DC Power Supply

Q: What is the output voltage and current range of this DC power supply?

The output voltage is adjustable from 0 to 30 volts, and the output current is adjustable from 0 to 5 amperes. The maximum output power is 150 watts. These are typical ranges; always confirm the exact specifications for the specific model with the manufacturer.

Q: What protection features does this power supply have?

It includes overvoltage protection (OVP), overcurrent protection (OCP), and overtemperature protection (OTP). These safeguards help prevent damage to the power supply and connected equipment under abnormal conditions.

Q: What is the efficiency of this power supply?

The efficiency is at least 85%, meaning that at least 85% of the input power is converted to output power, with the remainder dissipated as heat. Actual efficiency may vary with load and operating conditions.

Q: What are the dimensions and weight of this power supply?

The dimensions are 215 mm in width, 88 mm in height, and 280 mm in depth. The approximate net weight is 3.2 kg. These are typical for a bench-top unit; verify with the manufacturer for the exact model.

Product Specifications

Technical details and manufacturing context for DC Power Supply

Definition

A DC power supply is an electrical apparatus designed to convert alternating current from a mains power source into a stable, regulated direct current output. It serves as a critical component in electronic systems by providing consistent voltage and current levels, protecting sensitive circuits from power fluctuations, and enabling precise control over electrical parameters for testing, development, and operational applications. This device typically features adjustable output voltage and current, with ranges such as 0–30 V and 0–5 A, and a maximum output power of 150 W. It includes protection mechanisms like overvoltage, overcurrent, and overtemperature safeguards. The unit operates with an input voltage range of 100–240 V AC and achieves an efficiency of at least 85%. Voltage regulation is maintained within ≤0.01% + 1 mV, and load regulation within ≤0.02% + 2 mV for a 10% to 100% load change. Ripple and noise are kept below 1 mVrms. The device is designed for bench-top use with dimensions of 215×88×280 mm and a weight of approximately 3.2 kg. It operates within an ambient temperature range of 0–40°C. The display accuracy is ±(0.5% + 2 digits) for voltage and current readings. Constructed with materials such as aluminum alloy, copper, silicon, plastic polymers, and ferrite cores, this power supply is suitable for various electronic testing and development applications. It is essential to verify model-specific specifications and standards with the legal manufacturer or supplier before procurement or use.

Working Principle

The DC power supply operates by first stepping down the AC input voltage through a transformer, then rectifying it using diodes to convert AC to pulsating DC. This is followed by filtering with capacitors to smooth the waveform, and finally regulation through electronic circuits (linear or switching) to maintain a constant output voltage despite variations in input or load conditions. Advanced units incorporate feedback control loops, protection circuits, and digital interfaces for monitoring and adjustment.

Common Materials

Aluminum Alloy, Copper, Silicon, Plastic Polymers, Ferrite Core

Technical Parameters

Parameter	Typical range	Notes & selection driver
Output VoltageRequired	0–30 volts	The regulated DC voltage provided by the power supply
Output CurrentRequired	0–5 amperes	Maximum continuous current the power supply can deliver
Output PowerRequired	150 watts	Maximum power output calculated as voltage multiplied by current
Voltage RegulationRequired	≤0.01% + 1 mV percent	Percentage change in output voltage from no-load to full-load conditions
Ripple and NoiseRequired	≤1 mVrms millivolts	AC component superimposed on the DC output, measured peak-to-peak
Input Voltage RangeRequired	100–240 volts	Acceptable AC input voltage range for proper operation
EfficiencyRequired	≥85% percent	Ratio of output power to input power, indicating energy conversion effectiveness
Operating TemperatureRequired	0–40 degrees Celsius	Ambient temperature range within which the power supply operates within specifications
Load Regulation	≤0.02% + 2 mV	From 10% to 100% load change
Line Regulation	≤0.01% + 1 mV	For ±10% input voltage variation
Protection	OVP, OCP, OTP	Overvoltage, overcurrent, overtemperature
Display Accuracy	±(0.5% + 2 digits)	Voltage and current display
Dimensions (W×H×D)	215×88×280 mm	Bench-top form factor
Weight	3.2 kg	Approximate net weight

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Transformer
Steps down or isolates the AC input voltage to appropriate levels for rectification

Material: Copper windings on laminated iron or ferrite core
Rectifier Circuit
Converts AC voltage to pulsating DC using diodes arranged in bridge configuration

Material: Silicon diodes on printed circuit board
Filter Capacitors Part
Smooths the pulsating DC output from the rectifier to reduce ripple voltage

Material: Aluminum electrolytic or film capacitors
Voltage Regulator
Maintains constant output voltage despite input variations or load changes

Material: Integrated circuit or discrete transistors on heat sink
Heat Sink Part
Dissipates heat generated by power components to prevent overheating

Material: Aluminum alloy with finned design
Control Panel
Provides user interface for voltage/current adjustment, display, and monitoring

Material: Plastic housing with membrane switches or rotary encoders
Output Terminals Part
Connection points for attaching load devices to receive DC power

Material: Copper alloy binding posts or banana jacks
Protection Circuitry
Safeguards against over-voltage, over-current, short-circuit, and thermal overload conditions

Material: Electronic components on printed circuit board
Cooling Fan Optional
Forced air cooling for high-power units to maintain optimal operating temperature

Material: Plastic fan blades with DC brushless motor
Digital Interface
Enables remote control, programming, and monitoring via communication protocols

Material: Electronic components with communication ports

Application & selection

Application Fit & Sizing Matrix

Operational Limits

pressure:	N/A (atmospheric operation)
other spec:	Input voltage: 100-240V AC, 50/60Hz; Output regulation: ±0.1% + 2mV; Ripple & noise: <1mV RMS
temperature:	0°C to 40°C (operating), -20°C to 70°C (storage)

Media Compatibility

✓ Laboratory test benches ✓ Electronic circuit development ✓ Industrial automation control systems

Unsuitable: High-vibration or explosive environments (requires specialized enclosures)

Sizing Data Required

Required output voltage range (V)
Maximum output current requirement (A)
Power/load regulation precision needed (%)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause

Output voltage instability or failure

Cause: Aging or failure of electrolytic capacitors due to high operating temperatures, ripple current stress, or prolonged use beyond rated lifespan, leading to reduced capacitance or increased ESR.

Overheating and thermal shutdown

Cause: Insufficient cooling from dust accumulation on heatsinks or fans, poor ventilation, or component degradation (e.g., failing MOSFETs or rectifiers) causing excessive power dissipation.

Maintenance Indicators

Audible buzzing or humming from transformers or capacitors, indicating loose windings, magnetic saturation, or capacitor failure.
Visible discoloration, bulging, or leaking from electrolytic capacitors on the PCB, signaling imminent failure.

Engineering Tips

Implement periodic thermal imaging inspections to identify hot spots on components like capacitors, transformers, and power semiconductors, allowing proactive replacement before failure.
Use a regulated, clean input power source with surge protection and maintain ambient temperature below 40°C to reduce thermal stress on sensitive components like capacitors and ICs.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards

IEC 61010-1: Safety requirements for electrical equipment for measurement, control, and laboratory use EN 55011: Industrial, scientific and medical (ISM) radio-frequency equipment - Radio-frequency disturbance characteristics - Limits and methods of measurement UL 61010-1: Standard for Safety for Electrical Equipment for Measurement, Control, and Laboratory Use

Quoted from the published standard.

Manufacturing Precision

Output Voltage Regulation: +/- 0.1% of full scale
Ripple and Noise: < 1 mV RMS

Quality Inspection

Load Regulation Test
Temperature Drift Test

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

Compare the published product scope and source details, then include your specifications and quantity in an enquiry.

Manufacturers of DC Power Supply

12 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

MEWOI Electronics Co., Ltd

Guangzhou, Guangdong, CN

Also makes: High Voltage Generator, Current Transformer, Surge Protection Device and 6 more