Firmware
3300091_DH_SD-Kant-Dual_MultiLang_PN_V2.820.0000017.1.R.250719.zip
Dahua firmware released Jul 19, 2025. May work with 7 devices, including SDT3A200-2F-NB-0400-A, SDT3A200-2F-NB-0400-B, SDT3A200-2F-NB1-0400-A.
- Released
- Jul 19, 2025
- Version
- V2.820.0000017.1.R
- Size
- 30.7 MB
- Hardware
- 7 devices
Download
Permanent copy on the Internet Archive (item page)
- MD5
cd04fe39a3fe218010b683879c96e32f- SHA-256
6b1bb75dd2a2b0f6429e6b61dae02372a39950e438fb1ff0dbd3ee647611b933
Where it's published
Mirrored by
Dahua
files.dahuatech.support
MirrorSold as
- Folder: SD_Cameras(PTZ)/SD-Kant-Dual
V2.820.0000017.1.R · Listed date Jul 19, 2025
Compatible hardware
Hardware IDs this firmware's installer accepts (7 devices).
- SDT3A200-2F-NB-0400-A
- SDT3A200-2F-NB-0400-B
- SDT3A200-2F-NB1-0400-A
- SDT3A200-2F-NB1-0400-B
- SDT3A300-3F-NB-0400-A
- SDT3A400-4F-NB-0400-A
- SDT3A400-4F-NB-0400-B
Where these IDs come from
- hwid in DH_SD-Kant-Dual_MultiLang_PN_V2.820.0000017.1.R.250719.bin: the device's own hardware check list, 7 IDs
- Install in DH_SD-Kant-Dual_MultiLang_PN_V2.820.0000017.1.R.250719.bin: the installer's device list (board families), 1 ID, vendor General (not counted: a more specific list exists)
- check.img in DH_SD-Kant-Dual_MultiLang_PN_V2.820.0000017.1.R.250719.bin: the device's own hardware check list, 7 IDs
Technical details
Read from inside the firmware (zip archive).
- SoC
- SigmaStar Infinity6C
- Architecture
- arm
- OEM build
- General
- Flash
- 128.0 MB
- Image dates
- Jul 19, 2025
- Security
- Signed, encrypted, security baseline V2.4
- Language & video
- English by default · 4 languages · PAL
- Software version
- V2.820.0000017.1.R.250719
Supported languages (4)
English, Arabic, SpanishEU, Thai
Flash layout: 22 partitions, 9 written by this firmware
From the firmware's partition table (partitionV2.txt).
| Partition | Start | End | Size | Image | Filesystem | Built |
|---|---|---|---|---|---|---|
| mini-Boot | 0x0 | 0x140000 | 1.3 MB | not written | — | — |
| IPL | 0x140000 | 0x1a0000 | 384.0 KB | IPL.bin.img | — | 2025-07-19 |
| IPL_CUST | 0x1a0000 | 0x200000 | 384.0 KB | IPL_CUST.bin.img | — | 2025-07-19 |
| U-Boot | 0x200000 | 0x300000 | 1.0 MB | dhboot.bin.img | — | 2025-07-19 |
| smc | 0x300000 | 0x400000 | 1.0 MB | not written | — | — |
| dgs | 0x400000 | 0x500000 | 1.0 MB | not written | — | — |
| hwid | 0x500000 | 0x5c0000 | 768.0 KB | not written | — | — |
| syslog | 0x600000 | 0xa00000 | 4.0 MB | not written | ubi | — |
| config | 0xa00000 | 0xe00000 | 4.0 MB | not written | ubi | — |
| backup | 0xe00000 | 0x1200000 | 4.0 MB | not written | ubi | — |
| devconfig | 0x1200000 | 0x1600000 | 4.0 MB | not written | ubi | — |
| updateflag | 0x1600000 | 0x1700000 | 1.0 MB | not written | — | — |
| dtb(ro) | 0x1700000 | 0x1800000 | 1.0 MB | dhdtb.bin.img | — | 2025-07-19 |
| backdtb(ro) | 0x1800000 | 0x1900000 | 1.0 MB | dhdtb-bak.bin.img | — | 2025-07-19 |
| lens | 0x1900000 | 0x1a00000 | 1.0 MB | not written | — | — |
| Kernel | 0x1a00000 | 0x1e00000 | 4.0 MB | kernel.img | — | 2025-07-19 |
| romfs(ro) | 0x1e00000 | 0x3200000 | 20.0 MB | romfs-x.squashfs.img | squashfs | 2025-07-19 |
| web(ro) | 0x3200000 | 0x3e00000 | 12.0 MB | web-x.squashfs.img | squashfs | 2025-07-19 |
| firmware(ro) | 0x3e00000 | 0x5c00000 | 30.0 MB | firmware-x.squashfs.img | squashfs | 2025-07-19 |
| backweb(ro) | 0x5c00000 | 0x6800000 | 12.0 MB | not written | — | — |
| backromfs(ro) | 0x6800000 | 0x7c00000 | 20.0 MB | not written | — | — |
| backkernel | 0x7c00000 | 0x8000000 | 4.0 MB | not written | — | — |
About the security baseline: firmware with a higher security baseline can stop a device going back to older firmware. A device already on a higher baseline than V2.4 may refuse this file, and after installing it you may not be able to downgrade to firmware with a lower baseline.
Related firmware
Other files for much of the same hardware, from any vendor.
- DH_SD-Kant-Dual_MultiLang_PN_V2.820.0000029.0.R.260115.zip
Released Feb 28, 2026 · V2.820.0000029.0.R · 7 devices · Dahua
- 3300089_General_SD-Kant-Dual_MultiLang_PN_V2.820.0000017.1.R.250719.zip
Released Jul 19, 2025 · V2.820.0000017.1.R · 7 devices · Dahua
- DH_SD-Kant-Dual_MultiLang_PN_V2.820.0000010.0.R.241114.zip
Released Dec 20, 2024 · V2.820.0000010.0.R · 9 devices · Dahua