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ETU5-T2-20 Series AC Surge Protective Device is designed for surge protection in low-voltage power distribution systems. With Type 2 / Class II protection, In 10kA (8/20μs), and Imax 20kA (8/20μs), it provides reliable protection against lightning-induced surges and switching overvoltages in building and industrial distribution applications.
The product features a keyed N-PE module design and a removable arc-safe barrier to help prevent incorrect replacement while improving installation safety and maintenance convenience. Its appearance and mounting dimensions are consistent with T Series devices, allowing side-byside installation and a uniform panel layout.
| ① | ETEK | ⑤ | Imax: 20kA |
| ② | T series | ⑥ | No. of Poles: 2:2P; 3:3P; 4:4P; 1PN:1P+NPE; 3PN:3P+NPE |
| ③ | SPD series No.5 | ⑦ | Uc: 150:150V; 275:275V; 320:320V; 385:385V; 440:440V |
| ④ | Class II / Type 2 | ⑧ | With Remote Signaling |
| No. of poles | 2P | 3P | 4P | 1P+NPE | 3P+NPE |
| Network systems | TN-S | TN-C | TN-S | TT, TN-S | |
| Mode of protection | L-PE, N-PE | L-PEN | L-PE, N-PE | L-N, N-PE | |
| Protective elements | High Energy MOV | High Energy MOV and GDT | |||
| Maximum continuous operating voltage (L-N) |
Uc | 150V | 275V | 320V | 385V | 440V |
| Maximum continuous operating voltage (N-PE) |
Uc | 255V | ||||
| Nominal discharge current (8/20μs) (L-N)/(N-PE) |
In | 7kA | ||||
| Maximum discharge current (8/20μs) (L-N)/(N-PE) |
Imax | 20kA | ||||
| Voltage protection level (L-N)/(N-PE) |
Up | 0.8kV/ 1.5kV | 1.0kV/ 1.5kV | 1.2kV/ 1.5kV | 1.45kV/ 1.5kV | 1.6kV/ 1.5kV |
| Voltage protection level 5kA | Up | 0.5kV | 0.8kV | 1.0kV | 1.2kV | 1.4kV |
| Response time (L-N)/(N-PE) | tA | ≤25ns/ ≤100ns | ||||
| Operating temperature range | Tu | -40℃ to +80℃ | ||||
| Max. Back-up fuse | 125A gL/gG | |||||
| Operating state/fault indication | Operating state/fault indication Green/Red(L-N), Yellow(N-PE) | |||||
| Cross-section area (Min.)/(Max.) |
4mm²/35mm² | |||||
| Mounting | 35mm DIN Rail, EN 60715 | |||||
| Enclosure material | Thermal Plastic UL94-V0 | |||||
| Degree of protection | IP20 (built-in) | |||||
| Remote contacts (RC) | Optional | |||||
| RC switching capacity | AC: 250V/0.5A; DC: 250V/0.1A; 125V/0.2A; 75V/0.5A | |||||
| RC conductor cross-section (max.) |
16 AWG (Solid) / 1.5mm² (Solid) | |||||
| Max. continuous operating AC voltage | |||||
| No. of poles | 150V | 275V | 320V | 385V | 440V |
| 2P | ETU5-T2-20-2P150 | ETU5-T2-20-2P275 | ETU5-T2-20-2P320 | ETU5-T2-20-2P385 | ETU5-T2-20-2P440 |
| 3P | ETU5-T2-20-3P150 | ETU5-T2-20-3P275 | ETU5-T2-20-3P320 | ETU5-T2-20-3P385 | ETU5-T2-20-3P440 |
| 4P | ETU5-T2-20-4P150 | ETU5-T2-20-4P275 | ETU5-T2-20-4P320 | ETU5-T2-20-4P385 | ETU5-T2-20-4P440 |
| 1P+NPE | ETU5-T2-20-1PN150 | ETU5-T2-20-1PN275 | ETU5-T2-20-1PN320 | ETU5-T2-20-1PN385 | ETU5-T2-20-1PN440 |
| 3P+NPE | ETU5-T2-20-3PN150 | ETU5-T2-20-3PN275 | ETU5-T2-20-3PN320 | ETU5-T2-20-3PN385 | ETU5-T2-20-3PN440 |
| With Remote Signaling | |||||
| No. of poles | 150V | 275V | 320V | 385V | 440V |
| 2P | ETU5-T2-20-2P150S | ETU5-T2-20-2P275S | ETU5-T2-20-2P320S | ETU5-T2-20-2P385S | ETU5-T2-20-2P440S |
| 3P | ETU5-T2-20-3P150S | ETU5-T2-20-3P275S | ETU5-T2-20-3P320S | ETU5-T2-20-3P385S | ETU5-T2-20-3P440S |
| 4P | ETU5-T2-20-4P150S | ETU5-T2-20-4P275S | ETU5-T2-20-4P320S | ETU5-T2-20-4P385S | ETU5-T2-20-4P440S |
| 1P+NPE | ETU5-T2-20-1PN150S | ETU5-T2-20-1PN275S | ETU5-T2-20-1PN320S | ETU5-T2-20-1PN385S | ETU5-T2-20-1PN440S |
| 3P+NPE | ETU5-T2-20-3PN150S | ETU5-T2-20-3PN275S | ETU5-T2-20-3PN320S | ETU5-T2-20-3PN385S | ETU5-T2-20-3PN440S |
