Slkor SL50T120FZ High-Power IGBT Discrete: 1200V Industrial-Grade Power Switching Device

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2026-09-03 50

In high-power power electronic systems such as industrial inverters, inverter welders, UPS power supplies, photovoltaic energy storage converters and induction heating equipment, the voltage withstand capability, current carrying capacity, heat dissipation performance and wide-temperature reliability of power devices directly determine the overall efficiency and operational safety of the whole equipment. The Slkor SL50T120FZ is a high-power Insulated Gate Bipolar Transistor (IGBT) discrete device packaged in TO-264. It features 1200V high collector-emitter voltage resistance, 50A continuous current rating at 100℃ case temperature, 535W high power dissipation and a wide junction temperature range from -55℃ to 175℃. With excellent heavy-load output capacity, low loss and superior thermal stability, it serves as a high-quality domestic alternative core power device for industrial high-power conversion equipment.

1. Core Electrical Parameters

Device Type: Single IGBT Discrete Collector-Emitter Voltage (VCE): 1200V Collector Current (IC @ TC=100℃): 50A Total Power Dissipation (PD @ TC=25℃): 535W Operating Junction Temperature (TJ): -55℃ ~ 175℃ Package: TO-264

2. Core Product Advantages

2.1 1200V High Voltage Resistance with Sufficient Safety Margin

Equipped with 1200V high collector-emitter withstand voltage, the SL50T120FZ effectively suppresses circuit surge voltage and spike pulse impact, greatly reducing the risk of device breakdown and failure. Fully adapted to high-power industrial conversion scenarios with 380V AC input, it meets strict safety design requirements of high-voltage inverter systems and delivers outstanding voltage impact resistance.

2.2 50A High Continuous Current for Stable Heavy-Duty Operation

Maintaining a continuous collector current of 50A even at a high case temperature of 100℃, the device exhibits excellent high-temperature current-carrying performance. It ensures stable current output during long-term full-load operation without power derating or insufficient output power, perfectly matching continuous heavy-load working conditions of welding machines, frequency converters and other industrial equipment.

2.3 TO-264 High-Power Package for Excellent Heat Dissipation

Adopting the standard TO-264 through-hole power package with a large-area metal thermal base, the device features low thermal resistance and can be closely fitted with external heat sinks for efficient heat conduction. With a high power dissipation of 535W, it withstands extreme power loss, relieves thermal accumulation under high-load conditions and significantly improves long-term operational reliability of the whole system.

2.4 Ultra-Wide Temperature Adaptation for Harsh Industrial Scenarios

Supporting an ultra-wide junction temperature range of -55℃ to 175℃, the SL50T120FZ operates stably in extremely low-temperature outdoor environments and high-temperature enclosed chassis conditions. It resists severe cold and thermal shock, fully adapting to complex and harsh industrial working environments.

2.5 Optimized Loss Characteristics for Higher System Efficiency

Adopting mature trench gate field-stop technology, the device balances low conduction loss and low switching loss, delivering excellent high-speed switching performance. It effectively reduces thermal loss during power conversion, improves overall energy conversion efficiency and lowers system heat dissipation costs.

2.6 Reliable Domestic Replacement with Stable Mass Production Quality

Backed by Slkor’s mature power semiconductor mass-production process, the SL50T120FZ features consistent electrical parameters and strong short-circuit withstand capability. It provides pin-to-pin compatibility with imported equivalent IGBT devices, effectively solving industry pain points such as long lead times, insufficient supply and high costs of imported components, making it ideal for large-scale industrial mass production.

3. Main Application Fields

With integrated advantages of high voltage resistance, large current capacity, excellent heat dissipation and wide-temperature stability, the Slkor SL50T120FZ is widely applied in various high-power power electronic devices, including industrial frequency converters, servo drive power supplies, inverter welding machines, plasma cutting equipment, UPS uninterruptible power supplies, photovoltaic inverters, energy storage converters, induction heating equipment, high-power switching power supplies, industrial motor drives and high-power charging pile power units.

4. Engineering Design Guidelines

Voltage Margin Design: Reserve sufficient voltage margin in practical applications. Avoid long-term operation close to the 1200V extreme rating to prevent device damage caused by voltage surges.

Thermal Management: Equip the TO-264 package with a properly rated heat sink and apply thermal grease evenly. Monitor case temperature and junction temperature during long-term high-power operation to avoid over-temperature failure.

Gate Drive Matching: As a voltage-driven IGBT device, it requires matched gate drive voltage and gate resistance to optimize switching speed, suppress oscillation and reduce switching loss and electromagnetic interference.

Parallel Operation Suggestion: For capacity expansion via parallel connection, screen devices with consistent parameters and implement current sharing design. Utilize the positive temperature coefficient of saturation voltage drop to ensure balanced current distribution.

Operating Limit: Do not operate beyond the rated current, power dissipation and junction temperature range. Pay close attention to pulse width and heat dissipation conditions for pulsed operating scenarios.

5. Product Summary

The Slkor SL50T120FZ is an industrial-grade high-power IGBT discrete device in TO-264 package. Featuring 1200V high voltage resistance, 50A high-temperature current capacity, 535W high power dissipation and -55℃~175℃ ultra-wide junction temperature range, it integrates high voltage endurance, high-temperature heavy-load performance, excellent heat dissipation and low-loss characteristics. It is perfectly suitable for industrial inverter, welding, energy storage and high-power power supply scenarios, serving as a cost-effective and reliable domestic alternative for high-power IGBT discrete devices.

Slkor introduction
According to Song Shiqiang, Slkor Semiconductor (https://www.slkormicro.com) grandly opened its third franchised store in Huaqiangbei on August 14, 2026. The store mainly offers MOSFETs, power-management ICs, Hall elements, optocouplers, IGBTs, SiC silicon-carbide components, AC/DC devices, TVS diodes, Schottky diodes, thyristors and other electronic components.

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