The Mean Well HLG-320H-C2100AB is a 320 W constant-current LED driver — 2100 mA across a 76–152 V window — and a common driver in high-power LED grow lights. It is the AB version: a built-in potentiometer to trim output current, plus 3-in-1 dim wires, so it can be set by hand or controlled by an AC Infinity controller through the Type-D adapter.
The driver behind a lot of grow lights
A 2100 mA constant-current driver is the standard for LED strings in the 76–152 V range, which covers a large share of commercial and DIY boards wired in series. When a light of that type stops working, the driver is usually what failed — replacing it costs a fraction of a new light. Check the old driver's label: if it reads 2100 mA and your string sits inside 76–152 V, this is the match.
Output current is adjustable by the built-in potentiometer, so you can run the string below 2100 mA for lower heat and longer LED life.
Dimmable, and controller-ready
The grey (DIM+) and black (DIM−) wires accept 0–10 V, PWM or resistance dimming. Wire them to a manual dimmer, or to an AC Infinity UIS Lighting Adapter Type-D and the light runs on the same controller as your fans: sunrise and sunset ramps, schedules and intensity that steps up through the grow.
Built for heat and damp
- Rated −40 to +85 °C case temperature
- IP65, rated for dry, damp and wet locations
- Aluminium housing, fully potted
Protected
- Short-circuit, over-voltage and over-temperature protection
- Active power factor correction
- Wide 90–305 VAC input
Specifications
| Model | Mean Well HLG-320H-C2100AB |
| Output mode | Constant current |
| Output current | 2100 mA (adjustable via potentiometer) |
| Constant-current voltage range | 76–152 V DC (max 156 V) |
| Rated power | 319.2 W |
| Input | 90–305 VAC, 50/60 Hz |
| Efficiency | 94% |
| Dimming | 3-in-1: 0–10 V, PWM, resistance (DIM+ grey, DIM− black) |
| Ingress rating | IP65 |
| Operating temperature | −40 to +85 °C (case) |
| Dimensions | 252 × 90 × 43.8 mm |
| Leads | Bare input and output leads, no plug |
| Approvals | UL8750, CSA, ENEC, CB, CE, EAC |
Mean Well figures.
FAQ
Will this replace the driver in my grow light?
If the old driver is a 2100 mA constant-current model and your LED string runs inside 76–152 V, yes. If the old driver was a different current (1400 mA, 2800 mA, etc.), this is not the match — send us a photo of the label and we will tell you.
What does the AB mean?
A = built-in potentiometer to adjust output current. B = 3-in-1 dim wires. AB has both, so it works whether or not you use dimming.
Can I leave the dim wires unconnected?
Yes. With nothing connected the driver runs at full set output. Insulate the ends.
Which AC Infinity adapter does it need?
The Type-D, which connects to bare DIM+/DIM− wires. The Type-A and Type-B are for lights with an RJ11/RJ12 socket.
Does it come with a plug?
No — bare leads. It is built into a fitting and connected to mains by a licensed electrician.