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PSTB170-600-70

The ABB PSTB170-600-70 is a Type 1+2 Combined Surge Protective Device (SPD) from ABB's PSTB series, engineered for 400V AC three-phase power systems. This device functions as primary surge protection at service entrances and main distribution boards, offering robust defense against both direct lightning strikes and high-energy switching surges.

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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 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 17.0 kA (per mode) Maximum Discharge Current (Imax) 8/20 µs 40 kA (per mode) Voltage Protection Level (Up) @ In ≤ 2.0 kV (Line-Neutral) Response Time < 100 ns Short-Circuit Withstand According to IEC 61643-11 Recommended Backup Protection 100A gL/gG fuse or equivalent circuit breaker (verify with installation manual) Connection Terminals Line/Neutral: 16-50 mm² Earth/PE: 25-50 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/red) Mounting DIN-rail mountable (35 mm) Dimensions (H×W×D) ~ 288 × 72 × 62 mm (confirm with official datasheet) Weight Approximately 2.0 kg Model Interpretation PSTB: Product series 170: Discharge capacity (17.0 kA In) 600: Iimp = 25 kA 70: Configuration variant