Toshiba Tecra 500CS 500CDT 510CDT NJD-4450 Internal AC Power Supply P000221950

Toshiba Tecra 500CS 500CDT 510CDT NJD-4450 Internal AC Power Supply P000221950

The Toshiba NJD-4450 (part number P000221950) is the internal AC power supply board designed for the Toshiba Tecra 500 series laptops, including the 500CS, 500CDT, and 510CDT models. This board mounts inside the laptop chassis and converts AC mains power — delivered via an IEC C8 (figure-8) inlet — to the voltages needed by the system, functioning as the core power conversion stage rather than an external brick adapter.

Specifications & What's Included

• Manufacturer: Toshiba
• Model: NJD-4450
• Part Number: P000221950
• Type: Internal AC power supply board / module
• AC inlet: IEC C8 figure-8 2-pin connector (visible on unit)
• Internal output connector: 4-pin polarized board connector on twisted red/blue cable
• Compatible with: Toshiba Tecra 500CS, 500CDT, 510CDT
• Form factor: Internal board/module — mounts inside laptop chassis
• Caution: Double-pole/neutral fusing (as labeled)

Applications

The Toshiba Tecra 500 series was Toshiba's mid-to-upper-tier business laptop line from the mid-1990s, built around a Pentium processor platform and featuring an active-matrix color display. The 500CS, 500CDT, and 510CDT were popular in corporate environments for their portability and built-in multimedia features. The NJD-4450 internal power supply board is a direct replacement part for these models when the original fails or needs service — a part that is increasingly difficult to source as the platform ages. It is suited for repair shops, vintage computer enthusiasts, and anyone maintaining a working Tecra 500-series unit.