Temperature Sensors - NTC Thermistors

Part Number	Description / PDF	Quantity
B57891M0333J000 TDK EPCOS	THERMISTOR NTC 33KOHM 4300K DISC	4129
JS8741A Thermometrics (Amphenol Advanced Sensors)	PIPE CLIP FLUID TEMP SENSOR 2.7K	2006
NTCLE100E3202HT1A Vishay BC Components/Beyshlag/Draloric	NTC CU 0.6 LD CODED 2K 3% 1E	0
01M1002FF Vishay / Dale	THERMISTOR NTC 10KOHM 3964K BEAD	1007
ACC013 Ametherm	THERMISTOR NTC 5KOHM 3934K BEAD	0
173-473LAF-301 Honeywell Sensing and Productivity Solutions	THERMISTOR NTC 47KOHM 4150K 0805	6
NTCLE100E3681GT2A Vishay BC Components/Beyshlag/Draloric	NTC CU 0.6 LD CODED 680R 2% 2E	0
NTHS0805N17N1503JU Vishay / Dale	THERM NTC 150KOHM 4064K 0805	0
ACM011 Ametherm	THERMISTOR NTC 10KOHM 3475K BEAD	75
NCP18XV103J03RB TOKO / Murata	THERMISTOR NTC 10KOHM 3900K 0603	0
ND03Q00683K-- Elco (AVX)	THERMISTOR NTC 68KOHM 4300K DISC	0
NTCG163JF103HTDS TDK Corporation	THERMISTOR NTC 10KOHM 3380K 0603	4000
MF11-0007505 Cantherm	THERMISTOR NTC 75OHM 3000K DISC	0
NTCG164BH472JT1 TDK Corporation	THERM NTC 4.7KOHM 4067K 0603	3075
B57875S0103F151 TDK EPCOS	THERMISTOR NTC 10KOHM 3988K BEAD	0
SC30Y103WN Thermometrics (Amphenol Advanced Sensors)	THERMISTOR NTC 10KOHM 3690K BEAD	0
NTCLE100E3471GT1A Vishay BC Components/Beyshlag/Draloric	NTC CU 0.6 LD CODED 470R 2% 1E	0
RL1006-27.7K-122-D1 Thermometrics (Amphenol Advanced Sensors)	THERMISTOR NTC 50KOHM DISC	0
2138641635 Woodhead - Molex	NTC RING CABLE - 3964 M3 150MM 1	1983
B57164K0151J052 TDK EPCOS	THERMISTOR NTC 150OHM 3200K DISC	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.