Barrel Power Supplies
| System | Voltage | Current | Barrel Size | Polarity | Official PSU Model |
|---|---|---|---|---|---|
| Group 1 – 9V DC, 5.5mm × 2.1mm, Centre Negative | |||||
| ZX Spectrum +2 / +2A / +3 | 9V DC | 2.1A | 5.5 × 2.1mm |  |
Sinclair PSU (various OEM) |
| Sega Saturn | 9V DC | 1.5A | 5.5 × 2.1mm | |
MK-2103 |
| Super Nintendo (PAL) | 9V DC | 1.3A | 5.5 × 2.1mm | |
SNSP-002E(FRG) |
| NES (PAL) | 9V DC | 1.3A | 5.5 × 2.1mm | |
NES-002E |
| Sega Mega Drive / Genesis (Model 1) | 9V DC | 1.2A | 5.5 × 2.1mm | |
MK-1602-05 |
| Sega Master System | 9V DC | 1.2A | 5.5 × 2.1mm | |
MK-3025 |
| Group 2 – 9V DC, 3.5mm × 1.35mm, Centre Negative | |||||
| ZX Spectrum (16/48K) | 9V DC | 1.4A | 3.5 × 1.35mm | |
Sinclair PSU |
| Atari 7800 | 9V DC | 1.0A | 3.5 × 1.35mm | |
C018187 |
| Atari 2600 (VCS) | 9V DC | 0.5A | 3.5 × 1.35mm | |
C017945 |
| Group 3 – 9V DC, 4.75mm × 1.7mm, Centre Negative | |||||
| Sega Game Gear | 9V DC | 1.2A | 4.75 × 1.7mm | |
MK-2103 (shared PSU with Saturn in some regions) |
| Group 4 – 6V DC, 4.75mm × 1.7mm, Centre Negative | |||||
| Game Boy (DMG-01) | 6V DC | 0.7A | 4.75 × 1.7mm | |
DMG-03 / MGB-005 |
| Group 5 – 9–10V DC, 4.75mm × 1.7mm, Centre Positive | |||||
| Atari Lynx (Model 1) | 9V DC | 1.0A | 4.75 × 1.7mm |  |
PA-1400 |
| Atari Lynx (Model 2) | 9V DC | 1.0A | 4.75 × 1.7mm | |
PA-1400 |
| Sega Mega Drive / Genesis (Model 2) | 10V DC | 0.85A | 4.75 × 1.7mm | |
MK-1633 |
| Group 6 – 7.5V DC, 4.0mm × 1.7mm, Centre Negative | |||||
| Sony PlayStation (PS1) | 7.5V DC | 2.0A | 4.0 × 1.7mm | |
SCPH-113 |