NK123C5R2
NTC THERMISTOR, 12K, RADIAL LEADED
- Manufacturer: AMPHENOL ADVANCED SENSORS
- Product type:
- Zero; NTC THERMISTOR, 12K, RADIAL LEADED; Zero Power Resistance at 25°C:12kohm; Product Range:NK Series; Thermistor Mounting:Through Hole; Beta Value (K):3740K; Thermistor Case Style:-
- SVHC: No SVHC (07-Jul-2017)
- B-Constant: 3740K
- Product Range: NK Series
- Resistance (25°C): 12kohm
- Thermistor Mounting: Through Hole
- Thermistor Terminals: Radial Leaded
- Thermistor Case Style: -
- Operating Temperature Max: 155°C
- Operating Temperature Min: -40°C
- Automotive Qualification Standard: -
| Delivery and price | |
|---|---|
| Units per pack | 500 |
| Price | 0.503 € |
| Current stock | 1000+ |
| Lead time | 30 days |
NTC Type NK Thermometrics Epoxy-Coated Chip Thermistor ## **Description** ## **Features** A range of NTC chip thermistors with tin coated steel wires and epoxy resin coating. - Designed for accurate temperature measurement, control and compensation - Tight tolerances on resistance and B value - Operation up to 311°F (155°C) with excellent stability - Small body diameter - Fast response - Suitable for automotive, HVAC and white goods applications - Available on bandolier to IEC 286-2 - RoHS compliant **Amphenol Advanced Sensors** ## Type NK Specifications Chip thermistor with solder-coated wires ## **Ordering Information** **Replace * in the codes shown above as follows:** - Loose-packed: R - Bandoliered: B **==> picture [257 x 157] intentionally omitted <==** **----- Start of picture text -----**<br> 0.27 in (7 mm)<br>0.0975 in (2.5 mm) nom max<br>3 mm<br>max<br>0.195 in (5 mm)<br>max<br>Ø 0.0195 in (0.5 mm)<br>3 mm<br>max<br>1.56 in (40 mm) min<br>NTC Type NK Dimensions<br>**----- End of picture text -----**<br> ## **Data** ## **Options** Other resistance values within the ranges shown; - e.g. code NK701C2*2 for 700 W ± 2% at 77°F (25°C) - Reference temperatures other than 77°F (25°C) - Wire lengths 0.47 in to 1.57 in (12 mm to 40 mm) (±1 mm) - Minimum operating temperature: -40°F (-40°C) - Maximum operating temperature: See table - Thermal time constant: 15s (cooling), 2.45 (ambient change) - Dissipation factor: 2.2 mW/K - Mass: 0.00040 lbs (0.18 g) - Packing/MOQ: 5,000/box (loose) - 10,000/reel (bandoliered) **==> picture [488 x 43] intentionally omitted <==** **----- Start of picture text -----**<br> R25 Material B Value Maximum Code Code Code Code Code<br>W System 25/85°C Operating R25°C ± 1% R25°C ± 2% R25°C ± 3% R25°C ± 5% R25°C ± 10%<br>K Temperature<br>°F (°C)<br>**----- End of picture text -----**<br> |500|2|3540|±|1%|257|(125)||NK501C2*2|NK501C2*3|NK501C2*5|NK501C*R10| |---|---|---|---|---|---|---|---|---|---|---|---| |500|2A|3627|±|1%|257|(125)||NK501C2A*2|NK501C2A*3|NK501C2A*5|NK501C2A*10| |1000|2|3540|±|1%|257|(125)||NK102C2*2|NK102C2*3|NK102C2*5|NK102C2*10| |1000|2A|3627|±|1%|257|(125)||NK102C2A*2|NK102C2A*3|NK102C2A*5|NK102C2A*10| |2000|2|3540|±|1%|257|(125)||NK202C2*2|NK202C2*3|NK202C2*5|NK202C2*10| |2000|2A|3627|±|1%|257|(125)||NK202C2A*2|NK202C2A*3|NK202C2A*5|NK202C2A*10| |2200|1|3977|±|0.75%|311|(155)|NK222C1*1|NK222C1*2|NK222C1*3|NK222C1*5|NK222C1*10| |2700|1|3977|±|0.75%|311|(155)|NK272C1*1|NK272C1*2|NK272C1*3|NK272C1*5|NK272C1*10| |5000|1|3977|±|0.75%|311|(155)|NK502C1*1|NK502C1*2|NK502C1*3|NK502C1*5|NK502C1*10| |5000|4A|3436|±|1%|311|(155)|NK502C4A*1|NK502C4A*2|NK502C4A*3|NK502C4A*5|NK502C4A*10| |10000|1|3977|±|0.75%|311|(155)|NK103C1*1|NK103C1*2|NK103C1*3|NK103C1*5|NK103C1*10| |10000|4A|3436|±|1%|311|(155)|NK103C4A*1|NK103C4A*2|NK103C4A*3|NK103C4A*5|NK103C4A*10| |10000|5|3740|±|1%|311|(155)|NK103C5*1|NK103C5*2|NK103C5*3|NK103C5*5|NK103C5*10| |12000|5|3740|±|1%|311|(155)|NK123C5*1|NK123C5*2|NK123C5*3|NK123C5*5|NK123C5*10| |30000|8|3977|±|1%|311|(155)|NK303C8*1|NK303C8*2|NK303C8*3|NK303C8*5|NK303C8*10| |50000|8|3977|±|1%|311|(155)|NK503C8*1|NK503C8*2|NK503C8*3|NK503C8*5|NK503C8*10| _See separate tables for resistance - temperature data._ ## **Amphenol Advanced Sensors** www.amphenol-sensors.com © 2018 Amphenol Corporation. All Rights Reserved. Specifications are subject to change without notice. Other company names and product names used in this document are the registered trademarks or trademarks of their respective owners. **AAS-920-573D 02/2018**
Updated at June 8, 2026
Amphenol Advanced Sensors is a leading innovator in sensor technologies and measurement solutions, serving the highly regulated and demanding needs of the transportation, medical, and industrial markets. Through its renowned legacy brands—including Thermometrics for temperature sensing, NovaSensor for pressure, and Telaire for air quality—the company delivers a diverse portfolio of critical components designed to provide accurate environmental data for real-time decision-making. The core of this manufacturer's offering focuses heavily on highly reliable circuit protection and transducer components. Engineers will find an extensive selection of temperature sensing and compensation NTC thermistors, alongside a comprehensive range of high-performance pressure sensors and transducers. These precision-engineered devices are essential for ensuring thermal stability, accurate fluid measurement, and reliable operational feedback in complex commercial and industrial applications. Beyond these primary lines, the selection includes vital power management devices such as inrush current limiting (ICL) NTC thermistors and PTC thermistors engineered to safeguard sensitive electronics. The portfolio is further complemented by specialized temperature sensors, light sensors, and dataloggers, providing a robust, integrated suite of measurement and protection solutions for modern hardware design.
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