Temperature Sensors - NTC Thermistors

Part Number	Description / PDF	Quantity
ERT-J1VT224FM Panasonic	THERM NTC 220KOHM 4485K 0603	1535
ERT-JZET224J Panasonic	THERM NTC 0201	14765
ERT-J1VR472H Panasonic	MULTILAYER NTC CHIP THERMISTOR	3990
ERT-J1VR223J Panasonic	THERMISTOR NTC 22KOHM 4250K 0603	69842
ERT-J1VT222J Panasonic	THERM NTC 2.2KOHM 4500K 0603	3689
ERT-J0ET333J Panasonic	MULTILAYER NTC CHIP THERMISTOR	9000
ERT-J0ER223H Panasonic	MULTILAYER NTC CHIP THERMISTOR	3534
ERT-J0ET152J Panasonic	THERM NTC 1.5KOHM 4500K 0402	28485
ERT-J0ET104HM Panasonic	THERM NTC 100KOHM 4485K 0402	9855
ERT-J1VR153J Panasonic	THERMISTOR NTC 15KOHM 4250K 0603	18407
ERT-J1VT472H Panasonic	MULTILAYER NTC CHIP THERMISTOR	3525
ERT-J1VR223G Panasonic	MULTILAYER NTC CHIP THERMISTOR	2630
ERT-J0EP473G Panasonic	MULTILAYER NTC CHIP THERMISTOR	10000
ERT-JZER104F Panasonic	MULTILAYER NTC CHIP THERMISTOR	17223
ERT-J1VG103JA Panasonic	THERMISTOR NTC 10KOHM 3380K 0603	48458
ERT-J0EV474GM Panasonic	THERM NTC 470KOHM 4700K 0402	3679
ERT-J0EA101J Panasonic	THERMISTOR NTC 100OHM 2800K 0402	19586
ERT-J1VA470J Panasonic	THERMISTOR NTC 47OHM 2800K 0603	10053
ERT-J0EP473JM Panasonic	THERMISTOR NTC 47KOHM 4050K 0402	6790
ERT-J0ET472H Panasonic	MULTILAYER NTC CHIP THERMISTOR	8483

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.