TPC-SD8441B-B25Z56 - is a PTZ thermal camera from the Ultra series designed for advanced perimeter protection and critical infrastructure monitoring. It integrates a 400 × 300 VOx thermal sensor with 25 mm thermal lens and a 4 MP visible camera with 6-336 mm lens and powerful 56x optical zoom , ensuring detailed images and accurate long-distance detection. Advanced Artificial Intelligence functions include heat source detection, smoke , human/vehicle classification, boat detection , engineering truck detection and automatic tracking. Thanks to 360° PTZ , two-way audio , IR illumination up to 150 meters , automatic wiper with rain sensor and IP66 protection, it offers high performance even in the most difficult environments. Dahua
TPC-SD8441B-B25Z56 | POE PTZ THERMAL IP CAMERA WITH 6-336mm VARIFOCAL LENS - 25mm THERMAL LENS - 4 MEGAPIXELS - ARTIFICIAL INTELLIGENCE - TWO-WAY AUDIO - SMOKE AND HEAT DETECTION

The Dahua TPC-SD8441B-B25Z56 is a PTZ thermal camera from the Ultra series designed for advanced perimeter protection and critical infrastructure monitoring. It combines a 400 × 300 VOx thermal sensor with a 25 mm thermal lens and a 4 MP visible camera with a 6-336 mm lens and powerful 56x optical zoom , ensuring high-precision images even at long distances. Advanced Artificial Intelligence functions include smoke detection, heat source detection, human/vehicle classification, boat detection , engineering truck detection and automatic target tracking. 360° PTZ , two-way audio , IR illumination up to 150 meters , automatic wiper with rain sensor and IP66 protection complete the features, ideal for professional applications in complex outdoor environments.
Main specifications:
- 400×300 VOx thermal sensor
- 4 MP CMOS optical sensor
- 25mm thermal optics
- Visible optics 6-336 mm
- 56x optical zoom
- AI with smoke and heat detection
- Man/vehicle classification
- Two-way audio
- PTZ 360°
- IR illumination 150 m
- IP66 protection
Further details
The visible camera integrates a 6-336 mm motorized lens with a powerful 56x optical zoom , allowing monitoring of very large areas and precise identification of people, vehicles and critical details even at great distances.
The TPC-SD8441B-B25Z56 model is equipped with a 25mm thermal optic , designed for perimeter security and advanced thermal detection applications, with the ability to detect heat sources up to 1,500 meters .
✅ Two-way audio:
Technical data sheet
| TPC-SD8441B-B25Z56 | |
| Thermal | |
| Detector Type | Vanadium oxide uncooled focal plane detector |
| Effective Pixels | 400 (H) × 300 (V) |
| Pixel Pitch | 12 μm |
| Spectral Range | 8 μm–14 μm |
| Sensitivity (NETD) | <35 mk="" f="" 1="" 0="" td=""> |
| Focal Length | 25 mm |
| Field of View | H: 11.0°; V: 8.2° |
| Thermal Focus Control | Fixed-focal |
| Digital Detail Enhancement (DDE) | Yes |
| Digital Zoom | 19 levels |
| Thermal AGC | Auto/Manual |
| Thermal Noise Reduction | 2D NR/3D NR |
| Image Flip | 180°; Mirror |
| Color Palettes | 18 (white hot/black hot/fusion/rainbow/golden autumn/midday/iron red/amber/jade/sunset/icefire/painting/pomegranate/emerald /spring/summer/autumn/winter) |
| Visible | |
| Image Sensor | 1/2.8" CMOS |
| Max. Resolution | 2688 (H) × 1520 (V) |
| Pixel | 4 MP |
| Horizontal Definition |
Center ≥ 1200 TVL |
| Min. Illumination | Color: 0.01 lux Black & white: 0.001 lux 0 lux (white light on) |
| Visible AGC | Auto/Manual |
| Visible Noise Reduction | 2D NR/3D NR |
| S/N Ratio | >55 dB |
| White Balance | Car; manual; indoor; outdoor; tracking; sodium lamp; street lamp; natural |
| Defog | Electronic defog |
| Electronic Shutter Speed | 1 s–1/30,000 s (auto/manual) |
| BLC | Yes |
| WDR | Yes |
| HLC | Yes |
| Day/Night | Auto (ICR); Color; B/W |
| Iris Control | Car |
| Image Flip | Yes |
| Exposure Compensation | Yes |
| Visible Focus Control | Auto/Semi-auto/Manual |
| Focal Length | 6 mm–336 mm |
| Zoom Speed | <8.8 s |
| Field of View | H: 64.4°–1.28° V: 38.37°–0.72° |
| Close Focus Distance | 1 m–10 m (3.28 ft–32.81 ft) |
| Optical Zoom | 56× |
| Openings | F1.5–F5.3 |
| Illuminator On/Off Control | Auto; manual |
| Illumination Distance | 150 m (492.13 ft) |
| Audio and Video | |
| Video Compression | H.265; H.264M; H.264H; H.264B |
| Video Compression | Surge protection: 6 kV Air discharge: 15 kV Contact discharge: 8 kV |
| Structure | |
| Product Dimensions | 300 mm × 300 mm × 500 mm (11.81" × 11.81" × 19.69") (L × W × H) |
| Packaging Dimensions | 435 mm × 435 mm × 666 mm (17.13" × 17.13" × 26.22") (L × W × H) |
| Net Weight | ≤13 kg (28.66 lb) |
| Gross Weight | ≤16 kg (35.27 lb) |


