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TCL 43S451-CA
Rs.22,364.37

TCL 43C635K
Rs.22,552.41
Model No 43S451-CA 43C635K
TV Type Smart TV Smart TV
Screen Size 43 Inch (109.22 cm) 43 Inch (109.22 cm)
Resolution 4K 3840 x 2160 4K 3840 x 2160
Aspect Ratio 16:9 16:9
Motion Rate 60 Hz 60 Hz
Viewing Angle 178°/178° 178°/178°
USB
USB Version : 2.0
Supported Audio Formats : AAC, MP3, FLAC
Supported Video Formats : MPEG4 Xvid, H.264, H.265, VC1, VP9
Supported Picture Formats : JPEG, PNG, BMP
USB Version : 3.0
Supported Audio Formats : WMA, MP3
Supported Video Formats : AVI, WMV, MP4 ( H.265.H.264, VP9, AV1,… ), MPG, TS, MKV, WebM, VP9
Supported Picture Formats : HEIF, JPG, PNG, BMP, Text Subtitles
Video
Backlight : 4K UHD HDR LED TV
HDR10 : Yes
HLG : Yes
Resolution : UHD
Display Colors : 1.07 Billion
Backlight : 4K UHD QLED
HLG : Yes
PQ10 : Yes
HDR10 : Yes
HDR10+ : Yes
Film Mode : Yes
11 Bit Panel : Yes
Dolby Vision : Yes
Smart HDR : Yes
HDR Premium : Yes
Micro Dimming : Yes
IMAX Enhanced : Yes
Motion Clarity Pro : Yes
Digital Noise Reduction : Yes
Picture Performance Index : 3100
Dynamic Contrast : Mega
Wide Color Technology : Quantum Dot
Picture processing : IPQ 2.0 Engine
Color Management : 20P & 2P Calibration
Video Decoding : H.265 UHD, H.264, MPEG-2
UHD Upscaling : UHD Machine Learning AI SR
Audio
Audio Output ( RMS ) : 10 W + 10 W
Premium Audio : Dolby Digital Plus
Sound Power ( RMS ) : 10 W + 10 W
Auto Volume Control : Yes
Equalizer : Presets
Audio Quality By : ONKYO
Speakers : Full Range
Speaker Type : Down Firing
Dolby : Dolby AC4, Dolby TrueHD
Sound Processing : Dolby Atmos, Virtualization & Upmix
Connectivity Options
HDMI 2.0 : 4 ( 1 eARC )
USB 2.0 : 1
Bluetooth® : Yes
Headphone Jack : 1 Yes
RF Antenna Input : 1 Yes
Composite Audio / Video Input : 1 Yes
Digital Optical Audio Output : 1 Yes
Fast WiFi : 802.11ac 2X2 Dual Band ( Support 2.4GHz & 5GHz )
HDMI 2.1 : 3
USB 3.0 : 1
CI Slot : Yes
DLNA 1.5 : Yes
Headphone : Yes
RF In ( F Sat ) : Yes
Bluetooth 5.0 : Yes
Ethernet / LAN : Yes
USB HID Support : Yes
HDMI Quick Switch : Yes
Chromecast & T-Cast : Yes
Digital Audio Out Optical : Yes
RF in ( IEC Terrestrial / Cable ) : Yes
HDCP 2.2 : 2,3
HDMI CEC ( T-link ) : Full
HDMI eARC / ARC : eARC HDMI 1
YPbPr : CVBS Optional
MHL : Yes ( 3.0 ) via HDMI1
HDMI Max Resolution : 2160P / 60Hz 422 12Bit
WiFi : Built-in ac/n/g 2.4/5Ghz MIMO
Smart TV Features
Operating System : Roku TV
Chromecast Built-In : Yes
Works With Alexa : Yes
Quick And Easy Search : Yes
Works With Hey Google : Yes
Works With Apple Homekit : Yes
Easy Voice Control : Works With Siri, Alexa, And Hey Google
Operating System : Android R ( 11.0 )
CPU : Quad Core
Social : Yes
Netflix : Yes
YouTube : Yes
TCL Home : Yes
Google Duo : Yes
HbbTV 2.0.2 : Yes
Web Browser : Yes
Google Home : Yes
Freeview Play : Yes
Google Play Store : Yes
Google Assistant Built-In : Yes
AI Google Assistant : Google Assistant Hands Free
AI Amazon Alexa : Works With Alexa DE / FR/ IT / UK
4K : Netflix, YouTube, Amazon Prime, AppleTV+ & More
Unlimited Content : Netflix , Disney+ , Amazon Prime, YouTube , HBO GO, Spotify, Twitch, Kodi, Plex, Google play movies, Hulu, Rakuten and so many others…
Other Features
Sleep Timer : Yes
Closed Caption : Yes
1 Year Limited Warranty : Yes
Parental Control ( V-Chip ) : Yes
Accessible Menu System ( CVAA ) : Yes
Live TV Pause From Antenna ( Up To 30 Minutes ) : Yes
Control Buttons : One Button
Multilingual On-Screen-Display : English, Spanish, French
Tuner Type : ATSC / NTSC / Clear QAM
Design : Bezel-Less Ultra Slim Metal Design : Premium & Elegant Frameless Design
Color : Brushed Silver Metal Front
Stand Type : Fixed
Teletext : Yes
Sleep Timer : Yes
Sports Mode : Yes
Game Master : Yes
Analogue Tuner : Yes
Quick Power On : Yes
Caption ( Subtitle ) : Yes
USB HID Support : Yes
Auto Channel Search : Yes
USB Channel List Clone : Yes
Auto Low Latency Mode ( ALLM ) : Yes
Smartphone / Tablet Remote Support : Yes
Multipicture : PAT
Game Mode : Auto
EPG ( DVB EIT / SI ) : Up To 8 Days
CI+ : Yes ( 1.4, ECP )
DTV Tuner : DVB-T2 / C / S2
Analogue Tuner Systems : PAL / SECAM / NTSC ( AV ) BG / DK / I / LL
OSD Languages : 29 Albanian, Bulgarian, Croatian, Czech, Danish, Dutch, English, Estonian, Finnish, French, German, Greek, Hungarian, Italian, Latvian, Lithuanian, Macedonian, Norwegian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swedish, Turkish, Ukrainian
General Details
Power Supply (Voltage, Hz) : AC 100V-240V 50/60Hz
Annual Power Consumption : 83 kWh/Y
Power Consumption Standby : <0.5 W
Weight Without Stand : 6.21 Kg
Weight With Stand : 6.30 Kg
Packaging Weight : 8.48 Kg
VESA Walll Mount Pattern : 200 mm X 200 mm
Power Supply ( Voltage, Hz ) : 220-240V~50Hz
Max Power Consumption : 120 W
Annual SDR Power Consumption ( EEI 2021 ) ( X1 ) : 65 W
Annual HDR Power Consumption ( EE I 2021 ) ( X1 ) : 100 W
Power Consumption Standby* : 0,5 W
Weight Without stand : 7.70 Kg
Weight With stand : 7.80 Kg
Packaging Weight : 10.40 Kg
EEI 2021 Class SDR ( X1 ) : G
EEI 2021 Class HDR ( X1 ) : G
Auto Power Off : Yes
Peak Luminance Ratio : 65%
Vesa Size : 200 mm X 200 mm
Supplied Accessories
Remote Control - 1N : RC280
2 AAA Batteries - 2N : Yes
User Manual - 1N : Yes
Warranty Info - 1N : Yes
Screw Size : M6 X 12
Quick Start Guide : Yes English
Remote Control : RC802N5
Batteries : Yes
User Manual : Yes

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Key Differences

Both TVs provide standard built-in audio performance suitable for regular usage, though external speakers can enhance the experience. TCL 43S451-CA and TCL 43C635K are two competitive smart TVs offering a mix of display performance, smart features, and overall value for different types of users. Both TVs come in similar screen sizes, making them suitable for comparable viewing setups and room environments. Both TVs provide decent motion handling, making them suitable for everyday viewing including sports and action content. Overall, both models are capable choices in their segment, offering a balance between performance, features, and usability. Both TVs offer adequate brightness levels suitable for most indoor lighting conditions. TCL 43S451-CA and TCL 43C635K differ in resolution (UHD vs 4K 3840 x 2160), which can affect overall clarity and sharpness of the display. Both TVs come with smart platforms that support popular streaming apps and voice control features.

Verdict: Both models offer good value, and the better option depends on your specific requirements and viewing preferences.