KJ type 120W 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.

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

Features
Model
Parameters

SKJA-

120-1E

SKJA-

120-1G

SKJA-

120-1F

SKJA-

120-1A

SKJA-

120-1H

SKJA-

120-1K

SKJA-

120-1I

SKJA-

120-1B

SKJA-

120-1J

SKJA-

120-1C

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

Output Voltage Range

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

Rated Output Current

0～35A

0～25A

0～16A

0～12A

0～10A

0～8.2A

0～7A

0～5.2A

0～3.5A

0～2.8A

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

≈115W

≈125W

≈120W

≈120W

≈120W

≈123W

≈126W

≈125W

≈126W

≈135W

Rated Operating Efficiency

≈80%

≈85%

≈85%

≈86%

≈86%

≈87%

≈87%

≈88%

≈89%

≈90%

Rated Input Voltage

Rated voltage: AC220V±15%, Operating voltage: AC220V±30%. Interface position: Seven-position 10.0-M4 wiring port markings: INPUT: AC-L, AC-N, FG

Rated Input Current

Rated current: AC 0.75A, current range AC 0.6A～1.1A

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

Undervoltage protection at AC150V±5V: power supply enters a recoverable (reset input) shutdown state; Overvoltage protection at AC300V±5V: power supply enters an unrecoverable shutdown state.

Output Overload Protection

The overload protection point is approximately 110% of the rated output current, and the protection is a current-limiting and voltage-reducing method; the short-circuit protection is an online voltage-drop shutdown method, and the input needs to be reset to restore it.

Output undervoltage protection

The undervoltage protection point is approximately 40% of the rated output voltage. The protection is an online voltage drop shutdown mode; recovery requires resetting the input.

Overheat protection

------

Multi-unit series/parallel operation

Multiple units of the same power supply series can be used in series.

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 0.16 ± 10% [℃/W]; when the operating output is at rated power, the absolute temperature rise of the machine body is 25℃ ± 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: L159×W98×H47mm³; Maximum size: L160×W100×H48mm³; Installation dimensions: L150×W85mm², L149×W10mm²

Net weight and color

The total weight is approximately 500g; the bottom shell is made of 2mm 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.