Infineon Technologies DD171N18KHPSA1

Overview

DD171N18KHPSA1 from Semikron is a press-pack dual-diode rectifier module rated for 171 A average on-state current (IFAVM), 1800 V repetitive peak reverse voltage (VRRM), and 6600 A non-repetitive surge current (IFSM) at 10 ms, with 0.126 °C/W maximum junction-to-case thermal resistance per arm under DC conditions. It is designed for high-power industrial AC/DC conversion in six-pulse bridge configurations in traction converters and medium-voltage UPS systems.

For engineers reviewing the DD171N18KHPSA1 datasheet, DD171N18KHPSA1 pinout, DD171N18KHPSA1 application, or DD171N18KHPSA1 equivalent, key selection criteria include verified VRRM rating, IFAVM derating vs. case temperature, transient thermal impedance ZthJC analytical model, and pressure-contact Si pellet construction requiring precise M1 mounting torque of 6 Nm ±15%.

Technical Context

This dual-arm rectifier module uses silicon die with AlN internal insulation and pressure-contact metallization, enabling high-current conduction without wire bonds. Its thermal design supports both natural and forced-air cooling via heatsink KM17, with transient thermal impedance modeled using seven R-τ network elements for accurate loss simulation in pulsed-load applications.

The device operates across -40°C to +150°C case temperature range and features low on-state voltage (VF max = 1.26 V at 500 A, Tvj = 150°C) and minimal slope resistance (rT = 0.8 mΩ), ensuring efficient power handling in high-duty-cycle rectification circuits with strict thermal management requirements.

Key Specifications

Pinout & Package

DD171N18KHPSA1 is housed in a press-pack module with two isolated diode arms sharing a common cathode configuration. The package uses Si pellets with AlN internal insulation and requires M1 mechanical mounting (6 Nm ±15%) and M2 electrical terminal torque (6 Nm ±10%). Creepage distance is 15 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SKD 171/18 and DD171N16KHP, DD171N18KHPSA1 delivers superior surge immunity and tighter thermal resistance per arm-critical for rail and renewable energy applications where transient overloads and space-constrained cooling dominate design constraints.

Availability

DD171N18KHPSA1 is available at Aetrix Electronics and suitable for rail traction converters, industrial UPS systems, medium-voltage drives, and renewable energy inverters requiring stable component supply across long production lifecycles and demanding thermal environments.

Supply support for DD171N18KHPSA1 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

Semikron is a German power semiconductor manufacturer specializing in high-reliability modules for industrial, traction, and renewable energy applications since 1951.

This part belongs to Semikron's IFBIP (Industrial Full-Bridge Isolated Power) rectifier module family, engineered for high-current, high-voltage AC/DC conversion in mission-critical infrastructure where thermal stability and mechanical ruggedness are non-negotiable.

FAQ

What is the mounting torque specification for DD171N18KHPSA1?

The mechanical mounting torque (M1) is 6 Nm with ±15% tolerance, applied to the module's baseplate screws to ensure optimal thermal contact with the heatsink. Electrical terminal torque (M2) is also 6 Nm ±10%. Exceeding these values risks damaging the pressure-contact die or deforming the housing, compromising thermal performance and long-term reliability.

Does DD171N18KHPSA1 have reverse recovery specifications?

No reverse recovery time (trr) or recovered charge (Qr) is specified in the official datasheet. This confirms it is a standard recovery rectifier-not optimized for high-frequency switching. It is intended for line-frequency (50/60 Hz) or low-frequency (<400 Hz) applications such as traction converters and industrial UPS, where soft recovery is unnecessary.

Can DD171N18KHPSA1 be used in parallel configurations?

Yes, but only with active current balancing-such as series inductors or matched dynamic impedance-and strict thermal symmetry. The module's dual-arm structure supports independent arm paralleling, yet inherent parameter spread (VF, rT) requires external balancing to prevent current hogging and thermal runaway under sustained load.

What is the insulation test voltage rating?

The insulation test voltage is 2.5 kV RMS at 50 Hz for 1 minute between terminals and case, confirming compliance with IEC 60747-2 for industrial isolation. This rating applies under standard test conditions and validates safe operation in grounded systems with ≤1.2 kV AC line voltage and appropriate creepage/clearance layout.