VIOFO HK3-C Hardwire Kit - USB-C 5V 2A for A139 & A139 Pro

Parking Mode Power for the A139 Series. VIOFO HK3-C delivers 5V 2A over USB-C

A three-channel setup draws noticeably more than a single front camera, and an unsuitable kit shows up as random reboots in Parking Mode that you will spend a weekend chasing. The HK3-C is VIOFO's USB-C hardwire kit for the A139 and A139 Pro, rated at 5V 2A, and it holds four voltage cut-off levels to keep your starter battery out of trouble.

Trusted AU store: We're an authorised AU reseller, shipping from Melbourne within 24 hours^*. You get a 12-month warranty on this accessory, local technical support, and our 30-Day No-Worries returns.

Who This Isn't For: VIOFO lists the HK3-C for the A139 and A139 Pro. For other current USB-C VIOFO cameras, the HK4 is the standard choice. The older Mini-USB A119 V3 and A129 family need the Mini HK3. If you run an A329S and want Hybrid Parking Mode, that specifically requires the HK6. For a VS1, use the HK5.

DCG Score & Highlights

What We Love

• 5V 2A output, VIOFO's rating for the A139 and A139 Pro in 1, 2 and 3-channel setups
• Made for the A139 series, so there is no guesswork on fitment
• Four cut-off steps across both 12V and 24V systems
• Rated from −30 °C to +60 °C, so a summer dashboard is well within spec
• Full 4 m run to reach the fuse box from the windscreen

What Could Be Better

• Fuse taps are not included, so add the correct style for your fuse box.
• Voltage cut-off only, with no parking timer. If you want time-based shutdown, the OP100 has it.
• USB-C only, and VIOFO's older Mini-USB cameras are not compatible.

Why the Right Kit Matters on Multi-Channel Setups

Adding a rear and cabin camera roughly doubles what your dash cam pulls, and Parking Mode is where an unsuitable kit fails first, because the camera is running on a battery that is already sagging. Using the kit the manufacturer specifies for your camera is the difference between reliable parked footage and a camera that reboots every time the voltage dips.

Top Benefits

• Stable on three channels: 5V 2A is VIOFO's rating for a fully loaded A139 or A139 Pro.
• Battery protection you set: Four cut-off levels let you be cautious with an older battery.
• Automatic mode switching: ACC sensing puts the camera into Parking Mode as soon as you shut the car down.
• Made for the A139 series: VIOFO lists the HK3-C for the A139 and A139 Pro.
• Built for the climate: Rated to +60 °C for Australian summers.

Upgrade Your Parked Protection Today

Add the VIOFO HK3-C to your cart, along with the right fuse taps and a high-endurance microSD card for the extra event files. Compare the full range in our hardwire kits collection. Ships from Melbourne within 24 hours^*, covered by our 30-Day No-Worries returns.

Last updated: September 2026

📖 Own this already? Read the VIOFO HK3-C Hardwire Kit User Manual & Setup Guide.