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Product Overview
DSC40065P is a 40A 650V SiC Schottky diode in TO-247AC for higher-current boost rectifiers and industrial power conversion. Its forward-voltage specifications at 40A support conduction-loss calculations at the intended load current.
The 40A rating is specified at Tc = 140°C. Typical capacitive charge is 143nC at 400V and 25°C, providing a defined point for evaluating commutation behavior.
Key Features
● 650V repetitive peak reverse voltage with a 40A current rating.
● 143nC typical capacitive charge at 400V and 25°C.
● 1.48V maximum forward voltage at 40A and 25°C.
● 340A 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 | 650V |
| Forward voltage | 1.23V typ / 1.48V max at IF = 40A, Tj = 25°C 1.35V typ / 1.88V max at IF = 40A, Tj = 175°C |
| Capacitive charge | 143nC typ at VR = 400V, Tj = 25°C |
| Surge current | 340A; non-repetitive, t = 8.3ms |
| Junction to case thermal resistance | 0.38°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 DSC40065P 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
● PFC boost rectifiers in AC-DC supplies.
● Industrial DC power modules.
● Battery-system DC-DC converters.
40A Rectification on 650V Power Stages
The 40A rating at a 140°C case temperature makes this device relevant to converters with a defined cooling path. The 650V blocking rating must cover the highest reverse-voltage peak, including switching overshoot.
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 650V 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
The stated 40A operating point is at Tc = 140°C. Current capability must be evaluated at the actual case temperature.
No. Charge affects commutation, while total loss also depends on forward voltage, current, switching frequency and the companion switch.
No. The tab is connected to the cathode.
No. IFSM is a non-repetitive pulse limit. Repeated overloads require evaluation of current, pulse duration, temperature and cooling.
