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Internal 19-pin USB 3.0 header to front-panel 20-pin USB-C A-key adapter

Tonstep

Tonstep USB 3.0 19-Pin Header to USB 3.1/3.2 Type-C 20-Pin A-Key Adapter

SKU CH-HYFE-JPMF6

Converts a motherboard USB 3.0 19-pin header to a front-panel USB 3.1/3.2 Type-C 20-pin A-key connector

  • Connector TypeLighting Connector to USB A
  • Add front-panel USB-C without a new motherboard
  • Connects 19-pin internal header to 20-pin A-Key header
  • Works with USB 3.0, 3.1 and 3.2 motherboard headers
  • Maintains existing 5 Gb/s header bandwidth
  • Simple internal adapter for front-panel USB-C access

Internal USB 3.0 Header to Front Panel Type-C

This adapter connects a motherboard USB 3.0 19-pin header to a front-panel USB 3.1/3.2 Type-C 20-pin A-Key port. It lets builders add a modern USB-C connector to cases without requiring a newer motherboard with native Type-C headers. The device simply bridges the existing internal connection.

Passive Design With No Active Cooling

The unit operates without fans or external power, adding zero noise or thermal load to the system. It draws power directly from the motherboard header and does not increase the 5 Gb/s bandwidth to 10 Gb/s. Normal use remains limited to the host header's native USB 3.0 speed.

Compact PCB With Keyed Connectors

The small circuit board fits behind standard front-panel cutouts and uses keyed 19-pin and 20-pin headers to prevent misalignment. The A-Key orientation ensures correct insertion every time. No screws or brackets are included, so mounting relies on the port's own panel retention.

Highlights

  • Add front-panel USB-C without a new motherboard
  • Connects 19-pin internal header to 20-pin A-Key header
  • Works with USB 3.0, 3.1 and 3.2 motherboard headers
  • Maintains existing 5 Gb/s header bandwidth
  • Simple internal adapter for front-panel USB-C access

Specifications

Connector TypeLighting Connector to USB A

Questions about this item

How do I connect the 19-pin header to the motherboard correctly?

Align the 19-pin male plug with the motherboard USB 3.0 internal header, match the missing-pin key, and press straight down until fully seated; forcing it sideways bends pins.

Will the front-panel Type-C port need any upkeep over time?

The female 20-pin A-Key header has no moving parts; occasional dust removal with compressed air keeps the contacts clean.

What speed limit appears first when I run large transfers continuously?

The adapter passes the motherboard 3.0 19-pin signal unchanged, so sustained throughput stays at the 5 Gb/s header rate.

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