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LRS-75 75W Single Output Switching Power Supply
LRS-75 is a 75W single-output switching power supply designed for applications requiring stable regulated DC power. It supports a universal 85–264VAC input range and provides 5V, 12V, 15V, 24V, 36V and 48V DC output options.
The LRS-75 uses free-air convection cooling and incorporates short-circuit, overload and over-voltage protection. It is designed for reliable operation with an operating temperature range of -30°C to +70°C.
Key Specification Line
75W | 85–264VAC Input | 5–48VDC Output | Free-Air Convection | -30°C to +70°C
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Product Detail
The LEYU LRS-75 is a 75W single-output switching power supply that converts AC input power into regulated DC output power.
The LRS-75 series supports a universal 85–264VAC input range and provides six DC output voltage options: 5V, 12V, 15V, 24V, 36V and 48V.
The power supply uses free-air convection cooling, includes an LED power indicator and provides built-in protection functions for short circuit, overload and over voltage.
With an operating temperature range of -30°C to +70°C, the LRS-75 is designed for reliable operation in a range of electrical and electronic equipment.
LRS-75 Key Features1. Universal AC Input
The LRS-75 supports a wide 85–264VAC input range, providing flexibility for different AC input conditions.
2. Multiple DC Output Options
The series is available with six output voltage options:
5V / 12V / 15V / 24V / 36V / 48V DC
3. Free-Air Convection Cooling
The LRS-75 uses free-air convection cooling, eliminating the need for a built-in cooling fan.
4. Built-In Protection
The power supply provides protection functions including:
- Short circuit
- Overload
- Over voltage
5. 300VAC Surge Input Capability
The LRS-75 can withstand a 300VAC surge input for 5 seconds under the specified conditions.
6. LED Power Indicator
An LED indicator provides a visual indication when the power supply is operating.
7. 100% Full-Load Burn-In Test
The LRS-75 is subjected to a 100% full-load burn-in test as part of its production testing process.
8. Wide Operating Temperature
The specified working temperature range is:
-30°C to +70°C
9. High Efficiency
Depending on the output model, the typical efficiency reaches up to 91.5%.
10. Reliability and Warranty
The LRS-75 is designed for high efficiency, long service life and reliability, with a 2-year warranty. \
Technical Specifications
SPECIFICATION
OUTPUT
Model
LRS-75-5
LRS-75-12
LRS-75-15
LRS-75-24
LRS-75-36
LRS-75-48
DC Voltage
5V
12V
15V
24V
36V
48V
Rated Current
14A
6A
5A
3.2A
2.1A
1.6A
Current Range
0~14A
0~6A
0~5A
0~3.2A
0~2.1A
0~1.6A
Rated Power
70W
72W
75W
76.8W
75.6W
76.8W
Ripple&Noise
100mVp-p
120mVp-p
120mVp-p
150mVp-p
200mVp-p
200mVp-p
VoltageAdj. Range
4.5 ~ 5.5V
10.2~ 13.8V
13.5~18V
21.6~28.8V
32.4~39.6V
43.2~52.8V
Voltage Tolerance
±2.0%
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
Line Regulation
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
Load Regulation
±1.0%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
Setup,Rise Time
500ms, 30ms/230VAC 500ms, 30ms/115VAC at full load
Hold Up Time
60ms/230VAC 12ms/115VAC at full load
INPUT
Voltage Range
85 ~ 264VAC 120 ~ 373VDC
Frequency Range
47 ~ 63Hz
Efficiency
86.5%
89%
89%
90%
91.5%
91.5%
AC Current
1.4A/115VAC 0.85A/230VAC
Inrush Current
Cold start 50A/230VAC
Leakage Current
<0.75mA / 240VAC
PROTECTION
Over Load
110 ~ 150% rated output power
Protection type: Hiccup mode, recovers automatically after fault condition is removed
Over Voltage
5.75~6.75V
13.8~16.2V
18.75~21.75V
28.8~33.6V
41.4~48.6V
55.2~64.8V
Protection type: shut down o/p voltage, re-power on to recover
ENVIRONMENT
Working Temp.
-30 ~ +70℃ (Refer to “derating curve”)
Working Humidity
20 ~ 90% RH non-condensing
StorageTemp., Humidity
-40 ~ +85℃, 10 ~ 95% RH
Temp. Coefficient
±0.03%/℃ (0 ~ 50℃)
Vibration
10 ~ 500Hz, 5G 10min./1cycle, 60min. each along X, Y, Z axes
SAFETY &EMC
Safety Standards
UL60950-1, TUV EN60950-1, EN60335-1/-2-16, CCC GB4943 approved
Withstand Voltage
I/P-O/P:3.75KVAC I/P-FG:2KVAC O/P-FG:1.25KVAC
Isolation Resistance
I/P-O/P, I/P-FG, O/P-FG:100M Ohms / 500VDC / 25℃ / 70% RH
EMC Emission
Compliance to EN55022(CISPR22), GB9254 CLASS B, EN55014 EN 61000-3-2,-3
EMC Immunity
Compliance to EN61000-4-2,3,4,5,6,8,11, EN61000-6-2(EN50082-2), heavy industry level, criteria A
OTHERS
Dimension
99*82*30mm (L*W*H)
Weight
0.3Kg
Packing
45pcs/carton/14.5kg/0.77CUFT
NOTE
1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25℃ of ambient temperature.
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12” twisted pair-wire terminated with a 0.1uf & 47uf parallel capacitor.
3. Tolerance: includes set up tolerance, line regulation and load regulation.
4. Line regulation is measured from low line to high line at rated load.
5. Load regulation is measured from 0% to 100% rated load.
6. The power supply is considered a component which will be installed into a final equipment. The final equipment must be re-confirmed that it still meetsEMC directives.
7. Length of set up time is measured at cold first start. Turning ON/OFF the power supply very quickly may lead to increase of the set up time.
The LRS-75 incorporates protection functions designed to help protect the power supply and connected equipment during abnormal operating conditions.
Overload Protection
The overload protection operates at approximately:
110–150% of rated output power
Protection Type: Hiccup mode, with automatic recovery after the fault condition is removed.
Over-Voltage Protection
The over-voltage protection thresholds vary according to the output model.
Protection Type: Output voltage shuts down; re-power on is required for recovery.
Short-Circuit Protection
The LRS-75 includes short-circuit protection. The specification indicates output shutdown with recovery after the fault condition is removed.
Surge Input
The LRS-75 can withstand a 300VAC surge input for 5 seconds under the specified conditions.
ApplicationsLRS-75 Applications
The compact size, wide AC input range and multiple DC output options make the LRS-75 suitable for a variety of industrial and electronic applications.
Typical Applications
Industrial Automation
Power supply for industrial control equipment, automation devices and related electrical systems.
Control Systems
Provides regulated DC power for control equipment and electrical control systems.
LED Equipment
Suitable for DC power requirements in LED-related equipment when the required voltage and power are within the model specifications.
Instrumentation
Can be used as a DC power source for electronic instruments and measurement-related equipment.
Electronic Equipment
Suitable for electronic equipment requiring a regulated low-voltage DC power source.
Electrical Cabinets
The low-profile enclosure helps save internal installation space in electrical cabinets and equipment.
FAQ LRS-75 Frequently Asked QuestionsWhat is the LRS-75?
The LRS-75 is a 75W class single-output switching power supply with multiple DC output voltage options.
What input voltage does the LRS-75 support?
The LRS-75 supports 85–264VAC input and 120–373VDC input.
What output voltages are available for the LRS-75?
The LRS-75 is available in:
5V, 12V, 15V, 24V, 36V and 48V DC
versions.
What is the rated power of the LRS-75?
Depending on the model, the rated output power ranges from 70W to 76.8W, while the series is designated as the LRS-75 75W class.
Is the LRS-75 fanless?
The specification states that the LRS-75 uses free-air convection cooling.
What is the efficiency of the LRS-75?
Typical efficiency ranges from 86.5% to 91.5%, depending on the output model.
What protections does the LRS-75 provide?
The LRS-75 provides:
- Short-circuit protection
- Overload protection
- Over-voltage protection
What is the operating temperature of the LRS-75?
The specified working temperature is:
-30°C to +70°C
What are the dimensions of the LRS-75?
The LRS-75 measures:
99 × 82 × 30 mm
How do I choose the correct LRS-75 model?
Select the model according to the required DC output voltage and current.
For example:
24V / 3A → LRS-75-24
48V / 1A → LRS-75-48
Does the LRS-75 have overload protection?
Yes. The overload protection operates at approximately 110–150% of rated output power and uses hiccup mode with automatic recovery after the fault condition is removed.
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