K4 500W 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

SK4B-500-1B

SK4B-500-1H

SK4B-500-1C

Rated Output Voltage

DC24V

DC12V

DC48V

Output Interface Location

The seven 9.5-M4 connectors are labeled OUTPUT: DC+; DC-.

Output Voltage Range

Setting error: <±1%; Adjustable range: ±10%

Rated Output Current

0～22A

0～42A

0～12A

Output Voltage Ripple

Vnor<20mV ；Vp-p100Hz<100mVp-p；Vp-pmax<200mVp-p

Li;Lo Regulation

Line:±0.5%；Load:±0.5%

Overall Voltage Regulation Accuracy

±3%

Rated Output Power

≈500W

Rated Operating Efficiency

≈80%

Rated Input Voltage

Rated voltage: AC220/110V±15%, Operating voltage: AC220/110V±30%. Interface position: Seven-pin 9.5-M4 interface, labeled AC-L, AC-N, FG.

Rated Input Current

Rated current: AC220V: AC2.5A, current range AC2.2A～3.5A;

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 55A/10ms.

Output Overload Protection

The overload protection point is approximately 108% 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 10% of the rated output voltage. The protection is an online voltage drop shutdown mode; recovery requires resetting the input.

Overheat protection

Overheat protection occurs when the casing temperature exceeds approximately 85±3℃, and the protection method is an online voltage drop shutdown. Automatic recovery occurs when the casing temperature falls below approximately 65±3℃.

Multi-unit series/parallel operation

Multiple units of the same power supply series can be used in series, but current distribution is not guaranteed.

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 0.13 ± 10% [℃/W]; when the operating output is at rated power, the absolute temperature rise of the machine body is 35℃ ± 5℃.

Environmental conditions parameters

Storage environment: -20℃ to +85℃; 10% to 95%RH. Operating environment: -10℃ to +40℃; 20% to 90%RH. (Varies depending on the operating environment and power consumption)

Cooling method

Designed for continuous operation, with air cooling (power consumption may vary depending on the operating environment and installation location).

External dimensions and mounting dimensions

Maximum dimensions: L280×W120×H50mm³;

Net weight and color

The total weight is approximately 1700g; 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.