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Product Overview
DSE30H12P provides a single 30A 1200V soft-recovery rectifier in TO-247AC. It supports higher-current conversion, freewheel and clamp stages that require one rectifying path rather than a shared-node dual diode.
The device specifies 70ns maximum reverse-recovery time under a defined 0.5A test condition. Forward-voltage and thermal data support evaluation of the diode within the complete cooling and switching circuit.
Key Features
● 1200V repetitive peak reverse voltage with a 30A current rating.
● 70ns maximum reverse-recovery time under the specified 0.5A test condition.
● 3.2V maximum forward voltage at 30A and 25°C.
● 250A non-repetitive surge current for a 8.3ms pulse.
Key Specifications
| Parameter | Value and conditions |
| Configuration / package | Single diode / TO-247AC |
| Forward current | 30A |
| Repetitive peak reverse voltage | 1200V |
| Forward voltage | 1.95V typ at IF = 30A, Tj = 125°C 3.2V max at IF = 30A, Tj = 25°C |
| Reverse recovery time | 70ns max; Tj = 25°C, IF = 0.5A, IR = 1.0A, Irr = 0.25A |
| Surge current | 250A; non-repetitive, t = 8.3ms |
| Junction to case thermal resistance | 1.2°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 DSE30H12P 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
● Industrial power converters.
● UPS freewheel and conversion stages.
● Higher-output charging equipment.
A Single Junction for the 30A Current Class
The 30A function is carried by a single rectifying junction. TO-247AC mounting and 1.2°C/W junction-to-case thermal resistance provide a distinct mechanical and thermal option compared with a smaller TO-220AC device.
Design Notes
Design the cooling system for the actual current waveform and dissipation. The 30A rating is not an unconditional free-air operating current. Check reverse-voltage peaks, including switching transients, against 1200V.
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.
The 70ns recovery limit uses the low-current test condition in the parameter table. Evaluate recovery at the application current and temperature. The 250A surge specification is non-repetitive and must not be used as a repetitive overload rating.
FAQ
The H-series selection emphasizes a different conduction and recovery balance. Compare soft turn-off, current rating, VF, and measured circuit loss, not trr alone.
No such free-air 30 A condition is stated. Use the 1.2°C/W case path with a designed thermal interface.
For a worst-case check, use the 3.2 V maximum at 30 A and 25°C, then evaluate the temperature-dependent curves.
No. The sheet identifies the metal back as cathode. Add electrical insulation where the heatsink potential differs.
