Temperature Sensors - NTC Thermistors

Part Number	Description / PDF	Quantity
NTHS0603N02N6801KE Vishay / Dale	THERM NTC 6.8KOHM 3477K 0603	0
NTHS1206N02N7001KF Vishay / Dale	THERMISTOR NTC 7KOHM 3477K 1206	0
NTHS1206N02N5001JE Vishay / Dale	THERMISTOR NTC 5KOHM 3477K 1206	3099
NTHS0805N02N1052JU Vishay / Dale	THERM NTC 10.5KOHM 3477K 0805	0
01M1002FF Vishay / Dale	THERMISTOR NTC 10KOHM 3964K BEAD	1007
NTHS0805N17N1503JU Vishay / Dale	THERM NTC 150KOHM 4064K 0805	0
07T5002JF Vishay / Dale	THERMISTOR NTC 50KOHM BEAD	0
NTHS0805N02N5001JE Vishay / Dale	THERMISTOR NTC 5KOHM 3181K 0805	434
01M5001JF Vishay / Dale	THERMISTOR NTC 5KOHM BEAD	0
NTHS1206N02N1052KE Vishay / Dale	THERM NTC 10.5KOHM 3477K 1206	0
NTHS0603N02N6801JE Vishay / Dale	THERM NTC 6.8KOHM 3477K 0603	5325
NTHS1206N11N3002JE Vishay / Dale	THERMISTOR NTC 30KOHM 3691K 1206	0
01M3002JF Vishay / Dale	THERMISTOR NTC 30KOHM BEAD	0
NTHS0805N02N6801KE Vishay / Dale	THERM NTC 6.8KOHM 3477K 0805	0
NTHS0805N02N4701KU Vishay / Dale	THERM NTC 4.7KOHM 3477K 0805	0
NTHS0805N01N5002JU Vishay / Dale	THERMISTOR NTC 50KOHM 3964K 0805	0
NTHS0603N17N2203JF Vishay / Dale	THERM NTC 220KOHM 4064K 0603	0
08T1003JF Vishay / Dale	THERMISTOR NTC 100KOHM BEAD	0
NTHS1206N02N6801JU Vishay / Dale	THERM NTC 6.8KOHM 3477K 1206	0
NTCS0402E3474JHT Vishay / Dale	NTC SMD 0402, 470KOHM, 5%, B25/8	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.