Temperature Sensors - NTC Thermistors

Part Number	Description / PDF	Quantity
NTHS0603N02N6801JE Vishay / Dale	THERM NTC 6.8KOHM 3477K 0603	5325
503JG1J Wickmann / Littelfuse	THERMISTOR NTC 50KOHM 3892K DO35	396
RL1005-468-73-D1 Thermometrics (Amphenol Advanced Sensors)	THERMISTOR NTC 750OHM 3468K DISC	0
EC95G503V Thermometrics (Amphenol Advanced Sensors)	THERMISTOR NTC 50KOHM 4252K BEAD	0
USP10979 Wickmann / Littelfuse	THERM NTC 10KOHM 3892K PROBE	500
ERT-J0ER683J Panasonic	MULTILAYER NTC CHIP THERMISTOR	9975
NTCS0805E3333GHT Vishay BC Components/Beyshlag/Draloric	THERMISTOR NTC 33KOHM 3920K 0805	7886
MA100BF103BN Thermometrics (Amphenol Advanced Sensors)	THERM NTC 10KOHM 3969K PROBE	980
NJ28MA0302H-- Elco (AVX)	THERMISTOR NTC 3KOHM 3960K DISC	0
ERT-J1VT152H Panasonic	MULTILAYER NTC CHIP THERMISTOR	7588
175-444QBF-301 Honeywell Sensing and Productivity Solutions	THERM NTC 440KOHM 4138K 1206	5051
AA6B4-GC11KA143L/37C Thermometrics (Amphenol Advanced Sensors)	THERMISTOR NTC 22KOHM 3500K BEAD	0
B57550G0503F000 TDK EPCOS	THERMISTOR NTC 50KOHM 3992K BEAD	1605
ERT-J1VT302J Panasonic	THERMISTOR NTC 3KOHM 4500K 0603	1317
NTCLE100E3104JT2A Vishay BC Components/Beyshlag/Draloric	NTC CU 0.6 LD CODED 100K 5% 2E	0
KS302J2 Wickmann / Littelfuse	THERMISTOR NTC 3KOHM 3892K BEAD	0
TC222J2K Wickmann / Littelfuse	THERM NTC 2.252KOHM 3892K BEAD	0
NTHS1206N11N3002JE Vishay / Dale	THERMISTOR NTC 30KOHM 3691K 1206	0
01C1002SFA3 Vishay BC Components/Beyshlag/Draloric	NTC THERMISTORS	0
ERT-J1VT224FM Panasonic	THERM NTC 220KOHM 4485K 0603	1535

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.