MAGNETEK SR – 37 | Power Controller
MAGNETEK SR – 37 Product Description
Product Overview
The MAGNETEK SR – 37 is a highly reliable and versatile component designed to meet specific electrical protection and control needs within industrial and commercial setups. Magnetek, a well – respected name in the electrical and automation industry, has engineered the SR – 37 with precision and durability in mind. This product is not a one – size – fits – all solution but rather a specialized device that can be integrated into various systems to enhance their performance and safety.
Hainan Jinlin Mechanical & Electrical, with its wealth of industry knowledge, is committed to providing top – notch service for the MAGNETEK SR – 37 and other industrial control products. We follow the “Customer First, Forge Ahead” business philosophy, ensuring our customers receive the best support.
Technical Specifications
As a Voltage Monitoring Relay (if applicable)
- Supply Voltage: It can operate with different supply voltage ranges depending on the model variant. For three – phase applications, in a 3 – phase 3 – wire configuration, it can handle voltages such as 380V, 400V, or 415V. In a 3 – phase 4 – wire setup, supply voltages like 220V, 230V, or 240V are suitable.
- Operating Voltage Range: For the 3 – phase 3 – wire version, the operating voltage range typically spans from 266V to 540V, while for the 3 – phase 4 – wire, it ranges from 154V to 312V.
- Over – Voltage (U>) Setting Value: Usually adjustable within a range like (105% – 125%)×Un (where Un is the nominal voltage).
- Under – Voltage (U<) Setting Value: Adjustable in the range of (75% – 95%)×Un.
- Asymmetry Setting: This can be adjustable from 5% to 20% or fixed at 8% in some models.
- Trip Delays:
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- U> trip delay is often adjustable from 0.1 to 10s, with a common fixed value of 2s.
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- U< trip delay also has an adjustable range of 0.1 to 10s, with a possible fixed value of 2s.
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- Asymmetry trip delay can be adjusted from 0.1 to 10s, and may have a fixed setting of 2s.
- Hysteresis: A fixed 2% hysteresis is maintained in the voltage monitoring operation to prevent rapid switching.
- Trip Time for Incorrect Phase Sequence and Phase Failure: The SR – 37 is designed to detect and respond quickly, with a trip time of less than 0.5s in case of incorrect phase sequence or phase failure.
- Delay Error: The delay settings have an error tolerance of ±10% + 0.1s.
- Knob Setting Error: If the device has knob – based settings, the error is typically 1% of the scale value.
- Rated Insulation Voltage: It has a rated insulation voltage of 415V to ensure safe operation and electrical isolation.
- Output Contacts: Equipped with 1C/0 output contacts, which can handle a current rating of 8A/250V AC1.
- Mechanical and Electrical Life: The mechanical life of the contacts is rated at 106 operations, and the electrical life is 105 operations, indicating its long – term reliability.
- Protection Degree: With an IP20 protection degree, it is suitable for indoor use in relatively clean environments where it can be mounted in control panels.
- Pollution Degree: Rated for pollution degree 3, which means it can handle environments with moderate levels of conductive pollution.
- Altitude: Can operate effectively at altitudes up to 2000m.
- Operating Temperature: The operating temperature range is – 20℃ to + 55℃, allowing it to function in a wide variety of industrial environments.
- Permissible Relative Humidity: At 40℃, the permissible relative humidity is ≤50% without condensation.
- Storage Temperature: It can be stored in temperatures ranging from – 30℃ to 70℃.
- Wire Size/Torque: Accepts wire sizes from 0.5mm² to 2.5mm², with a recommended torque of 0.5Nm for proper connection.
As a Rectifier Diode (if applicable)
- Current and Voltage Ratings: The SR – 37 can be a 3A, 90V silicon rectifier diode. It is designed for surface – mounted applications. The reverse voltage can range from 100 to 800 volts depending on the specific requirements.
- Package and Mounting: It comes in a low – profile DO – 214AA package with built – in strain relief, which makes it easy for pick – and – place assembly in manufacturing processes. The package also has a flammability classification of 94V – 0.
- Electrical Characteristics:
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- For single – phase, half – wave, 60Hz, resistive or inductive loads, it performs optimally. When used with capacitive loads, the current should be derated by 20%.
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- It has a maximum repetitive peak reverse voltage, and can withstand 8.3mS single half – sine – wave superimposed on the rated load (as per MIL – STD – 750D 4066 method).
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- The maximum instantaneous forward voltage at 3.0A is well – defined. The maximum DC reverse current and maximum reverse recovery time are also specified.
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- The typical junction capacitance (measured at 1.0MHz and an applied reverse voltage of 4.0 volts) and maximum thermal resistance (with specific land area conditions) are provided for proper circuit design.
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- The operating and storage temperature range is – 50 to + 150℃, making it suitable for use in environments with extreme temperature variations.
As an Auto – Reset Circuit Breaker (if applicable)
- Voltage and Current Ratings: If functioning as an auto – reset circuit breaker, it can handle a voltage of 30Vdc. The current rating can vary, with options available in the range of 50 to 120 amps. It can interrupt high currents, for example, 2,100A @ 14Vdc and 1,400A @ 30Vdc.
- Protection and Certification: It offers Type I protection and is ignition – protected, making it suitable for applications where safety is a prime concern, such as in battery – powered systems or utility trucks. It meets standards like SAE J 553 and SAE J1625 for interrupt and endurance, and has a dielectric strength compliant with UL 1077.
Key Features and Benefits
Precise Electrical Monitoring and Protection
If the SR – 37 is a voltage monitoring relay, it provides comprehensive protection for three – phase electric motors. By constantly monitoring the voltage, it can detect phase failure, incorrect phase sequence, voltage asymmetry, over – voltage, and under – voltage. This protection is crucial as it can prevent motor damage due to electrical irregularities, thus reducing downtime and maintenance costs in industrial processes. For example, in a manufacturing plant where motors drive conveyor belts, pumps, or other machinery, the SR – 37 can ensure that the motors operate within safe voltage limits, preventing premature wear and tear or sudden breakdowns.
Reliable Rectification
In the case of being a rectifier diode, the SR – 37’s fast recovery times contribute to high – efficiency power conversion. It can effectively convert alternating current to direct current, which is essential in many electronic and electrical devices. The low – profile package and easy – to – assemble design make it suitable for modern, space – constrained circuit boards. Its ability to handle different voltage and current levels, along with a wide temperature range for operation and storage, make it a reliable choice for various applications, from power supplies in industrial equipment to consumer electronics.
Safety – Oriented Circuit Protection
When acting as an auto – reset circuit breaker, the SR – 37 offers an economical and compact solution for protecting electrical circuits. Its ignition – protected feature is a significant advantage in applications where there is a risk of sparks igniting flammable substances, such as in battery – charging stations or vehicles. The ability to automatically reset after a fault is cleared can reduce the need for manual intervention, improving the overall efficiency of the electrical system. It is an ideal alternative to traditional bolt – down type fuses, providing reliable protection for a wide range of applications, including those in utility trucks or battery – powered equipment.
Related Models
- MAGNETEK SR – 36: A related model that may have similar functionality but with slightly different voltage or current ratings. For example, it could be designed to handle lower currents or voltages, making it more suitable for smaller – scale applications or circuits with less demanding electrical requirements.
- MAGNETEK SR – 38: This model might offer enhanced features compared to the SR – 37. It could have a higher current – handling capacity, a wider operating temperature range, or more advanced protection mechanisms. It could be an upgrade option for applications where the SR – 37’s capabilities are stretched, such as in high – power industrial machinery or in environments with extreme conditions.
- Competitor Equivalent Models: There are likely to be equivalent products from other manufacturers in the market. For instance, some companies may offer voltage monitoring relays with similar protection features, rectifier diodes with comparable electrical characteristics, or auto – reset circuit breakers with similar safety certifications. However, the MAGNETEK SR – 37 may stand out due to Magnetek’s reputation for quality, reliability, and its specific combination of features that are optimized for certain industrial and commercial applications.
As a certified partner of leading industrial brands, we supply key components for diverse application areas. In manufacturing industries, the MAGNETEK SR – 37 can be used to protect motors in production lines, ensuring smooth operation and preventing costly breakdowns. In the automotive industry, it can be part of the electrical system in vehicles, either as a circuit breaker to protect the battery and electrical components or as a rectifier diode in power conversion units. In infrastructure projects, such as power distribution systems or water treatment plants, it can play a role in monitoring and protecting electrical equipment.
We offer a one – year warranty for the MAGNETEK SR – 37. Our professional pre – sales team provides technical consultation to ensure proper system integration, while our after – sales service includes troubleshooting, repair, and maintenance support. If you cannot find the model you need or have any questions regarding the MAGNETEK SR – 37, please contact us immediately. We are dedicated to meeting your industrial control requirements and providing you with the best solutions.
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