12v4a Desktop Power

Shenzhen Boerze Power Technology Co., Ltd. is one of the leading manufacturers and suppliers of 12v4a desktop power in China. With abundant experience, we are committed to providin high quality customized products made in China with low price. Please feel free to buy cheap 12v4a desktop power from our factory. Welcome to contact us for free sample.

 

 

12V 4A Two-Wire Desktop-Style Adapter

12V 4A (48W) desktop power adapter. It supports a wide AC input range (100–240V) and provides a stable, regulated DC output. Equipped with multiple protection features-including overvoltage, overcurrent, and short-circuit protection-it offers high energy efficiency and low ripple. ODM customization is available, with tailored voltage specifications.

Customizable voltage(V)	Customizable current(A)	Rated power(W)
5	8	40
9	5	45
12	4	48
15	3.2	48
18	2.6	46.8
19	2.5	47.5
24	2	48
36	1.3	46.8
48	1	48

 

12V 4A Desktop Power Adapter with Cord

12V 4A (48W) desktop power adapter,Ideal for security DVRs, high-power LED strips, industrial control modules, smart home appliances, and small-scale advertising equipment. Compared to a 12V 3A unit, it provides greater power headroom and superior load-bearing capacity, ensuring more stable operation for DC-powered devices with higher power demands. ODM customization is available, with options for various DC connectors.

The AC input plug can be customized:	US UK EU AU CN SANS India Korea
The DC output connector can be customized:	5.5*2.5mm, 5.5*2.1mm, 2.0*0.6mm, 2.5*0.7mm, 3.0*1.1mm, 3.5*1.35mm, 4.0*1.7mm, 4.5*2.7mm, 4.8* 1.7mm, 6.3*3.0mm, 7.4*5.0mm, 7.9*5.5mm, Cigarette Butt Connector, USB, TYPE-C
The line length can be customized:	1m, 1.2m, 1.5m, 1.8m, 2.0m, 2.5m, 2.8m and etc.

why choose us?

Our factory is a professional manufacture specialized in power adapters,with complete production facilities and maturer production lines

Facilities&Equipment:

SMT automated assembly workshop, equipped with multiple SMT placement machines and reflow soldering systems for high-speed PCB assembly.Comprehensive assembly lines, staffed by skilled workers who handle component insertion, soldering, and final assembly processes.Burn-in testing area: featuring large-scale burn-in racks where all finished products undergo powered burn-in testing to screen out any defective units.Equipped with a full range of testing instruments, capable of performing electrical, ripple, and safety compliance tests.

Quality control

We have established a multi-layered quality control system-spanning incoming component inspection and in-process production checks to finished-product testing, burn-in, and final comprehensive inspection-to ensure the stability and reliability of our power supply units. We also provide support to clients throughout the process of obtaining relevant certifications.

Production capacity:

We possess full-chain production capabilities and offer OEM & ODM customization services, including options for various voltage and current ratings, AC plugs, DC connectors, and custom enclosure screen printing. Our product range includes adapters with specifications spanning 5V to 48V, widely used in sectors such as security, LED lighting, industrial control, smart home systems, and battery charging. We maintain an average daily output of 20,000 units, with a total monthly production capacity of 400,000 to 500,000 units.

Certification&After-Sales Service

Our products hold certifications for countries and regions worldwide and come with a one-year warranty. In the event of a quality issue-provided it is not due to human-caused damage-we offer a free replacement. 

1. Please do not use beyond the rated input voltage and output current range.

2. Please pay attention to general heat dissipation when using. The shell will have a certain amount of heat during use, which is a normal phenomenon. When the temperature of the adapter is too high, please stop using it and check the reason.

3. Do not pinch the voltage source or power cord to prevent damage to the power supply.

It is strictly forbidden to use in high temperature or humid environment.

Q1. What specialized services are offered for the export of packaging and printed products?
A:Standard Packaging: 1. Each item is placed in an individual small white box; 2. Items are packed in appropriate quantities into export-grade cartons; 3. Cartons are secured with PP strapping or wrapped in PP woven plastic bags; 4. A packing list is affixed to the exterior.
Custom Packaging: 1. Packaging boxes can be customized according to client specifications, including design, colors, and logos. For example, for chargers, we can create custom internal blister trays with dedicated slots for the charger and its charging cable, which are then placed into a custom-printed color box; 2. These are subsequently packed into export-grade cartons; 3. Cartons are secured with PP strapping or wrapped in PP woven plastic bags (or left as-is, per client request); 4. A packing list is affixed to the exterior.

Q2. What are the factory's production capabilities?
A:Our factory possesses high-volume production capacity and is fully equipped with a comprehensive range of manufacturing machinery. Even for non-standard products or items not currently in stock, we can ensure delivery within 7–15 days.

Q3. What payment methods are available?
We accept Telegraphic Transfer (T/T), Western Union, Letter of Credit (L/C), and PayPal.

Q4. What are the advantages of the materials used in your products?
We use high-quality, safe, and eco-friendly materials. Furthermore, as the original manufacturer, we offer highly competitive pricing.

5. Do you accept small-batch orders?
Yes, we do.

6. Do you provide quick responses to inquiries?
Yes. We are available 24/7; you can reach us anytime via our website or WhatsApp. If you contact us via email, please note that there may occasionally be a delay of a few hours before we respond.

7. What if a client does not have their own freight forwarder?
We can recommend trusted international freight forwarders or courier services to handle the shipment; we will ensure the goods are delivered to the designated location.

Q1: How do you control the product defect rate? Is there a burn-in test before the products leave the factory?

✅ A: We implement end-to-end quality control, including Incoming Quality Control (IQC), in-process quality checks (IPQC), and electrical testing of semi-finished products. Every finished unit undergoes a 100% full-load burn-in test-simulating long-term, high-load operating conditions-to screen out early-life failures. This is followed by a final quality check (FQC) to ensure a low defect rate after shipment.

Q2: What is the temperature rise of the adapter when operating at full load? Will it overheat?

✅ A: We use high-quality components, ensuring that the temperature rise during full-load operation stays well within industry standards; the unit will not become excessively hot. We recommend maintaining a 20%–30% power margin during actual use, which enhances long-term operational stability and extends the power supply's lifespan.

Q3: How well is the ripple controlled? Will it cause flickering in the connected equipment?

✅ A: Thanks to an optimized PCB design, ripple is kept to a very low level. This makes the adapter ideal for power-sensitive devices-such as security cameras and displays-by minimizing issues like screen flickering or operational instability. Ripple levels are specifically tested before the product leaves the factory.

Q4: What built-in safety protections are included, and can they prevent damage to the connected equipment?

✅ A: The unit features a comprehensive suite of protections: Over-Voltage Protection (OVP), Over-Current Protection (OCP), Short-Circuit Protection (SCP), and Over-Temperature Protection (OTP). In the event of an anomaly, the power supply automatically cuts off the output, safeguarding both the adapter itself and the connected equipment.

Q5: Can it operate continuously, 24/7?

✅ A: This desktop adapter is of commercial grade and designed for long-term, continuous power delivery. It is well-suited for applications that require constant operation, such as security systems or industrial controls, as the components are specifically selected to withstand long-term, uninterrupted use.

Q6: What is the product's Mean Time Between Failures (MTBF)?

✅ A: When used within specified environmental conditions and without overloading, the unit achieves a high MTBF standard. We utilize high-temperature-resistant capacitors to ensure long-term reliability. Q7: Is a faint whistling sound during operation considered a quality issue?

✅ A: A faint, high-frequency sound from a switching power supply-which may occasionally occur when the load changes-falls within normal standard limits and is not considered a malfunction. However, if the noise is loud or accompanied by a burning smell, the unit is defective; such items are identified and removed during our factory inspection process.

Q8: Are the components traceable? Can you provide material composition reports?

✅ A: Yes, component batches are traceable. We can provide RoHS material compliance reports upon request to support your environmental material control requirements.

Q9: How are defective items handled if discovered upon receipt?

✅ A: If a defect is confirmed to be a result of our manufacturing quality, we will arrange for replacements or provide an appropriate after-sales solution. Specific warranty terms can be defined in the order contract.

Q10: Can the power supply operate stably in high or low-temperature environments?

✅ A: The units operate stably under standard room-temperature conditions. If your application involves extreme cold or high temperatures, please let us know in advance so we can adjust component selection and customize the design accordingly.

Q11: How precise is the output voltage, and is there a risk of voltage drift?

✅ A: We maintain strict control over voltage regulation precision. The output voltage remains stable even when the load changes, with minimal risk of voltage drift, ensuring a reliable power supply for your downstream equipment.

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