KJ series 120W dual output

• 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

SKJA-120-2F

SKJA-120-2K

Rated Output Voltage

            DC1  +24V    DC2  +12V

DC1  +24V   DC2  +5V

Output Interface Location

　The seven 9.5-7P wiring ports are labeled OUTPUT: DC+; DC-.

Output Voltage Range

Setting error < ±5% Setting error < ±10%

Setting error < ±5% Setting error < ±10%

Rated Output Current

Rated current 4A Current range 0.5-4A

Rated current 3A Current range 0.5-3A

Rated current 5A Current range 0.5-5A

Rated current 3A Current range 0.5-3A

Output Voltage Ripple

Vnor＜50mv  Vp_p100Hz＜75mv  VP-Pmax＜250mv Vnor＜50mv  Vp_p100Hz＜120mv  VP-Pmax＜180mv

Vnor＜50mv  Vp_p100Hz＜75mv  VP-Pmax＜250mv Vnor＜50mv  Vp_p100Hz＜120mv  VP-Pmax＜180mv

Li;Lo Regulation

Line: ±0.5%    Load: ±4%

Line: ±0.5%    Load: ±8%

Overall Voltage Regulation Accuracy

±5% ±10%

±5% ±10%

Rated Output Power

120W

Rated Operating Efficiency

≈70%

Rated Input Voltage

Rated voltage: AC220V±15%, Operating voltage: AC220V±30%. Interface position: Seven-position 9.5-7-position wiring port markings: INPUT: AC-L, AC-N, FG

Rated Input Current

Rated current: AC 1.0A, current range AC 0.6A～1.5A

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

Rated civil voltage 220V±15% interface location

Output Overload Protection

The overload protection point is approximately 120% 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 Overvoltage Protection

The undervoltage protection point is approximately AC150V±5V, at which point the power supply enters a recoverable (reset input) shutdown state. The overvoltage protection point is approximately AC300V±5V, at which point the power supply enters an unrecoverable shutdown state.

Overheat protection

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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 ±0.03 [%/℃]; the absolute temperature rise coefficient is approximately 0.3 [℃/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 size: L150×W85(33)mm2, L149×W10mm2

Net weight and color

The total weight is approximately 500g; the bottom shell is made of 2.0mm thick aluminum with a polished 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.