SPD-S-series
Tworth SPD-S series surge protector, single channel, connection mode: parallel, protection level: 10KV, 5KA
SPD-D-series
Tworth SPD-D-M2 series surge protector, dual channels, connection mode: parallel, protection level: 10KV, 5KA
SPD-P-series
Tworht SPD-S-M2 series surge protector, single channel, connection mode: series, protection level: 10KV, 5KA