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High Voltage Resistance Blocking Diode DKA40BA300

High Voltage Resistance Blocking Diode

For safety reason, in a solar power system, the backflow prevention diode module needs a reverse breakdown voltage twice the value of the string voltage. We have developed a low loss backflow prevention diode module with an ultra-high breakdown voltage of 3000V for DC 1500V strings.

According to IEC60364-7-712 standard, maximum voltage must be twice the open circuit string voltage. (U OC STC)

Features

  • Voltage Reverse DC 3000V isolated package (per chip)
  • Our unique technology achieves "low loss" and "high heat dissipation" despite high breakdown voltage.
  • High voltage strings benefits
    Higher string voltage reduces loss in the entire power generation system and improves its efficiency.
    Fewer parallel strings means reduced number of junction boxes and lower installation costs.

Applications

  • Junction box for Solar (PV) power generation
  • Reverse current prevention for DC line
    such as electric storage equipment

Maximum Ratings

Tj = 25℃ unless otherwise specified

Item Symbol Unit Ratings
DC Reverse Voltage VR(DC) V 3000
Item Symbol Unit Ratings Conditions
Average Forward Current IF(AV) A 20 DC Tc=125℃
Surge Forward Current IFSM A 830/910 50/60Hz, Sin.Wave, Peak Value, Non-repetitive
I2t (for fusing) I2t A2s 3440 Value for one cycle of surge current
Isolation Voltage VISO V 4500 Terminals to case, AC RMS 1 minute
Operating Junction Temperature Tj -40 to +150 -
Storage Temperature Tstg -40 to +125 -
Mounting Torque Mounting (M6) - N・m
(kgf・cm)
4.7(48) Recommended value 2.5 to 3.9(25 to 40)
Terminal (M5) 2.7(28) Recommended value 1.5 to 2.5(15 to 25)
Mass - g 150 Typical value

Electrical Characteristics

Tj = 25℃ unless otherwise specified

Item Symbol Unit Ratings Conditions
Min. Typ. Max.
Reverse Current IR mA - - 10 VR = 3000V, Tj=150℃
Forward Voltage VF V - 0.94 1.15 IF = 20A Inst. measurement
Thermal Resistance Rth(j-c) ℃/W - - 0.64 Junction to Case (per Chip)
Interface
Thermal Resistance
Rth(c-f) ℃/W - 0.09 - Case to Heat Sink
Thermal conductivity (Silicone grease) ≒ 9×10-3[W/cm・℃]

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