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20.24.8.024.4000 Finder step relay 2 phase switch 2NO 24V
Finder 20.24.8.024.4000 is a four-sequence 16 A modular step relay with two normally open silver tin oxide contacts, a 24 V AC coil and 35 mm DIN-rail mounting.
Why Choose the Finder 20.24.8.024.4000 Modular Step Relay?
The Finder 20.24.8.024.4000 is a compact and dependable four-sequence modular step relay designed for impulse-controlled switching in lighting, building automation and electrical distribution applications. As part of the Finder Series 20, it advances through its switching sequence whenever the coil receives a momentary control pulse.
Its electromechanical latching operation enables two circuits to be controlled sequentially from momentary push-buttons without requiring the coil to remain continuously energised. A mechanical position indicator and test button support convenient inspection and manual operation during installation, commissioning and maintenance.
With two normally open contacts rated at 16 A, a 24 V AC coil and silver tin oxide contacts, the 20.24.8.024.4000 provides dependable sequential control of compatible lighting and electrical loads. Its 17.4 mm-wide enclosure mounts directly onto a 35 mm DIN rail inside distribution boards and control panels.
Key Advantages
- Impulse-operated four-sequence modular step relay.
- Two normally open contacts rated at 16 A.
- 24 V AC control coil for low-voltage control circuits.
- Four-step sequence provides flexible two-circuit control.
- Latching operation does not require continuous coil energisation.
- Compact DIN-rail format supports space-efficient panel installation.
Key Features
- Finder Series 20 modular step relay.
- Four-step switching sequence.
- Two normally open contacts.
- 16 A rated current and 30 A maximum peak current.
- 24 V AC, 50/60 Hz coil.
- 4000 VA AC-1 rated load.
- Integrated mechanical indicator and test button.
- Direct mounting on a 35 mm DIN rail.
Flexible Sequential Control for Lighting and Electrical Loads
A four-sequence step relay advances through a defined contact sequence each time a momentary voltage pulse is applied to its coil. This provides flexible control of two electrical circuits from one or more push-button locations without continuous coil energisation.
The Finder Series 20 is designed for installation in modular distribution equipment. Its sequential latching mechanism, silver tin oxide contacts, mechanical indication and manual test facility make the 20.24.8.024.4000 suitable for dependable multi-circuit lighting and building-control applications.
Typical Applications
- Sequential control of two lighting circuits.
- Lighting systems operated from multiple push-buttons.
- Residential and commercial building automation.
- Stairwell, corridor and communal-area lighting.
- Electrical distribution boards.
- Industrial control panels.
Technical Specifications
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| Device Type | Latching / Impulse Relay | |
|---|---|---|
| Terminal Type | Screw | |
| Load Voltage | 400 V AC | |
| Mounting Type | DIN rail | |
| Switching Current (A) | 16 A | |
| Coil / Supply Voltage | 24 V AC | |
| Contacts | 4NO | |
| IP Rating | IP20 | |
| Manufacturer | Finder | |
| Series | Series 20 | |
| Model | 20.24.8.024.4000 | |
| Product type | Modular step relay | |
| Relay function | Impulse / latching | |
| Number of steps | 4 | |
| Contact configuration | 2 NO, DPST-NO | |
| Rated current | 16 A | |
| Maximum peak current | 30 A | |
| Rated contact voltage | 250 V AC | |
| Maximum switching voltage | 400 V AC | |
| Rated load, AC-1 | 4000 VA | |
| Rated load, AC-15 at 230 V AC | 750 VA | |
| Coil voltage | 24 V AC, 50/60 Hz | |
| Coil operating range | 20.4–26.4 V AC | |
| Coil resistance | 27 Ω | |
| Coil current | 275 mA | |
| Rated coil power | 6.5 VA | |
| Contact material | Silver tin oxide (AgSnO2) | |
| Minimum switching load | 1000 mW (10 V / 10 mA) | |
| Minimum / maximum impulse duration | 0.1 s / 1 h | |
| Mechanical life | 300,000 cycles | |
| Electrical life at rated AC-1 load | 100,000 cycles | |
| Coil-to-contact impulse withstand voltage | 4 kV | |
| Operating temperature | −40 to +40 °C | |
| Protection rating | IP20 | |
| Width | 17.4 mm | |
| Mounting type | 35 mm DIN rail | |
| Terminal type | Screw terminals |
Frequently Asked Questions
What is the Finder 20.24.8.024.4000 used for?
It is used for four-sequence impulse control of two lighting or electrical circuits from momentary push-buttons.
How many switching steps does this relay provide?
The Finder 20.24.8.024.4000 provides a four-step switching sequence.
What is the contact current rating?
The relay has a rated current of 16 A and a maximum peak current of 30 A.
What coil voltage does the relay require?
This exact variant has a 24 V AC, 50/60 Hz coil with an operating range of 20.4–26.4 V AC.
How is the relay installed?
The relay is designed for direct mounting on a 35 mm DIN rail and uses screw terminals for field wiring.
Trusted by Electrical Installers Worldwide
Finder Series 20 modular step relays are widely used by electrical installers, panel builders and building-control professionals for dependable impulse switching and space-efficient DIN-rail installation.
