Technical Parameters Parameter Specification / Value Standards Compliance IEC/EN 61643-11, IEC 61643-31, IEC 60099-4, IEEE C62.41 Protection Classification Type 1 + Type 2 Combined (Class I + II) System Configuration 690 V AC, 3P+N+PE (TN-S, IT, TT systems) Rated Voltage (Un) 690 V AC (±10%) Maximum Continuous Voltage (Uc) 480 V AC (L-N) / 830 V AC (L-L) Lightning Impulse Current (Iimp) 10/350 µs 35 kA (per mode, all poles) Nominal Discharge Current (In) 8/20 µs 72 kA (per mode) Maximum Discharge Current (Imax) 8/20 µs 120 kA (per mode) Voltage Protection Level (Up) @ In ≤ 3.5 kV (Line-Neutral) Total Discharge Capacity >150 kJ per phase Response Time < 15 ns (primary clamping stage) Follow Current Interruption < 2 ms (spark gap recovery) Short-Circuit Withstand 80 kA RMS (1 second) Recommended Backup Protection 315A-400A gL/gG fuse or equivalent MCCB (see installation manual) Connection Terminals Line/Neutral: 70-185 mm² Earth/PE: 95-185 mm² (copper) Auxiliary Contacts 2 independent changeover contacts (5A/250V AC) Housing Protection IP20 / NEMA 1 (indoor cabinet installation) Operating Temperature -45°C to +85°C (full performance range) Storage Temperature -50°C to +90°C Altitude Rating Up to 5000 m without derating Relative Humidity 5-95% (non-condensing) Seismic Rating IEEE 693 (High Level) - 1.0g horizontal, 0.8g vertical Status Indication Multi-color visual indicator (green/amber/red) with remote contact signaling Mounting Heavy-duty DIN-rail (35/45 mm) or direct panel mounting with anti-vibration mounts Dimensions (H×W×D) ~ 420 × 135 × 105 mm (verify with official datasheet) Weight Approximately 6.2 kg Model Decoding PSTX: Premium surge protection series 720: Discharge capacity (72 kA In) 600: Iimp = 35 kA 70: Generation variant