The IXYS MDD44-18N1B is a high-voltage diode module engineered for reliable rectification and freewheeling duty in industrial and traction-grade power electronics. Rated at 1800V, this module is built to handle the voltage stresses common in medium-voltage drive systems, converters, and uninterruptible power supplies. IXYS diode modules in the MDD series are well regarded for their low forward voltage drop, rugged construction, and thermal performance, making the MDD44-18N1B a dependable choice wherever circuit designers require proven, long-life rectification in a compact package.

The MDD44-18N1B sees broad use across industrial motor drives, regenerative braking circuits, traction inverters, welding equipment, induction heating systems, and three-phase bridge rectifiers. Its high blocking voltage rating makes it particularly well suited for applications tied to medium-voltage AC inputs or systems with significant inductive voltage spikes. Power supply designers and OEM equipment manufacturers also specify this module in UPS platforms, battery chargers, and energy recovery systems where continuous rectifier duty demands a component with consistent thermal and electrical characteristics across extended operating life.

Quick Reference: MDD44-18N1B

Key Features of the MDD44-18N1B:

• 1800V repetitive peak reverse voltage (VRRM) for high-voltage rectification and freewheeling circuits
• IXYS MDD-series isolated baseplate construction for simplified thermal management and heatsink mounting
• Low forward voltage drop (VF) minimizes conduction losses and reduces thermal load in continuous-duty applications
• Optimized for both rectifier bridge and freewheeling diode positions in three-phase converter topologies
• Industry-standard module footprint supports direct replacement in existing drive and converter designs
• Designed to meet the rigorous electrical and mechanical demands of traction, industrial drive, and power supply environments

With a factory lead time of 30 weeks on new production, the MDD44-18N1B presents a serious procurement challenge for maintenance teams facing unplanned downtime or project engineers building to schedule. Long lead times on IXYS diode modules are common across distribution channels, and obsolescence risk adds further pressure for facilities maintaining aging drive or converter platforms. ATI Accurate Technology maintains inventory of hard-to-find and long-lead-time IXYS modules specifically to bridge this gap — keeping your production line moving without waiting on factory queues or backorder delays.

ATI Accurate Technology is a power semiconductor distributor located in Palmetto, Florida, stocking IGBTs, diodes, thyristors, and rectifier modules including obsolete and long-lead-time parts. The MDD44-18N1B ships same-day on orders placed before 5PM EST. Volume pricing is available for MRO and OEM procurement. Contact our team today: 239-734-7566 | sales@igbts.us | igbts.us