NTC thermistor SMD NTC

surface-mountSMDfor ambient temperature measurement

Introduction
NTC (Negative Temperature Coefficient) thermistors are thermally sensitive resistors whose resistance decreases with increasing temperature. With sensitivity typically between 2% and 6% per K and excellent long-term stability, SMD NTC thermistors provide accurate temperature measurement and compensation for automotive, commercial and industrial electronics.

Features & Benefits (summary)

• Automotive series (B57*V5/…): Tight tolerances (R25 ±0.5%, B ±0.5%); AEC‑Q200 qualification with extended stress level; operating temperature up to +150 … +175 °C; case sizes EIA 0402 … 1206; UL compliance (E69802) on selected parts; short response time; RoHS / Pb‑free.
• Standard series (B57*V2/…): Wide resistance range (1 … 470 kΩ depending on case); accurate sensing to +125 °C; tight tolerances available; RoHS / Pb‑free.

High temperature series (overview)

• Accurate temperature measurement from −40 °C to +175 °C.
• B values specified between 25 °C and 100 °C for highest accuracy at typical working temperatures.
• Minimized resistance drift after soldering.
• 100% lead‑free and RoHS compliant.

Soft termination series (overview)

• Soft termination and resin layers improve resistance to mechanical stress, board bending and thermal shocks.
• Enhanced mechanical robustness for special substrate combinations and for applications with frequent thermal/mechanical stress.
• Accurate temperature measurement from −40 °C to +150 °C.
• Tight R and B tolerances available for precision sensing.

Typical applications

• Automotive: battery management systems (BMS), ADAS / ECUs, DC/DC converters, inverters, on‑board chargers, thermal protection for semiconductors (GaN/SiC), LED lighting.
• Industry: industrial automation, HVAC, thermostats, smart metering, lighting, energy storage systems (ESS), security and building automation.
• Consumer: household appliances, healthcare devices, temperature sensing in consumer electronics.
• Power modules: temperature sensing and protection in power modules and WBG (SiC/GaN) semiconductor assemblies.
• ICT / AI: smartphones, wearables, displays, AI servers and data center power supplies requiring accurate thermal monitoring.

Datasheets & tools (overview)
Datasheets are provided for Automotive, Soft Termination and Standard series, including R/T characteristics, application notes and selection guides. Online tools include R/T calculators, PSpice models and SIM CAL Studio for circuit simulation.

Technical specifications

• Operating temperature ranges: typical series up to +125 °C; high temperature series up to +175 °C.
• Resistance temperature behavior: NTC – resistance decreases with increasing temperature; sensitivity ~2%–6% per K (typ.).
• R@25 °C examples: common values from 1 kΩ up to 470 kΩ depending on series and case size.
• B values: available B25/50, B25/85 and B25/100 (examples: 3375 K, 3380 K, 3420 K, 3455 K).
• Tolerances: R tolerances down to ±0.5%; B tolerances available down to ±0.5%.
• Case sizes: EIA 0402 (1005), 0603 (1608), 0805 (2012), 1206 (3216) among others.
• Qualification: Automotive series qualified to AEC‑Q200 where indicated.
• Compliance: RoHS compliant, 100% Pb‑free; UL compliance on selected series (E69802).
• Special terminations: soft termination options for improved mechanical robustness; versions optimized for power modules available.
• Typical applications: BMS, ECUs, power modules, LED thermal management, HVAC, industrial sensors, consumer appliances.