Temperature Sensors - NTC Thermistors

Part Number	Description / PDF	Quantity
ERT-JZEG103FA Panasonic	MULTILAYER NTC CHIP THERMISTOR	28311
192-502LET-A01 Honeywell Sensing and Productivity Solutions	THERMISTOR NTC 5KOHM 3887K BEAD	897
04M3302JF Vishay / Dale	THERMISTOR NTC 33KOHM BEAD	0
02C2001JF Vishay BC Components/Beyshlag/Draloric	NTC THERMISTORS	0
B57861S0302F040 TDK EPCOS	THERMISTOR NTC 3KOHM 3988K BEAD	406
NTCLE100E3503GB0 Vishay BC Components/Beyshlag/Draloric	THERMISTOR NTC 50KOHM 4190K BEAD	3478
NCP21XM472J03RA TOKO / Murata	THERM NTC 4.7KOHM 3500K 0805	37
NXRT15WF104FA1B040 TOKO / Murata	THERM NTC 100KOHM 4250K BEAD	13144
NCP15WF104F03RC TOKO / Murata	THERM NTC 100KOHM 4250K 0402	1987801
B57551G1104H000 TDK EPCOS	THERM NTC 100KOHM 4072K BEAD	0
ERT-J0EV104F Panasonic	MULTILAYER NTC CHIP THERMISTOR	0
NCP03WL154J05RL TOKO / Murata	THERM NTC 150KOHM 4485K 0201	0
MF11-0007510 Cantherm	THERMISTOR NTC 75OHM 3000K DISC	0
NTCLE100E3202HB0A Vishay BC Components/Beyshlag/Draloric	NTC CU 0.6 LD CODED 2K 3%	0
MF11-0100010 Cantherm	THERMISTOR NTC 1KOHM 3600K DISC	0
502FG1J Wickmann / Littelfuse	THERMISTOR NTC 5KOHM 3419K DO35	0
NJ28PA0203F-- Elco (AVX)	THERMISTOR NTC 20KOHM 4235K DISC	0
B57550G0502F000 TDK EPCOS	THERMISTOR NTC 5KOHM 3480K BEAD	1080
04M2002SFC3 Vishay BC Components/Beyshlag/Draloric	NTC THERMISTORS	0
NHQ472B355T10 Thermometrics (Amphenol Advanced Sensors)	THERM NTC 4.7KOHM 3550K 1206	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.