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Product Overview
DSC40120P combines 40A current capability and 1200V reverse blocking in a TO-247AC SiC Schottky diode. Its 0.27°C/W junction-to-case thermal resistance supports designs with a controlled heatsink or cold plate.
The 40A rating is specified at Tc = 140°C. Typical capacitive charge is 204nC at 800V and 25°C, providing a defined point for evaluating commutation behavior.
Key Features
● 1200V repetitive peak reverse voltage with a 40A current rating.
● 204nC typical capacitive charge at 800V and 25°C.
● 1.53V maximum forward voltage at 40A and 25°C.
● 400A non-repetitive surge current for a 8.3ms pulse.
Key Specifications
| Parameter | Value and conditions |
| Configuration / package | Single diode / TO-247AC |
| Forward current | 40A at Tc = 140°C |
| Repetitive peak reverse voltage | 1200V |
| Forward voltage | 1.40V typ / 1.53V max at IF = 40A, Tj = 25°C 2.15V typ / 2.36V max at IF = 40A, Tj = 175°C |
| Capacitive charge | 204nC typ at VR = 800V, Tj = 25°C |
| Surge current | 400A; non-repetitive, t = 8.3ms |
| Junction to case thermal resistance | 0.27°C/W |
| Junction temperature range | −55°C to +175°C |
Current capability depends on case temperature and cooling. Use the datasheet derating curve when determining operating current.
Electrical Configuration and Pinout
With the marking face toward you and the leads pointing down, the left lead is K (cathode) and the right lead is A (anode). The exposed mounting tab is electrically connected to K.
Figure 1. Circuit and connection detail from the DSC40120P datasheet, page 1. A = anode; K = cathode.
| Connection | Function |
| Left lead | K — cathode |
| Right lead | A — anode |
| Metal tab | K — electrically connected to the cathode |
Typical Applications
● High-voltage charging converters.
● Energy-storage conversion equipment.
● Industrial boost and clamp stages.
40A SiC Rectification with a Defined Thermal Path
The 40A hot-case current class and 0.27°C/W internal thermal path suit higher-current 1200V stages. Evaluate the 204nC typical capacitive charge alongside conduction loss, switching frequency and the external cooling assembly.
Design Notes
The 40A operating point is tied to Tc = 140°C. Include conduction loss, commutation loss, the thermal interface and heatsink when determining usable current. Check reverse-voltage peaks against the 1200V limit.
The metal tab carries the cathode potential. If the heatsink must remain at a different potential, use an appropriate insulating mounting interface and include its thermal resistance.
Capacitive charge is a typical characterization value, not a guaranteed maximum. Compare devices at the same reverse voltage and temperature; converter efficiency also depends on forward loss, the companion switch and operating frequency.
FAQ
SiC Schottky switching is dominated by capacitive effects rather than minority-carrier recovery. Use QC, capacitance, stored energy, and the circuit waveform.
No. The sheet lists 40 A at Tc = 140°C and 107 A at Tc = 25°C. Design to the actual case temperature and current waveform.
At 175°C and 40 A, use up to 2.36 V from the datasheet maximum table for a worst-case check.
The positive temperature trend can aid sharing, but layout symmetry, dynamic current, thermal coupling, and supplier guidance still require validation.
