Temperature Sensors - NTC Thermistors

Part Number	Description / PDF	Quantity
NTCDS3KG492HC4NB TDK Corporation	NTC AXIAL LEAD, 4X2.0, 4.961K/3%	200
NTCG104BF473JT1SX TDK Corporation	NTC,47K,5%,0402,AEC-Q200,150	20000
NTCG163JH103JT1 TDK Corporation	THERMISTOR NTC 10KOHM 3380K 0603	19685
NTCG164CH473HT1 TDK Corporation	THERMISTOR NTC 47KOHM 4485K 0603	0
NTCG104LH473JTDS TDK Corporation	THERMISTOR NTC 47KOHM 4485K 0402	7630
NTCG164QH105JT1 TDK Corporation	THERMISTOR NTC 1MOHM 4661K 0603	2134
NTCG104BH472HT1 TDK Corporation	THERM NTC 4.7KOHM 4067K 0402	6955
NTCG164LH223JTDS TDK Corporation	THERMISTOR NTC 22KOHM 4485K 0603	0
NTCG064EF104HTBX TDK Corporation	THERM NTC 100KOHM 4550K 0201	12750
NTCG164QH224JT1 TDK Corporation	THERM NTC 220KOHM 4661K 0603	2528
NTCG103NH471HT1 TDK Corporation	THERMISTOR NTC 470OHM 3650K 0402	0
NTCG104BH103HT1 TDK Corporation	THERMISTOR NTC 10KOHM 4067K 0402	9830
NTCG164BH103JTDS TDK Corporation	THERMISTOR NTC 10KOHM 4067K 0603	6735
NTCDS3UG942HC3NB TDK Corporation	NTC AXIAL LEAD, 3X1.8, 9.395K/3%	190
NTCG204AH473JT1 TDK Corporation	THERMISTOR NTC 47KOHM 3931K 0805	655
NTCDA3HG103HC3NB TDK Corporation	NTC RADIAL LEAD (AXIAL U-BEND),	380
NTCG104EF104HT1SX TDK Corporation	NTC,100K,3%,0402,AEC-Q200,150	20000
NTCG163JF103FT1 TDK Corporation	THERMISTOR NTC 10KOHM 3380K 0603	177
NTCG203NH103JT1S TDK Corporation	NTC,10K,5%,0805,AEC-Q200,150	3278
NTCG204CH104JTDS TDK Corporation	NTC,100K,5%,0805,AEC-Q200,125	3449

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.