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Temperature Sensors - NTC Thermistors

Image Part Number Description / PDF Quantity Rfq
NTCG104EF104FTDSX

NTCG104EF104FTDSX

TDK Corporation

THERM NTC 100KOHM 4250K 0402

15965
NTCG104BH332JT1

NTCG104BH332JT1

TDK Corporation

CASE EIA 0402 B= 3% ,3300Ω 5%

0
NTCG164LH333JT1

NTCG164LH333JT1

TDK Corporation

THERMISTOR NTC 33KOHM 4485K 0603

2360
NTCG104BF683FT1X

NTCG104BF683FT1X

TDK Corporation

THERMISTOR NTC 68KOHM 4085K 0402

6780
NTCG164LH104HT1

NTCG164LH104HT1

TDK Corporation

THERM NTC 100KOHM 4485K 0603

1791
NTCG164LH223JT1

NTCG164LH223JT1

TDK Corporation

THERMISTOR NTC 22KOHM 4485K 0603

1604
NTCG164QH334JT1

NTCG164QH334JT1

TDK Corporation

THERM NTC 330KOHM 4661K 0603

1525
NTCDS3HG103HC4NB

NTCDS3HG103HC4NB

TDK Corporation

NTC AXIAL LEAD, 4X2.0, 10K/3%, 3

168
NTCDS4AG503HC4NB

NTCDS4AG503HC4NB

TDK Corporation

NTC AXIAL LEAD, 4X2.0, 50K/3%, 4

200
NTCG163JF103FT1S

NTCG163JF103FT1S

TDK Corporation

THERMISTOR NTC 10KOHM 3435K 0603

0
NTCG104LH154JT1

NTCG104LH154JT1

TDK Corporation

THERM NTC 150KOHM 4485K 0402

0
NTCG103JF103JT1

NTCG103JF103JT1

TDK Corporation

THERMISTOR NTC 10KOHM 3380K 0402

4600
NTCDS4AG493HC4NB

NTCDS4AG493HC4NB

TDK Corporation

NTC AXIAL LEAD, 4X2.0, 49.2K/3%,

200
NTCG104BH103JT1

NTCG104BH103JT1

TDK Corporation

THERMISTOR NTC 10KOHM 4067K 0402

10000
NTCG164LH154HT1

NTCG164LH154HT1

TDK Corporation

THERM NTC 150KOHM 4885K 0603

0
NTCG164QF474JT1S

NTCG164QF474JT1S

TDK Corporation

NTC,470K,5%,0603,AEC-Q200,150

0
NTCG164BH222HT1

NTCG164BH222HT1

TDK Corporation

THERM NTC 2.2KOHM 4096K 0603

0
NTCDP4AG103JCDBBA

NTCDP4AG103JCDBBA

TDK Corporation

NTC ASSEMBLY, EPOXY CASE, 10K/5%

998
NTCG164BH222JTDS

NTCG164BH222JTDS

TDK Corporation

THERM NTC 2.2KOHM 4096K 0603

2331
NTCGP3JH103HCZCCA

NTCGP3JH103HCZCCA

TDK Corporation

NTC ASSEMBLY, LUG TERMINAL, 10K/

795

Temperature Sensors - NTC Thermistors

1. Overview

NTC (Negative Temperature Coefficient) thermistors are temperature-sensitive resistors whose resistance decreases with increasing temperature. This semiconductor ceramic device utilizes metal oxide materials to achieve precise temperature measurement and control. As a fundamental component in thermal management systems, NTC thermistors play critical roles in modern electronics, automotive engineering, and industrial automation due to their high sensitivity ( : 2000-5000 K) and accuracy ( 0.1 C to 5 C).

2. Major Types and Functional Classification

TypeFunctional CharacteristicsApplication Examples
Bead ThermistorsSmall size ( 0.5-5mm), fast response (<50ms), glass-encapsulatedMedical probes, liquid temperature monitoring
Disk ThermistorsHigher power rating, epoxy-coated, axial leadsPower supply thermal protection, HVAC systems
Chip ThermistorsSMD packaging, low profile (0.6-3.2mm), RoHS compliantSmartphone thermal management, wearable devices
Glass-EncapsulatedHermetic seal, corrosion resistance, operating temp: -50 C to +300 CAutomotive battery monitoring, aerospace sensors

3. Structure and Composition

Typical NTC thermistor construction includes:

  • Semiconductive ceramic core (Mn-Ni-Co-Ox system)
  • Platinum alloy electrode layers (sintered or plated)
  • Protective epoxy/glass encapsulation (IP67 rated)
  • Lead wires (Cu/Ni alloy, 26-34 AWG)

Manufacturing process involves powder synthesis at 1500 C, isostatic pressing, and controlled atmosphere sintering to achieve desired R-T characteristics.

4. Key Technical Specifications

ParameterDescriptionSignificance
Rated Resistance (R25)Resistance at 25 C (100 -10M range)System compatibility, signal conditioning design
B-Value (K)Material constant (2000-5000K)Determines sensitivity across operating range
ToleranceResistance deviation ( 1% to 15%)Affects measurement accuracy
Operating Temp Range-100 C to +600 C (varies by type)Environmental suitability
Dissipation FactormW/ C (self-heating coefficient)Power consumption and stability considerations

5. Application Fields

Primary industries utilizing NTC thermistors:

  • Industrial: Process control ( 0.5 C accuracy), motor protection
  • Consumer Electronics: Battery management (Li-ion charging), smart thermostats
  • Medical: Patient monitoring (Class F accuracy), lab equipment
  • Automotive: Battery pack thermal monitoring (ISO 14001 compliance), ECU protection

Notable application example: Tesla Model S battery management system uses 48-channel NTC array for cell temperature monitoring ( 1 C accuracy).

6. Leading Manufacturers and Products

ManufacturerKey ProductsTechnical Highlights
Murata ElectronicsNXFT SeriesAutomotive-grade (AEC-Q200), 0.5 C accuracy, -50 C to +150 C range
TE ConnectivityNTCLE SeriesMedical certification (IEC 60601), 3.2mm chip format
Vishay BeyschlagNTCAl SeriesAluminum housing, 50W power handling, IP68 rating

7. Selection Guidelines

Key considerations for NTC thermistor selection:

  1. Resistance-Temperature curve matching application requirements
  2. Environmental factors: humidity (IP rating), vibration (automotive shock specs)
  3. Electrical parameters: operating current (self-heating effects)
  4. Form factor constraints (SMD vs through-hole)
  5. Calibration requirements (standard vs customized R-T tables)

Recommend verifying long-term stability (aging rate <0.2%/year) and RoHS compliance for production applications.

8. Industry Trends

Emerging developments include:

  • Micro-NTC fabrication (MEMS-based, <0.1mm chips)
  • High-temperature stability improvements (up to 600 C operation)
  • Integration with wireless sensor networks (Zigbee/LoRa compatibility)
  • AI-enhanced linearization algorithms (reducing external circuit complexity)

Market growth projected at 8.2% CAGR through 2027 driven by EV battery management demands.

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