Description
Replacement ASUS 90W AC Adapter - 19V 4.74A, 4.0×1.35 mm Tip
Trade-grade replacement power supply for ASUS laptops that use the 4.0×1.35 mm barrel connector. Delivers a stable 19V ⎓ 4.74A (90W) output with built-in protection against over-voltage, over-current and short-circuit. Equivalent to common ASUS 90W parts such as ADP-90SB BB / ADP-90YD B (or compatible).
✅ Key Specs
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Output: 19V ⎓ 4.74A (90W)
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Connector: 4.0 mm (outer) × 1.35 mm (inner) barrel, centre-positive
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Input: 100-240V ~ 50/60 Hz (UK mains lead as supplied)
- High-efficiency design with integrated safety protections
✅ Compatible ASUS Series & Examples*
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VivoBook: X200 / X201 / X202 / Q200, X420 / X441, X540 / X541, and related 4.0×1.35 mm models.
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ZenBook: UX31/UX32 family, UX303/UX305/UX330, UX360 (and similar 4.0×1.35 mm variants).
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Convertible/Ultrabook: Q302/Q304/Q534 and other thin-and-light ASUS laptops that specify 19V and the 4.0×1.35 mm tip.
*Model lists are indicative. Many ASUS laptops with the 4.0×1.35 mm connector will accept a 90W adapter if their original spec was equal or lower wattage (e.g., 45W/65W). Always confirm voltage (19V) and plug size (4.0×1.35 mm) on your device label before purchase.
🧰 What’s Included
- 90W AC adapter with 4.0×1.35 mm barrel tip
- Mains power lead (region as supplied)
⚠️ Notes
- Not suitable for ASUS laptops using the larger 5.5×2.5 mm barrel or USB-C PD.
- If your laptop requires 120W/135W/180W+, choose a higher-wattage adapter.
