Finder 20.21.9.024.4000 Impulse Relay, 1 NO, 20 A, 24 V DC Coil, DIN Rail

Handles 20 A loads with a single NO contact, making it a robust choice for lighting and control circuits. The 24 V DC coil keeps control power low at 1.5 W while the relay latches mechanically, so it holds state without continuous coil voltage.

Overview

The Finder 20.21.9.024.4000 is a DIN-rail mounted impulse relay (latching relay) with one normally open contact rated for 20 A at 250 V AC. It is designed for applications where a momentary pulse toggles the load state, such as stairwell lighting or multi-point switching. The relay fits a single 17.5 mm module on standard DIN rails, saving space in distribution boards.

What stands out

• High current capacity: 20 A contacts switch up to 5000 VA AC1.
• Low coil consumption: only 1.5 W at 24 V DC, reducing heat and energy use.
• Durable contacts: AgSnO2 material ensures long life under load.
• Compact footprint: one module width (17.5 mm) for efficient panel use.
• Wide operating temperature: -40 to +40 °C for demanding environments.

Technical details

• Contact configuration: 1 NO (SPST-NO)
• Rated contact current: 20 A
• Rated contact voltage: 250 V AC
• Coil voltage: 24 V DC
• Coil power consumption: 1.5 W
• Mounting: DIN rail
• Module width: 1 module (17.5 mm)
• Contact material: AgSnO2
• Electrical life (at rated load): 100,000 cycles
• Mechanical life: 1,000,000 cycles
• Operating temperature range: -40 to +40 °C
• Terminal type: screw terminals
• Max. wire size: 6 mm² solid, 4 mm² stranded
• Max. switching voltage: 400 V AC
• Max. switching power (AC1): 5000 VA

Our verdict

A reliable latching relay for 20 A loads, combining compact DIN-rail mounting with low coil power. Ideal for lighting control and industrial automation where space and energy efficiency matter.