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SKNa 46/18 UNF In stock

SKNa 46/18 UNF Avalanche Diode 1800V, 45A

The SKNa 46/18 avalanche diode is an anode to stud device suitable for DC power supplies, field coil supply for DC motors and series connections for high voltage applications.

  • Avalanche type reverse characteristic up to 2000V
  • Hermetic metal case with glass insulator
  • Threaded stud ISO M8 or 1/4 – 28 UNF 2A2
  • Cooling via heatsinks
  • SKN: anode to stud and SKR: cathode to stud
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Product Details

General purpose avalanche rectifier diodes featuring controlled avalanche reverse voltage characteristics.

RoHS Compliant

Typical Applications

  • DC supply for magnets or solenoids (brakes, valves etc.)
  • Field coil supply for DC motors
  • Series connections for high voltage applications like dust precipitators

Refer to manufacturer’s datasheet for full technical information.

RoHS Compliant



, ,

Maximum Repetitive Reverse Voltage (VRRM)



Stud Screw Fit Diodes



RMS Forward Current (IFRMS)


Maximum Peak Surge Current (IFSM)


Maximum Surge Reverse Power Dissipation (PRSM)

12 kW

Operating Junction Temperature (TJ)

-40 to +180°C

Drain Current (ID)

40 / 57A

Value for Fusing (I2t)

2500 A2s

Maximum Forward Voltage Drop (VF)


Product Type

Avalanche Diode

Maximum Reverse Current, Drain Current (IR)


Thermal Resistance Junction to Case (RthJC)

0.85 K/W

Thermal Resistance Case to Heatsink (Rthc-s)

0.25 K/W

Breakdown Voltage V(BR) Min



RoHS Compliant

Semikron Danfoss is a leading manufacturer of semiconductor components, including power modules and systems. Based in Germany, Semikron Danfoss specialises in discrete semiconductors, transistors, diodes, thyristors, IGBTs, MOSFETs and thyristor diode modules. Semikron’s state-of-the-art semiconductor range enables customers to develop smaller, more energy efficient power electronic systems, reducing global energy demand.

Typical applications include power supplies, renewable energies (wind and solar power) and electric vehicles (private cars, vans, buses, lorries, forklift trucks, and more).


Semikron Danfoss is a leading global semiconductor manufacturer and focuses on new markets such as renewable energy and hybrid vehicles as well as industrial applications such as electric drives, welding machines, lifts, power supplies, pumps, conveyor belts, trains and trams.

Learn more about Semikron Danfoss products by getting in touch with GD Rectifiers.



SEMIKRON SKNa 46-18 Datasheet.pdf

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