Product Datasheet
20 May 2026
Panel PC / Monitor / Mobile · Industrial-Panel-PC
SID-21W04
Series: SID
The Avalue SID-21W04 is a 21.5" Full-HD semi-industrial touch panel PC built on the low-power Intel Celeron J3455 processor, designed as a rugged, fanless terminal for self-service kiosks, signage, and light HMI. With a DDR3L SO-DIMM (4GB, 8GB BOM option), 32GB eMMC, and an M.2 B-Key for an SSD or LTE module, it runs Windows 10 or Ubuntu 20.04 in an aluminium-extrusion front / metal-sheet rear enclosure with an IP65 front. The 1920x1080 true-flat PCAP 10-point multi-touch panel pairs with Realtek Gigabit LAN, 2x USB 3.0, a headphone jack, RS-232 and RS-485 (DB9) COM ports, HDMI 1.4b, and optional Wi-Fi/BT 5.0. A wide +12~24V lockable DC input and fanless operation make the SID-21W04 a durable, low-maintenance large-format interactive display.
Key Features
- 21.5" Full-HD (1920x1080) TFT true-flat PCAP 10-point multi-touch panel PC, fanless
- Intel Celeron Processor J3455
- 1 x 204-pin SO-DIMM DDR3L 4GB (8GB BOM option)
- 32GB eMMC + M.2 B-Key (SSD/LTE) + Micro-SIM + Micro-SD
- Realtek RTL8211FI Gigabit LAN, 2x USB 3.0
- RS-232 + RS-485 (DB9), HDMI 1.4b
- Optional Wi-Fi 802.11ac / BT 5.0
- Aluminium-extrusion front / metal-sheet rear, front panel IP65
- Wide +12 ~ +24V lockable DC input, fanless; CE / FCC Class B / RED
Technical Specifications
System Information
| Processor | Intel® Celeron® Processor J3455 |
|---|---|
| System Memory | 1 x 204 pin SO-DIMM DDR3L 4GB (8GB for BOM Option) |
Storage
| Storage | 32GB eMMC |
|---|---|
| Other Storage Device | 1 x Micro SD Slot |
Display
| Graphic Chipset | Intel® HD Graphics 500 |
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Audio
| Speaker Output | 2 x 4Ω 2W (Optional) |
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Ethernet
| LAN Chipset | Realtek RTL8211FI-CG |
|---|---|
| Ethernet Interface | 10/100/1000 Base-Tx GbE compatible |
Power Requirement
| DC Input | +12V ~ +24V |
|---|---|
| DC Input Connector | Lockable DC Jack |
| Adapter | Input: 100~240 Vac/50~60 Hz Output: 60W Adapter (12V @ 5A Adapter) |
Software Support
| OS | Windows 10 / Ubuntu 20.04 |
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Certification
| Certification Information | CE, FCC Class B, RED |
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Panel
| LCD Size | 21.5" |
|---|---|
| LCD Panel | TFT |
| Resolution | 1920 x 1080 |
| Pixel pitch | 0.24795 (H) x 0.24795 (V) mm |
| Luminance | 250 cd/m² |
| Contrast ratio | 3000 |
| Viewing angle | 89 (U), 89 (D), 89 (L), 89 (R) |
| Response time | 30 ms |
| Backlight | LED |
| Touch Type | Projective capacitive multi-touch up to 10 points |
| Touch Light Transmission | 86% |
External I/O
| USB Port | 2 x USB 3.0 |
|---|---|
| Audio Port | 1 x Headphone Jack |
| LAN Port | 1 x RJ45 |
| Wireless LAN Antenna | 2 x Wi-Fi Antenna |
| COM Port | 1 x RS-232 (DB9), 1 x RS-485 (DB9) |
| HDMI | 1 x HDMI 1.4b |
| Switch | 1 x Power Button, 1 x Reset Button |
| DC input | 1 x DC Jack |
| LED indicator | 1 x Power LED |
Internal I/O
| Expansion | 1 x M.2 Key B (3042, SATA3 / USB 2.0, support SSD/LTE Module) |
|---|---|
| SIM Slot | 1 x Micro SIM Slot |
Wireless Communication
| WLAN | Optional Wi-Fi 802.11ac/a/b/g/n |
|---|---|
| Bluetooth | Optional BT 5.0 |
Mechanical & Environmental
| Operating Temp. | 0°C ~ 40°C (32°F ~ 104°F) |
|---|---|
| Storage Temp. | -20°C ~ 60°C (-4°F ~ 140°F) |
| Operating Humidity | 40°C @ 95% Relative Humidity, Non-condensing |
| Dimension (W x L x H) | 535.3 x 329.3 x 56.6mm |
| Weight | 8.7 kg |
| IP Rating | Front panel IP65 |
| VESA | 100 x 100 |
| Power Requirement | DC +12 ~ +24V |
| System Fan | Fanless |
| Construction - Front | Aluminum extrusion with cover lens |
| Construction - Rear | Metal sheet |
Ordering Information
| Ordering Information | SID-21W04-3411-A1R : SID-21W04 4GB, 32GB / Win 10, SID-21W04-3410-A1R : SID-21W04 4GB, 32GB / Ubuntu 20.04 |
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