Temperature Sensors - NTC Thermistors

Part Number	Description / PDF	Quantity
NTCS0603E3333JHT Vishay BC Components/Beyshlag/Draloric	THERMISTOR NTC 33KOHM 3860K 0603	37915
B57164K0689K000 TDK EPCOS	THERMISTOR NTC 6.8OHM 2900K DISC	0
B57881S0123J000 TDK EPCOS	THERMISTOR NTC 12KOHM 3760K DISC	0
NTCLE100E3478JT1A Vishay BC Components/Beyshlag/Draloric	NTC CU 0.6 LD CODED 4R7 5% 1E	0
KX222J2 Wickmann / Littelfuse	THERM NTC 2.252KOHM 3892K BEAD	0
NB20K00103JBA Elco (AVX)	THERMISTOR NTC 10KOHM 3630K 1206	1513
CTTS-203856-S02 Thermometrics (Amphenol Advanced Sensors)	FLEX LOW PROFILE NTC TEMP SENSOR	897
NTCLE100E3222JB0A Vishay BC Components/Beyshlag/Draloric	NTC CU 0.6 LD CODED 2K2 5%	0
NTCG204AH683JT1 TDK Corporation	THERMISTOR NTC 68KOHM 3931K 0805	1959
NTCLG100E2104JB Vishay BC Components/Beyshlag/Draloric	THERM NTC 100KOHM 3997K DO35	4420
NTCALUG91A103GA Vishay BC Components/Beyshlag/Draloric	NTC LUG M4 10K 2% G24 38MM A	539
NTCG104KF104HT1 TDK Corporation	THERM NTC 100KOHM 4498K 0402	4855
ERT-J0EV224H Panasonic	MULTILAYER NTC CHIP THERMISTOR	13295
B57550G1203H000 TDK EPCOS	THERMISTOR NTC 20KOHM 3992K BEAD	0
TT4-10KC8-T125-M5-500 TEWA Sensors LLC	NTC 10K OHM 1%, B 3435, M5 RI	127
CMFB3435103FNT Cantherm	THERMISTOR NTC 10KOHM 3435K 0805	43182
CMFA3550103JNT Cantherm	THERMISTOR NTC 10KOHM 3500K 0603	0
NTCLE100E3478GT2A Vishay BC Components/Beyshlag/Draloric	NTC CU 0.6 LD CODED 4R7 2% 2E	0
RL1005-22.1K-122-D1 Thermometrics (Amphenol Advanced Sensors)	THERMISTOR NTC 40KOHM 4365K DISC	0
02M1801FF Vishay BC Components/Beyshlag/Draloric	NTC THERMISTORS	0

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.