SM13126PEL LAN 10/100 Base-Tx VoIP PoE Transformer Bourns SM13126PEL LAN 10/100 Base-Tx VoIP Power over Ethernet (PoE) Transformer is a single-port, potted construction LAN 10/100 Base-Tx VoIP and IEEE 802.3 compliant transformer for Ethernet applications. Bourns SM13126PEL LAN transformer is PoE capable with an extended operating temperature range of -40°C to +85°C and 1.5kVRMS isolation voltage.