Temperature Sensors - NTC Thermistors

Part Number	Description / PDF	Quantity
TTS-2KC3-BZ TEWA Sensors LLC	THERMISTOR NTC 2KOHM 3977K BEAD	600
GS503J1K Wickmann / Littelfuse	THERMISTOR NTC 50KOHM 3977K BEAD	0
USUR1000-103G-06 Wickmann / Littelfuse	THERM NTC 10KOHM 3892K RING LUG	30
USP7765 Wickmann / Littelfuse	THERM NTC 10KOHM 3892K RING LUG	0
NXRT15WB473FA1B010 TOKO / Murata	LEADED NTC THERMISTOR	0
MF52A1473H3950 Cantherm	THERMISTOR NTC 47KOHM 3950K BEAD	0
B57256V5473H360 TDK EPCOS	THERMISTOR NTC 47KOHM 4050K 0402	0
ERT-J1VR682J Panasonic	THERM NTC 6.8KOHM 4250K 0603	2239
B57871S0103F001 TDK EPCOS	THERMISTOR NTC 10KOHM 3988K BEAD	21555
NTCLE100E3333HT1A Vishay BC Components/Beyshlag/Draloric	NTC CU 0.6 LD CODED 33K 3% 1E	0
NCP15XQ471E03RC TOKO / Murata	THERMISTOR NTC 470OHM 3650K 0402	0
USUR1000-203H-06 Wickmann / Littelfuse	THERM NTC 20KOHM 3892K RING LUG	0
MC65F103B Thermometrics (Amphenol Advanced Sensors)	THERMISTOR NTC 10KOHM 3969K BEAD	7007
B57164K0334J000 TDK EPCOS	THERM NTC 330KOHM 5000K DISC	0
504RG1K Wickmann / Littelfuse	THERM NTC 500KOHM 4140K DO35	591
02C1001JF Vishay / Dale	THERMISTOR NTC 1KOHM BEAD	0
NTCDS4AG303HC3NB TDK Corporation	NTC AXIAL LEAD, 3X1.8, 30K/3%, 4	198
JI-103C1R2-L102 Thermometrics (Amphenol Advanced Sensors)	THERM NTC 10KOHM 3977K PROBE	97
USUR1000-222H-06 Wickmann / Littelfuse	THERM NTC 2.252KOHM 3892K LUG	0
NTCASCWE3104F Vishay BC Components/Beyshlag/Draloric	THERM NTC 100KOHM 4190K PROBE	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.