Connector Bosch Round vs Connector DC Barrel: specs compared
Updated 05 September 2026.
5
specs differ
Connector Bosch Round and Connector DC Barrel differ on 5 specs: pins / contacts, current rating, voltage range, locking, common uses.
| Spec | Connector Bosch Round | Connector DC Barrel |
|---|---|---|
| Pins / contacts | keyed round contact, smart-system specific | 2 conductors: centre pin and outer barrel, no data pin |
| Current rating | 4 A on the standard smart-system charger | typically up to about 5 A, best for lower-power packs |
| Voltage range | 36 V nominal pack | common on 36 V to 54.6 V charge outputs |
| Locking | keyed round, smart-system only | non-locking, friction fit |
| Common uses | Bosch smart system (BES3) PowerTube, CompactTube, PowerPack and PowerMore batteries | budget and mid-range e-bikes, scooters and many hub-motor packs |
Questions and answers
How do Connector Bosch Round and Connector DC Barrel compare?
Connector Bosch Round and Connector DC Barrel differ on 5 specs: pins / contacts, current rating, voltage range, locking, common uses.