TPC-SD5641-TB25Z45 - is a professional PTZ thermal camera designed for advanced perimeter protection and critical infrastructure monitoring. It integrates a 640×512 VOx thermal sensor with 25mm thermal lens and a 4MP visible camera with 45x optical zoom and 3.95-177.75mm lens, offering detailed images and long-distance detection capabilities. Artificial Intelligence functions include intrusion detection, tripwire, human/vehicle classification, heat source detection and automatic target tracking. Thanks to the fusion of thermal and visible images , two-way audio , IR illumination up to 100m , Hi-PoE support and IP66 protection, it guarantees reliable and continuous performance even in the most challenging environments. Dahua
TPC-SD5641-TB25Z45 | POE PTZ THERMAL IP CAMERA WITH 3.95-177.75mm VARIFOCAL LENS - 25mm THERMAL LENS - 4 MEGAPIXELS - ARTIFICIAL INTELLIGENCE - TWO-WAY AUDIO - HEAT DETECTION AND TRACKING

The Dahua TPC-SD5641-TB25Z45 is a professional PTZ thermal camera designed for advanced perimeter protection and monitoring of sensitive areas. It combines a 640×512 VOx thermal sensor with a 25 mm thermal lens and a 4 MP visible camera with 45x optical zoom and a 3.95-177.75 mm lens, ensuring detailed images and precise long-distance detection. Advanced AI functions include intrusion detection, tripwire, human/vehicle classification, heat source detection and automatic target tracking. Thermal and visible image fusion , two-way audio , IR illumination up to 100 m , Hi-PoE support and IP66 certification ensure high performance and continuous reliability even in the most challenging environmental conditions.
Main specifications:
- 640×512 VOx thermal sensor
- 4 MP CMOS optical sensor
- 25mm thermal optics
- Visible optics 3.95-177.75 mm
- 45x optical zoom
- AI with human/vehicle classification
- Heat, intrusion and tripwire detection
- Thermal and visible image fusion
- Two-way audio
- IR illumination 100m
- IP66 protection and Hi-PoE power supply
Further details
The camera integrates a 3.95-177.75 mm visible lens with a powerful 45x optical zoom , ideal for detailed monitoring of large areas and identification of subjects and vehicles even at long distances.
The 25mm thermal optic offers high performance in detecting heat sources and thermal anomalies, allowing effective surveillance even in total darkness, fog, smoke or adverse weather conditions.
✅ Two-way audio:
Technical data sheet
| TPC-SD5641-TB25Z45 | |
| Thermal | |
| Detector Type | Vanadium oxide uncooled focal plane detector |
| Effective Pixels | 640 (H) × 512 (V) |
| Pixel Pitch | 12 μm |
| Spectral Range | 8 μm–14 μm |
| Sensitivity (NETD) | ≤35 mK (@f/1.0) |
| Focal Length | 25 mm |
| Field of View | H: 18.6°; V: 14.8° |
| 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 | Manual/Auto |
| Image Flip | 180° |
| Exposure Compensation | Yes |
| Visible Focus Control | Manual |
| Focal Length | 3.95 mm–177.75 mm |
| Field of View | H: 67.5°–1.9° V: 39.4°–1.1° |
| Close Focus Distance | 1 m–10 m (3.28 ft–32.81 ft) |
| Illuminator On/Off Control | Auto; manual |
| Illumination Distance | 100 m (328.08 ft) |
| Audio and Video | |
| Video Compression | H.265; H.264M; H.264H; H.264B |
| Video Compression | Thermal: Main stream: 1280×1024; 1280×720; 640×512; 1280 × 1024 (default) Sub stream: 640 × 512; 320×256; 640 × 512 (default) Visible: Main stream:2688×1520 (optional); 2560 × 1440; 1080p (1920 × 1080); 1280×720; 704×576; 2560 × 1440 (default) Sub stream: 1920×1080; 1280×720; 704×576 |
| Video Frame Rate | Thermal: 50 Hz: (main stream) 1 fps–50 fps adjustable, 50 fps by default; (sub stream) 1 fps–25 fps adjustable, 15 fps by default 60 Hz: (main stream) 1 fps–60 fps adjustable, 60 fps by default; (sub stream) 1 fps–30 fps adjustable, 15 fps by default Visible: 50 Hz: (main stream) 1 fps–25 fps adjustable, 25 fps by default; (sub stream) 1 fps–25 fps adjustable, 15 fps by default 60 Hz: (main stream) 1 fps–30 fps adjustable, 30 fps by default; (sub stream) 1 fps–30 fps adjustable, 15 fps by default |
| Audio Compression | G.711a; G.711mu |
| Image Encoding Format | JPEG |
| PTZ | |
| Pan/Tilt Range | Pan: 0° to 360° endless Tilt: –10° to +90° |
| Manual Speed Control | Pan: 0.1°/s –200°/s Tilt: 0.1°/s –120°/s |
| Preset Speed | Pan: 240°/s Tilt: 200°/s |
| Presets |
200 |
| Tour | 8 (up to 32 presets per tour) |
| Pattern | 5 |
| Scan | 2 |
| Power-off Memory | Yes |
| Privacy Masking | 4 areas in the same view |
| Idle Motion | Presets; car patterns; car tours; Pan; progressive scan |
| Function | |
| Two-way Audio | Yes |
| Network Protocol | HTTP; HTTPS; TCP; ARP; RTSP; RTP; UDP; RTCP; SMTP; FTP; DHCP; DNS; DDNS; PPPOE; IPv4/v6; SNMP; QoS; UPnP; NTP; Multicast; SFTP; 802.1x |
| Region of Interest (RoI) | Yes |
| Storage | Micro SD card |
| Micro SD Card (Max.) | 512 GB |
| Interoperability | ONVIF; CGI; Dahua SDK |
| Browser | IE: IE 8 and later Chrome: 42 and earlier Firefox: 42 and earlier |
| User/Host | Up to 20 (total bandwidth: 64 MB) |
| Security | Authorized username and password; attached MAC address; encrypted HTTPS; IEEE 802.1x; controlled network access |
| User Management | Up to 10 users; supports multi-level user permissions (2 levels): management group and user group |
| Malfunction Detection | Network disconnection detection; IP conflict detection; memory card state detection; memory space detection |
| PIP | Yes (Intelligence automatically turns off when PIP is on) |
| Intelligence | |
| Heat Detection | Yes |
| Cold/Hot Spot Trace | Yes |
| IVS (Perimeter Protection) | Yes. Supports tripwire and intrusion |
| Target Distinction | Human/Vehicle Classification |
| Target Tracking | Yes |
| Port | |
| Analog Output | 1 × CVBS output; BNC port |
| Network Port | 1 × RJ-45 (10/100 Base-T) |
| Alarm Input | 7 |
| Alarm Output | 2 |
| Audio Input | 1 |
| Audio Output | 1 |
| RS-485 | 1 |
| Power | |
| Power Supply | 36 VDC ± 50%, Hi-PoE |
| Power Consumption | Basic: ≤21W (36VDC); 16W (PoE) Max: ≤40W (36VDC); 41W (PoE) |
| Environment | |
| Operating Temperature | –30 °C to +60 °C (–22 °F to +140 °F) |
| Operating Humidity | ≤95% |
| Storage Temperature | –40 °C to +70 °C (–40 °F to +158 °F) |
| Physical Characteristics | |
| Protection | IP66 |
| Reliability | Surge protection: 6 kV Air discharge: 15 kV Contact discharge: 8 kV |
| Anti-corrosion Level | Basic Protection *The products are designed for general use in areas that have no specific requirements for anti-corrosion protection. |
| Structure | |
| Product Dimensions | Φ240mm × 382mm (Φ9.45" × 15.04") |
| Packaging Dimensions | 319 mm × 319 mm × 521 mm (12.56" × 12.56" × 20.51") (L × W × H) |
| Net Weight | ≤8 kg (17.64 lb) |
| Gross Weight | ≤10 kg (22.05 lb) |


