W; at 200–240VAC, it is 48W. Choose based on your actual mains supply.
Load characteristics : Ensure the load’s inrush current stays within the overcurrent protection range (110%–150% of rated current).
Cooling : Natural convection requires adequate airflow around the module.
Space : Verify that your enclosure has enough room for the 76×50×17.5mm module.
Q1: What is the actual continuous power of this 48W power module?
A: It delivers stable 36W continuous power under 100‑176VAC input; peak 48W output under 176‑264VAC. For long‑term 48W running, keep input voltage within 176‑264VAC and ensure good natural ventilation.
Q2: Can I run this power supply in fully sealed box without ventilation holes?
A: It adopts natural air cooling. Fully hermetic enclosure without airflow will trigger over‑temperature protection. You need to reserve ventilation space or derate output power.
Q3: Is output voltage adjustable?
A: Yes. Built‑in ADJ potentiometer supports ±10% output voltage fine‑tuning for slight offset compensation.
Q4: What protection functions does this bare‑board power have?
A: Under‑voltage input lockout, output over‑voltage, over‑current, short‑circuit protection and over‑temperature shutdown. Most faults support auto‑recovery after abnormal condition is removed.
Q5: What isolation voltage rating for this AC‑DC power board?
A: Input‑to‑output isolation: 3000VAC, meets IEC62368‑1 industrial safety requirement.
Q6: What connector does this power module use?
A: Input terminal: KF301‑5.0‑3P hollow; Output terminal: KF301‑5.0‑2P. Compatible with JST VHR series matching connectors.
Q7: Can it work below zero temperature?
A: Operating temperature range: ‑25℃ ~ +60℃. It can start and work at low temperature, performance degrades at upper‑limit high temperature.
Q8: Can I use this power for 24‑hour non‑stop industrial equipment?
A: Yes, it is designed for 24/7 continuous industrial operation, but please follow power‑derating rule under high‑temperature environment.
The MP-H48SXX-FT series 48W ultra‑thin AC‑DC power module is a high‑reliability power solution tailored for industrial applications. It excels in:
Ultra‑thin form factor — 76×50×17.5mm fits tight spaces
High efficiency — up to 88% reduces heat and energy costs
Wide temperature range — -25°C to +60°C handles harsh environments
Comprehensive protections — five layers safeguard your system
High isolation — 3000VAC for operator safety
Flexible output options — 12V, 24V, or 48V models
Natural cooling — silent, reliable, long‑lasting
Whether for industrial automation, communications, instrumentation, or DIY projects, the MP-H48SXX-FT series delivers stable, efficient, and dependable power.
If you are developing new industrial equipment or electronic products, need AC‑DC power modules, switching power supplies, or other components, or face shortages and need alternative sourcing, QIXINWEI can support component procurement, BOM matching, model comparison, and supply‑chain solutions. For projects that require a stable supply rather than the lowest unit price, choosing the right configuration from the start saves time during testing and mass production.