CHINT CU-CZ 1U DC Surge Protective Device (SPD),
provides reliable lightning and transient overvoltage protection for low-voltage DC and telecommunication systems.
furthermore Built to IEC/EN 61643-31 and YD/T 1235 standards,
in addition it effectively shields DC −48 V circuits and return paths from surge energy up to 40 kA. The modular plug-in design simplifies maintenance,
while optional auxiliary contacts support remote signaling. Compact, flame-retardant,
and rated for −45 °C to +85 °C, the CU-CZ 1U DC SPD ensures durable, intelligent surge protection.
- Standards & Certifications: IEC/EN 61643-31 | YD/T 1235.1/1235.2 | CE | TLC | RoHS
- Poles: 1P + N
- Test Class: Type I + II (CU-I+II 6.25CZ) / Type II (CU-II 40CZ)
- Protection Mode: −48 V ~ RTN and RTN ~ PE paths
- Maximum Impulse Current (Iimp, 10/350 µs): 6.25 kA (Type I + II)
- Maximum Discharge Current (Imax, 8/20 µs): 40 kA
- Nominal Discharge Current (In, 8/20 µs): 20 kA
- Maximum Continuous Operating Voltage (Uc): 75 V DC
- Voltage Protection Level (Up): 600 V (−48 V~RTN) / 1000 V (RTN~PE)
- Residual Voltage at 10 kA (Ures): 400 V / 1000 V
- Response Time: ≤ 25 ns (−48 V~RTN) | ≤ 100 ns (RTN~PE)
- Fault Indication: Green = Normal / Red = Fault
- Auxiliary Contact Option: NC (normal) → NO (on failure) | 75 V DC 0.5 A capacity
- Protection Degree: IP20 | Flame Retardant UL 94 V-0
- Environmental Range: −45 °C ~ +85 °C | Relative Humidity 5–95 % RH
- Dimensions: 125 × 19.6 × 40 mm
- Mounting: Plug-in design with anti-pull buckle for quick installation and removal.
