Eltako ESR12NP-230V+UC Impulse Switch 1 NO Contact Potential-Free 16A DIN Rail

Lighting circuits often suffer from relay chatter, premature contact wear, and the need for separate control voltages. The Eltako ESR12NP-230V+UC impulse switch solves this by combining a robust latching relay with universal control voltage and zero-crossing switching, ensuring silent, durable operation for staircases, corridors, and large lighting groups.

Who is it for

Electricians, facility managers, and building automation specialists who need a reliable, space-saving impulse switch for residential or commercial installations. It is ideal for controlling lighting from multiple pushbuttons without complex wiring.

Main features

• 1 normally open (NO) potential-free contact rated 16 A / 250 V AC
• Universal control voltage 8–230 V AC/DC (UC) for flexible integration
• Zero-crossing switching reduces inrush currents and extends contact life
• Compact 1 TE (18 mm) DIN rail housing saves panel space
• Supports glow lamp currents up to 150 mA for illuminated pushbuttons
• High mechanical endurance: 10 million operations
• Low standby power loss of only 0.8 W

Specifications

• Product type: Impulse switch / latching relay
• Number of contacts: 1 NO
• Contact configuration: Potential-free
• Rated switching current: 16 A
• Rated switching voltage: 250 V AC
• Control voltage: 230 V AC (also universal 8–230 V AC/DC)
• Mounting type: DIN rail
• Module width: 1 TE (18 mm)
• Max. glow lamp current: 150 mA
• Standby power loss: 0.8 W
• Switching principle: Zero-crossing switching
• Electrical life: 100,000 operations at 16 A
• Mechanical life: 10 million operations
• Operating temperature: -20 °C to +50 °C
• Protection class: IP20
• Terminal type: Screw terminals
• Max. switching frequency: 600 operations/hour

Tips

For optimal performance, ensure the control voltage matches the universal range and use appropriate wire sizes for screw terminals. The zero-crossing feature is especially beneficial for LED lighting to prevent flicker and extend lamp life.