PLT-SEC Surge & Overcurrent Protectors Phoenix Contact PLT-SEC Surge and Overcurrent Protectors offer ideal surge protection for power applications from 24VAC/DC to 230VAC/DC. Phoenix Contact PLT-SEC includes a 120V product with a UL Type 2 listing approval. This UL listing provides smoother and more time- and cost-effective integration of products into new and existing applications. Phoenix Contact PLT-SEC surge suppressors feature a slim 17.7mm DIN rail footprint along with local and remote status indication. The series also offers pluggable, hot-swappable capability for easier maintenance.