StarTech 177B-USBC-MULTIPORT USB-C Multiport Adapter

Overview

The StarTech 177B-USBC-MULTIPORT takes a single USB-C port and expands it into a full desktop docking interface — 4K 60Hz HDMI output, 140W USB-C Power Delivery passthrough, 10Gbps USB data, 2.5 Gigabit Ethernet, and an SD card reader, all in a 125 x 50 x 15mm form factor that fits in a laptop bag without a second thought. If you're deploying workstations for security operators, IT engineers, or field technicians who work from a single USB-C notebook and need reliable, high-bandwidth connectivity at a fixed desk or temporary site, this is where the 177B-USBC-MULTIPORT earns its keep.

Key Features

• 4K 60Hz HDMI Output (3840x2160): Drives a single display at full 4K resolution and 60 frames per second — smooth enough for VMS timeline scrubbing and live multi-stream monitoring without the judder you get at 30Hz. One display maximum, so plan accordingly if your operator station requires a dual-head setup.
• 140W USB-C Power Delivery Passthrough: At 140W, this adapter can charge a high-performance laptop — including newer USB-C notebooks that require more than the 100W ceiling of previous PD specs — while simultaneously running all connected peripherals. The host machine stays powered without a second wall brick on the desk.
• 10Gbps USB Data (USB 3.2 Gen 2): The USB-A or USB-C data port delivers 10Gbps throughput under the USB 3.2 Gen 2 standard. Transferring large video evidence archives, forensic disk images, or firmware update packages to connected storage is meaningfully faster than a 5Gbps Gen 1 port — roughly half the wait time on large sequential transfers.
• 2.5 Gigabit Ethernet: Wired network throughput at 2.5GbE is a practical upgrade over standard gigabit for environments where the upstream switch supports it — streaming high-bitrate RTSP feeds from multiple cameras to a laptop-based NVR client, or pulling large recorded video files from network storage, will saturate a 1GbE link faster than most users expect. The 2.5GbE port keeps headroom in reserve.
• SD / SDHC / SDXC (UHS-I) Card Slot: Reads all mainstream SD card formats up to UHS-I speeds. Useful for importing footage from body cameras, action cams, or standalone recorders that write to SD media — a common workflow in field investigations and mobile surveillance deployments.
• Compact and Portable (125 x 50 x 15mm, 0.1kg): At 100 grams and roughly the footprint of a large USB drive, the 177B-USBC-MULTIPORT (often searched as 177B USBC MULTIPORT) travels with the laptop rather than staying bolted to a desk. Field engineers, site auditors, and integrators doing remote commissioning runs will appreciate not having to ship a separate dock to every job site.
• Operating Temperature -10°C to 45°C: Rated for use in environments from near-freezing to 45°C ambient — covers most conditioned server rooms, security operations centers, and temporary command posts. Not rated for outdoor unhoused use.

Integration and Compatibility

The 177B-USBC-MULTIPORT connects via USB-C and requires a host port that supports USB 3.2 Gen 2 data, DisplayPort Alt Mode for the HDMI video output, and USB Power Delivery for the 140W passthrough to function fully. Confirm your laptop or workstation's USB-C port specification before deploying — a USB-C port that lacks DisplayPort Alt Mode will not drive the HDMI output regardless of the adapter. The bus type is USB-C and the adapter does not require driver installation on modern operating systems, making it practical for locked-down enterprise images and temporary field deployments alike.

The 2.5GbE port will negotiate down to 1GbE or 100Mbps on older switch infrastructure — backward compatible, but you will only see the full 2.5Gbps when the upstream port and cable support it. Use Cat 5e or better for reliable 2.5GbE link establishment.

Frequently Asked Questions

Q: Does the 177B-USBC-MULTIPORT support dual-monitor output?

A: No. The 177B-USBC-MULTIPORT supports a single display output via HDMI at up to 3840x2160 @ 60Hz. If your workstation requires two external monitors, a different docking solution with multiple video outputs is needed.

Q: Will the 140W USB-C PD passthrough charge any laptop?

A: The 140W Power Delivery passthrough is sufficient to charge virtually all USB-C laptops, including newer models that require more than 100W. The actual charge rate delivered to your device depends on your charger's output and your laptop's PD input specification — the adapter passes through up to 140W but does not generate power itself.

Q: What is the warranty on the 177B-USBC-MULTIPORT?

A: StarTech covers the 177B-USBC-MULTIPORT with a 3-year manufacturer warranty.

Q: Does this adapter work with Thunderbolt 4 or USB4 hosts?

A: The adapter is designed for USB-C hosts supporting USB 3.2 Gen 2, DisplayPort Alt Mode, and USB Power Delivery. Thunderbolt 3/4 and USB4 ports are backward compatible with USB 3.2 Gen 2, so the adapter will function on those hosts. Thunderbolt-specific bandwidth or daisy-chaining features are not applicable here.

Q: What SD card formats does the built-in card reader support?

A: The card reader supports SD, SDHC, and SDXC formats at UHS-I speeds. UHS-II cards will operate at UHS-I speeds in this reader.

Q: What is the operating temperature range for the 177B-USBC-MULTIPORT?

A: The adapter is rated for operation from -10°C to 45°C and storage from -10°C to 70°C at 10–90% relative humidity (non-condensing). It is not designed for unhoused outdoor use.

James Everett

The spec I keep coming back to on the 177B-USBC-MULTIPORT is the 140W Power Delivery passthrough combined with the 2.5GbE port in a package this small. Most compact USB-C adapters top out at 100W PD and standard gigabit — StarTech pushed both specs up a tier, which matters when you're deploying operator workstations on newer USB-C-only notebooks that refuse to charge below 100W and need more than 1Gbps to pull live video reliably off network storage.

Technical Highlights:

• 2.5GbE vs. Standard 1GbE: On a network with a 2.5GbE-capable switch, this port delivers 2.5x the throughput of a standard USB-C adapter — the difference between smooth 4K stream playback from NAS and buffering artifacts when multiple cameras are active simultaneously.
• USB 3.2 Gen 2 at 10Gbps: Twice the bandwidth of the Gen 1 (5Gbps) ports found on most budget hubs — relevant when transferring multi-gigabyte video evidence files to external SSD for chain-of-custody handoff; a 50GB archive that takes 80 seconds on Gen 1 drops closer to 40 seconds here.
• 4K 60Hz HDMI Output: The 60Hz refresh rate is the detail worth noting — 30Hz 4K displays show perceptible motion lag when scrolling VMS timelines or panning camera feeds, which fatigues operators over a full shift. 60Hz eliminates that.

Deployment Considerations:

• Verify your laptop's USB-C port supports DisplayPort Alt Mode before deployment — USB-C ports that are data-only (no Alt Mode) will pass USB and PD but produce no HDMI output, which is a common source of field confusion on budget ultrabooks.
• The 140W PD passthrough requires a 140W (or higher) USB-C charger connected to the adapter's upstream PD port to deliver full power — the adapter itself does not boost a lower-wattage charger, so a 65W brick will only pass 65W regardless of the adapter's rating.

This adapter is the right call for a security integrator's go-bag: field commissioning visits, temporary operator stations during facility buildouts, or a traveling VMS administrator who needs a single compact device to drive a 4K monitor, stay charged, and pull footage off SD media without carrying three separate dongles.