Product Application Label

Product Brand Tag

Description
Reviews

　　Note that all products on this website are special products, and market prices are constantly fluctuating.

　　Please refer to customer service for a quote, as the price may not be accurate as the product is new.

　　Please confirm the model, product, price, and other details with customer service before placing an order. This website is currently in use.

　　New products are available for sale; please contact customer service for further information.

　　5SGY3545L0017 Other Names:

　　IGCT Module 5SGY3545L0017

　　5SGY3545L0017 High Voltage Inverter Module

　　Semiconductor Thyristor 5SGY3545L0017

　　The 5SGY3545L0017 is an asymmetric gate turn-off thyristor (GTO) manufactured by ABB Switzerland Ltd. Semiconductors. It has a voltage rating of 4500V and a maximum interrupt current of approximately 4000A, making it a typical high-voltage, high-current power switching device. A low-power gate control signal is used to turn a high-power main circuit on and off, achieving high-power energy conversion between DC and AC. Its most fundamental difference from a conventional thyristor (SCR) is that a conventional thyristor can only be turned on by gate triggering; once turned on, the gate loses control and must wait for the main current to cross zero to turn off naturally. A GTO, however, can actively turn off by applying a negative current pulse to the gate while it is on. Therefore, in inverter circuits powered by the DC bus, there is no need for a large forced commutation circuit for turn-off, which is the core reason why it was widely used in locomotive traction and high-power frequency converters in the past.

　　II. Working Principle

　　1. Internal Structure

　　A GTO is a PNPN four-layer three-terminal semiconductor device:

　　The outermost layers are a P+ anode and an N+ cathode;

　　The middle layers are the N- base region and the P base region;

　　The four semiconductor layers form three PN junctions: J1 (anode side), J2 (middle), and J3 (cathode side);

　　The gate is connected to the P base region, and the gate and cathode are formed with a dense, interlaced finger-like structure—this is the key process that distinguishes a GTO from a conventional thyristor, aiming to ensure that the anode current is uniformly and quickly drawn into the gate circuit during turn-off, preventing localized overheating and burnout.

　　2. Conduction Principle (based on "injection")

　　When a positive current pulse is applied to the gate, gate current is injected into the P-base region;

　　A large number of charge carriers cause avalanche breakdown in the J2 junction, and the PNPN four-layer structure establishes regenerative positive feedback (the two internal "equivalent transistors" amplify each other);

　　The device quickly enters the conduction state, with a large current of several thousand amperes flowing through the anode, while the on-state voltage drop is only about 1~2V;

　　Once conduction occurs, it is self-sustaining due to the large anode current, and the gate only needs to provide a sustaining current (usually automatically adjusted by the drive unit according to temperature) to maintain conduction.

　　3. Turn-off Principle (Relying on "Draining," a unique capability of GTOs)

　　Apply a negative current pulse to the gate;

　　The negative gate current draws a large number of holes from the P-base region, reverse-biasing the J3 junction (gate-cathode junction), and stopping the cathode from injecting electrons into the device;

　　The regenerative positive feedback within the four-layer structure is disrupted, forcing the anode current to "intercept" and transfer to the gate circuit;

　　The device completes turn-off, and thereafter, a continuous negative bias voltage is applied by the gate drive unit to maintain the device in a stable blocking state.

　　4. Summary of Operating Characteristics

　　Asymmetric Design: This device only withstands blocking voltage in the forward direction, with very weak reverse blocking capability (typically only able to withstand tens of volts). Therefore, a freewheeling diode must be connected in anti-parallel in the circuit, hence the name "Asymmetric GTO."

　　Suitable for medium-frequency switching applications (switching frequencies are typically in the hundreds of Hz range), not suitable for ultra-high frequencies.

　　Both turn-on and turn-off have their own switching losses, requiring the design of snubber circuits to control di/dt and dv/dt.

　　III. Application Areas

　　This 4500V/multi-kiloampere GTO is designed for high-voltage, high-current, medium-frequency, high-power converter applications. Main applications include:

　　Rail Transit Traction Converter (Most Typical): Used in locomotives, EMUs, subways, and light rails as traction inverters, converting DC power from the overhead contact line or third rail into three-phase AC power to drive the traction motor, while simultaneously achieving regenerative braking energy feedback. ABB developed modular high-power converters centered on GTOs for mainline traction locomotives, employing oil-immersed cooling.

　　Medium-voltage high-power variable frequency drives (MV Drives) are used in mine hoists, rolling mill main drives, large fans/pumps/compressors, and marine electric propulsion, providing precise speed control for high-voltage, high-power AC motors.

　　High-power static frequency converters (SFCs) are used, for example, in pumped storage power station unit starting devices and high-power AC-AC converters; ABB once used GTOs in series and parallel to construct a 100MVA-class static frequency converter.

　　High-power power supply equipment is used in applications requiring high current conversion, such as induction heating power supplies and electrolysis/electroplating rectifier power supplies.

　　Power system compensation and transmission include static var compensators (SVCs/STATCOMs) and early HVDC converter stations.

　　Macroscopic function summary: It is a high-efficiency, high-power switch connecting the "DC high-voltage bus" and the "AC load," determining the capacity limit and efficiency of high-power power conversion systems. It was a core component of high-power power electronic devices from the 1980s to the 2000s.

　　IV. Usage Environment and Supporting Requirements

　　Required Driver: ABB GTO gate unit (e.g., GV A587 series) is required. This driver provides the turn-on pulse, temperature-regulated gate current, turn-off pulse, and negative bias voltage after turn-off. Control commands and status feedback are transmitted via fiber optic cable.

　　Cooling Method: Press-pack packaging with double-sided cooling. A suitable heatsink (air-cooled or water-cooled) is required to ensure the junction temperature remains within acceptable limits. The junction temperature range for similar ABB 4.5kV high-voltage devices is approximately -40~125℃.

　　Installation Method: Press-pack mounting with the specified pressure is required to ensure good contact resistance and heat dissipation.

　　Electrical Environment: Asymmetric devices only block in the forward direction; an anti-parallel freewheeling diode is required. For 4.5kV devices in open air or at sea level, a DC bus voltage of approximately 2800V is recommended (excluding 100 FIT from cosmic rays). Failure rate limits (reference values for family specifications)

　　Environmental conditions: Installed in an industrial converter cabinet, typically requiring an ambient temperature range of approximately -40 to +50°C, with proper moisture-proof, dust-proof, and corrosion-proof treatment.

　　Protection requirements: High requirements are placed on heat dissipation design, di/dt/dv/dt limits, and overcurrent protection (fast fuse/gate protection). The absorption circuit must be designed according to the datasheet application guide.

1.Do you offer global shipping?

Yes. We have local distribution centers on every continent, enabling us to quickly ship parts to anywhere in the world.

2. What payment methods and currencies do you accept?

To make your purchasing process as simple and convenient as possible, we offer a variety of payment methods, including bank transfer, cheque, and PayPal. We also accept most major credit and debit cards, such as Visa, Mastercard, and American Express. We accept payments in most major global currencies, but we recommend using US Dollars (USD), British Pounds (GBP), or Euros (EUR). Using other currencies may incur additional fees. All transactions are securely processed by HSBC and HSBC Merchant Services.

3.How much parts do you currently have in stock?

We have a vast inventory of new, refurbished, and used automation components, including products from well-known manufacturers such as ABB and Schneider Electric. If you can't find the part you need, don't worry. We work closely with professional suppliers worldwide, and even if the part you need isn't listed on our website, we can provide you with a tailored quote.

4.Who should I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.

Your email address will not be published. Required fields are marked *

Your rating*

Name*

Email*

Code*

Your review*

Save my name,email,and website in this browser for the next time｜comment.

Previous article Next article