Temperature Sensors - NTC Thermistors

Part Number	Description / PDF	Quantity
B57234S0221M051 TDK EPCOS	THERMISTOR NTC 220OHM 3900K	838
ERT-J1VS104FA Panasonic	THERM NTC 100KOHM 4330K 0603	3000
NTCLE100E3104HB0 Vishay BC Components/Beyshlag/Draloric	THERM NTC 100KOHM 4190K BEAD	2000
AL03006-165.9-55-G1 Thermometrics (Amphenol Advanced Sensors)	THERMISTOR NTC 250OHM 2983K DO35	307
MF52F104F4150 Cantherm	THERM NTC 100KOHM 4150K BEAD	0
NTCG104BH682JT1 TDK Corporation	THERM NTC 6.8KOHM 4067K 0402	8972
SM254R1K Wickmann / Littelfuse	THERM NTC 250KOHM 4140K MELF	0
EC95Y103ZN Thermometrics (Amphenol Advanced Sensors)	THERMISTOR NTC 10KOHM 3690K BEAD	0
NTCLE100E3479GB0A Vishay BC Components/Beyshlag/Draloric	NTC CU 0.6 LD CODED 47R 2%	0
NTCG163JF103FTDS TDK Corporation	THERMISTOR NTC 10KOHM 3380K 0603	0
B57321V2223J060 TDK EPCOS	THERMISTOR NTC 22KOHM 3940K 0603	4000
LR103G0J Wickmann / Littelfuse	THERMISTOR NTC 10KOHM 3750K 1206	0
NTCS0805E3222GMT Vishay BC Components/Beyshlag/Draloric	THERM NTC 2.2KOHM 3600K 0805	3507
NXRT15WB333JA1B030 TOKO / Murata	LEADED NTC THERMISTOR	0
NTHS0603N17N2003JE Vishay / Dale	THERM NTC 200KOHM 4247K 0603	1473
205RG1K Wickmann / Littelfuse	THERMISTOR NTC 2MOHM 4140K DO35	0
NCU18XH103J6SRB TOKO / Murata	SENSOR THERMISTOR NTC	2606
NTCG163NH221JT1 TDK Corporation	THERMISTOR NTC 220OHM 0603	3543
MF52A2222J3470 Cantherm	THERM NTC 2.2KOHM 3470K BEAD	1902
NTCALUG01A103FLA Vishay BC Components/Beyshlag/Draloric	NTC LUG01A 10K 1% 3435K G24 38MM	800

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.