Temperature Sensors - NTC Thermistors

Part Number	Description / PDF	Quantity
NTCG164BH103HT1 TDK Corporation	THERMISTOR NTC 10KOHM 4067K 0603	10489
NTCG203NH103JT1 TDK Corporation	THERMISTOR NTC 10KOHM 3590K 0805	482
NTCDS3HG103HC3NB TDK Corporation	NTC AXIAL LEAD, 3X1.8, 10K/3%, 3	151
NTCG164QH474HT1 TDK Corporation	THERM NTC 470KOHM 4661K 0603	8841
NTCG104LH223JTDS TDK Corporation	THERMISTOR NTC 22KOHM 4485K 0402	7229
NTCDS4AG493HC3NB TDK Corporation	NTC AXIAL LEAD, 3X1.8, 49.2K/3%,	200
NTCG104QH474HT1 TDK Corporation	THERM NTC 470KOHM 4661K 0402	136614
NTCG164EF104FT1X TDK Corporation	CASE EIA 0603 B= 1% ,10Ω 1%	0
NTCDS3KG492HC3NB TDK Corporation	NTC AXIAL LEAD, 3X1.8, 4.961K/3%	200
NTCG064BH103HTB TDK Corporation	THERMISTOR NTC 10KOHM 4067K 0201	1570
NTCG204AH473JTDS TDK Corporation	NTC,47K,5%,0805,AEC-Q200,125	4000
NTCG164BH332HT1 TDK Corporation	THERM NTC 3.3KOHM 4067K 0603	251
NTCG104BF473HT1X TDK Corporation	THERMISTOR NTC 47KOHM 4485K 0402	0
NTCG164QH105HT1 TDK Corporation	THERMISTOR NTC 1MOHM 4661K 0603	2260
NTCG103JF103JTDS TDK Corporation	THERMISTOR NTC 10KOHM 3380K 0402	18936
NTCG164BH682JT1 TDK Corporation	THERM NTC 6.8KOHM 4067K 0603	3799
NTCG104LH104JT1 TDK Corporation	THERM NTC 100KOHM 4485K 0402	50381
NTCG064LH104JTB TDK Corporation	CASE EIA 0201 B= 3% ,10Ω 5%	0
NTCGP3UH153HCJBAA TDK Corporation	NTC ASSEMBLY, RESIN COATED, 15K/	0
NTCG104QH105HT1 TDK Corporation	THERMISTOR NTC 1MOHM 4661K 0402	2965

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.