Temperature Sensors - NTC Thermistors

Part Number	Description / PDF	Quantity
NCP15XW152E03RC TOKO / Murata	THERM NTC 1.5KOHM 3950K 0402	0
ERT-J1VR103J Panasonic	THERMISTOR NTC 10KOHM 4250K 0603	19428
NTCG063JF103FTB TDK Corporation	THERMISTOR NTC 10KOHM 3380K 0201	11041
B57504K0103A009 TDK EPCOS	THERMISTOR NTC 10KOHM PROBE	191
NXRT15XH103FA1B030 TOKO / Murata	THERMISTOR NTC 10KOHM 3380K BEAD	0
USP12755 Wickmann / Littelfuse	THERM NTC 10KOHM 3435K PROBE	0
NTCLE203E3223GB0A Vishay BC Components/Beyshlag/Draloric	NTC NI 0.4 LEAD 22K 2%	0
NTCLE100E3688JB0 Vishay BC Components/Beyshlag/Draloric	THERMISTOR NTC 6.8OHM 2880K BEAD	929
B57321V2222H060 TDK EPCOS	THERM NTC 2.2KOHM 3940K 0603	0
NTHS0603N17N1503JE Vishay / Dale	THERM NTC 150KOHM 4064K 0603	4710
RL2006-119-85-D1 Thermometrics (Amphenol Advanced Sensors)	THERMISTOR NTC 200OHM 3772K DISC	0
203JG1K Wickmann / Littelfuse	THERMISTOR NTC 20KOHM 3892K DO35	198
B57374V2104H060 TDK EPCOS	THERM NTC 100KOHM 4386K 0603	0
GR302J1K Wickmann / Littelfuse	THERMISTOR NTC 3KOHM 3977K BEAD	0
NXFT15XV103FA2B140 TOKO / Murata	THERMISTOR NTC 10KOHM 3936K BEAD	0
202FG1J Wickmann / Littelfuse	THERMISTOR NTC 2KOHM 3419K DO35	898
135-104LAC-J01 Honeywell Sensing and Productivity Solutions	THERM NTC 100KOHM 3887K DO35	219
104JG1H Wickmann / Littelfuse	THERMISTOR NTC 10KOHM 3892K DO35	298
NTHS0603N02N1002KE Vishay / Dale	THERMISTOR NTC 10KOHM 3500K 0603	29
NTCS0805E3684JXT Vishay BC Components/Beyshlag/Draloric	THERM NTC 680KOHM 4125K 0805	15081

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.