Alpha NMQ Series

The NMQ ultra-precision thermosensitive resistor series from Alpha Electronics offers a highly accurate device that has a resistivity which varies linearly with temperature change in a surface-mount package. By utilising Alpha’s Bulk Metal® foil resistor technology, they are able to produce these resistors that are ideally designed for temperature detection, providing a small size and rapid response.

• Ultra-precision thermosensitive surface-mount resistor
• Stocked in a 500Ω resistance value with tolerances of ±0.5% and ±2.0%
• Available in any resistance between 5Ω and 500Ω
• Tolerance options from ±5.0% down to ±0.5% available
• Linear +6660 ±2% ppm/°C TCR characteristic (from 0 to +100°C)
• Response time of 0.6 seconds
• Maximum working voltage of 100V
• Power rating of 0.125W (at +70°C)
• Maximum rated operating temperature +70°C
• Temperature range from -25°C up to +125°C

These Alpha NMQ ultra-precision thermosensitive resistors are made of material only a few µm thick and respond rapidly to temperature changes. Strict control of foil composition maintains uniform quality without fluctuation of temperature characteristics of resistance. They are produced by the same fine photo-etching technology used in other metal foil precision resistors from Alpha.

Typical applications for the NMQ ultra-precision thermosensitive resistor series include:

• Cold junction reference for thermocouples
• Temperature compensation in load cells
• Temperature compensation device in semiconductor circuits
• Temperature sensing devices

The below table gives the full specifications for each resistor model available including the Alpha NMQ series:

* Symbols parenthesized are for part number composition