| 2DU30R Supplementary Protector 30A, 2 Pole, 277V AC, D Trip, UL1077 | Altech Corp. | | |
| 2DU60R Supplementary Protector 60A, 2 Pole, 277V AC, D Trip, UL1077 | Altech Corp. | | |
| 3CU2R Supplementary Protector 2A, 3 Pole, 277V AC, C Trip, UL1077 | Altech Corp. | | |
| 3CU6R Supplementary Protector 6A, 3 Pole, 277V AC, C Trip, UL1077 | Altech Corp. | | |
| 3CU8R Supplementary Protector 8A, 3 Pole, 277V AC, C Trip, UL1077 | Altech Corp. | | |
| 3CU10R Supplementary Protector 10A, 3 Pole, 277V AC, C Trip, UL1077 | Altech Corp. | | |
| 3CU12R Supplementary Protector 12A, 3 Pole, 277V AC, C Trip, UL1077 | Altech Corp. | | |
| 3CU25R Supplementary Protector 25A, 3 Pole, 277V AC, C Trip, UL1077 | Altech Corp. | | |
| 3CU40R Supplementary Protector 40A, 3 Pole, 277V AC, C Trip, UL1077 | Altech Corp. | | |
| 3CU50R Supplementary Protector 50A, 3 Pole, 277V AC, C Trip, UL1077 | Altech Corp. | | |