Rectifier Diode 400A type D271-400X (300V – 1800V), reverse polarity
|Average forward current, IFAV||400A|
|Voltage code, VRRM / 100||3 – 18|
Rectifier Stud Diode D271-400X AS ENERGITM is general purpose diode. This is a power p-n junction diode designed for converting DC and AC currents up to 400A with frequency up to 500Hz in circuits with voltages up to 300V – 1800V (voltage class from 3 to 18). Diode package – SD7, mounting standard thread – М24х1.5, (on request, UNF thread 3/4"-16UNF-2A), weight – 465 g.
Diodes are supplied in stud design. Polarity of the diode is marked by a polarity symbol on the case.
Forward polarity diode – the threaded base of the diode is the Anode, the flexible power lead is the Cathode.
Reverse polarity diode – threaded base is the Cathode, the flexible power lead is the Anode.
Forward polarity is not indicated in the part numbering; Reverse polarity is indicated by an "X" in the part numbering.
This power diode can be an alternative product, replacement, analog, equivalent for other types diodes 350A, 370A, 390A, 400 amp in a stud mount package.
Air and water heat sinks are used to cool the diodes. To provide reliable thermal and electrical contact with the heatsink a tightening torque Md must be observed during assembly. For better heat dissipation of diode during assembly, heat conducting paste is used.
The diodes have a hermetic ceramic housing isolating the functional part and the semiconductor element from mechanical impacts and environment. Stud screw fit diode with a flexible power lead. Stud diodes are notable for their ability to be used on moving parts.
Specifications and parameters, datasheets PDF, sample technical passport, dimensions, outline drawings, case diagrams diodes, recommended heat sinks are listed below.
Our company provides a quality guarantee for power diodes of 2 years from the date of purchase. When supplying diodes, if necessary, we provide technical passport, certificate of conformity.
Diode ratings: D271-400X-3 (400A 300V), D271-400X-4 (400A 400V), D271-400X-5 (400A 500V), D271-400X-6 (400A 600V), D271-400X-7 (400A 700V), D271-400X-8 (400A 800V), D271-400X-9 (400A 900V), D271-400X-10 (400A 1000V), D271-400X-12 (400A 1200V), D271-400X-14 (400A 1400V), D271-400X-16 (400A 1600V), D271-400X-18 (400A 1800V).
The final price for phase control stud diodes depends on the voltage class, quantity, delivery terms, manufacturer, country of origin and form of payment.
General specifications of rectifier diodes D271-400X:
|Maximum allowable average forward current (Case temperature)||IF(AV) (Tcase)||400 A (150ºC)
592 A (120ºC)
|Repetitive peak reverse voltage||VRRM||300-1800 V|
|RMS forward current||IFRMS||628 A|
|Surge non-repetitive current||IFSM||13.0 kA|
|Safety factor||I2t||840 kA2·s|
|Peak forward voltage, max||VFM||1.45 V|
|Peak current||IFM||1256 A|
|On-state threshold voltage, max||VF(TO)||0.80 V|
|On-state slope resistance, max||rT||0.53 mΩ|
|Repetitive peak reverse currents, max||IRRM||40 mA|
|Temperature of p-n junction, max||Tvj max||190 ºC|
|Thermal resistance, junction to case, max||Rth(j-c)||0.085 ºC/W|
|Mounting torque||Md||30±5 N·m|
|Weight, approx.||W||465 g|
|Package type, Thread||Outline||SD7
|Recommended heatsinks||Heatsinks||O181, O281, OM105|
Part Numbering Guide for Rectifier Stud Diode D271-400X:
|D||–||Diode, AS ENERGITM|
|271||–||Diode type (stud type).|
|400||–||Average forward current in open state IF(AV), Amp.|
|X||–||None = Forward polarity diode: threaded base – Anode, flexible power lead – Cathode;
X = Reverse polarity diode: threaded base – Cathode, flexible power lead – Anode.
|18||–||Voltage class VRRM / 100 (Nominal voltage – 1800 V).|
|U||–||None = stud base metric ISO threads (standard);
U = stud base inch UNF threads (on request).
Diode D271-400X datasheet:
Download pdf datasheet for diodes D271-400X
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Heat sinks for power stud diodes:
Heat sinks (radiators) are used for cooling of power semiconductor devices in stud design.
Heat sinks of coolers are made of aluminum radiator profiles and do not require additional protective coating when used in various climatic conditions.
See for more information about heatsinks: "Air-cooled heatsinks for stud devices".
Photo of Stud Type Rectifier Diodes:
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Power diodes and thyristors are produced for currents from 10A to 15000A, voltage range from 100V to 9000V.
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