Our serial surge protectors meet high demand specifications with three stage protection for maximum safety: a gas discharge tube feeds to a series resistor and a TVS (Transient Voltage Suppressor) for each supported line. IEEE 1000-4-5: 1995 and IEEE C62.41-1991 are the recognized standards for top quality, heavy duty serial surge protectors.
| Part# | Description |
| BB-HESP4DR | RS-422/485 Dataline Surge Suppressor |
| BB-485HESP | Serial Surge Protector, RS-485 Data Line, 3 Stage |
| BB-232HESP | Serial Surge Protector, RS-232 Data Line, 3 Stage |
| BB-422HESP | Serial Surge Protector, RS-422 Data Line, 3 Stage |
| BB-CANOP | Serial Isolator with CAN Terminal Block |