1-10Pcs AC-DC 3.3V/5V/12V Precision Buck Converter AC220v toDC 3.3V/5V/12V DC step down Transformer power supply module 1A 12W
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Specifications
- Brand Name
- Stlxy
- Origin
- Mainland China
- Type
- Power Supply
- High-concerned chemical
- None
- Rated Capacity
- 40-1000VA（include40VA）
- Output Type
- SINGLE
- Output Current
- 0-5A
- Model Number
- AC-DC
- Output Power
- 1 - 50W
- is_customized
- Yes
- Certification
- NONE
- Choice
- yes
- semi_Choice
- yes
Product Description
5V700mA
Product Features
1. Output indicator: green
2. Full load power: <4W
3. No-load power: <0.05W
4. Working temperature: -20~70
5. Test resistance: 7 ohms (4.9V) for 5V
6. Output power: 3.5W,efficiency is about 80%
7. Input voltage range: AC50V-277V DC70V-390V
8. Output current: 5VmA-700mA,enters constant current mode when fully loaded
9. Output protection: overvoltage,overcurrent,overtemperature,short circuit protection,etc.
10. Output characteristics: Multiple voltage modules can be used in parallel to meet the needs of small current and large current
11. Output voltage: 5V+-0.15v no load and full load,light load minus 0.1V,rebound when heavy load,50% load ripple 60mV
12. Capacitance temperature is 105° 10,000 hours,more than 5 years at 70°,and about 20-50 years at room temperature (not recommended for use above 70°).
Product Size
12V300mA
Product Features
1. Output indicator: green
2. No-load power: <0.05W
3. Full load power: <4W
4. Working temperature: -20~70
5. Test resistance: 40 ohms (12V) for 12V
6. Output power: 3.5W,efficiency is about 80%
7. Input voltage range: AC50V-277V DC70V-390V
8. Output current: 12VmA-300mA,enters constant current mode when fully loaded
9. Output protection: overvoltage,overcurrent,overtemperature,short circuit protection,etc.
10. Output characteristics: Multiple voltage modules can be used in parallel to meet the needs of small current and large current
11. Output voltage: 12V-0.05v+0.3v no load and full load,light load minus 0.1V,rebound when heavy load,50% load ripple 100mV
12. Capacitance temperature is 105° 10,000 hours,more than 5 years at 70°,and about 20-50 years at room temperature (not recommended for use above 70°).
Product Size
3.3V 700MA
Input voltage: Ac85-265V 50/60HZ or DC100v-370v
Output voltage: Dc3.3V (+0.2V)
Output current: 700 mA
Power: 3.5W
Small Current: Limit 0 A
High Current: Limit 700 mA
Peak current: 800 mA
Output Voltage Range 3.1-3.5V
Ripple: 60mV
5V 700mA:
Step Down Module
Condition: New
With temperature protection,over current protection and short circuit protection,high and low voltage isolation,AC85 ~ 265 v wide voltage input,ac/dc current,431 precision voltage stability DC5V output
Input voltage: AC 85 ~ 265 v 50/60 hz or DC 100~ 370 v
Imput current: 0.0273A(AC110V) 0.014A(AC220V)
Input Inrush Current: 20A
Output voltage: DC 5V (+ / - 0.2 V)
Output current 700 mA
Power 3.5 W
Operating temperature -20~60°
Relative humidity 40-90%RH
Output 5V,min current 0a,max current 700mA,peak current: 800mA,output range: 4.8~5.2v,ripple wave: 60mV
Output power:0-4W(DC current)
Output efficiency: 80%
Switch machine overshoot: MAX 10%
Output voltage rise time: MAX 100MS
Output over voltage: 4.8-5.2V,recovery:Lock,restart after recovery
Output over power protection:YES,recovery:Lock,restart after recovery
Short-circuit protection: YES,automatic recovery after problem solved
Temperature protection: YES,recovery:Lock,restart after recovery
Overcurrent protection: YES,recovery:Lock,restart after recovery
Size: 29.89 x 20.57 x18mm12V 450mA：
-The power supply for whole isolation type industrial-grade built-in power supply module,temperature protection,over current protection and short circuit protection,AC 85 ~ 265v wide voltage input,431 precision voltage,DC12V output,small size,stable performance,cost-effective
-input voltage of AC85 ~ 265v 50/60 HZ
-Output voltage DC12V (±0.1V)
-Output current 450MA
-Power 5W
Pros & Cons
Pros
- Versatile AC220V to 3.3V/5V/12V DC conversion up to 1A/12W.
- Wide input range AC50-277V/DC70-390V for global use.
- Low no-load power <0.05W, efficiency 80%, with output indicator.
- Customizable 1-10pcs, compact for DIY projects.
Cons
- No certification like CE, potential safety concerns.
- Limited to 1A output, not for high-power needs.
- Working temp -20~70°C may limit extreme environments.
- Test resistance specific, may need verification.
Common Questions
What input/output specs for the AC-DC buck converter?
AC220V to DC 3.3V/5V/12V, up to 1A 12W output.
What is the size and mounting of the power supply module?
Compact precision buck converter module, 1-10pcs packs.
Is the transformer compatible with various voltages?
Input AC50V-277V/DC70V-390V, single output customizable.
How to use the AC-DC step-down power supply?
Connect input, green LED indicates output; efficiency ~80%.
What shipping and certification for the buck converter?
Ships from Mainland China; no certification listed.
Product information last updated on December 9, 2025