Vishay General Semiconductor - Diodes Division 200CNQ040

Overview

200CNQ040 from Infineon Technologies is a center-tap Schottky rectifier module optimized for high-current DC power conversion, featuring 40 V maximum DC reverse voltage, 200 A total device average forward current (100 A per leg), 0.49 V forward voltage at 100 A/125°C, and 150°C junction temperature rating. It serves as a low-loss freewheeling or output rectifier in industrial UPS systems and plating power supplies.

For engineers reviewing the 200CNQ040 datasheet, 200CNQ040 pinout, 200CNQ040 application, or 200CNQ040 equivalent, key selection criteria include thermal resistance (0.20°C/W junction-to-case per package), reverse leakage (500 mA at 125°C per leg), ruggedness via guard ring, TO-244AB mechanical outline, and center-tap configuration for dual-leg synchronous operation.

Technical Context

This device implements a common-cathode, center-tapped Schottky diode structure with two anode terminals and one shared cathode terminal, enabling half-wave or full-wave rectification without external center-tap transformers. Its proprietary barrier technology suppresses reverse leakage at elevated temperatures while maintaining low forward voltage drop across its rated current range.

Thermal design relies on direct mounting to heatsinks via the insulated baseplate (R_thCS = 0.10°C/W typical), with junction-to-case thermal resistance specified separately per leg (0.40°C/W) and per package (0.20°C/W), reflecting its dual-die construction in a single TO-244AB housing.

Key Specifications

Pinout & Package

Package: TO-244AB (Modified JEDEC), insulated metal-base module with center-tap configuration. Dimensions: 92.71 × 40.26 × 34.925 mm (L×W×H), weight 79 g. Mounting via 1/4-20 slotted hex base and center hole.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Compared with VSKT200-04 and DSSK100-04A, the 200CNQ040 delivers integrated center-tap functionality in a single TO-244AB module, reducing PCB area and interconnect inductance while offering superior thermal resistance (0.20°C/W pkg) and higher surge rating (26 kA).

Availability

200CNQ040 is available at Aetrix Electronics and suitable for industrial UPS systems, electroplating power supplies, and welding equipment requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for 200CNQ040 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.

The 200CNQ... Series was designed specifically for high-current, high-temperature rectification in industrial power conversion, emphasizing low V_F, rugged surge handling, and extended thermal operation up to 150°C.

FAQ

What is the maximum junction temperature rating for the 200CNQ040?

The 200CNQ040 has a maximum junction temperature rating of +150°C, validated across its full operating current range. This allows uninterrupted operation in high-ambient environments such as enclosed industrial cabinets or near heat-generating components. The device maintains specified electrical performance-including reverse leakage and forward voltage-up to this limit, making it suitable for thermally constrained applications where silicon rectifiers would require significant derating.

Does the 200CNQ040 have a center-tap configuration, and how is it implemented?

Yes, the 200CNQ040 implements a true center-tap configuration with two isolated anode terminals (Anode 1 and Anode 2) and one shared common cathode terminal. This structure enables full-wave rectification without an external center-tapped transformer, reducing magnetic component count and size. The internal layout ensures symmetrical current sharing between legs under balanced loading, and the TO-244AB package provides mechanical isolation between anode leads to prevent parasitic coupling.

What is the thermal resistance from junction to case for the 200CNQ040, and how does it differ per leg versus per package?

The 200CNQ040 specifies R_thJC = 0.40°C/W per leg and 0.20°C/W per package. The lower per-package value reflects the combined thermal path of both dies to the shared baseplate, enabling more accurate system-level thermal modeling when the entire module is mounted to a heatsink. Engineers must use the per-leg value when calculating individual die temperature rise under unbalanced current conditions, and the per-package value for overall module dissipation under balanced loads.

How does the 200CNQ040 handle reverse leakage at elevated temperatures?

The 200CNQ040 exhibits 500 mA maximum reverse leakage per leg at 125°C and rated V_R, enabled by proprietary barrier technology that suppresses thermally activated carrier generation. This is significantly lower than legacy Schottky modules at the same temperature, supporting reliable operation in high-temperature plating or welding environments. Leakage remains stable over time due to high-purity epoxy encapsulation and guard ring protection against edge breakdown.

Can the 200CNQ040 be used in reverse battery protection circuits?

Yes, the 200CNQ040 is suitable for reverse battery protection in 24 V or 48 V systems. With its 40 V V_R rating and 0.49 V forward voltage at 100 A/125°C, it blocks reverse polarity while minimizing conduction loss during normal operation. Its 150°C junction rating ensures survivability during sustained fault conditions, and the common-cathode configuration simplifies placement in series with the battery positive rail. Mounting torque specifications (24–35 kg-cm base) ensure secure mechanical attachment in vibration-prone vehicle or portable equipment.