⚡🖨️ HP 0950‑4392 / 4397 / 4399 Printer Adapter
 
(Dual Output • +32V 500 mA & +15V 530 mA • Flat Light Green 3‑Hole Plug)

This AC adapter delivers two regulated DC outputs — 32V and 15V — through a flat, wide 3‑hole connector. It was HP’s standard supply for compact DeskJet printers that required separate rails for logic and printhead/motor control.
 
🔧 Charger Form
Input: 100–240V AC, 50/60Hz
Output:
+32V DC @ 500 mA
+15V DC @ 530 mA
Connector: Flat light green plug with 3 holes in a line
Common part numbers: 0950‑4392, 0950‑4397, 0950‑4399
Total power: ~18W
 
🖥️ Compatible Devices
🟦 HP DeskJet Series
DeskJet 3500
DeskJet 3600
DeskJet 3700
DeskJet 3745
DeskJet 3840
DeskJet 3845
 
✅ Common Uses
🔌 Powering HP’s compact DeskJet printers with dual‑rail logic and motor control
🧩 Replacing lost or damaged OEM 0950‑439x adapters
🎒 Travel setups with portable DeskJet interiors
🧪 Testing DeskJet 3500–3845 printers with a known‑good 18W dual‑rail supply
 
🧠 Signal Format
⚡ Input: Universal AC (100–240V)
🔋 Output: Dual DC rails (32V + 15V)
🔌 Flat 3‑hole plug, light green plastic
🔁 Not interchangeable with HP’s barrel‑style 30V, 31V, or single‑rail 32V adapters
 
⚠️ Things to Watch Out For
📉 Connector is unique — flat, wide, light green with 3 holes in a line
🔌 Not compatible with HP’s 0950‑3490 (32V/16V) or 0957‑2120 (32V single‑rail) bricks
🧯 Using the wrong adapter may cause “printer not recognized” or power faults
🧪 Always confirm the printer’s underside label (32V/15V dual input) before plugging in
 
🛠️ Quick Tips for Beginners
🧭 Look for “0950‑439x” on the adapter label to confirm match
🔌 Use only with printers that accept the flat green 3‑hole plug
🧪 If printer won’t power on, inspect plug holes for bent contacts
🧯 Label adapters clearly to avoid mix‑ups with HP’s barrel‑style bricks
🧵 Versatile collector’s item covering HP’s dual‑rail DeskJet era