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PSTB470-600-70

The ABB PSTB470-600-70 is a High-Capacity Type 1+2 Combined Surge Protective Device (SPD) from ABB's PSTB series, engineered for 400V AC three-phase power systems. This device represents the upper tier of surge protection for critical infrastructure, providing maximum surge current handling capability against direct lightning strikes and extreme switching surges in commercial and industrial applications.

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Technical Parameters Parameter Specification / Value Standard Compliance IEC/EN 61643-11 Protection Classification Type 1 + Type 2 Combined (Class I + II) System Configuration 400 V AC, 3P+N (TN-S, TT, TN-C-S systems) Rated Voltage (Un) 400 V AC (±10%) Maximum Continuous Voltage (Uc) 320 V AC (L-N) / 420 V AC (L-L) Lightning Impulse Current (Iimp) 10/350 µs 25 kA (per mode) Nominal Discharge Current (In) 8/20 µs 47.0 kA (per mode) Maximum Discharge Current (Imax) 8/20 µs 100 kA (per mode) Voltage Protection Level (Up) @ In ≤ 2.5 kV (Line-Neutral) Response Time < 100 ns Short-Circuit Withstand According to IEC 61643-11 (typically 50 kA) Recommended Backup Protection 250A gL/gG fuse or equivalent circuit breaker (verify with installation manual) Connection Terminals Line/Neutral: 50-150 mm² Earth/PE: 70-150 mm² (copper) Auxiliary Contacts Optional remote signaling contact (1 NO/NC changeover) Housing Protection IP20 (for indoor enclosure mounting) Operating Temperature -40°C to +85°C Storage Temperature -40°C to +90°C Status Indication Visual window with color flag (green=OK, red=fault) + optional remote signaling Mounting DIN-rail mountable (35/45 mm) or direct panel mounting Dimensions (H×W×D) ~ 360 × 110 × 85 mm (confirm with official datasheet) Weight Approximately 4.5 kg Model Interpretation PSTB: Product series 470: Discharge capacity (47.0 kA In) 600: Iimp = 25 kA 70: Configuration variant