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                                | Product Name | 
                                                Eaton Distribution parts
                                             | 
| Catalog Number | 
                                                121990
                                             | 
| Product Length/Depth | 
                                                991 mm
                                             | 
| Product Height | 
                                                37 mm
                                             | 
| Product Width | 
                                                22 mm
                                             | 
| Product Weight | 
                                                0.792 kg
                                             | 
| Compliances | 
                                                RoHS conform
                                             | 
| Catalog Notes | 
                                                100A
                                             | 
| Used with | 
                                                Busbar  BB-UL | 
| Type | 
 | 
| Features | 
                                                Insulated  Can be cut to size | 
| Accessory/spare part type | 
                                                Busbar for miniature circuit breaker
                                             | 
| Electric connection type | 
                                                Pin
                                             | 
| Rated operational current for specified heat dissipation (In) | 
                                                100 A
                                             | 
| Rated surge voltage | 
                                                10 KV
                                             | 
| Rated uninterrupted current (Iu) | 
                                                100 A
                                             | 
| Static heat dissipation, non-current-dependent | 
                                                0 W
                                             | 
| Suitable for number of devices | 
                                                56
                                             | 
| Application | 
                                                Switchgear for industrial and advanced commercial applications
                                             | 
| Number of poles | 
                                                Fifty-six-pole
                                             | 
| Color | 
                                                Other
                                             | 
| Rated short-time withstand current (Icw) | 
                                                0 kA
                                             | 
| Ambient operating temperature - max | 
                                                100 °C
                                             | 
| Ambient operating temperature - min | 
                                                -5 °C
                                             | 
| Cross section | 
                                                25 mm²
                                             | 
| Heat dissipation capacity | 
                                                0 W
                                             | 
| Heat dissipation per pole, current-dependent | 
                                                0 W
                                             | 
| Number of modular spacings | 
                                                56
                                             | 
| Number of phases | 
                                                2
                                             | 
| Pitch dimensions | 
                                                0 mm
                                             | 
| Rated operational voltage (Ue) - max | 
                                                277 V
                                             | 
| Rated conditional short-circuit current (Iq) | 
                                                10 kA
                                             | 
| Functions | 
                                                Busbar
                                             | 
| Suitable for | 
                                                56 devices
                                             |