| 1D3UR Supplementary Protector 3A, 1 Pole, 277V AC, D Trip, UL1077 | Altech Corp. | | |
| 1D15UR Supplementary Protector 15A, 1 Pole, 277V AC, D Trip, UL1077 | Altech Corp. | | |
| 1D20UR Supplementary Protector 20A, 1 Pole, 277V AC, D Trip, UL1077 | Altech Corp. | | |
| 1D30UR Supplementary Protector 30A, 1 Pole, 277V AC, D Trip, UL1077 | Altech Corp. | | |
| 1D50UR Supplementary Protector 50A, 1 Pole, 277V AC, D Trip, UL1077 | Altech Corp. | | |
| 1D63UR Supplementary Protector 63A, 1 Pole, 277V AC, D Trip | Altech Corp. | | |
| 2C3UR Supplementary Protector 3A, 2 Pole, 480Y/277V AC, C Trip, UL1077 | Altech Corp. | | |
| | ABB Control | | |
| ST203M-D1.6NA Supplementary Curcuit Protector, 3 pole, 1.6 Amp, 277 VAC, D Curve, UL 1077, w/N... | ABB Control | | |
| ST203M-K1NA Supplementary Curcuit Protector, 3 pole, 1.0 Amp, 277 VAC, K Curve, UL 1077, w/N... | ABB Control | | |