Infineon Technologies DDB6U85N16LHOSA1

Overview

DDB6U85N16LHOSA1 from Infineon Technologies is a dual common-cathode silicon rectifier diode module in ISOPACK housing, rated for 1600 V repetitive peak reverse voltage, 85 A output current at TC = 100°C, and 650 A non-repetitive surge current (tp = 10 ms). It integrates two glass-passivated Si chips with Al₂O₃ internal insulation and is used in industrial AC/DC front-end rectification for UPS, motor drives, and welding equipment.

For engineers reviewing the DDB6U85N16LHOSA1 datasheet, DDB6U85N16LHOSA1 pinout, DDB6U85N16LHOSA1 application, or DDB6U85N16LHOSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.241 °C/W), forward voltage (1.44 V @ 100 A, Tvj max), and isolation test voltage (3.0 kV RMS, 50 Hz, 1 min).

Technical Context

This dual-diode module operates in full-wave bridge or parallel-configured rectifier arms, supporting 120° conduction angle rectification. Its glass-passivated Si pellets and Al₂O₃ ceramic base ensure stable reverse recovery and high-voltage isolation up to 1700 V non-repetitive peak reverse voltage.

The module's thermal design targets high-power industrial converters: junction-to-case resistance is specified at 0.241 °C/W (max, per module, 120° rect), and case-to-heatsink resistance is 0.033 °C/W (max), enabling reliable operation up to 150 °C junction temperature with compatible heatsinks KM 11, KM 14, KM 33.

Key Specifications

Pinout & Package

Package: ISOPACK - insulated metal-base module with integrated Al₂O₃ ceramic substrate, dual common-cathode configuration, M1 mounting screws (6 Nm), and M2 terminal screws (4 Nm). Weight: 220 g. Creepage distance: 12.5 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MDD65-16N1 and VS-GB02-16N1, DDB6U85N16LHOSA1 delivers optimal balance of conduction efficiency (1.44 V VF), thermal resistance (0.241 °C/W), and surge robustness (650 A) for 80–100 A continuous industrial rectifier designs.

Availability

DDB6U85N16LHOSA1 is available at Aetrix Electronics and suitable for uninterruptible power supplies, industrial motor drive front-ends, and resistance welding power supplies requiring stable component supply, long lifecycle support, and traceable sourcing.

Supply support for DDB6U85N16LHOSA1 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.

DDB6U85N16LHOSA1 belongs to Infineon's ISOPACK rectifier module product line, designed specifically for high-reliability, high-current AC/DC conversion in harsh industrial environments with stringent isolation and thermal demands.

FAQ

What is the maximum allowable case temperature for continuous operation?

The maximum allowable case temperature is not fixed-it depends on output current and cooling conditions. At ID = 85 A, TC must not exceed 100°C; at ID = 104 A, TC is limited to 84°C. The derating curve on page 6 of the datasheet defines exact TC vs. ID limits for DC and 120° rectified operation.

Which heatsinks are validated for use with DDB6U85N16LHOSA1?

Infineon validates KM 11, KM 14, KM 17, and KM 33 heatsinks for this module. KM 33 with 90 l/s airflow supports 104 A at TC = 35°C; KM 11 supports 58 A at TA = 45°C. Mounting torque must be 6 Nm for M1 screws and 4 Nm for M2 terminals to ensure RthCK ≤ 0.033 °C/W.

Does DDB6U85N16LHOSA1 support reverse conduction or bidirectional operation?

No-DDB6U85N16LHOSA1 is a unidirectional rectifier module with two anodes and one common cathode. It conducts only from anode to cathode. Reverse conduction requires external anti-parallel devices or a separate inverter leg; the module itself has no reverse recovery specification for active switching.

Is the baseplate electrically isolated from the terminals?

Yes-the baseplate is fully galvanically isolated from all terminals via the Al₂O₃ ceramic substrate. The 3.0 kV RMS insulation test voltage (50 Hz, 1 min) confirms reinforced isolation between terminals and baseplate, enabling safe mounting to grounded heatsinks in Class I equipment.