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31.5 inch flat black monitor on adjustable stand

Philips

Philips 32B1U3900 31.5" 4K VA USB-C monitor

SKU CH-NN2B-DDSXF

A 31.5" 4K VA panel with 3500:1 contrast, USB-C 90W charging and a built-in USB hub with RJ45

  • Screen size31.5 in (Viewable)
  • Display resolution3840 × 2160 (4K)
  • Panel typeVA
  • Pixel response time4 ms (Gray to Gray)
  • Image brightness350 cd/m2
  • Power drawECO mode: 20.4 W (typ.) Off mode: 0.3 W (typ.) On mode: 34.8
  • Sharp 4K detail on a 31.5 inch VA panel
  • 3500:1 contrast ratio for deep blacks
  • USB-C with 90W power delivery and integrated hub
  • 178 degree viewing angles for consistent colour
  • Ergonomic stand with height, pivot, swivel and tilt adjustment

31.5-inch 4K VA panel for colour-critical work

The Philips 32B1U3900 delivers a 31.5 inch viewable area at 3840 by 2160 resolution on a VA panel with 3500:1 static contrast. It covers sRGB 122% and NTSC 106% with 1.07 billion colours at 350 nits brightness, making it suitable for creative professionals and office users who need accurate colour reproduction.

Flat anti-glare screen

The flat panel uses an anti-glare coating with 3H hardness and 25% haze to reduce reflections. The stand provides 180 mm height adjustment, -5 to 25 degree tilt, +/-180 degree swivel and +/-90 degree pivot for flexible positioning. A single USB-C upstream port carries DisplayPort Alternate Mode video and up to 90 W power delivery while feeding four downstream USB-A ports, one supporting BC 1.2 fast charging, plus an integrated RJ45 Ethernet connection.

60 Hz ceiling and HDMI 2.0 bandwidth limit

The monitor accepts 4K signals at 60 Hz through DisplayPort 1.4, USB-C DP Alternate Mode or two HDMI 2.0 ports. HDMI 2.0 caps 4K at 60 Hz without HDR metadata support, so higher refresh rates or 10-bit HDR at full resolution are not possible. The 4 ms gray-to-gray response suits general productivity but may show motion blur in fast-paced gaming. VESA 100 x 100 mm mounting is available for arm or wall installation.

How it compares

Measured against everything we stock in Desktop PC Monitors, at today’s prices. Recalculated every night.

Price $263.99
Pricier than about 65% of the 530 comparable items (median $193.49).
Screen size 31.5 in (Viewable)
Higher than about 86% of the 479 comparable items (median 27 in).
Pixel response time 4 ms (Gray to Gray)
Lower than about 70% of the 368 comparable items (median 5 ms).

Specifications

Product
Brand namePHILIPS
Model name32B1U3900
Case colorBlack
Display
Screen size31.5 in (Viewable)
Display resolution3840 × 2160 (4K)
Panel typeVA
Pixel response time4 ms (Gray to Gray)
Image brightness350 cd/m2
Screen curvatureFlat Panel
Screen finishAnti-Glare, 3H, Haze 25%
Widescreen formatYes
Viewing angles178° (H) / 178° (V)
Pixel pitch0.18159 mm
Colors displayed1.07B (10 bits)
Contrast3500:1
Screen ratio16:9
Color gamut coveragesRGB 122%, NTSC 106 %
Audio & video
Integrated speakersYes
Ports & slots
Video connectors1 x DisplayPort 1.4 / 1 x USB-C (DP Alternative) / 2 x HDMI 2.0
USB connectionsUSB3.2, Gen1, 5G; upstream: USB-C x1 ;downstream: USB-A x4 (with x1 fast charge B.C 1.2)
Headphone jackAudio out
Power
Power drawECO mode: 20.4 W (typ.)
Off mode: 0.3 W (typ.)
On mode: 34.8 W (typ.)
Standby mode: 0.3 W (typ.)
Power supply100–240 VAC, 50/60 Hz
Size & build
Stand adjustabilityHeight adjustment: 180 mm
Pivot: -/+90°
Swivel: -/+180°
Tilt: -5/25°
VESA mounting pattern100 × 100 mm
Product dimensions24.84 in × 28.11 in × 11.02 in with stand
16.61 in × 28.11 in × 2.44 in without stand
Product weight25.29 lb with stand
16.67 lb without stand
Environment & compliance
Temperature rangeOperation 0 °C to 40 °C
Storage -20 °C to 60 °C
Humidity limits20%-80%

Questions about this item

Does the USB-C port with DP Alt Mode deliver 90 W charging while driving 4K at 60 Hz?

Yes, the single USB-C upstream port supports DisplayPort Alternate Mode and provides up to 90 W power delivery alongside 3840 x 2160 at 60 Hz.

What VESA pattern and stand clearance does the 31.5" chassis require?

The monitor uses a 100 x 100 mm VESA mount; the stand offers 180 mm height travel, -5 to 25° tilt, ±180° swivel and ±90° pivot.

How do you enable the integrated RJ45 Ethernet through the USB-C link, and what common step is missed?

Connect the USB-C cable to a host that supports DP Alt Mode and USB data; the hub then exposes the RJ45 port — the step often missed is ensuring the host USB-C port carries both video and data, not just power.

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