The Zooz XS Relay ZEN57 800 EU is the smallest professional Z-Wave switching relay for European installations and provides full on/off control for lighting and low-power appliances up to 5 Amps. This ultra-compact relay with the Z-Wave 800 series chip supports Z-Wave Long Range technology for wireless range up to 400 meters (1300 feet) when your hub supports this feature. With support for both 120V and 240V (100-240V AC, 50/60Hz), the ZEN57 is ideal for European homes and fits into even the smallest and most crowded back boxes where standard relays simply won't fit. Unique compact form factor Significantly smaller than the popular ZEN51 , the ZEN57 is specifically designed for tight switch cabinets, shallow backboxes, or direct mounting on light fixtures. Measuring just 30 x 25 x 15 mm (1.2" x 1" x 0.6"), this relay fits where other smart relays fail. It features screw terminals for easy LINE, LOAD, and NEUTRAL connections, plus two pigtail wires for dry contact switch input. Wet contact relay with dry contact switch The ZEN57 uses a wet contact relay , meaning the output relay carries the mains voltage (LINE). This distinguishes it from the ZEN51, which has a dry contact relay. However, the switch input operates as a dry contact via pigtail wires , allowing you to use both regular toggle switches and momentary switches. This configuration is perfect for single-pole installations when the line and load are in the same box . Load capacity and applications At 120V: 5A resistive 500W incandescent bulbs 150W LED lighting At 240V (Europe): 5A resistive 1000W incandescent bulbs 300W LED lighting Note: Due to the 5A resistive relay, the ZEN57 cannot be used with inductive loads such as motors, fans, or pumps. For these applications, we recommend: Zooz ZEN17 Universal Relay (2x NO/NC, more robust for inductive loads) Zooz ZEN51 Dry Contact Relay (10A, suitable for heavier loads) Recommended applications Ideal for: Tight Switch Boxes : Perfect for shallow or crowded wall boxes where the ZEN51 is too large Rear mechanical switch : Excellent for single-pole installations when load and power are in the same box At the fixture : Suitable for direct installation in the junction box of the lamp Multi-switch configurations : Can be used with regular or momentary switches in series, but only if line and load are in the same box Not recommended for: Multi-way installations with load and line in separate boxes Applications that exceed the stated load capacity Inductive loads such as motors, fans or pumps Technical specifications Model : ZEN57 800LR (EU version) Z-Wave chip : 800 series with Z-Wave Long Range Frequency : 868.42 MHz (EU) Power supply : 100-240V AC, 50/60Hz Maximum load : 5A resistive (240V: 1000W incandescent, 300W LED) Relay type : Wet contact (output carries mains voltage) Switch input : Dry contact via pigtail wires Terminals : Screw terminals for LINE, LOAD, NEUTRAL Z-Wave Range : Up to 100 meters (300 feet) normal, up to 400 meters (1300 feet) with Z-Wave Long Range Dimensions : 30 x 25 x 15 mm (1.2" x 1" x 0.6") Operating Temperature : 0-40°C (32-104°F) Installation : Indoor, dry locations only Certification : Z-Wave Plus V2, S2 Security Compatibility with Home Assistant, Homey and Fibaro Home Assistant : The ZEN57 has excellent Home Assistant support through official Z-Wave JS integration. The device appears as an on/off switch (switch entity). Using advanced parameters, you can separate the switch input from the relay output, allowing them to operate independently. You can even create a child device with a Notification Command Class, similar to the ZEN16/17, for even more automation possibilities. Over-the-air firmware updates are fully supported via Z-Wave JS. Homey : The ZEN57 works with Homey Pro (2023) via native Z-Wave support. The device connects as a standard on/off switch. Make sure your Homey firmware is up to date for optimal Z-Wave 800 series support. Z-Wave Long Range functionality relies on Homey Pro support for LR. Fibaro : The ZEN57 is compatible with Fibaro Home Center 3 or later via Z-Wave. The device appears as a binary switch. Advanced parameters for separating input and output may be available through the Fibaro interface, depending on the implementation. Advanced features via Z-Wave parameters Input/Output Separation : Use parameters to separate the switch input from the relay output Child device : Create a second device entity via Notification Command Class for advanced scenes Auto turn-off timer : Set the relay to automatically turn off after X seconds/minutes LED indicator : Configure status LED behavior Power-on state : Determine relay status after power failure (last state, always on, always off) Installation instructions Safety first: Always turn off the power at the fuse box before starting. Follow all local electrical codes. Basic wiring: LINE (L) → Connect to the phase wire (black/brown) NEUTRAL (N) → Connect to the neutral wire (white/blue) LOAD → Connect to the load (lamp
