Toshiba PA2408U AC Adapter 21VDC 1.9A Dual Output 4-Pin Laptop Power 100-240V

Toshiba PA2408U AC Adapter 21VDC 1.9A Dual Output 4-Pin Laptop Power 100-240V

The Toshiba PA2408U is an OEM AC power adapter designed for Toshiba laptop computers requiring a 21V DC supply. It delivers dual 21VDC 1.9A outputs through a proprietary 4-pin DC connector, with a universal 100–240V AC input that operates on both US and international mains voltage. Made by Toshiba Corporation in Tokyo, Japan.

Specifications & What's Included

• Model: PA2408U
• Manufacturer: Toshiba Corporation, Tokyo, Japan
• Input: 100–240V AC, 50/60Hz, 1–0.6A
• Output 1: DC 21V, 1.9A
• Output 2: DC 21V, 1.9A (C.C. — constant current)
• Output connector: 4-pin proprietary DC connector
• Connector pinout: Pin 1 – DC21V 1.9A; Pin 2 – DC21V 1.9A (C.C.); Pin 3 – COM; Pin 4 – R.C.
• Attached US 2-prong AC power cord
• Safety certifications: CSA, GS, S, N, D, FI; Listed Class 2 device (LR86854)
• N/12338 reference marking
• Includes: AC adapter with attached AC cord and DC output cable

Applications

The PA2408U was the OEM AC adapter for a range of Toshiba portable computers from the early-to-mid 1990s — an era when Toshiba used proprietary multi-pin DC connectors rather than the barrel connectors that became standard later. The 4-pin output design carries two separate 21V supply lines (one standard, one constant-current regulated), a common ground, and a remote control line — a configuration used to power both the system and communicate with the battery charging circuit. These adapters are still sought by owners maintaining or restoring period Toshiba portables such as the T-series and early Satellite models, where an original PA2408U is required to match the proprietary connector. The universal 100–240V input means the adapter can be used on any mains voltage worldwide, requiring only a plug adapter for non-US outlets.