With more than 30.000 high-quality spare parts, they can be sold immediately. Our large inventory allows us to quickly meet customer needs, thereby reducing downtime and protecting production schedules. Our timely delivery time provides you with security and save money.
We provide 1 year warranty on every product we sell.
Service means taking a customer problem and making it your own challenge. Years of experience and listening skills enable us to think and act quickly and accordingly. You have a problem? – We have the solution!
Apter Power is not an authorized distributor, reseller or representative of the products featured on this website. All product names, trademarks, brands and logos used on this site are the property of their respective owners. The depiction, description or sale of products featuring these names, trademarks, brands and logos is for identification purposes only and is not intended to indicate any affiliation with or authorization by any rights holder.
The Sales Team at Apter Power is constantly scanning the web to ensure we are offering the lowest prices possible.
However, if you think we can do better, feel free to make an offer on any of our products.
We pride ourselves on saving you money! Here is how to make an offer.
Only spare parts that you are seriously considering purchasing. Once your bid is accepted, a sales order will be generated and an invoice will be created.
If you have any questions about our quotes, please feel free to contact us. We will be happy to help you further.
If you receive a lower price than us, please do not hesitate to contact us. We allow you to quickly obtain the same part at a very low cost. Our extensive knowledge of industrial automation parts means that we can provide you with the best value and innovation. We ensure your satisfaction at all times.
The 1SDA073700R1 is an undervoltage release (YU) for low-voltage frame circuit breakers and molded case circuit breakers. It operates at 220V-240V AC/DC and automatically trips the circuit breaker when the supply voltage drops to between 35% and 70% of its rated value, providing reliable safety protection for industrial and commercial power systems.
Universal AC/DC Interoperability
Continuous Fail-Safe Voltage Monitoring
Equipment Protection & Anti-Restart Security
This original plug-and-play safety component delivers perfect mechanical and electrical integration within ABB SACE Emax 2 (E1.2 to E6.2) air circuit breakers and SACE Tmax XT7/XT7M molded case circuit breakers. Manufactured in Italy to comply with stringent IEC global electrical standards, its wide-voltage architecture seamlessly accommodates both alternating and direct current networks, allowing global distributors and panel builders to minimize stock variants. Beyond emergency tripping during brownouts, it acts as a critical electrical interlock by keeping the breaker locked open during extended blackouts, eliminating the risk of hazardous, uncontrolled machinery self-restarting when grid power returns.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
ABB 1SDA073700R1 Undervoltage Release (YU) Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Oil & Gas
Integrated into Emergency Shutdown (ESD) security systems, this module operates as a fail-safe device: if the control cable cuts or power fails completely, the coil immediately releases to trip the breaker, isolating the zone from spark risks.
Automotive Manufacturing
Protects technicians by ensuring that heavy robotic equipment or high-pressure press machines remain electrically locked out during a blackout, eliminating dangerous automatic restarts when utility power is restored.
Semiconductor
Wafers are highly sensitive to voltage sags (brownouts); the 1SDA073700R1 instantly trips the main power breaker if grid voltage drops below 70%, preventing corrupted production runs and damage to multimillion-dollar tooling equipment.
Chemical Processing Plants
Prevents hazardous situations by locking out chemical feed pump motors during a power outage. It ensures that when power returns, the motors cannot self-restart without operator re-authorization, avoiding explosive chemical imbalances.
Steel Mills & Metallurgy
High-power induction loads cause severe localized voltage dips, the 1SDA073700R1 acts as an infrastructure safeguard, tripping the main air circuit breaker to protect massive heavy-duty equipment if the grid voltage degrades to critical degradation levels.
Before installing or maintaining the 1SDA073700R1 undervoltage release, always ensure that the circuit breaker is completely de-energized and the charging springs are fully discharged. The input control voltage must be strictly maintained within the 220–240V AC/DC range. Because this module operates under a continuous-duty cycle, the circuit breaker cannot be closed if the coil is not energized or if the control voltage drops below the safety threshold. During operation, ensure proper switchboard ventilation to maintain an ambient enclosure temperature between -25°C and +70°C, preventing premature thermal aging. Additionally, if the local grid experiences frequent voltage sags, pairing it with an external time-delay device is highly recommended to avoid nuisance tripping.
1SDA073700R1 is an internal electrical accessory for smart low-voltage circuit breakers manufactured by ABB Electrification, officially defined as an Undervoltage Release (Undervoltage Coil, YU).
How should 1SDA073700R1 be used?
It must be inserted and secured into a designated internal slot within a compatible circuit breaker. It requires a continuous control power supply; the circuit breaker can only be closed when this coil is energized.
What is the core operating principle of 1SDA073700R1?
It is used to monitor control loop voltage. When the grid voltage is lost or drops between 35% and 70% of the rated voltage, the coil automatically releases, forcing the circuit breaker to trip open instantly.
What is the rated operating voltage of 1SDA073700R1?
Its rated control voltage is 220V–240V AC/DC, making it interoperable with both alternative and direct current standard industrial secondary control loops.
Is 1SDA073700R1 continuously energized?
Yes. It operates under a Continuous Duty cycle. As long as the circuit breaker is in operation and delivering power, this coil must remain constantly energized.
We've Got You Covered
We give you access to a global supply of automation parts at your fingertips, ensuring that manufacturers around the world can avoid unnecessary downtime and continue to do what they do best – making our world possible.
Focus on supplying surplus and new automation spare parts With abundant inventory and partnerships with top manufacturers, Apter Power ensure high-quality solutions for your industrial requirements
Key control components
As a trustworthy supplier of surplus components, we procure parts from projects with excess inventory, system upgrades, factory shutdowns, and surplus suppliers. Our strict quality control ensure that our products achieve optimal performance
Warehouse Reserve
Many difficult to find parts, including PLC, HMI, DCS, panel controllers, industrial PCs, and VFDs. These parts help extend the lifespan of your existing system, reduce expensive replacement costs, and minimize downtime, thereby keeping your operations running smoothly
20 years of outstanding experience in industrial automation supply
For over 20 years, Apter Power always been a trustworthy leader in the industrial automation supply industry. As a trustworthy supplier of automation parts, we continuously expand our product line, expand our global customer base, and have won numerous awards
How do we deliver
How do we deliver
If you need complete documents to handle special situations such as letters of credit, we can ship small packages in 'cargo mode'. We can arrange freight or air freight for you, or cooperate with your freight agent
Urgency
If you require any other type of emergency or carrier, we need you to clearly specify this information on the order. We can usually ship on the same day. We do not charge additional fee, but it will depend on the expedited shipping option you use. Please let us know your level of urgency, and we will try our best to ship in the same day once you place order to us.
Freight Charge
If you contact us by phone, fax, or email, we can also provide you with this information. The product price does not include shipping or insurance fee. If you need, we are happy to provide a shipping quote and also can provide weight and size information. If you require proforma invoice, please let us know if you would like us to quote the shipping cost or if you would like us to use your shipping account.
Tracking
After the product have been shipped, we usually send your tracking number via email. Therefore, please be sure to provide your email address when registering or quoting.
Urgent requirements for automation or control components?
Urgent shipment of industrial automation parts
Shutdown will waste your time and money - always ready to assist you. As a reliable supplier of automation parts, we provide fast shipping services to quickly deliver critical components to your hands, minimizing downtime to the greatest extent possible.
Obsolute or hard to find parts
We focus on purchasing necessary and rare automation parts to maintain the operation of the manufacturing industry. No matter the year, scarcity, or location of the parts, we will find and deliver the parts you need
Our strongest business
Global supply of automation parts. Automation spare parts procurement and global suppliers can reduce cost, save time, and decrease MRO fee.
Extend equipment lifespan
As one of the most trusted suppliers of industrial automation parts, we deeply understand the importance of reliable performance. That's why we exceed industry standards, whether you're replacing old components or maintaining critical systems
Sustainable supply chain solutions
Our long-term success stems from our commitment to quality, reliability, and customer satisfaction. Whether you are purchasing rare spare parts. Apter Power stands out among industrial automation parts suppliers with its rich experience, high-quality service, and unparalleled quality assurance.
Why choose Apter Power?
Spare parts warehouse
We have a warehouse of 50000 square meters, providing tens of thousands of different spare parts, and 24/7 online sales personnel to provide support for you. Always available, crucial for both you and us.
Fast delivery
Experienced team members assist in providing our customers with fast delivery of automation and control components, delivering to over 60000 users worldwide.
High quality new spare parts service
Our extensive inventory of control systems (DCS, PLC, CNC), panel controllers, human-machine interfaces (HMI), industrial PCs, drivers, and power spare parts helps you reduce maintenance costs. Provide industrial automation spare parts that manufacturers no longer provide. We are a leading supplier that provides rare industrial automation parts to businesses of all sizes, with a strong track record of delivering the highest quality parts and services to customers at highly competitive price.
Videos
News
Applications
