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Description
LT3SM00MMain Range of product LT3 Device short name LT3SM Product or component type Thermistor protection units [Uc] control circuit voltage 115 230 V AC 50 60 Hz Reset Manual Complementary Control circuit voltage limits 0. 85 1. 1 Uc Contacts type and composition 1 NC + 1 NO dual voltage [Ith] conventional free air thermal current 5 A for output control relay [Ui] rated insulation voltage Output control relay: 500 V AC [Ue] rated operational voltage 250 V AC
Main
| Range of product | LT3 |
| Device short name | LT3SM |
| Product or component type | Thermistor protection units |
| [Uc] control circuit voltage | 115...230 V AC 50/60 Hz |
| Reset | Manual |
Complementary
| Control circuit voltage limits | 0.85...1.1 Uc |
| Contacts type and composition | 1 NC + 1 NO dual voltage |
| [Ith] conventional free air thermal current | 5 A for output control relay |
| [Ui] rated insulation voltage | Output control relay: 500 V AC |
| [Ue] rated operational voltage | 250 V AC 50/60 Hz for output control relay |
| Signalling function | Fault indication Voltage indication |
| Control type | Manual test Manual reset |
| Probe interchangeability | Label mark A conforming to IEC 60034-11 |
| Hold-in power consumption in W | 1 W |
| Hold-in power consumption in VA | 2.5 VA |
| Resistance | 1500…1650 Ohm reset 2700…3100 Ohm tripping |
| Number of probes | 0…6 |
| Input voltage | < 2.5 V (1500 Ohm) for probe < 7.5 V (4000 Ohm) for probe conforming to IEC 60034-11 |
| Maximum short circuit detection resistance | 20 Ohm |
| Condition of use | Connection of probes 1000 m >2.5 mm² Connection of probes 500 m >1.5 mm² |
| [Uimp] rated impulse withstand voltage | 2.5 kV |
| Rated power in VA | 100 VA at 220 V - electrical durability: 500000 cycles |
| Breaking capacity | 2 A at 24 V DC DC-13 3 A at 250 V AC AC-16 6 A at 120 V AC AC-16 |
| Connections - terminals | Power circuit: cage type connector 1 cable(s) 0.75…2.5 mm²flexible with cable end Power circuit: cage type connector 1 cable(s) 0.75…2.5 mm²solid with cable end Power circuit: cage type connector 1 cable(s) 1…2.5 mm²flexible without cable end Power circuit: cage type connector 1 cable(s) 1…2.5 mm²solid without cable end Power circuit: cage type connector 2 cable(s) 0.75…2.5 mm²flexible with cable end Power circuit: cage type connector 2 cable(s) 0.75…2.5 mm²solid with cable end Power circuit: cage type connector 2 cable(s) 1…2.5 mm²flexible without cable end Power circuit: cage type connector 2 cable(s) 1…2.5 mm²solid without cable end |
| Tightening torque | 0.8 N.m |
| Height | 100 mm |
| Width | 22.5 mm |
| Depth | 100 mm |
| Net weight | 0.22 kg |
Environment
| Standards | IEC 60034-11 VDE 0660 |
| Product certifications | LROS (Lloyds register of shipping) |
| IP degree of protection | IP20 conforming to IEC 60529 IP20 conforming to VDE 0106 |
| Ambient air temperature for operation | -25…60 °C |
| Ambient air temperature for storage | -40…85 °C conforming to IEC 60068-2-2 -40…85 °C conforming to IEC 60068-2-2 |
| Operating altitude | <= 1500 m without derating in temperature > 1500...3000 m with derating in temperature |
| Vibration resistance | 1 gn 25...150 Hz conforming to IEC 60068-2-6 2.5 gn 2...25 Hz conforming to IEC 60068-2-6 |
| Shock resistance | 5 gn 11 ms conforming to IEC 60068-2-27 |
| Electromagnetic compatibility | Resistance to electrostatic discharge level 3 conforming to IEC 61000-4-2 Resistance to fast transient level 3 conforming to IEC 61000-4-4 Surge resistance 1.2/50-8/20 level 4 conforming to IEC 61000-4-5 Susceptibility to electromagnetic fields level 3 conforming to IEC 61000-4-3 Immunity to microbreaks and voltage drops conforming to IEC 61000-4-11 |
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
4.2 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 5
Comfortable Ergonomic Chair for Long Workdays
Color: Black, Color: Black
I’ve been using this chair for my home office, and it’s been a great addition to my workspace. The seat cushion is thick and comfortable, even after several hours of sitting, and the mesh back keeps good airflow throughout the day. I especially like the adjustable headrest, which provides extra neck support when leaning back during breaks. Assembly was straightforward, the chair feels sturdy, and the wheels roll smoothly on my floor. The all-black design also gives it a professional look that fits well in any office setup. Overall, it’s a comfortable and affordable ergonomic chair that offers excellent value for the price.
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Reviewed in the United States on May 28, 2026
★★★★★ 3
Sturdy but uncomfortable
Color: Black
The seat itself is sturdy and easy to put together, I’ve now had the product for 8 months and had no issues wear/tear despite nearly daily use, but… it’s not comfy, at all. The seat cushion has a texture to it that scrapes at my legs if I don’t have an extra pillow on it or am wearing shorts. Additionally, the seat pillow is just kind of hard. It doesn’t give very much at all, so if I sit on it for more than an hour or two at a time my butt starts to get really sore. It works as a budget option, but invest in a good seat pillow if you plan to sit in it for any length of time.
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Reviewed in the United States on April 29, 2026
★★★★★ 5
A chair that does the job
Color: Black, Color: Black
I’m really happy with this chair overall. I wanted something comfortable, sturdy, breathable, and spacious enough for long hours at my desk when I work from home, and this chair delivered. I’d easily give this chair five stars because it exceeded my expectations in comfort, quality, and overall value.
Comfort and Support
The mesh back keeps it cool and comfortable during extended use. One of my favorite features is the adjustable lumbar support. You can manually position it exactly where your lower back needs support, and it fits the curve of my back perfectly. It provides great support without feeling too firm or uncomfortable.
Build Quality and Design
The chair itself feels solid and well-built. It doesn’t creak or make noise when shifting around, which makes it feel stable and high-quality. The seat is roomy and comfortable, and the overall design looks clean and modern.
Easy Assembly
It also came with an instruction manual that was extremely simple to follow, and assembly was very easy. I was able to put the chair together by myself in about 20 minutes without any help.
Armrest Functionality
I also like the armrests. They aren’t adjustable by height, but they do flip all the way up, which is surprisingly convenient. You can easily slide the chair under a desk or use it as an armless chair when needed.
Packaging and Presentation
Another thing worth mentioning is the packaging. Everything arrived extremely well-packed. Every individual part of the chair was wrapped securely, including bubble wrap protection for the components. The hardware and accessories were neatly organized, and the chair even came with the necessary tools for assembly in case you don’t own a drill or tool set. The presentation and packaging were excellent and showed real attention to detail.
Overall Impression
Overall, this is a fantastic office chair for the price: comfortable, supportive, sturdy, easy to assemble, and packaged exceptionally well. I’d absolutely recommend it and would confidently give it a five-star rating.
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Nice chair
Easy to assemble and looks clean in my home office. The lumbar support is actually helpful, and I like that the arms flip up so I can tuck it under my desk. It’s comfortable for a full workday, though the seat could be a bit softer. Overall, solid value for the price.
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Reviewed in the United States on May 2, 2026
★★★★★ 5
Comfortable and Good Quality
I'm happy with the chair and feels durable. It's supportive for my back and has good lumbar support. It was also easy to put together. Good value for the money.
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Reviewed in the United States on May 27, 2026