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termistor NTC

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Re: termistor NTC

Notapor pichu » Jue, 10 May 2012, 15:46

Catalogo de NTC Thermistors de Siemens



General technical information 23
1 Definition 23
2 Manufacture 23
3 Characteristics 23
3.1 Unloaded NTC thermistors 24
3.1.1 Temperature dependence of resistance 24
3.1.2 B value 24
3.1.3 Tolerance 25
3.1.4 Temperature coefficient a 27
3.1.5 Zero-power measurement 27
3.2 Electrically loaded NTC thermistors 27
3.2.1 Voltage/current characteristic 28
3.2.2 Behavior in different media 30
3.2.3 Maximum power rating P 30
3.2.4 Dissipation factor dth 30
3.2.5 Heat capacity Cth 30
3.2.6 Thermal cooling time constant tc 31
3.2.7 Thermal time constant ta 31
3.2.8 Ageing and stability 31
4 Application notes 32
4.1 Applications utilizing the influence of ambient temperature
on resistance (self-heating negligible!) 32
4.1.1 Temperature measurement 32
4.1.2 Linearizing the R/T characteristic 32
4.1.3 Temperature compensation 34
4.2 Applications utilizing the non-linear voltage/current characteristic
(in self-heated mode) 35
4.2.1 Inrush current limiting 35
4.2.2 Series and parallel connection 36
4.2.3 Self-heating 37
4.2.4 Load derating 38
4.2.5 Restart 38
4.2.6 Dependence of NTC resistance on current 38
4.2.7 Pulse strength 39
4.2.8 Applications 40
4.3 Applications utilizing the influence of the disspation factor
on the voltage/current characteristic 41
4.3.1 Liquid level sensors 41
4.3.2 Flow rate and vacuum measurement 42
4.4 Applications utilizing the current/time characteristic 43
Contents
Contents
6 Siemens Matsushita Components
Data sheets 45
Temperature measurement 45
SMDs 45
Leadless disks 49
Glass-encapsulated NTC thermistors 52
Leaded disks 57
Miniature sensors 69
Probe assemblies 82
Inrush current limiting 99
Standardized R/T characteristics 107
1 Introduction 107
2 Resistance tolerance 108
3 Temperature tolerance 109
4 Characteristics 110
Mounting instructions 139
1 Soldering 139
1.1 Leaded NTC thermistors 139
1.2 Leadless NTC thermistors 139
1.3 SMD NTC thermistors 139
1.3.1 Wettability test 139
1.3.2 Soldering heat resistance test 140
1.3.3 Recommended soldering temperature profiles 140
1.3.4 Notes 142
2 Conductive adhesion 142
3 Clamp contacting 142
4 Robustness of terminations 142
5 Sealing and potting 143
6 Cleaning 143
7 Storage 143
Quality 145
1 Manufacturing process and quality assurance 145
2 General 146
3 Sequence of quality assurance measures 146
3.1 Incoming inspection 146
3.2 Process assurance 146
3.3 Product assurance 146
3.4 Final inspection 146
Contents
Siemens Matsushita Components 7
4 Delivery quality 146
5 Sampling inspection 147
6 Classification of defects 147
7 AQL values 147
8 Incoming inspection by the customer 148
9 Reliability 149
10 Identification and traceability 149
11 Supplementary information 150
Environmental protection measures 151
Climatic conditions 153
1 Reliability data 153
2 Operating temperature range / ambient temperatures 153
Taping and packing 155
1 Taping of SMD thermistors 155
2 Taping of radial-lead NTC thermistors 157
3 Taping of M 87 NTC thermistors 160
4 Packing codes 160
Symbols and terms 161
Última edición por pichu el Jue, 10 May 2012, 15:58, editado 1 vez en total
pichu
 
Mensajes: 244
Registrado: Vie, 08 Jul 2011, 22:01


Re: termistor NTC

Notapor pichu » Jue, 10 May 2012, 15:46

Catalogo de General electric Thermometrics Glass Coated Bead Thermistors


pichu
 
Mensajes: 244
Registrado: Vie, 08 Jul 2011, 22:01


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