Infineon Technologies DD171N08KHPSA1

Overview

DD171N08KHPSA1 from Semikron is a press-pack dual-diode rectifier module with 171 A average on-state current (IFAVM), 1200 V repetitive peak reverse voltage (VRRM), and 0.126 °C/W junction-to-case thermal resistance per arm under DC conditions. It uses silicon die with AlN internal insulation and is rated for 150 °C maximum junction temperature, designed for high-power industrial AC/DC conversion in medium-voltage motor drives.

For engineers reviewing the DD171N08KHPSA1 datasheet, DD171N08KHPSA1 pinout, DD171N08KHPSA1 application, or DD171N08KHPSA1 equivalent, key selection criteria include RMS on-state current (270 A), surge current capability (6.6 kA @ 10 ms), threshold voltage (0.75 V), slope resistance (0.8 mΩ), and forced-air heatsink compatibility (KM17/Papst 4650).

Technical Context

This dual-diode module implements a two-arm, common-cathode configuration with pressure-contact silicon pellets and aluminum nitride (AlN) isolation. Each arm supports independent conduction with identical electrical ratings and thermal impedance profiles.

It operates with 180° sinusoidal conduction angle and delivers stable performance across -40 °C to +150 °C case temperature range. Transient thermal impedance ZthJC is modeled using seven RC network elements, enabling accurate loss and temperature prediction in pulsed-load applications like six-pulse bridge rectification.

Key Specifications

Pinout & Package

DD171N08KHPSA1 is housed in a press-pack module with three terminals per arm: anode (A1, A2), cathode (K1, K2), and case (C). The package uses bolted mechanical mounting (M1: 6 Nm ±15%) and terminal connections (M2: 6 Nm ±10%), weighs 310 g, and provides 15 mm creepage distance. Internal AlN isolation ensures galvanic separation between arms.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SKD171/12 and DD171N12KHPSA1, DD171N08KHPSA1 offers optimal balance of surge robustness (6.6 kA), thermal efficiency (0.126 °C/W), and 1200 V blocking-ideal for standard industrial 690 VAC systems requiring high reliability under frequent overload.

Availability

DD171N08KHPSA1 is available at Aetrix Electronics and suitable for industrial motor drives, renewable energy inverters, railway traction systems, and medium-voltage UPS requiring stable component supply and long-term production continuity.

Supply support for DD171N08KHPSA1 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 manufacturer specializing in power semiconductor modules, offering integrated solutions for energy conversion in industrial, renewable, and transportation applications.

This part belongs to the DD171N series of press-pack rectifier modules, engineered for high-current, high-reliability AC/DC conversion in harsh environments with extended thermal and surge endurance.

FAQ

What is the recommended heatsink mounting torque for DD171N08KHPSA1?

The mechanical mounting torque for the module baseplate is specified as 6 Nm ±15% (M1 thread). This value ensures optimal thermal contact without damaging the AlN insulator or deforming the copper baseplate. Torque must be applied uniformly across all mounting points using a calibrated torque wrench and verified after thermal cycling.

Can DD171N08KHPSA1 be used in parallel configurations?

Yes, DD171N08KHPSA1 supports parallel operation when matched modules are used with symmetrical busbar layout, identical thermal interface materials, and current-sharing inductors. Its low slope resistance (0.8 mΩ) and tight V_F tolerance (±5% at 500 A) minimize static current imbalance, but dynamic sharing requires careful gate/diode timing alignment.

What is the insulation test voltage rating for this module?

The module is rated for 2.5 kV RMS insulation test voltage at 50 Hz for 1 minute between terminals and case, and 3.0 kV RMS for 1 second. These values reflect its AlN-based internal isolation system and validate suitability for reinforced insulation in 690 VAC systems per IEC 61800-5-1 and UL 61800-5-1 standards.

Does DD171N08KHPSA1 require external snubbers in B6 bridge operation?

Snubbers are recommended for B6 bridge use due to the module's lack of built-in soft recovery characteristics. With dV/dt ratings not specified in the datasheet and typical reverse recovery charge Q_r of ~1200 µC at 500 A, RC snubbers (e.g., 100 Ω + 1 nF per arm) reduce voltage overshoot during commutation and prevent false triggering of adjacent thyristors or IGBTs.