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PSTB210-600-70

The ABB PSTB210-600-70 is a Type 1+2 Combined Surge Protective Device (SPD) from ABB's PSTB series, designed for 400V AC three-phase power systems. It functions as primary surge protection at main distribution boards and service entrances, offering enhanced protection capacity against direct lightning strikes and severe switching surges in commercial and industrial electrical installations.

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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) 255 V AC (L-N) / 320 V AC (L-L) Lightning Impulse Current (Iimp) 10/350 µs 25 kA (per mode) Nominal Discharge Current (In) 8/20 µs 21.0 kA (per mode) Maximum Discharge Current (Imax) 8/20 µs 50 kA (per mode) Voltage Protection Level (Up) @ In ≤ 2.2 kV (Line-Neutral) Response Time < 100 ns Short-Circuit Withstand According to IEC 61643-11 (typically 25 kA) Recommended Backup Protection 125A gL/gG fuse or equivalent circuit breaker (verify with installation manual) Connection Terminals Line/Neutral: 16-70 mm² Earth/PE: 25-70 mm² (copper) Auxiliary Contacts Not standard (optional accessory may be available) Housing Protection IP20 (for indoor enclosure mounting) Operating Temperature -40°C to +80°C Storage Temperature -40°C to +85°C Status Indication Visual window with color flag (green=OK, red=fault) Mounting DIN-rail mountable (35 mm) Dimensions (H×W×D) ~ 288 × 90 × 75 mm (confirm with official datasheet) Weight Approximately 2.8 kg Model Interpretation PSTB: Product series 210: Discharge capacity (21.0 kA In) 600: Iimp = 25 kA 70: Configuration variant