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PTC Thermistors

PTC Thermistors
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PTC Thermistors

Product catalog summary
Important Notes: This section provides general guidelines and disclaimers for EPCOS products, emphasizing that suitability statements are not binding and customers must verify product suitability for specific applications. It highlights the potential for electronic component malfunctions and the need for protective measures in critical applications. It also notes that some products may contain restricted substances and that specifications may change over time.
Overview: The document details specifications and applications for various EPCOS components, including PTC thermistors, leaded disks, telecom pair protectors, motor starting applications, limit temperature sensors, and heating elements. It includes technical data, ordering codes, and dimensional drawings.
PTC Thermistors: These components are highlighted for their role in overcurrent protection, motor starting, and as self-regulating heating elements. The document emphasizes the diversity of PTC thermistor types available for different applications.
Overcurrent Protection: PTC thermistors are used for overload and short-circuit protection in devices like motors and transformers. Specifications include rated current, switching current, and resistance for various models.
Inrush Current Limiters: PTC thermistors replace high-power fixed resistors for capacitor charging. Specifications for leaded disk and housed inrush current limiters include maximum voltage, rated resistance, and heat capacity.
Telecom Applications: PTC thermistors are used for overcurrent protection in telecom applications, particularly in line card applications such as POTS.
Additional Sections: The document includes sections on switching applications, motor starting, limit temperature sensors, heating elements, sample kits, cautions and warnings, symbols and terms, and contact information.
Reliability Testing: Thermistors should undergo reliability testing during the design-in phase under worst-case conditions to ensure suitability.
Storage Guidelines: Thermistors must be stored in original packaging at temperatures between -25°C and +45°C with relative humidity ≤ 75%. Avoid contamination and harmful environments.
Handling Instructions: Avoid dropping PTCs and touching ceramic/metallization with bare hands. Gloves are recommended to prevent contamination.
Soldering Recommendations: Use rosin-type or non-activated flux, ensure proper preheating, and avoid rapid cooling. Complete flux removal is advised.
Mounting Precautions: Ensure electrodes are not scratched and contacts are clean. Maintain minimum force and pressure on clamping contacts.
Operational Conditions: Operate thermistors within specified temperature, voltage, and current ranges. Avoid harmful environmental conditions and ensure fail-safe functions.
Ordering Codes: EPCOS product ordering codes may vary across different documents but do not affect product specifications.
Symbols and Terms: Definitions for various technical terms and symbols related to thermistors are provided.
Contact Information: Detailed contact information for EPCOS sales offices and distributors worldwide is included.
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Catalog excerpts

PTC Thermistors-1

EPCOS Product Profile 2016

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PTC Thermistors-3

Inrush current limiters 11 Limit temperature sensors 17

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PTC Thermistors-4

Important Notes The following applies to all products named in this publication: 1. Some parts of this publication contain statements about the suitability of our products for certain areas of application. These statements are based on our knowledge of typical requirements that are often placed on our products in the areas of application concerned. We nevertheless expressly point out that such statements cannot be regarded as binding statements about the suitability of our products for a particular customer application. As a rule, EPCOS is either unfamiliar with individual customer applications...

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This short form catalog presents the wide selection of EPCOS PTC thermistors. With decades of experience in the development, manufacture and marketing of electronic components, TDK is the world market leader in PTC thermistors, and one of the world’s biggest producers of electronic components, modules and systems. PTC thermistors are ceramic components whose electrical resistance rapidly increases when a certain temperature is exceeded. This property makes them ideal for use in countless applications of modern electrical and electronic engineering, for example, as self-resetting fuses against...

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Applications • Overload and short-circuit protection, e.g. for - motors - transformers - switch-mode power supplies - battery chargers - automotive electronics Dimensional drawing Please read Important notes on page 4 and Cautions and warnings on page 25.

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Leaded disks, coated Rated current Ir mA Please read Important notes on page 4 and Cautions and warnings on page 25.

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PTC Thermistors-8

Rated current Ir mA Leaded disks, coated and uncoated Please read Important notes on page 4 and Cautions and warnings on page 25.

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Dimensional drawing 11 Measured on component soldered to standardized PCB (material FR4, thickness 1.5 mm). Please read Important notes on page 4 and Cautions and warnings on page 25.

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Rated current Ir mA Please read Important notes on page 4 and Cautions and warnings on page 25.

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PTC Thermistors-11

Applications • Inrush current limiter for smoothing and DC link capacitors • To replace high-power fixed resistors for capacitor charging Dimensional drawing mm Inrush current limiters in housing Maximum voltage V max V AC Please read Important notes on page 4 and Cautions and warnings on page 25.

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PTC Thermistors-12

Applications • Overcurrent protection for telecom applications • Suitable for line card applications e.g. POTS, access networks, customer premises equipment (CPE) or integrated voice data (IVD) Rated resistance Dimensional drawing 12 Please read Important notes on page 4 and Cautions and warnings on page 25,

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PTC Thermistors-13

Telecom pair protector (TPP) Rated resistance Rr n Dimensional drawing Please read Important notes on page 4 and Cautions and warnings on page 25.

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Telecom pair protector (TPP) Rated resistance RR Switching Resistance Ordering code current matching IS @ 25°C in one housing |R2 – R1| mA Ω Dimensional drawing Telecom pair protector (TPP), for GR1089 Central Office Rated resistance RR Switching Resistance Ordering code current matching IS @ 25°C in one housing |R2 – R1| mA Ω Dimensional drawing Please read Important notes on page 4 and Cautions and warnings on page 25.

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Applications • For delayed switching, primarily in switch-mode power supplies PTC thermistors in plastic case Rated resistance Rr n Dimensional drawing Please read Important notes on page 4 and Cautions and warnings on page 25.

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Applications • Motor start in compressors and air conditioning systems (refrigerators) • Time delay in turning off the auxiliary winding of single-phase AC motors (e.g. refrigerator compressors) Standard sizes Operating current Dimensional drawing Low power consumption Operating current Imax A Dimensional drawing 1 PTC clamped between crown contacts (diameter: 2 mm). Please read Important notes on page 4 and Cautions and warnings on page 25.

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Applications Sensors for limit temperature monitoring • in lighting applications • in home appliances (dish washers, washing machines, ironing machines, electric cookers etc.) • in automotive electronics • in data and communications engineering (DC/DC converters) • in motor windings Dimensional drawing Motor protection, triple sensors Vmax = 30 V DC, insulating test voltage Vins = 2.5 kV AC, AT = ±5 K Please read Important notes on page 4 and Cautions and warnings on page 25.

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PTC Thermistors-18

Limit temperature sensors, leaded disks, coated, miniaturized Sensing temperature Tsense °C Dimensional drawing Sensing temperature Tsense °C Dimensional drawing Please read Important notes on page 4 and Cautions and warnings on page 25,

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Dimensional drawing mm Type D1052 Sensing temperature Tsense °C Dimensional drawing Please read Important notes on page 4 and Cautions and warnings on page 25.

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Limit temperature sensors, superior series Dimensional drawing Rated resistance RR (V < Vmax) n Dimensional drawing mm EIA case size 0805 1.25±0.2 Please read Important notes on page 4 and Cautions and warnings on page 25.

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Limit temperature sensors, standard series Rated resistance Rr (V < Vmax) n Dimensional drawing SMD Rated resistance RR (V < Vmax) n Dimensional drawing Please read Important notes on page 4 and Cautions and warnings on page 25.

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Applications For all sorts of heating systems • In household appliances (hot plates, water heaters, hot-adhesive pistols, hair curlers etc.) • In automotive electronics (preheating of diesel filter and injection system, additional heating of passenger compartment) • In medical appliances (vaporizers, inhalators) Reference temperature Tef (typ.) °C Dimensional drawing 11 Measured between points. 21 T (Rptc = Rmin) < 25 °C 22 Please read Important notes on page 4 and Cautions and warnings on page 25,

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Rectangular with silver metallization Dimensional drawing 11 Measured between points 2) T (Rptc = Rmin) < 25 °C Please read Important notes on page 4 and Cautions and warnings on page 25.

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