Siemens Low Voltage s Surge Protection Devices Line of TPS309 as part of the External (Remote Mounted) Group. Type 1 SPD. Dimensions (L x W x H) 8.3 x 3.6 x 3.0. 3-Phase 4-Wire Rated 277/480 V surge current 100 kA per phase. Special features dry contact and auible alarm, internal mountin in P1, P2 panels (requires TPS0IKITP1 or TPS0IKITP2, mounts internal to P1 panelboards and busway
Siemens TPS3E0910DI0 TPS3 09 Type 1 External Low Voltage Surge Protective Device With Dry Contact, Audible Alarm, 277/480 VAC, 47 to 63 Hz, 200 kA SCCR, 3 Phase
TPS3 09 is a UL 1449 4th Edition 100 kA Type 1 compact multi-mode surge protective device that can be installed on either the line or load side of the electrical service. When installed at the electrical service entrance, it can be used for UL 96A compliance (at 20 kA In).