| Max Output Power | 40 Watts | 40 Watts | 80 Watts | 80 Watts |
| Low Range Rating | 7 V / 5 A | 20 V / 2 A | 7 V / 10 A | 20 V / 4 A |
| High Range Rating | 20 V / 2 A | 50 V / 0.8 A | 20 V / 4 A | 50 V / 2 A |
| Model 6621A (Dual Output) | 2 | |||
| Model 6622A (Dual Output) | 2 | |||
| Model 6623A (Triple Output) | 1 | 1 | 1 | |
| Model 6624A (Quad Output) | 2 | 2 | ||
| Model 6627A (Quad Output) | 4 |
