The Infineon TT18N14LOF is a thyristor module configured for phase control and switching applications requiring robust voltage blocking up to 1400V and continuous current handling of 18A. Housed in Infineon's compact LOF package, this module integrates thyristor elements with an isolated baseplate for simplified heatsink mounting and improved thermal management. Its stable gate trigger characteristics and low on-state voltage drop make it a dependable choice for engineers who need consistent performance across a wide operating temperature range in high-voltage AC circuits.

The TT18N14LOF is well suited for industrial power conversion systems where controlled AC switching is critical. Typical applications include soft starters, AC motor drive front ends, resistance welding controllers, heating and temperature regulation systems, and UPS input stage controls. Its 1400V voltage class provides adequate margin for 690V AC line applications, and the isolated baseplate design simplifies integration into standard power module assemblies used in machine tools, process automation equipment, and industrial drives across manufacturing, energy, and infrastructure sectors.

Quick Reference: TT18N14LOF

Key Features of the TT18N14LOF:

• 1400V repetitive peak off-state voltage (VDRM/VRRM) suitable for 690V AC line environments with full safety margin
• 18A average on-state current (IT(AV)) supporting continuous duty phase control loads
• Isolated copper baseplate for direct heatsink mounting and low thermal resistance junction-to-case
• Low gate trigger current and voltage for compatibility with standard thyristor firing circuits and DSP-based gate drive boards
• High dV/dt and dI/dt ratings reduce susceptibility to spurious triggering in electrically noisy industrial environments
• LOF package format with industry-standard footprint for drop-in replacement across compatible Infineon and equivalent competitor assemblies

With a current factory lead time of 99 weeks on new production, the TT18N14LOF presents a serious procurement challenge for maintenance teams managing unplanned downtime or production engineers building new systems on deadline. This part is also approaching end-of-life status in some distribution channels, making spot inventory increasingly scarce. ATI Accurate Technology maintains stock of hard-to-find and long-lead-time thyristor modules precisely for situations like this — providing a direct path to new OEM parts without the multi-year wait or the risk of counterfeit product from unvetted secondary market sources.

ATI Accurate Technology is based in Palmetto, Florida and specializes in power semiconductors including IGBTs, thyristors, diodes, and rectifier modules. Orders placed before 5PM EST ship same day. Whether you need a single replacement module or volume quantities for a production run or MRO stocking program, ATI offers competitive pricing and reliable availability. Contact our team directly at 239-734-7566 or sales@igbts.us for quotes, volume pricing, and lead time confirmation.