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The GBI25J-LV by Diotec Semiconductor is a rectifier bridge in GBI single inline case. It offers 10% lower forward voltage drop per single diode, compared to the standard version GBI25J. Since always two diodes are conducting per mains half-cycle, the total power savings at the input bridge are even 20%. These parts have been developed for power supplies running 24/7, e. g. used to power up internet server stations. Output current is 25 A when case is kept at 80°C. Forward surge current rating is 325/360 A at 10/8.3 ms half sine wave pulse, and repetitive peak reverse voltage 600 V. Applications include server stations, computer networks, base stations, industrial controls and drives, and many more.

Features

• Low Vf diodes
• Up to 20% of energy savings
• Single inline case
• 7.5 … 10 mm pitch
• Easy heatsink assembly
• High forward surge current

Applications

• Power supplies operating 24/7
• Server stations
• Computer networks
• Base stations
• Industrial controls and drives
   

Specifications

• Nominal 25 A output current at 80°C case temperature (IFAV)
• Peak reverse voltage 600 V (VRRM)
• Forward voltage < 0.92 V at 12.5 A / 25°C (VF)
• Reverse current < 5 µA at 1000 V / 25°C (IR)
• GBI single inline case with 10 mm respectively 2x 7.5 mm pitch

Diotec Semiconductor is introducing their newest Silicon Carbide (SiC) MOSFET, DIF170SIC049 which features devices with low RDS(on) values of 49 mΩ. It is encapsulated in the TO-247-4L consisting Kelvin-Source pin enabling faster switching speeds and lower power losses. This part covers a comprehensive portfolio for various applications: Industrial drives, power conversion systems, EV chargers and PV inverters.

As modern electronic systems continue to push the boundaries of performance, efficiency, and compactness, upgrading the voltage system of an application often necessitates refined adjustments to the circuitry design, whether in discrete components or integrated circuits. This is precisely where Diotec’s newly launched DIF170SIC049 comes into spotlight. Engineered for superior reliability, it ensures an extended safety margin specifically against sudden voltage overshoot caused parasitic passive components. Either deployed in four forming an H-bridge for charging a battery, or even as six intricate switches in a three-phase inverter, the DIF170SIC049 delivers reliable performance under both soft- and hard switching conditions, ensuring robust operation and long-term circuit stability. Its maximum RDS(on) of 49 mOhm also minimizes conduction and switching losses, maintaining overall system efficiency and enhanced thermal performance. By combining the inherent robustness of SiC technology with its optimized switching dynamics, Diotec empowers designers to confidently pioneering the next-generation innovation.

Features

• High reverse breakdown voltag
• Advanced Planar technology
• Low on-state resistance
• Fast switching time with low capacitance
• Low Gate charge
• Low total switching energy
• Engineering samples available

Applications

• Charging systems for electric vehicles (EV)
• Solar inverters
• Telecom power supplies
• Power Factor Correction (PFC)
• Switched-mode power supply (SMPS)
• DC/DC converters
• Industrial machinery
• Motor Drive

Specifications

• 1700 V drain-source voltage (VDSS)
• Maximum 49 mΩ on-state resistance (RDS(on))
• 100 µA drain-source leakage current (IDSS)
• From to -8 V to 22 V continuous gate-source-voltage (VGSS)
• Recommended turn-on Gate voltage VGS(on)of 18 V
• Recommended turn-off Gate voltage VGS(off)of -4 V
• 357 W power dissipation (Ptot)
• Up to 150 A peak drain current (IDM)
• 0.21 K/W maximum thermal resistance (RthC)
• -55°C to +175°C operating junction temperature range (Tj)
• Industrial TO-247 with 4 leads

Reliability, safety and operation under adverse and sometimes extreme conditions play a central role in train electronics. Railway systems operate in wide temperature ranges and are exposed to vibrations and shocks. The pantograph's up and down movement causes high-energy arcing, which leads to voltage spikes in the train's electrical system – a threat to any type of electronics. Voltage drops and the subsequent restoration of voltage are the triggers for strong vibrations due to the inductance of the 100-metre-long and longer carriage cabling. A failure of railway electronics leads to delays in the best case scenario and, in the worst case, can endanger human health and life. It is time to take a look at the influence and importance of selecting the right semiconductor components.

First of all, designers should consider safety margins that exceed the values commonly used in conventional industrial circuits. Rectifiers or MOSFETs operating in a 110 V DC system would normally be selected with a permissible reverse voltage of 200 V. For the voltage spikes mentioned above, the use of 400 V types or even higher values is not an exaggeration. It is advisable to use only avalanche-rated parts, as these parts are designed and tested to withstand a defined surge energy. Forward peak current and reverse peak pulse power are parameters that lead to immediate failure if their maximum ratings are exceeded. If the amount of energy is known, e.g. through measurements in the circuit and based on calculations, it is again advisable to select components that can withstand at least twice that amount.
The additional costs for these high-quality components are certainly money well spent, as they increase the reliability of passenger transport vehicles. The savings in negative follow-up costs associated with failures, fault analysis, redesign and repairs are strategically important.

Secondly, there is an area of application that requires the same high level of reliability and qualification, but which is often overlooked by railway electronics engineers. We are talking here about automotive environments and the appropriately qualified semiconductors. These components meet the strict AEC-Q101 standard and are specially designed to function reliably under adverse environmental conditions. This makes them particularly attractive for trains. They offer high reliability and a long service life, as they are subjected to intensive testing and ageing simulations. The components remain stable even at extreme temperatures and feature improved surge and short-circuit resistance. This reduces maintenance costs and ensures smooth operation of trains on the rail network – a desirable design goal. Despite higher acquisition costs, automotive components pay for themselves through lower failure rates, less maintenance and longer replacement cycles.

Thirdly, semiconductor manufacturers' expertise is available. Semiconductor manufacturers know which component is the perfect choice for your specific ecosystem and environmental conditions. Their FAE and QA engineers can tell you which qualification level is recommended for a particular application and inform you about failure rates and life expectancy. Manufacturers are fully aware of the built-in safety margins of their components, the parameter variations typical for each semiconductor, and their temperature drift.

Years of experience in special applications in specific environments can thus be integrated into customer products. 

In summary, above-average safety margins, semiconductors qualified for the automotive sector and early consultation with the manufacturer's experts are the right way forward.

The result is reliable, robust, long-term available and, in any case, safety-relevant designs. This contributes significantly to optimising operational safety, maintenance intervals and total cost of ownership in the railway sector.

In single-phase AC input stages, two rectifier diodes conduct during every mains half-cycle. Consequently, the forward voltage drop directly determines conduction loss, thermal loading and long-term reliability during continuous operation.

The Diotec GBI25J-LV is a 25 A, 600 V bridge rectifier optimized for low forward voltage under typical load conditions. At a forward current of 12.5 A, the forward voltage remains below 0.92 V per diode. With two diodes permanently in the current path, this reduction in V_F lowers total conduction losses by up to 20% compared with conventional bridge rectifiers — under nominal operating conditions, not only at peak load.

The device is rated for an average output current of 25 A at a case temperature of 80 °C, supporting high current density in compact power designs. Surge current capability reaches 325/360 A, providing comfortable margin against inrush events and transient overloads. Reverse leakage current is specified at below 5 µA, supporting efficiency and thermal stability across operating temperature ranges.

The GBI25J-LV is supplied in a GBI single-inline package with asymmetric pin pitch of 2x 7.5 mm and 10 mm. The package supports direct heatsink mounting, enabling efficient thermal coupling and predictable temperature control in high-power designs.

Typical applications include server and data center power supplies, telecommunications and base station equipment, network infrastructure and continuously operating industrial power systems, in which rectifier conduction losses accumulate with every mains cycle, directly affecting system efficiency and lifetime.