​The Numens SNC-300-S2 is a non-addressable photoelectric smoke detector designed for early fire detection in various applications. Below are its key specifications:​

• Operating Voltage: DC 10.8 V to 33 V

• Start-up Current: ≤ 100 µA​

• Start-up Time: ≤ 30 seconds​

• Quiescent Current: ≤ 75 µA​

• Alarm Current (max): 50 mA​

• Sampling Time: 3 to 5 seconds​

• Alarm Response Threshold: 0.08 to 0.15 dB/m​

• Alarm Indicator: Dual red LEDs for 360° visibility​

• Reset Voltage: ≤ 1 V

• Reset Time: ≤ 5 seconds​

• Operating Temperature: -10°C to +55°C​

• Operating Humidity: 0% to 95% RH, non-condensing

• Storage Temperature: -25°C to +80°C

• Storage Humidity: 0% to 98% RH, non-condensing​

• Dimensions (excluding contacts): Diameter 102 mm × Height 34 mm

• Ingress Protection Rating: IP42