Temperature Sensors - NTC Thermistors

Part Number	Description / PDF	Quantity
CMFB3970103JNT Cantherm	THERMISTOR NTC 10KOHM 3970K 0805	3349
PX602J2 Wickmann / Littelfuse	THERMISTOR NTC 6KOHM 3892K BEAD	0
NCP15XH103E03RC TOKO / Murata	THERMISTOR NTC 10KOHM 3380K 0402	5823
NHQM154B425T10 Thermometrics (Amphenol Advanced Sensors)	THERM NTC 150KOHM 4250K 0805	0
DC95H303W Thermometrics (Amphenol Advanced Sensors)	THERMISTOR NTC 30KOHM 3936K BEAD	700
B57356V5473J160 TDK EPCOS	THERMISTOR NTC 47KOHM 4050K 0603	0
NTCLE100E3154GT2A Vishay BC Components/Beyshlag/Draloric	NTC CU 0.6 LD CODED 150K 2% 2E	0
NTCLE100E3474HB0 Vishay BC Components/Beyshlag/Draloric	THERM NTC 470KOHM 4570K BEAD	0
B57500M0103A005 TDK EPCOS	THERM NTC 10KOHM 3988K PROBE	847
NXRT15WF104FA5B045 TOKO / Murata	THERM NTC 100KOHM 4250K BEAD	0
NXRT15XV502FA1B020 TOKO / Murata	THERMISTOR NTC 5KOHM 3936K BEAD	0
252FG1J Wickmann / Littelfuse	THERM NTC 2.5KOHM 3419K DO35	201
ERT-J0EA400H Panasonic	MULTILAYER NTC CHIP THERMISTOR	9240
B57164K0101K000 TDK EPCOS	THERMISTOR NTC 100OHM 3200K DISC	2934
NTCGP3UH503HCZCCA TDK Corporation	NTC ASSEMBLY, LUG TERMINAL, 50K/	890
01M5001FF Vishay BC Components/Beyshlag/Draloric	NTC THERMISTORS	0
NTHS0603N17N1503KE Vishay / Dale	THERM NTC 150KOHM 4064K 0603	0
NTCS0603E3222JMT Vishay BC Components/Beyshlag/Draloric	THERM NTC 2.2KOHM 3520K 0603	43393
NHQM503B415T5 Thermometrics (Amphenol Advanced Sensors)	THERMISTOR NTC 50KOHM 4150K 0805	0
NHQ303B400T5 Thermometrics (Amphenol Advanced Sensors)	THERMISTOR NTC 30KOHM 4000K 1206	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.