Hitachi Energy's 4.5kV IGCT series (5SHY 35L4520 & 5SHY 65L4521) represents the pinnacle of integrated gate-commutated thyristor technology. Specifically designed for high-voltage scenarios such as new energy power generation, industrial drives, and rail transit, with the core breakthroughs of snubberless turn-off and extremely low conduction losses, it provides a comprehensive solution that combines "semiconductor-level precise control + mechanical-level reliability" for megawatt-scale systems.

突破行业瓶颈：限制参数

Note: The current and temperature tolerance of the 65L4521 series has been increased by 60%, making it suitable for more demanding working conditions.

Three major technological highlights

1. Bufferless turn-off revolution

· Eliminate the traditional Snubber circuit and reduce the system cost by 30%.

· The turn-off speed reaches 1900 A/μs (65L4521), reducing the switching loss by 50%.

2. 双面散热黑科技

· The thermal resistance is as low as 6.8 K/kW (65L4521), supporting flexible double-sided/single-sided heat dissipation.

· The design of the pressure equalizing installation force of 36 - 60 kN ensures zero failure of the thermal interface.

3. Light-controlled anti-interference architecture

· Optical fiber control interface (HFBR series optical modules)

· The electromagnetic immunity is >100 kV/μs, perfectly coping with the EMC challenges of the frequency converter.

实际测量性能：让数据说话。

1. Conduction efficiency

· The on - state voltage drop is only 1.4 V at 125°C (35L4520) and 1.12 V at 140°C (65L4521).

· The slope resistance is as low as 0.243 mΩ (65L4521), a 25% reduction compared to the previous generation.

2. Switching performance

· The turn - off delay is < 8 μs, and the energy loss is 22 - 32 J/pulse (at full load of 6500A).

· The external re - trigger pulse width is 700 - 1100 ns, avoiding the risk of false turn - on.

Scenario adaptation: TheCore of high-reliability high-voltage power conversion

· New energy power generation system

· High-power industrial drive

· Power supply for electrolytic hydrogen/aluminum production

· Energy hub for rail transit

Quality service: Lifecycle protection

· 20-year capacitor life model: Based on enhanced heat dissipation design (wind speed > 0.5 m/s)

· Visual diagnostic system:

Four-color LED indication (power/gate state/fault)

Fiber optic status feedback (SF port) for real-time monitoring

· Environmental adaptability: Certified by 5SZK9118, covering extreme conditions for transportation, storage, and operation.