24V6A 150W switching power supply board high-power power module bare board 110V / 220V to 24V (D4A4)

The 24V6A 150W switching power supply board is a high-efficiency bare board module designed to convert AC input from 110V or 220V mains to regulated 24V DC output with 6A continuous current capacity. This industrial-grade power module is essential for engineers and technicians working with LED lighting systems, automation equipment, industrial control panels, and embedded systems requiring stable 24V power delivery. It solves critical power distribution challenges in applications demanding reliable, compact, and cost-effective DC power conversion without the bulk of traditional linear power supplies.

Product Overview

The D4A4 switching power supply operates on the principle of high-frequency pulse-width modulation (PWM) to achieve superior efficiency and minimal heat dissipation. Unlike linear regulators that waste excess voltage as heat, this switching topology converts input AC power at frequencies around 50-60Hz to high-frequency switching signals (typically 100kHz or higher), enabling the use of smaller transformers and filter components. The bare board design allows integration into custom enclosures or OEM applications, providing flexibility for engineers designing specialized power distribution systems. The module incorporates multiple protection mechanisms including overcurrent limiting, thermal shutdown, and short-circuit protection to ensure safe operation under fault conditions.

This particular model excels in applications requiring dual input voltage compatibility, making it ideal for regions with varying mains standards or portable equipment requiring international operation. The 150W power rating at 24V6A provides substantial headroom for inductive loads, surge currents, and transient conditions common in industrial environments. The bare board configuration eliminates unnecessary packaging, reducing cost and weight while maintaining full electrical performance. Built-in filtering ensures output ripple voltage remains below 100mV, suitable for sensitive analog circuits, microcontroller systems, and precision measurement equipment.

Key Specifications

Specification	Details
Product Type	Switching Power Supply Module Bare Board
Model	D4A4
Output Voltage	24V DC
Output Current	6A Continuous
Power Rating	150W
Input Voltage Range	110V AC or 220V AC (selectable)
Input Frequency	50-60Hz
Efficiency	Greater than 85%
Output Ripple Voltage	Less than 100mV peak-to-peak
Switching Frequency	100kHz (typical)
Protection Features	Overcurrent, Overvoltage, Thermal Shutdown, Short-Circuit Protection
Operating Temperature	0 to 50 degrees Celsius
Storage Temperature	-20 to 70 degrees Celsius
Brand	Original Manufacturer
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp

Key Features

• Dual Input Voltage Selection: Automatic or manual selection between 110V and 220V AC input, eliminating the need for separate units for different regions
• High Power Density: 150W output in a compact bare board form factor, delivering 6A at 24V for space-constrained applications
• Superior Efficiency: Greater than 85% conversion efficiency reduces power loss and heat generation, lowering cooling requirements
• Comprehensive Protection Circuitry: Integrated overcurrent limiting, thermal shutdown at 80 degrees Celsius, and short-circuit protection ensure equipment longevity
• Low Output Ripple: Less than 100mV peak-to-peak ripple voltage suitable for sensitive analog circuits and precision instrumentation
• Fast Transient Response: PWM control delivers stable output voltage even during rapid load changes typical in digital logic circuits
• Wide Operating Temperature Range: Functions reliably from 0 to 50 degrees Celsius, suitable for industrial and outdoor installations
• Bare Board Design: No unnecessary casing allows direct integration into custom enclosures, reducing overall system cost and weight

Applications and Use Cases

• Industrial LED Lighting Systems: Powers high-brightness LED arrays in factory floors, warehouses, and outdoor installations where 24V DC is the standard control voltage
• Automation and Control Panels: Supplies regulated 24V power to PLC modules, solenoid valves, relay circuits, and sensor networks in manufacturing automation
• Security and Access Control: Provides reliable power for electronic door locks, CCTV camera power distribution, and access control system logic boards
• Telecommunications Equipment: Supports telecom rack power distribution, VoIP systems, and network infrastructure requiring stable 24V DC rails
• Medical Equipment: Powers patient monitoring systems, diagnostic equipment, and hospital-grade control modules requiring clean, regulated 24V output
• Railway and Transportation: Used in signaling systems, ticketing machines, and passenger information displays requiring dual-voltage input capability
• Renewable Energy Systems: Integrates into solar inverter systems and wind power control electronics as a secondary power supply module
• OEM and Custom Equipment: Enables original equipment manufacturers to design compact, efficient power subsystems for specialized industrial applications

How to Use

Installation of the D4A4 switching power supply requires careful attention to input voltage selection and proper wiring practices. First, identify your mains supply voltage (110V or 220V) and verify the input selection jumper or switch on the bare board is correctly configured. Connect the AC input terminals to your mains supply through an appropriate circuit breaker rated for at least 10A; never directly connect without overcurrent protection. Ensure proper grounding by connecting the earth/ground wire from your mains supply to the designated ground terminal on the board. The output terminals provide 24V positive and negative rails; verify polarity before connecting your load to prevent equipment damage.

For optimal performance, mount the bare board on a thermally conductive surface or within an enclosure with adequate ventilation to prevent thermal shutdown during continuous operation at full 6A load. Allow at least 10cm clearance around the board for air circulation. Connect your load in parallel across the 24V output terminals, ensuring total current does not exceed 6A continuous rating. If your application requires higher currents, multiple modules can be paralleled with current-sharing diodes or active load-sharing circuits. Always verify output voltage (should be 24V plus or minus 5%) before connecting sensitive equipment. For transient-prone environments, consider adding external capacitors across the output terminals to improve transient response and reduce voltage sag during load steps.

Frequently Asked Questions

What is the difference between this bare board and a fully enclosed power supply?

The bare board D4A4 eliminates the metal enclosure, cooling fan, and connector assembly found in complete power supplies, reducing cost and weight by approximately 40-50%. This design is ideal for OEM integration into custom enclosures or systems where space is at a premium. The trade-off is that you must provide your own mechanical protection and ensure adequate ventilation. Fully enclosed units are better for standalone applications requiring portability and immediate usability without additional assembly.

Can I parallel multiple D4A4 boards to increase output current beyond 6A?

Yes, multiple D4A4 boards can be paralleled to achieve higher output currents. However, proper current-sharing is essential to prevent one module from carrying excessive load. Implement current-sharing using either passive methods (low-value series resistors on each output) or active methods (using a dedicated current-sharing IC). Without proper current-sharing, one module may reach thermal shutdown while others remain underutilized. We recommend consulting our technical team for guidance on your specific multi-module configuration.

What happens if I connect the input voltage incorrectly between 110V and 220V settings?

Connecting 220V AC to a board configured for 110V input will immediately cause overvoltage stress on the primary-side components, likely resulting in component failure, smoke, and potential fire hazard. The reverse scenario (110V connected to 220V setting) will cause insufficient power delivery and thermal shutdown under load. Always verify your mains voltage with a multimeter before power-up and ensure the input selection jumper matches your supply voltage. This is a critical safety consideration.

What output ripple voltage should I expect and is it suitable for my application?

The D4A4 delivers output ripple voltage less than 100mV peak-to-peak, which is excellent for most industrial applications. This ripple is suitable for digital logic circuits, microcontrollers, relay circuits, and LED drivers. However, if your application involves precision analog measurement (sub-millivolt accuracy), audio amplification, or sensitive RF circuits, you should add external output filtering using a 1000uF electrolytic capacitor in parallel with a 0.1uF ceramic capacitor at the load terminals. This additional filtering can reduce ripple to below 10mV.

How do I know if the module is in thermal shutdown and how do I recover it?

When the internal temperature exceeds approximately 80 degrees Celsius, the module automatically reduces output current to limit heat generation. You will notice the output voltage remaining stable but unable to deliver full 6A current. Recovery is automatic: simply reduce the load or improve ventilation to allow the module temperature to drop below the shutdown threshold. The module will gradually restore full current capability as it cools. Repeated thermal shutdowns indicate inadequate cooling and suggest you need better ventilation or a larger power supply for your application.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

Why Buy from The Engineer Store

• Genuine Products: Sourced directly from authorized distributors with authentication
• Expert Team: Our technical team validates every product before listing
• Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
• Pan-India Delivery: 7-8

Buy 24V6A 150W switching power supply board high-power power module bare board 110V / 220V to 24V (D4A4) Online in India

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