Temperature Sensors - NTC Thermistors

Part Number	Description / PDF	Quantity
NTCG104BH682HT1 TDK Corporation	THERM NTC 6.8KOHM 4067K 0402	0
NTCG164LH104JTDS TDK Corporation	THERM NTC 100KOHM 4485K 0603	440
NTCG163JH103HTDS TDK Corporation	THERMISTOR NTC 10KOHM 3380K 0603	9725
NTCG204AH683JT1 TDK Corporation	THERMISTOR NTC 68KOHM 3931K 0805	1959
NTCG104KF104HT1 TDK Corporation	THERM NTC 100KOHM 4498K 0402	4855
NTCG164BF473FT1SX TDK Corporation	NTC,47K,1%,0603,AEC-Q200,150	7950
NTCG104EF104FT1X TDK Corporation	THERM NTC 100KOHM 4308K 0402	48124
NTCDS3HG103GC3NB TDK Corporation	THERMISTOR NTC 10KOHM 3400K DO35	2367
NTCG103JF103FT1S TDK Corporation	THERMISTOR NTC 10KOHM 3380K 0402	261607
NTCDP3LG720JXHCEA TDK Corporation	NTC ASSEMBLY, OIL TEMPERATURE PP	800
NTCG164LH154JT1 TDK Corporation	THERM NTC 150KOHM 4485K 0603	8125
NTCDS4AG303HC3NB TDK Corporation	NTC AXIAL LEAD, 3X1.8, 30K/3%, 4	198
NTCG064EF683JTBX TDK Corporation	THERMISTOR NTC 68KOHM 4485K 0201	0
NTCG104LH333JT1 TDK Corporation	THERMISTOR NTC 33KOHM 4485K 0402	19380
NTCDP3SG562HXBBAA TDK Corporation	NTC ASSEMBLY, ABS RESIN CASE, 5.	997
NTCG104BF683FTDSX TDK Corporation	THERMISTOR NTC 68KOHM 4085K 0402	4433
NTCG164LH683HT1 TDK Corporation	THERMISTOR NTC 68KOHM 4885K 0603	3380
NTCG063EH300JTB TDK Corporation	THERMISTOR NTC 30OHM 3244K 0201	0
NTCDS3HG222HC4NB TDK Corporation	NTC AXIAL LEAD, 4X2.0, 2.186K/3%	195
NTCG064BF104FTBX TDK Corporation	THERM NTC 100KOHM 4050K 0201	4963

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

Type	Functional Characteristics	Application Examples
Bead Thermistors	Small size ( 0.5-5mm), fast response (<50ms), glass-encapsulated	Medical probes, liquid temperature monitoring
Disk Thermistors	Higher power rating, epoxy-coated, axial leads	Power supply thermal protection, HVAC systems
Chip Thermistors	SMD packaging, low profile (0.6-3.2mm), RoHS compliant	Smartphone thermal management, wearable devices
Glass-Encapsulated	Hermetic seal, corrosion resistance, operating temp: -50 C to +300 C	Automotive 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

Parameter	Description	Significance
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
Tolerance	Resistance deviation ( 1% to 15%)	Affects measurement accuracy
Operating Temp Range	-100 C to +600 C (varies by type)	Environmental suitability
Dissipation Factor	mW/ 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

Manufacturer	Key Products	Technical Highlights
Murata Electronics	NXFT Series	Automotive-grade (AEC-Q200), 0.5 C accuracy, -50 C to +150 C range
TE Connectivity	NTCLE Series	Medical certification (IEC 60601), 3.2mm chip format
Vishay Beyschlag	NTCAl Series	Aluminum housing, 50W power handling, IP68 rating

7. Selection Guidelines

Key considerations for NTC thermistor selection:

Resistance-Temperature curve matching application requirements
Environmental factors: humidity (IP rating), vibration (automotive shock specs)
Electrical parameters: operating current (self-heating effects)
Form factor constraints (SMD vs through-hole)
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.