KENSINGTON 

KENSINGTON K33603NA SD4781P EQ USB-C/USB-A

Mfg Part Number:  K33603NA  
Image may not reflect the actual item.
Price: $276.30
Quantity:
In Stock: 2449
Last Updated: Jun 22, 2026
No Sales Tax except these states
, PO and Wire.

Features | Universal Compatibility

Supports USB-C® and legacy USB-A laptops running Windows 7 or above, macOS 10.14 or above, Chrome OS 44 or above.

Sustainability Focused

The plastic in this product contains up to 50% post-consumer recycled (PCR) content.

Dual 4K Video via HDMI® 2.0 and DP++ 1.2

Four video ports allow you to select between HDMI® 2.0 and DP++ 1.2 without the need for cumbersome adapters. Also supports M1/M2/M3 MacBook with dual displays.

Up to 100W Power Delivery

Delivers power to laptop, docking station, and connected accessories. Supports up to 100W for USB-C® Alt Mode laptops. USB-A laptops require optional Power Splitter (K38310NA) for Power Delivery.

Multiple Ports

Delivers speeds up to 10Gbps via 1x USB-C® port and 5x USB-A ports. Front: 1x USB-C® 3.2 Gen2 up to 5V/3A or up to 9V/2A for supported devices, and 1x USB-A 3.2 Gen2 up to 5V/1.5A, supports BC 1.2, up to 5V/2.4A for Apple devices; Back: 4x USB-A 3.2 Gen1 up to 5V/0.9A. Also includes a Gigabit Ethernet port and audio combo jack.

Secure Screw Lock Connection

Host cable is equipped with secure screw lock connector for a consistent and reliable connection between the docking station and the laptop.

Zero-Footprint Mounting Option and Security Cable Lock Slots

Maximize desktop space by mounting your docking station out of the way. Mounting bracket sold separately (K34050WW). Protect your investment with a Kensington cable lock (K65020WW or K65021WW), sold separately.

Free Kensington DockWorks™ Software and 3-Year Limited Warranty

Free DockWorks™ software delivers the best connection, performance, and security from your Kensington dock. Enjoy peace of mind knowing your covered by Kensington with a professional warranty.

The SD4781P EQ USB-C® & USB-A Dual 4K Docking Station is a versatile and sustainable dock that supports USB-C® and legacy USB-A laptops with the all-in-one benefits of video, data, and power. Delivering support for up to 2 external Ultra HD monitors (4K @ 60Hz), and the ability to select between HDMI® 2.0 and DP++ 1.2 connections (4 video ports for up to 2 external displays), the SD4781P eliminates the need for cumbersome adapters. It provides up to 100W of power delivery to the laptop and dock and delivers data transfer speeds up to 10Gbps via 6 USB ports. Additional features include host cable with secure screw lock connection, Gigabit Ethernet port, combo audio jack, mountable design, sustainable components, optional Kensington DockWorks™ software, and three-year limited warranty.

  • Supports USB-C® and legacy USB-A laptops running Windows 7 or above, macOS 10.14 or above, Chrome OS 44 or above.
  • The plastic in this product contains up to 50% post-consumer recycled (PCR) content.
  • Ultra HD on up to 2 external monitors. Also supports M1/M2/M3 MacBook with dual displays.
  • Delivers up to 100W of Power Delivery to compatible laptops while powering connected accessories. USB-A laptops require optional power splitter (K38310NA) for Power Delivery.
Main Specification
General Information
Manufacturer Kensington Computer Products Group
Manufacturer Part Number K33603NA
Manufacturer Website Address http://www.kensington.com
Brand Name Kensington
Product Model SD4781P
Product Name SD4781P EQ USB-C & USB-A Dual 4K Docking Station with 100W Power Delivery
Product Type Docking Station
Technical Information
Connectivity Technology Wired
Charging Capability Yes
Device Supported MacBook
Device Supported Monitor
Device Supported Notebook
Features Power Delivery Pass-through
Features Plug & Play
Number of Displays Supported 2
Screen Mode Supported 4K @ 60Hz
Screen Mode Supported 4K
Screen Mode Supported 4K UHD
Supported Resolutions 4096 x 2160
Supported Resolutions 3840 x 2160
Maximum Data Transfer Rate 1.25 GB/s
Security Slot Type Kensington Security Slot
Security Slot Type Nano Security Slot
Network & Communication
Ethernet Technology Gigabit Ethernet
Interfaces/Ports
Host Interface USB Type C
Host Interface USB Type A
Total Number of USB Ports 6
USB Type-A Yes
Number of USB 3.2 Gen 1 Type-A Ports 4
Number of USB 3.2 Gen 2 Type-A Ports 1
Number of USB Type-A Ports 5
USB Type-C Yes
USB Type-C Detail 1 x USB-C 3.2 Gen 2 (front) with 5V/3A, USB-C PD 3.0 (100W of laptop charging)
Number of USB Type-C Ports 1
Network (RJ-45) Yes
DisplayPort Yes
DisplayPort Version 1.2++
Number of DisplayPort Outputs 2
Headphone/Microphone Combo Port Yes
HDMI Yes
HDMI Version 2
Number of HDMI Outputs 2
USB Power Delivery 100W
Software
Operating System Supported ChromeOS 44
Operating System Supported Mac OS X 10.14 Mojave
Operating System Supported Windows 7
Physical Characteristics
Form Factor Desktop
Miscellaneous
Kensington Security Slot Yes
Compatibility

Apple MacBook

Brand Compatibility Apple
Post-consumer-waste% 50%
WARNING:: The plastic used in cable products can expose you to lead and lead components, chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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