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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
4.7 ★★★★★
Based on 2175 reviews
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Product Reviews
★★★★★ 5
My dogs love their "keys".
Size: X-Small
My dog loves this. The only negative is that he does chew through it and I have to pick up the pieces or hope that he's not eating it.
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Reviewed in the United States on January 29, 2026
★★★★★ 3
Not long lasting for a chewer!
Size: Medium
These are massive! I have a golden retriever puppy and she chewed through the yellow ring very quickly. They keys are much more durable.
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Reviewed in the United States on March 25, 2026
★★★★★ 5
Size small. Perfect for little guys
Size: X-Small
These are my pups favorite chewy. He’s 4 months 5lbs. I was having issues with chew toys being too big. I got the small. They are perfect!
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Reviewed in the United States on April 7, 2026
★★★★★ 5
Great for puppies- have purchased several times
Size: X-Small
I have purchased this toy for a couple of the puppies in my life and they always love it. It’s not noisy, it’s made for puppies to chew (so it’s not too hard), and it’s fun for them to carry around with the different keys and key ring. A little pricey, but it always lasts a very long time- longer than they are a puppy!
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Reviewed in the United States on June 15, 2025
★★★★★ 5
Safe and Entertaining Chew Toy
Size: Medium
My dog absolutely loves this toy! She gets hours of chewing time out of it, and I feel so much better knowing the keys are made of a material that’s gentle on her teeth. Unlike harder toys that can chip teeth, this one is durable yet safe, and it keeps her happily entertained. Definitely a great choice for any dog that loves to chew.
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Reviewed in the United States on August 20, 2025