| 2CU50R Supplementary Protector 50A, 2 Pole, 277V AC, C Trip, UL1077 | Altech Corp. | | |
| 2DU4R Supplementary Protector 4A, 2 Pole, 277V AC, D Trip, UL1077 | Altech Corp. | | |
| 2DU10R Supplementary Protector 10A, 2 Pole, 277V AC, D Trip, UL1077 | Altech Corp. | | |
| 2DU12R Supplementary Protector 12A, 2 Pole, 277V AC, D Trip, UL1077 | Altech Corp. | | |
| 2C4UR Supplementary Protector 4A, 2 Pole, 480Y/277V AC, C Trip, UL1077 | Altech Corp. | | |
| 2C40UR Supplementary Protector 40A, 2 Pole, 480Y/277V AC, C Trip, UL1077 | Altech Corp. | | |
| 2C63UR Supplementary Protector 63A, 2 Pole, 480Y/277V AC, C Trip | Altech Corp. | | |
| 2D05UR Supplementary Protector 0.5A, 2 Pole, 480Y/277V AC, D Trip, UL1077 | Altech Corp. | | |
| 2D4UR Supplementary Protector 4A, 2 Pole, 480Y/277V AC, D Trip, UL1077 | Altech Corp. | | |
| 2D32UR Supplementary Protector 32A, 2 Pole, 480Y/277V AC, D Trip, UL1077 | Altech Corp. | | |