Infineon Technologies D1800N44TVFXPSA1

Overview

D1800N44TVFXPSA1 from Infineon Technologies is a high-power, press-pack, two-sided cooled silicon rectifier diode designed for industrial AC/DC conversion in medium-voltage drive systems and traction rectifiers. It delivers 1800 A average on-state current at 100 °C case temperature, supports 4400 V repetitive peak reverse voltage, and handles 35 kA surge current (10 ms, 25 °C), enabling use in 3.3 kV–4.16 kV three-phase line-commutated rectifier bridges.

For engineers reviewing the D1800N44TVFXPSA1 datasheet, D1800N44TVFXPSA1 pinout, D1800N44TVFXPSA1 application, or D1800N44TVFXPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.0169 °C/W, two-sided cooling), forward voltage drop (1.32 V at 1.5 kA, 160 °C), and I²t rating (6125 × 10³ A²s at 25 °C) for short-circuit withstand capability in high-energy power electronics.

Technical Context

This device operates as a unidirectional, non-controlled, pressure-contact silicon rectifier with no gate control or recovery timing specification - it functions solely under natural commutation in phase-controlled or line-commutated converters. Its thermal design relies on symmetric clamping force (24–60 kN) across both anode and cathode surfaces to maintain low R_thJC and prevent pellet tilt-induced hot spots.

The on-state characteristic follows a four-parameter logarithmic model (A = −0.7537, B = 3.748×10⁻⁴, C = 0.3443, D = −0.0266) valid from 500 A to 9000 A at T_vj = 160 °C, enabling accurate conduction loss modeling in high-current DC link applications.

Key Specifications

Pinout & Package

Package: Press-pack, double-sided cooled, stud-mounted silicon rectifier diode with isolated anode and cathode metal terminals. Requires mechanical clamping (24–60 kN) between heatsinks for electrical contact and thermal conduction. Weight: ~600 g. Creepage distance: 25 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-power rectifier applications.

Compared with DD900N44K and SKKH 1800/44, D1800N44TVFXPSA1 provides superior thermal performance (0.0169 °C/W) and mechanical ruggedness for high-reliability, field-maintainable rectifier stacks - making it preferred for traction and industrial drive applications demanding long service life under thermal cycling.

Availability

D1800N44TVFXPSA1 is available at Aetrix Electronics and suitable for industrial medium-voltage drives, railway traction rectifiers, and high-power UPS systems requiring stable component supply, long lifecycle support, and traceable sourcing for safety-critical deployments.

Supply support for D1800N44TVFXPSA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power semiconductors, microcontrollers, and sensor solutions for industrial, automotive, and energy markets.

This part belongs to Infineon's "High Power Diodes" product line, engineered specifically for line-commutated rectification in multi-megawatt industrial and transportation systems where reliability, thermal efficiency, and surge robustness are paramount.

FAQ

What is the recommended clamping force for D1800N44TVFXPSA1 installation?

The datasheet specifies a clamping force range of 24–60 kN for reliable electrical contact and optimal thermal transfer. Use calibrated torque tools and follow Infineon's mounting procedure to avoid pellet fracture or uneven current distribution. Exceeding 60 kN risks mechanical damage to the silicon die or housing, while forces below 24 kN increase contact resistance and localized heating.

Can D1800N44TVFXPSA1 be paralleled with other diodes for higher current capacity?

Yes - its low slope resistance (0.253 mΩ) and matched on-state characteristics enable effective current sharing when paralleled. However, strict mechanical symmetry (identical heatsink flatness, clamping force, and thermal interface material) is required. External balancing inductors are not needed if layout parasitics are minimized and devices are from the same manufacturing lot.

Does this diode have a specified reverse recovery time (t_rr) or Q_r?

No - as a standard (non-fast) rectifier diode, D1800N44TVFXPSA1 does not specify t_rr. Its recovered charge Q_r is characterized at 3200 A peak forward current and varying di/dt (100–100,000 A/µs), ranging from ~100 µAs to >100,000 µAs. This behavior is typical for line-frequency rectifiers where soft recovery is not required.

What is the creepage distance and why is it important for this device?

The creepage distance is 25 mm, measured along the insulating surface between anode and cathode terminals. This value ensures safe isolation under high-humidity or contaminated environments in industrial enclosures, preventing surface tracking at 4400 V reverse voltage. It complies with IEC 60664-1 for Pollution Degree 3 applications.