High-efficiency K18N-UP200 Series 201.6W switching power supply with 48VDC output, 4.2A rated current, 0–4.2A output range, and a slim 127 × 82 × 45mm enclosure. With 90–264VAC universal AC input, built-in active PFC, efficiency above 88%, ±10% voltage adjustment, and full protection against short circuit, overload, over-voltage, and over-temperature, it is ideal for industrial control, automation systems, and compact embedded power applications.

Input Current

1.2A @ 220V AC

Rated Input Voltage

90-264V AC

Output Rated Current

4.2A

Output Voltage

+48V

Rated Power

201.6W

Output Adjustable Range

±10%

Output Accuracy

±1%

Efficiency @220Vac

＞88%

Size/Weight

127*82*45mm(L*W*H)/0.6Kg

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Description

30-Second Fit Check

Output class: 48VDC, 4.2A (201.6W).
AC input: 90–264VAC, 47–63Hz.
Active PFC: PF listed >0.99 @110V / >0.95 @220V.
Efficiency: listed >88% @220VAC.
Ripple & noise: 480mVp-p.
Mechanical: 127×82×45mm open-frame (0.6kg).

What It Is + Why It Matters

Compact 48V, ~200W switching power supply for equipment-level 48V rails.
Active PFC and universal input are listed for the series—helpful when equipment is deployed across different AC mains.
±10% trim gives controlled margin for line drop or setpoint tuning (within system constraints).

Key Specs

Rated output: 48V, 4.2A; 201.6W.
Ripple & noise: 480mVp-p.
DC voltage adjust: ±10%.
Over-voltage threshold (listed): 55–60V.
Regulation: tolerance ±1%; line ±0.5%; load ±0.5%.
Timing (listed): setup/rise/hold 500ms, 50ms, 20ms.
Inrush/leakage: 20A/115V, 40A/230V cold start; <0.75mA @240VAC.
Operating environment: -20 to 50°C; 10–90% RH (non-condensing).

Integration & Controls

Open-frame design: confirm protective earthing, spacing, and airflow in the end product.
Mechanical integration: verify mounting holes and keep-out areas using the outline drawing.
Trim use: apply ±10% adjustment only within your equipment design and safety margins.

Best For / Not For

Best for: 48V industrial control rails, automation subsystems, equipment-level DC distribution within ~200W.
Not for: ripple-sensitive loads that cannot tolerate 480mVp-p, or sealed installs without thermal design.
Not for: requirements not stated (digital comms, redundancy, remote sense).

Typical Applications

Industrial control and automation systems
Equipment-level 48V DC rails
Panel builds with universal-input requirement
Factory fixtures and test stations

Selection Checklist

Confirm load stays within 4.2A / 201.6W with peak headroom.
Verify input: 90–264VAC, 47–63Hz.
Confirm ripple tolerance: 480mVp-p.
Plan airflow and spacing for open-frame integration.
Confirm your required safety/EMC documentation matches what’s listed in the datasheet.

RFQ Quick Checklist: qty, target ship date, AC mains, downstream 48V loads, installation constraints, documentation needs.
Note: final compliance and performance depend on end-product design and verification testing.

Protections & Standards

Protections listed: short circuit, overload, over-voltage, over-temperature.
Overload (detailed): 110–200% hiccup, auto recover.
Safety standards listed: EN 62368-1, EN 60950-1, GB 4943.
EMC standards listed: EN 55015, EN 61000-3-2, EN 61000-3-3.
Isolation / dielectric (listed): I/P–O/P 3kVAC; I/P–FG 1.5kVAC; O/P–FG 700VDC.