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Description
LUCA18FUMain Range TeSys Product name TeSys U Device short name LUCA Product or component type Standard control unit Product specific application Basic protection requirements for motor starters: overload and short circuit Product compatibility LUFN.. LUFC00 Utilisation category AC 41 AC 44 AC 43 Motor power kW 15 kW at 690 V AC 50 60 Hz 9 kW at 500 V AC 50 60 Hz 7. 5 kW at 400 440 V AC 50 60 Hz Thermal protection adjustment range 4. 518 A [Uc] control
Main
| Range | TeSys |
| Product name | TeSys U |
| Device short name | LUCA |
| Product or component type | Standard control unit |
| Product specific application | Basic protection requirements for motor starters: overload and short-circuit |
| Product compatibility | LUFN.. LUFC00 |
| Utilisation category | AC-41 AC-44 AC-43 |
| Motor power kW | 15 kW at 690 V AC 50/60 Hz 9 kW at 500 V AC 50/60 Hz 7.5 kW at 400...440 V AC 50/60 Hz |
| Thermal protection adjustment range | 4.5…18 A |
| [Uc] control circuit voltage | 110...220 V DC 110...240 V AC |
| Thermal overload class | Class 10 - frequency limit: 40…60 Hz - temperature compensation: -25…70 °C conforming to IEC 60947-6-2 Class 10 - frequency limit: 40…60 Hz - temperature compensation: -25…70 °C conforming to UL 508 Class 20 - frequency limit: 40…60 Hz - temperature compensation: -25…70 °C conforming to IEC 60947-6-2 Class 20 - frequency limit: 40…60 Hz - temperature compensation: -25…70 °C conforming to UL 508 |
Complementary
| Main function available | Earth fault protection Manual reset Protection against phase failure and phase imbalance Protection against overload and short-circuit |
| Mounting mode | Plug-in |
| Mounting location | Front side |
| Control circuit voltage limits | 88...242 V for DC circuit 110...220 V in operation 88...264 V for AC circuit 110...240 V in operation |
| Typical current consumption | 25 mA at 110...240 V AC I rms sealed with LUB12 25 mA at 110...240 V AC I rms sealed with LUB32 280 mA at 110...220 V DC I maximum while closing with LUB12 280 mA at 110...220 V DC I maximum while closing with LUB32 280 mA at 110...240 V AC I maximum while closing with LUB12 280 mA at 110...240 V AC I maximum while closing with LUB32 35 mA at 110...220 V DC I rms sealed with LUB12 35 mA at 110...220 V DC I rms sealed with LUB32 |
| Operating time | 35 ms opening with LUB12 for control circuit 35 ms opening with LUB32 for control circuit 50 ms closing with LUB12 for control circuit 50 ms closing with LUB32 for control circuit |
| Load type | 3-phase motor - cooling: self-cooled |
| Tripping threshold | 14.2 x Ir +/- 20 % |
| [Ui] rated insulation voltage | 600 V conforming to UL 508 690 V conforming to IEC 60947-1 600 V conforming to CSA C22.2 No 14 |
| [Uimp] rated impulse withstand voltage | 6 kV IEC 60947-6-2 |
| Safe separation of circuit | 400 V SELV between the control and auxiliary circuits conforming to IEC 60947-1 400 V SELV between the control or auxiliary circuit and the main circuit conforming to IEC 60947-1 |
| Net weight | 0.135 kg |
Environment
| Heat dissipation | 3 W for control circuit with LUB32 |
| Immunity to microbreaks | 3 ms |
| Immunity to voltage dips | 70 % / 500 ms conforming to IEC 61000-4-11 |
| Standards | UL 508 type E, with phase barrier EN 60947-6-2 IEC 60947-6-2 CSA C22.2 No 14 type E |
| Product certifications | ABS BV CSA LROS (Lloyds register of shipping) ASEFA ATEX GOST GL DNV UL CCC |
| IP degree of protection | IP20 front panel and wired terminals conforming to IEC 60947-1 IP20 other faces conforming to IEC 60947-1 IP40 front panel outside connection zone conforming to IEC 60947-1 |
| Protective treatment | TH conforming to IEC 60068 |
| Ambient air temperature for operation | -25…70 °C |
| Ambient air temperature for storage | -40…85 °C |
| Operating altitude | 2000 m |
| Fire resistance | 960 °C parts supporting live components conforming to IEC 60695-2-12 650 °C conforming to IEC 60695-2-12 |
| Shock resistance | 10 gn power poles open conforming to IEC 60068-2-27 15 gn power poles closed conforming to IEC 60068-2-27 |
| Vibration resistance | 2 gn, 5…300 Hz, power poles open conforming to IEC 60068-2-6 4 gn, 5…300 Hz, power poles closed conforming to IEC 60068-2-6 |
| Resistance to electrostatic discharge | 8 kV level 3 in open air conforming to IEC 61000-4-2 8 kV level 4 on contact conforming to IEC 61000-4-2 |
| Non-dissipating shock wave | 1 kV serial mode conforming to IEC 60947-6-2 2 kV common mode conforming to IEC 60947-6-2 |
| Resistance to radiated fields | 10 V/m 3 conforming to IEC 61000-4-3 |
| Resistance to fast transients | 2 kV class 3 serial link conforming to IEC 61000-4-4 4 kV class 4 all circuits except for serial link conforming to IEC 61000-4-4 |
| Immunity to radioelectric fields | 10 V conforming to IEC 61000-4-6 |
Offer Sustainability
| Sustainable offer status | Green Premium product |
| REACh Regulation | REACh Declaration |
| EU RoHS Directive | Compliant EU RoHS Declaration |
| Mercury free | Yes |
| RoHS exemption information | Yes |
| China RoHS Regulation | China RoHS declaration |
| Environmental Disclosure | Product Environmental Profile |
| Circularity Profile | End of Life Information |
| WEEE | The product must be disposed on European Union markets following specific waste collection and never end up in rubbish bins |
Contractual warranty
| Warranty | 18 months |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 704 reviews
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Product Reviews
★★★★★ 4
Great no-frills Bluetooth wireless headphones
Color: Blue
I did not read the description carefully. It states what devices these headphones are compatible with and "desktop computer" is not one of them. I called Sony and they told me they will work with almost any modern device that has Bluetooth connectivity. I easily wirelessly connected them to my desktop computer and they work great. Strangely the user guide gives instructions on how to use them with Mac and Windows computers, so read the user guide/manual that is linked in the description. If you want to use any of the functions of the Sony Headphones Connect app you will need a compatible phone. If you do not use the app (not compatible with computers) they function as a basic pair of wireless headphones. All rather confusing and the Amazon description does nothing to clear it up.
With that being said I connected it easily to my desktop computer. I am no audiophile and do not need a $400 pair of headphones. To me they sound great especially for the inexpensive price. They are NOT noise cancelling headphones and I did not want noise cancelling. They are "on the ear" headphones meaning they are about the size of your ear and press your ears against your head creating a bit of a seal keeping some exterior noise out. Works fine, but if you wear eyeglasses and wear the glasses and the headphones at the same time after a few hours it can become uncomfortable as the headphones press your ear against the arm of the glasses and the arm of the glasses into the side of your head.
The charging port on the headphones is USB C and they come with a USB A to USB C cable but no charging brick. I connected mine to my computer with a USB C to USB C cable and it charged fine. 50 hours of playtime on one charge is great.
One star for a confusing and unclear Amazon description. 4 stars for a good basic pair of headphones that works with almost any modern Bluetooth device, albeit without the functions of the Sony app (unless you are using it with a compatible phone).
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Reviewed in the United States on December 12, 2025
★★★★★ 5
Lightweight, great sound and beautiful color.
Color: Cappuccino
I absolutely love these headphones. The color is great, they're lightweight, feel great on my ears and head. They're great quality and love that they twist down when testing then on my neck so they're not hitting my face. I would recommend this product!
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Reviewed in the United States on May 16, 2026
★★★★★ 5
Good sound
Color: Cappuccino
Not super noise canceling but good quality charge last a very long time. Controls on the ear piece are a bit awkward to use.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Perfect for me!
Color: Black
Slim/lightweight. Comfortable fit. Good charge. Though my volume was on a 4 or 5 and when I took the headphones off I could hear my music a little. You can’t fold to close them like other styles but I can rotate the earmuffs to make them fit in my bag. Definitely a solid pair of wireless headphones for a good price!
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Reviewed in the United States on May 31, 2026
★★★★★ 3
Good for quick music sessions, but disappointing for calls and comfort
Color: Black
Here are two updated versions of your review that incorporate the new details about quality, value, controls, and noise cancellation.
Option 1: The "Pros & Cons" Breakdown (Highly Scannable)
Headline: Great Battery and Sound, but Lacks Comfort and Effective Noise Isolation
I’ve had a chance to test these thoroughly, and here is how they break down based on the key features:
Quality & Controls: The build quality is good, and the controls are intuitive and easy to use.
Battery: Excellent. It lasts a very long time on a single charge.
Sound & Music: Very good for music listening, though the noise canceling is very bad. You will hear most of what is going on around you.
Comfort: Not for long-term use. After a while, they cause noticeable pain on the ears.
Call Quality: Quite bad. If you are doing any work or moving around, the person on the other end will be bothered by the background noise.
Value for Money: Average. While the battery and music are highlights, the lack of comfort and poor mic quality make the price feel only "okay."
Option 2: The Narrative Review (Best for Amazon's Algorithm)
Headline: Good for quick music sessions, but disappointing for calls and comfort
The Sony WH-CH520 is a solid device in terms of build quality and controls, and the battery life is truly impressive. If you just need a pair of headphones for short music sessions, these sound great.
However, I found the value for money to be average due to a few major flaws. First, the comfort is lacking; they start to hurt my ears after wearing them for a short while. Second, the noise canceling is very poor—don't expect these to block out your environment. Finally, I do not recommend these for phone calls. The mic picks up way too much ambient noise, which makes it frustrating for the person you are talking to.
Great for the battery and buttons, but not ideal for an all-day office or travel headset
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Reviewed in the United States on April 19, 2026