Chicony A20-330P1A Charger Guide: Wattage, Models & Compatibility
XiongYing Zeng
Quick Specs
Chicony is a Tier-1 OEM. They make the chargers that ship in Acer, MSI, ASUS, and Lenovo boxes. This isn't a third-party brand — it's the factory that builds the originals
The model number tells you the specs. A20-330P1A = 20V class, 330W, version 1A. Learn to read it once, and you can decode any Chicony adapter
Watch the connector. The same Chicony model can ship with either a 5.5 × 2.5 mm or a 5.5 × 1.7 mm plug. Read the specs, not just the model number
Chicony A20-330P1A.
That string of letters and numbers is printed on the bottom of chargers inside Acer Predator boxes, MSI Raider boxes, Gigabyte AORUS boxes — laptops that people buy thinking they got an "Acer charger" or an "MSI charger." They didn't. They got a Chicony. And the moment that charger dies and they search the model number, they land on pages that treat Chicony like some random third-party brand. It's not.
Chicony Electronics is a $4 billion Taiwanese manufacturer that builds power adapters for the biggest laptop brands on earth. This guide covers what Chicony actually is, how to read their model numbers, what the A20-330P1A, A20-240P2A, and A17-120P2A actually do, and the one thing you need to check before you buy — because two Chicony chargers with the same model number can have different connectors, and if you get the wrong one, it won't fit.
These are compatible replacement adapters built to the original spec. Brand names describe fitment only.
1. Who Is Chicony? (It's Not What You Think)
Chicony isn't a charger brand. It's a factory.
Founded in 1983 in Taiwan, Chicony Electronics is a Tier-1 OEM and ODM manufacturer — the kind of company that builds parts for other companies to put their names on. Annual revenue: over $4 billion. Major customers: Acer, MSI, ASUS, Lenovo, HP, Dell, Gigabyte. If you own a gaming laptop and flip the charger over, there's a decent chance the label says Chicony somewhere on it, even if the box said Acer.
This matters because when people search "Chicony A20-330P1A," they often think they're looking for a no-name replacement. The truth is, they're looking for the same charger that came in the box — just without the Acer or MSI logo printed on top. Chicony isn't a compatible brand. It's the original.
In most cases, buying a Chicony adapter means buying the exact same hardware that shipped with the laptop, from the same factory, just without the laptop brand's markup. That's not a downgrade. That's the supply chain.
2. How to Read a Chicony Model Number
Chicony model numbers look like alphabet soup until you know the code. Here it is, broken down:
| Segment | In A20-330P1A | What it means |
|---|---|---|
| First letter + number | A20 | Series and voltage class. A = adapter series, 20 = 20V class (outputs 19.5V–20V) |
| Middle number | 330 | Wattage. 330 = 330W. 240 = 240W. 120 = 120W. |
| Letter after wattage | P | Feature code. P = with PFC (Power Factor Correction). S = slim. No letter = standard. |
| Final digits | 1A | Revision number. 1A = first version. 2A = second version (often updated internals) |
Once you see the pattern, every Chicony charger unlocks. A20-240P2A? 20V class, 240W, with PFC, second version. A17-120P2A? Likely 19V class, 120W, with PFC, second version — the 17 in A17 usually means a 19V output class rather than 20V. The wattage and the connector are the two numbers you need. The model number tells you the wattage. The label tells you the connector.
3. Chicony A20-330P1A (330W)
This is the big one. The A20-330P1A is a 330W adapter — 19.5V, 16.9A — built for gaming laptops and workstations with top-end GPUs.
| Spec | Value |
|---|---|
| Output | 19.5V / 16.92A (330W) |
| Input | 100–240V, 50/60Hz |
| Connector | 5.5 mm barrel — check if 2.5 mm or 1.7 mm inner diameter |
| Weight | ~650g |
Where it ships:
- Acer Predator Helios — 300, 500, Neo 16 (PHN16-73)
- MSI — Vector 16/17 HX, Raider GE78, Titan, GT76, GE76/GE66
- Gigabyte AORUS — 17 XA, 17 YA
- Clevo barebone laptops — X370 series
The A20-330P1A also goes by several interchangeable part numbers: Chicony 40082375, 40084324, FSP330-ACAU3, FSP330-AJAN3. If you see any of those, it's the same adapter. I've found that cross-referencing these part numbers is the fastest way to confirm compatibility when the laptop brand's own part number doesn't match anything you can find.
The connector trap on the 330W. Some A20-330P1A units ship with a 5.5 × 2.5 mm plug. Others ship with 5.5 × 1.7 mm. Same model number. Different inner diameter. Before you buy, check your laptop's port — or measure your old plug. A 2.5 mm hole won't fit a 1.7 mm pin.
4. Chicony A20-240P2A (240W)
The A20-240P2A is the 240W sibling — 19.5V, 12.3A — covering the mid-to-high gaming range. The P2A suffix tells you it's the second revision.
| Spec | Value |
|---|---|
| Output | 19.5V / 12.3A (240W) |
| Input | 100–240V, 50/60Hz |
| Connector | 5.5 mm barrel |
Where it ships: MSI Pulse GL66, Katana GF66/GF76 (RTX 3060/3070), Crosshair 15/17, and various Acer Predator mid-spec configurations. A 240W Chicony A20-240P2A runs cooler on a 180W machine if you want the headroom.
5. Chicony A17-120P2A (120W)
The smallest of the three, the A17-120P2A outputs 120W — built for entry-level gaming laptops and thin models that don't pull massive power.
| Spec | Value |
|---|---|
| Output | 19.5V / 6.15A (120W) |
| Input | 100–240V, 50/60Hz |
| Connector | 5.5 mm barrel or 4.5 × 3.0 mm — model-dependent |
Where it ships: MSI GF63 Thin (11UC/11UD), entry-level Katana configurations. A 120W Chicony A17-120P2A works on any laptop that shipped with 120W and the same connector.
6. The Connector Trap: Same Model, Different Plug
And now the thing that causes more returns than any other issue with Chicony chargers.
Two A20-330P1A units. Same model number. Same 330W output. Same label. One has a 5.5 × 2.5 mm plug. The other has a 5.5 × 1.7 mm plug. If your laptop port has a 1.7 mm pin, the 2.5 mm plug won't seat. If your port has a 2.5 mm pin, the 1.7 mm plug will be loose. Either way, the model number didn't save you.
This happens because Chicony makes the same charger for different brands. Acer Predator ports use 1.7 mm. MSI ports use 2.5 mm. Chicony builds both, ships both, labels both with the same model number, and expects the brand to spec the connector. When you buy a replacement, you need to know which one your laptop needs.
How to check. Measure your old plug. Or look at your laptop's spec sheet. Or — and this is the most reliable — buy from a seller who lists the connector dimensions in the product description. If the listing says "5.5 mm" with no inner diameter, ask before you buy.
7. Why One Chicony Charger Works Across Brands
This is the part that confuses people, and it shouldn't.
Acer, MSI, ASUS, and Gigabyte all use 19.5V for their gaming laptops. All of them use barrel connectors. Most of them use 5.5 mm outer-diameter plugs. Chicony builds the same underlying adapter — same circuit board, same transformer, same capacitors — and changes the connector tip and the logo printed on the case depending on which brand ordered it.
The truth is, a Chicony A20-330P1A built for an Acer Predator is electrically identical to a Chicony A20-330P1A built for an MSI Raider. The only difference is the plug, and sometimes not even that. If your laptop needs 19.5V, 330W, and a 5.5 × 2.5 mm plug, and the Chicony adapter you're looking at delivers exactly those specs — it works. The brand name on the laptop doesn't enter the equation.
8. How to Spot a Genuine Chicony
Because Chicony is a known OEM, counterfeit Chicony chargers exist. A few things to check:
- The label. A genuine Chicony label has sharp, clean printing. The model number is in the format A##-###X#X. Blurry text, misspelled words, or a model number that doesn't follow the pattern — fake.
- The weight. A 330W Chicony adapter weighs about 650 grams. A fake one is noticeably lighter — they use smaller transformers and fewer capacitors inside.
- The plug. A genuine Chicony barrel plug has a solid metal tip with clean edges. Fakes have rough seams, loose fit, or a tip that wobbles in the housing.
- Certification marks. CE, FCC, RoHS, and often UL — these should be present and clearly printed. If the label has none of them, or the logos look wrong, it's not genuine.
9. FAQ
Is Chicony a good charger brand?
Yes. Chicony is a Tier-1 OEM — they manufacture chargers for Acer, MSI, ASUS, Lenovo, and other major brands. A Chicony adapter isn't a third-party replacement. It's the same hardware that ships in the box, often from the same factory line.
Can I use a Chicony charger on an MSI or Acer laptop?
Yes, if the voltage, wattage, and connector match. A Chicony A20-330P1A with 19.5V, 330W, and the correct 5.5 mm plug works on any laptop that needs those specs — regardless of whether the laptop says Acer, MSI, or Gigabyte on it.
How do I find my Chicony charger model number?
Look at the label on your charger. The model number starts with "A" followed by a number (like A20-330P1A or A17-120P2A). It's printed near the output specs. The same label also shows the voltage, amperage, and wattage you need to match.
How do I contact Chicony for support?
Chicony is a B2B manufacturer — they don't offer direct consumer support. For warranty claims or product questions, contact the seller you bought the charger from. If the charger came with your laptop, contact the laptop manufacturer (Acer, MSI, etc.).
10. Shop Chicony Chargers
Read your label. Note the model number. Check the connector. Each adapter below lists its voltage, amperage, wattage, and plug dimensions — 12-month warranty, 60-day returns.
- 330W Chicony A20-330P1A — for Acer Predator Helios, MSI Vector/Raider/Titan, Gigabyte AORUS
- 240W Chicony A20-240P2A — for MSI Pulse, Katana GF66/GF76, Crosshair
- 120W Chicony A17-120P2A — for MSI GF63 Thin, entry Katana
- Browse all compatible laptop chargers →
Full guide across all brands: how to choose a laptop charger. Brand-specific: Dell & Alienware, Lenovo Legion, ASUS ROG, Acer Predator & Nitro, MSI.
Brand and model names describe product compatibility only. No affiliation with Chicony Electronics or any laptop manufacturer. Check your laptop's wattage and connector against the original adapter before buying.
