Diode module MD4-400-18-C1

Average forward current, ITAV/IFAV 400A
Voltage, VRRM/VDRM 1000 – 1800V
Voltage code, VRRM / 100 10 – 18
MD4-400-18-C1 on request
Weight 0.86 kg
Dimensions LxBxH
Datasheet Datasheet

Power rectifier diode module MD4-400-18-C1 AS ENERGITM in an international standard package, 400A 1800V.

Used to convert DC and AC currents up to 400 ampere, with a frequency of up to 500 Hz on circuits with voltages up to 1800 volt (18 class).

Diode modules MD4-400-18-C1 are in a standard package C1: base dimensions 50x92 mm, housing height – 52 mm, weight – 0.86 kg. Two-position module is a monolithic construction of two semiconductor diodes: type diode-diode. Module connection diagram MD4-400-18-C1 – common cathode.

Series (ratings) of diode modules: MD4-400-10-C1 (400A 1000V), MD4-400-12-C1 (400A 1200V), MD4-400-14-C1 (400A 1400V), MD4-400-16-C1 (400A 1600V), MD4-400-18-C1 (400A 1800V).

Modules connection diagram MD4-400-18-C1
  • Main terminals are at the top of the case and are numbered 1, 2, 3;

High thermal cyclic resistance and reliable operation of low-frequency diode modules MD4-400-18-C1 when switching high currents is achieved due to their design features and stable parameters of galvanic isolation.

The MD4-400-18-C1 diode modules have a clamp-on design that provides easy mounting and good contact with the cooler for heat dissipation. Several modules can be mounted on one cooler without additional insulation, which significantly reduces the overall dimensions of the assembly. Between the module and the heat sink (heat sink) it is recommended to use a thermally conductive substrate lubricated with thermal paste.

The two-position modules have different wiring diagrams (electrical circuit diagrams): MD3half-bridge; MD4common cathode circuit; MD5common anode circuit.

Our modules are offered in several dual and single device topologies for almost all phase control or rectifier applications.

Our company provides a quality guarantee for thyristor / diode modules of 2 years from the date of purchase. When supplying thyristor / diode modules, if necessary, we provide technical passport and certificate of conformity.

Read more

The final price for thyristor / diode modules depends on the class, quantity, delivery terms, manufacturer, country of origin and form of payment.

General specifications of diode-diode module MD4-400-18-C1:

Diode module specifications MD4-400-18-C1
Maximum allowable average forward current (Case temperature) IF(AV) (TC) 400 А (106ºC)
445 А (100ºC)
Repetitive pulsed reverse voltage; Repetitive pulsed closed state voltage VRRM/VDRM 1800 V
Surge on-state current IFSM 12.0 kA
Peak on-state voltage VFM 1.20 V
Peak on-state current IFM 785 A
Threshold voltage V(TO) 0.75 V
On-state slope resistance rT 0.250 mΩ
Junction temperature Tj max 125 ºC
Maximum case operating temperature Tc max 125 ºC
Thermal resistance, junction to case Rth(j-c) 0.1100 ºC/W
Electrical insulation strength VISOL 3.00 kV
Design (switches) - dual component
Type (circuit diagram) - diode-diode
Connection diagram - common cathode
Weight W 0.86 kg
Package - C1
Dimensions, mm L×B×H 92x50x52 mm
Datasheet PDF PDF

Part numbering guide for diode–diode modules MD4-400-18-C1:

MD 4 400 18 C1 N
MD Diode module, brand AS ENERGITM
4 Connection diagram:
3 – half-bridge;
4 – common cathode circuit;
5 – common anode circuit.
400 Rated current IF(AV), A.
18 Voltage class VRRM / 100   (Nominal voltage – 1800 V).
C1 Housing type.
N Ambient conditions: N – Normal.

Dimensions of power diode modules MD4-400-18-C1:

Dimensions of diode modules MD4-400-18-C1

Package C1

Diode module connection diagram MD4-400-18-C1:

Diode module connection diagram MD4-400-18-C1

1, 2, 3 – main terminals.

icon Why choose AS ENERGITM

  • Own production facilities, including semiconductor silicon chips production
  • European brand - 100% quality, favorable price, short production terms
  • Over 20 years of experience in the semiconductor industry
  • Clients from more than 50 countries trust us
  • 20000 items in the product line for currents from 10A to 15000A, voltages from 100V to 9000V
  • We produce analogues of other manufacturers' products
  • Guaranteed certified quality, warranty period of operation - 2 years


Quality Warranty

Our products are certified and correspond to international standards.
Our company provides a quality guarantee for products of 2 years.
We provide certificates of conformity, reliability reports, data sheets and technical passports at the request of the customer.


Each product is tested for the main parameters, and Test reports of the parameters for each product are provided.

Test Report

Geography of partnership

AS ENERGITM company manufactures and supplies power semiconductors to more than 50 countries around the world.


Logistics and Delivery

We deliver our products all over the world with the services of logistics companies: DHL, TNT, UPS, EMS, Fedex, Aramex.
Products can be delivered by any means of transport: air, sea, rail and road.


AS ENERGITM Semiconductors Manufacturing

Our products range includes rectifier diodes, phase control thyristors in disc and stud design, avalanche diodes and thyristors, fast switching, high frequency thyristors, fast recovery, welding and rotor diodes, triacs, bridge rectifiers, power modules (thyristor, diode, thyristor-diode, IGBT), and air and water heatsinks to them.

Power diodes and thyristors are produced for currents from 10A to 15000A, voltage range from 100V to 9000V.
Power diode and thyristor modules are produced from 25A and up to 1250A, voltage range 400V - 4400V.
The range of power semiconductors also includes equivalent, replacement, analogue and alternative semiconductor devices of global manufacturers.

Featured Products:


Tags: MD4-400-18-C1 buy diode modules, diode module price, powerful diode modules, high voltage diode modules, diode module class, diode modules MD4-400 buy in Ukraine, semiconductors, diode, diode modules, rectifier diode MD4, diode power module MD4, inverter, diode rectifier


Selected Products: