Temperature Sensors - NTC Thermistors

Image	Part Number	Description / PDF	Quantity	Rfq
	NTHS1006N02N7001JR Vishay / Dale	THERMISTOR NTC 7KOHM 3477K 1006	0
	NTHS1206N01N2202KG Vishay / Dale	THERMISTOR NTC 22KOHM 3964K 1206	0
	NTHS1206N01N3302JE Vishay / Dale	THERMISTOR NTC 33KOHM 3890K 1206	0
	NTHS1006N01N3002JE Vishay / Dale	THERMISTOR NTC 30KOHM 3964K 1006	0
	NTHS0805N04N2203KR Vishay / Dale	THERM NTC 220KOHM 4247K 0805	0
	NTHS1006N01N3302JE Vishay / Dale	THERMISTOR NTC 33KOHM 3964K 1006	0
	NTHS1206N11N2002JR Vishay / Dale	THERMISTOR NTC 20KOHM 3691K 1206	0
	09B1002JF Vishay / Dale	THERMISTOR NTC 10KOHM BEAD	0
	07B1003JF Vishay / Dale	THERMISTOR NTC 100KOHM BEAD	0
	08B3002JF Vishay / Dale	THERMISTOR NTC 30KOHM BEAD	0
	09B2002JF Vishay / Dale	THERMISTOR NTC 20KOHM BEAD	0
	T07N125F Vishay / Dale	THERMISTOR NTC	0
	07B5002JF Vishay / Dale	THERMISTOR NTC 50KOHM BEAD	0
	04T1003MF Vishay / Dale	THERMISTOR NTC 100KOHM	0
	04B3002JF Vishay / Dale	THERMISTOR NTC 30KOHM BEAD	0
	07B1003FF Vishay / Dale	THERMISTOR NTC	0
	02B0500JF Vishay / Dale	THERMISTOR NTC 50KOHM BEAD	0
	08B1003JF Vishay / Dale	THERMISTOR NTC 100KOHM BEAD	0
	07W5002JF Vishay / Dale	THERMISTOR NTC	0
	03T2200JF Vishay / Dale	THERMISTOR NTC 220OHM BEAD	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.