KD type 40W series

• Compact size and lightweight.

• High reliability and low price.

• Wide input voltage range.

• High conversion efficiency and low operating temperature rise.

• Built-in filter circuit, minimizing external radiated interference.

• Basic protection circuitry, providing good environmental adaptability.

• 4-hour, 100% full load aging and full-series functional testing.

Features
Model
Parameters

SKDD-

040-1E

SKDD-

040-1G

SKDD-

040-1F

SKDD-

040-1A

SKDD-

040-1H

SKDD-

040-1K

SKDD-

040-1I

SKDD-

040-1B

SKDD-

040-1J

SKDD-

040-1C

Rated Output Voltage

DC 3.3V

DC 5V

DC 7.5V

DC 10V

DC 12V

DC 15V

DC 18V

DC 24V

DC 36V

DC 48V

Output Interface Location

The five 10.0-M4 connectors are labeled OUTPUT: DC+; DC-.

Output Voltage Range

Setting error: <±2%; Adjustable range: ±10%

Rated Output Current

0～12A

0～8A

0～5.5A

0～4A

0～3.5A

0～2.8A

0～2.5A

0～1.8A

0～1.2A

0～900mA

Output Voltage Ripple

Vnor<0.1%Uout ；Vp-p100Hz<0.5%Uout；Vp-pmax<1%Uout

Li;Lo Regulation

Line:±0.5%；Load:±0.5%

Overall Voltage Regulation Accuracy

±1%

Rated Output Power

≈40W

≈40W

≈41W

≈40W

≈42W

≈42W

≈45W

≈45W

≈45W

≈45W

Rated Operating Efficiency

≈73%

≈75%

≈78%

≈80%

≈82%

≈83%

≈84%

≈84%

≈85%

≈85%

Rated Input Voltage

Rated voltage: AC85~265V, operating voltage: AC75~280V. Interface position: Five-position 10.0-M4 wiring port markings: INPUT: AC-L, AC-N, FG

Rated Input Current

Rated current: AC240mA~750mA, current range AC220mA～850mA

AC Input Frequency

Rated AC voltage frequency range 47～63Hz, sine wave

Inrush Current

The surge current to the power grid at the moment of power-on: the maximum value during cold start is 20A/10ms.

Input Overvoltage Protection

            Input allowable range: AC0～280V; Overvoltage protection point: AC300V±5V, power supply enters irreversible shutdown state.

Output Overload Protection

The overload protection point is approximately 120% of the rated output power, and the protection method is power limiting and voltage reduction; the short circuit protection method is online voltage reduction, and it can automatically resume operation.

Output Overvoltage Protection

------

Overheat protection

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Multi-unit series/parallel operation

Multiple power supplies of the same series are allowed to be used in series or parallel (parallel use may result in uneven current distribution).

Power supply timing parameters

Setup time ≈ 200ms; Settlement time ≈ 50ms; Hold-up time ≈ 20ms

Isolation voltage parameters

[Input-Output: AC1.5KV, Input-Casing: AC1.5KV, Output-Casing: AC0.5KV] 50Hz, Power-on for 1 minute: Leakage current <5mA

Operating temperature parameters

The operating temperature drift coefficient is approximately ±0.05% [℃]; the absolute temperature rise coefficient is approximately 0.4 ± 10% [℃/W]; when the operating output is at rated power, the absolute temperature rise of the machine body is 20℃ ± 5℃.

Environmental conditions parameters

Storage environment: -20℃ to +85℃; 10% to 95%RH. Operating environment: -10℃ to +50℃; 20% to 90%RH. (Varies depending on the operating environment and power consumption)

Cooling method

Designed for continuous operation with natural cooling (power consumption is affected by the operating environment and installation location).

External dimensions and mounting dimensions

Specifications: L100×W83×H37mm3; Maximum size: L100×W85×H38mm3; Installation size: L56×W24(33)mm2, L121×W0mm2

Net weight and color

The total weight is approximately 350g; the bottom shell is made of 1.5mm thick aluminum with a polished and anodized silver finish; the top shell is made of 0.8mm thick iron with a nickel-plated silver finish.

Design standards

National Standards GB-4943 and GB-9254

Note: 1) All the above test indicators were measured under the following conditions: within the rated input voltage and rated output load range, the environment was 25℃, 85%RH, and there was no wind.

2) Output DC voltage ripple test: A parallel stranded wire with a length of 30cm and a cross-section of 1mm², with 0.1μF and 0.47μF capacitors connected to one end, was bypassed at the test point. The maximum peak-to-peak value of the main frequency ripple Vp-p100Hz and the maximum peak-to-peak value of the combined ripple Vp-pmax were measured respectively.

3) Li voltage regulation rate: When the load is at the rated value, the input voltage varies within the rated range; Lo load regulation rate: When the input is at the rated voltage value, the load varies from zero to the rated value.