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26.02.8.012.4000 Finder Step relay 2 Phase switch 2NO AC 12V
Finder 26.02.8.012.4000 Series 26 electromechanical impulse relay with a 10 A contact rating, 12 V AC operating coil, two normally open contacts and bistable step-switching operation for multi-point lighting and electrical circuit control.
£11.02
Why Choose the Finder 26.02.8.012.4000 Impulse Relay?
The Finder 26.02.8.012.4000 is a compact 10 A electromechanical impulse relay designed for convenient switching of lighting and electrical circuits from one or more push-button control points. Part of the Finder Series 26 step relay range, this device features a 12 V AC operating coil and two normally open (2 NO) contacts, making it a practical solution for residential, commercial and light industrial electrical installations.
Unlike a conventional monostable relay, the Finder 26.02.8.012.4000 uses a bistable stepping mechanism that changes the contact state whenever an appropriate electrical impulse is applied to the coil. Once switched, the contacts remain in their new position without continuous coil energisation. This makes impulse relays particularly useful for controlling lighting from multiple momentary push buttons while reducing the need for conventional multi-way switching arrangements.
The relay combines a 10 A contact rating, 250 V AC rated contact voltage and 12 V AC coil supply in a compact housing suitable for installation behind blanking plates and within appropriate electrical mounting boxes. Its electrically separate coil and contact circuits, box-clamp screw terminals and cadmium-free contact construction support straightforward installation and reliable operation.
Key Advantages
- 10 A impulse relay for reliable lighting and electrical circuit control.
- 12 V AC operating coil suitable for compatible low-voltage push-button control systems.
- Two normally open contacts (2 NO) allow two circuits to be switched together.
- Bistable stepping operation maintains the selected contact state without continuous coil power.
- Impulse control enables convenient switching from multiple momentary push buttons.
- 250 V AC rated contact voltage for compatible mains-voltage loads.
- 10 A rated contact current supports a range of lighting and general electrical loads.
- Electrically separate coil and contact circuits allow low-voltage control of suitable higher-voltage loads.
- Compact housing supports installation in appropriate mounting boxes and concealed electrical spaces.
- Box-clamp screw terminals provide secure electrical connections.
- Cadmium-free contact material supports modern electrical installation requirements.
- IP20 protection rating for installation within suitable indoor electrical enclosures.
Key Features
- Finder Series 26 electromechanical step relay.
- Type 26.02 double-pole impulse switching.
- 10 A rated contact current.
- 12 V AC nominal coil voltage.
- 50/60 Hz AC coil operation.
- 2 NO contact configuration.
- 250 V AC rated contact voltage.
- 2500 VA rated AC-1 switching capacity.
- 500 VA rated AC-15 switching capacity.
- 200 A specified inrush current capability under the manufacturer's stated conditions.
- 4.8 VA nominal AC coil consumption.
- Impulse-operated bistable mechanism.
- Two-state switching sequence for simultaneous control of both contacts.
- Minimum control impulse duration of 0.1 s.
- 300,000-operation mechanical life under specified conditions.
- 100,000-operation electrical life at the rated AC-1 load.
- IP20 protection rating.
- −40 to +40 °C ambient operating temperature range.
- Box-clamp terminal connections.
Lighting load ratings are nominal manufacturer values. Actual suitability depends on lamp quantity, driver characteristics, switching inrush current and the installation conditions.
Bistable Impulse Switching for Multi-Point Lighting Control
The Finder 26.02.8.012.4000 operates using an electromechanical stepping mechanism rather than requiring continuous power to hold its contacts in position. When a suitable 12 V AC impulse is applied to the coil, both normally open contacts change state. A subsequent impulse changes them back. The relay therefore maintains its selected switching position between control signals.
This operation is particularly useful for multi-point lighting control. Several momentary push buttons can be connected into an appropriately designed control circuit, allowing the same lighting installation to be switched from different locations. Applications include corridors, stairways, hallways, offices and shared building spaces.
The 2 NO configuration provides two switching contacts that operate together. This allows two compatible lighting groups or electrical circuits to be controlled by the same sequence of impulses, subject to the relay's individual contact ratings and the installation design.
12 V AC Control with Separate Load Switching
The Finder 26.02.8.012.4000 uses a 12 V AC operating coil, enabling compatible low-voltage push-button control arrangements. The coil circuit is electrically separate from the switching contacts, allowing the relay to control suitable mains-voltage electrical loads without requiring the control push buttons to carry the load current.
Because the relay is impulse-operated, the coil does not need to remain continuously energised to maintain the selected contact state. This distinguishes it from conventional monostable installation relays and makes it a practical solution for push-button-controlled lighting systems.
The Series 26 construction is intended for installation in suitable mounting boxes and protected electrical spaces. Its screw terminals and compact format support integration into new electrical installations and appropriate refurbishment projects.
Typical Applications
- Residential lighting control systems.
- Staircase and corridor lighting.
- Hallway and landing lighting circuits.
- Multi-point push-button switching arrangements.
- Commercial office lighting installations.
- Schools and shared building areas.
- Hotel and hospitality lighting control.
- Two-circuit lighting control using a single impulse signal.
- Low-voltage control of compatible mains-powered loads.
- Electrical refurbishment and modernisation projects.
- Building automation using electromechanical step relays.
- General electrical switching applications requiring maintained contact states.
Technical Specifications
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| Device Type | Latching / Impulse Relay | |
|---|---|---|
| Timing Function | Pulse | |
| Switching Current (A) | 10 A | |
| Terminal Type | Screw | |
| Manufacturer | Finder | |
| Series | 26 Series Step Relays | |
| Type | 26.02 | |
| Model | 26.02.8.012.4000 | |
| Product type | Electromechanical impulse / step relay | |
| Operating principle | Bistable, impulse-operated | |
| Number of poles | 2 | |
| Contact configuration | 2 NO (DPST-NO) | |
| Normally open contacts | 2 | |
| Switching sequence | Both contacts change state together with successive control impulses | |
| Rated contact current | 10 A | |
| Rated contact voltage | 250 V AC | |
| Rated AC-1 switching capacity | 2500 VA | |
| Rated AC-15 switching capacity | 500 VA | |
| Specified inrush current | 200 A | |
| Specified inrush energy (I²t) | 16 A²s | |
| Nominal coil voltage | 12 V AC | |
| Coil voltage type | AC | |
| Coil frequency | 50/60 Hz | |
| Nominal coil consumption | 4.8 VA at 50 Hz | |
| Coil operating range at 50 Hz | 80–110% of nominal voltage | |
| Coil operating range at 60 Hz | 85–110% of nominal voltage | |
| Minimum impulse duration | 0.1 s | |
| Maximum impulse duration | 1 h, subject to the manufacturer's specified conditions | |
| Mechanical life | 300,000 operations | |
| Electrical life at rated AC-1 load | 100,000 operations | |
| Nominal incandescent / halogen lamp rating | 1800 W | |
| Nominal LED lamp rating | 300 W | |
| Nominal LED surface luminaire rating | 600 W | |
| Nominal LED strip rating | 2000 W | |
| Nominal low-voltage halogen or LED load with electronic drivers | 1000 W | |
| Minimum switching load | 500 mW | |
| Contact construction | Electromechanical | |
| Contact material | Cadmium-free silver alloy | |
| Coil and contact circuits | Electrically separate | |
| Ambient operating temperature | −40 to +40 °C | |
| Protection rating | IP20 | |
| Terminal type | Box-clamp screw terminals | |
| Mounting arrangement | Suitable for installation in appropriate electrical mounting boxes and behind blanking plates | |
| Relevant standard | EN 60669 | |
| Approvals | CE, UKCA and EAC, according to product variant |
Frequently Asked Questions
What is the Finder 26.02.8.012.4000 used for?
The Finder 26.02.8.012.4000 is an electromechanical impulse relay used to control lighting and compatible electrical circuits from momentary push buttons. It is particularly useful where a lighting circuit needs to be switched from multiple locations.
What is the current rating of the Finder 26.02.8.012.4000?
The relay has a 10 A rated contact current and a 250 V AC rated contact voltage. Its rated AC-1 switching capacity is 2500 VA, although permissible loads depend on the connected equipment and switching characteristics.
What coil voltage does the Finder 26.02.8.012.4000 require?
The relay requires a 12 V AC nominal coil supply at 50/60 Hz. It is designed for AC impulse operation and should not be connected directly to a DC supply without a suitable manufacturer-approved interface.
What contact configuration does the Finder 26.02.8.012.4000 have?
The relay has two normally open contacts (2 NO), also described as a double-pole single-throw normally open configuration. Both contacts change state together when the stepping mechanism receives a suitable control impulse.
Is the Finder 26.02.8.012.4000 a latching relay?
Yes. The Finder 26.02.8.012.4000 is a bistable electromechanical impulse relay. It maintains its selected contact state after the control impulse ends, unlike a conventional monostable relay that requires continuous coil energisation.
Can the Finder 26.02.8.012.4000 control lighting from multiple push buttons?
Yes. The relay is suitable for appropriately wired multi-point momentary push-button control systems. Each valid impulse changes the relay's switching state, allowing lighting to be controlled from several locations.
Can the Finder 26.02.8.012.4000 switch LED lighting?
Yes. The Series 26 has a nominal 300 W LED lamp rating, with separate manufacturer ratings for other LED lighting arrangements. Actual suitability must be checked against the number of lamps, LED driver inrush current and applicable switching limits.
Does the Finder 26.02.8.012.4000 need continuous coil power?
No. The relay uses an impulse-operated stepping mechanism. Once the contacts have changed state, they remain in that position without continuous coil energisation until the next valid control impulse.
Is the Finder 26.02.8.012.4000 designed for DIN rail mounting?
The Finder Series 26 is designed primarily for installation in suitable mounting boxes and behind blanking plates rather than as a conventional DIN rail modular relay. For DIN rail impulse switching, the Finder Series 20 may be more appropriate.
What is the difference between the Finder 26.01 and 26.02 impulse relays?
The Finder 26.01 has one normally open contact, while the Finder 26.02 has two normally open contacts. The 26.02 therefore allows two compatible circuits to be switched together using the same impulse control signal.
What is the protection rating of the Finder 26.02.8.012.4000?
The relay has an IP20 protection rating and a specified ambient operating temperature range of −40 to +40 °C. It should be installed inside a suitable enclosure that provides the required protection for the environment.
Trusted by Electrical Installers and Lighting Control Professionals
Finder Series 26 impulse relays provide practical, dependable switching for residential and commercial lighting installations. The Finder 26.02.8.012.4000 combines a 10 A contact rating, 12 V AC impulse coil, two normally open contacts and a compact electromechanical stepping mechanism to deliver convenient multi-point lighting control without continuous coil energisation.
