Application:
Electronic thermometer, medical devices
Features:
Quick thermal sensing response and high delicacy
High resistance precision and good coherence
High working stability and reliability
Small size and light weight
Introduction:
Tjd series are insulation film ntc thermistors, our latest product developed with innovative technique, designed for the purpose of temperature detection, control and compensation of electric and electronic products.
Application:
Computer, printer, and home electric appliances, etc.
Introduction:
Mf58 series are purified glass wrapped diode thermistors with two terminals extending axially, processed with the combination of ceramic and semiconductor techniques.
Application:
, integrate circuits, quartz crystal oscillators and thermocouples.
-- for liquid level display and flow rate measurement, and cell phone battery.
Features:
Wide range of resistance with high resistance precision: 0.1-1000k¬+
Usable in high-temperature and high-moisture environments due to the glass wrapping small, light, firm, and convenient for automation mounting on printed circuit board
Quick response to thermal sensing with high sensitivity
High working stability and reliability
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1.Wide operating temperature range: -40 to +300íµ
2.Dielectric strength: 1, 500v ac for one second
3.Short thermal response time in water, high stability in moisture
4.Suitable for use in high-temperature and moisture environments
5.High accuracy, small dimensions, different tolerancr available , cost-effective
6.Ul approval , rohs compliant
7.Climatic category:iec60068-1
8.Resistance tolerance ú¦ía1%í½ía10%
9.Insulation resistance: í²100mª+
10.Dissipation constant:min. 3mw/íµú¿still airú¬
11.Thermal time constant : 8 seconds max (still air)
12.Thermal time constant : 2 seconds max (stirred liquid)
13.Moisture resistance:(40íµ 95% rh)1000 hours
R valueú¦10k-5000k
B valueú¦3435, 3950, 3977, 3899, , 4050, 4020 etc.
Precisionú¦+/-1%--+/-10%
1.Fast response , high sensitive.
2.Glass sealing, able to stand for low temperature
3.Coaxial structure makes it easy to install and can stand for high temperature
R value :10k--5000k
B value :3950, 3899, 4020, 4050, 4200, etc.
Precisionú¦+/-1%--+/-10%.
1.Fast response , high sensitive.
2.Glass sealing, able to stand for low temperature
3.Coaxial structure makes it easy to install and can stand for high temperature
R value :10k--5000k
B value :3950, 3899, 4020, 4050, 4200, etc.
Precisionú¦+/-1%--+/-10%
PTC thermistor
Used for over heat protection of various equipment & motors
Available for switching temperatures from 60 deg c to 190 deg c
PTCs in single, double and triple versions can be supplied
Weight is approximately 5 gm per single piece
The PTC thermistor has a diameter of 3 mm
The ST-100 has a waterproof housing and is designed for measuring soil and water temperature. The ST-110 minimizes solar load and thermal conduction to accurately measure air temperature. The ST-200 measures delicate or small surfaces with a fast response time.
PTC thermistors current protector, also called PTC thermistor resettable fuses, protect load against over-current, overload, short circuit. No need for replacement, resume protective function after a short cooling-down time.
Ceramic PTC (positive temperature coefficient) thermistors are used instead of conventional fuses to protect load, such as motors, transformers, or electronic circuit, against overcurrent for circuit protection. PTC thermistor protector not only respond to inadmissibly high currents but also if a preset temperature limit is exceeded. PTC thermistor over-current protector limits the power dissipation of the whole circuit by increasing their resistance and thus reducing the current to a harmless residual value. In contrast to conventional fuses, PTC thermistor resettable fuses do not have to be replaced after elimination of the fault but resume their protective function immediately after a short cooling-down time.
PTC Thermistor Over-current Protector Application
It applies in the over-current overload and short circuit protection of transformers, battery charger, switches, switch power supply, adaptor, meter, instrumentation, apparatus, electronic coils, control panels, air conditioner, automotive electron, etc.
Operating Principle of PTC Thermistor for Overload Over-current Protection
The operating principle is as indicated in the following. When a circuit is in the normal status, the current through PTC is lower than the rated current and PTC thermistor protector is in the normal state with small resistance value, which will not affect the normal operation of the protected circuit. In case of some fault in the circuit and the current is greater than the rated current, the PTC thermistor protector will become hot quickly and present a high resistance state, which sets the circuit relatively "off" to protect the circuit from damage. After the fault is removed, PTC thermistor protector will automatically restore its low resistance state and the circuit will resume normal operation.
Normally, when PTC thermistor is used as an overcurrent protection component, it is preferred to select maximum operating current, maximum operating voltage and proper specifications. Furthermore such factors should be taken into consideration as the dimensions of the components, rated zero-power resistance, operating temperature range, etc.
Please provide the resistance , precision and beta value with application for study.
You may also send the current spec detail for us.
And we will provide the equivalent at the soonest.
PTC thermistors current protector, also called PTC thermistor resettable fuses, protect load against over-current, overload, short circuit. No need for replacement, resume protective function after a short cooling-down time.
Ceramic PTC (positive temperature coefficient) thermistors are used instead of conventional fuses to protect load, such as motors, transformers, or electronic circuit, against overcurrent for circuit protection. PTC thermistor protector not only respond to inadmissibly high currents but also if a preset temperature limit is exceeded. PTC thermistor over-current protector limits the power dissipation of the whole circuit by increasing their resistance and thus reducing the current to a harmless residual value. In contrast to conventional fuses, PTC thermistor resettable fuses do not have to be replaced after elimination of the fault but resume their protective function immediately after a short cooling-down time.
PTC Thermistor Over-current Protector Application
It applies in the over-current overload and short circuit protection of transformers, battery charger, switches, switch power supply, adaptor, meter, instrumentation, apparatus, electronic coils, control panels, air conditioner, automotive electron, etc.
Operating Principle of PTC Thermistor for Overload Over-current Protection
The operating principle is as indicated in the following. When a circuit is in the normal status, the current through PTC is lower than the rated current and PTC thermistor protector is in the normal state with small resistance value, which will not affect the normal operation of the protected circuit. In case of some fault in the circuit and the current is greater than the rated current, the PTC thermistor protector will become hot quickly and present a high resistance state, which sets the circuit relatively "off" to protect the circuit from damage. After the fault is removed, PTC thermistor protector will automatically restore its low resistance state and the circuit will resume normal operation.
Normally, when PTC thermistor is used as an overcurrent protection component, it is preferred to select maximum operating current, maximum operating voltage and proper specifications. Furthermore such factors should be taken into consideration as the dimensions of the components, rated zero-power resistance, operating temperature range, etc.
Temperature Protection PTC Thermistor Description
PTC (positive temperature coefficient )thermistor switches at one particular temperature. Making use of the characteristics that the resistance of PTC thermistor increases sharply above curie temperature, when ambient temperature increases abnormally, protective circuit installed PTC thermistor will turn on or cut off loop through resistance changing, achieving thermal protection purpose. PTC thermistor protect such equipment and components as motors, transformers, power transistors and thyristors against over-temperature. A PTC thermistor is less expensive than a thermostat, and its switch temperature can be more accurately specified. It is also smaller and easier to design-in to electronic circuitry. Therefore PTC thermistor can be ideal devices for temperature detection, monitoring, indicating, limiting and over (excessive) temperature protection.
Typical Application of PTC Thermistor for Temperature Protection and temperature limiting sensors
Limit temperature measurement of Industrial electronics application.
Power supplies, switch power supply.
Home appliances, such as dish washers, washing machines, ironing machines, electric cookers, etc.
Electronic data processing and communications engineering (DC/DC converters).
Motor windings overheating Protection.
Automotive electronics.
Semiconductor heatsinks, enclosure panels, temperature-limited transistors.
Lighting applications.
Features of PTC Thermistor for Temperature Protection and temperature limiting sensors
2 Outlook construction: A-radial leaded epoxy resin coated form, B-metal tag lug form.
PTC Thermistor Protection temperature: 60-130C
Quick response.
Long stability.
Small dimension, convenient for installation.
Do not need to be reset after protection.
Ptc thermistors are used to monitor temperature in machines and installations. The design ensures short response times and easy installation.
The product sells point
Ptc thermistors acc. To din 44081(triple sensors acc. To din 44082) are used to protect electrical machines against thermal overload. Thermistors have an even steeper r/t characteristic as that defined in the din standard. The temperature range is from 60 to 180. Ptc thermistors beads with different rated response temperatures can be connected in series. This permits an optimal and economic thermal protection of machines and windings with different limit tempratures.
Key specifications/special features
Single triple
Max.Operating voltage 30 30 v
Rated response temperature tk60-18 c
Tolerance of tk ía5 ía5 k
Resproducibility of tk ía0.5 ía0.5 k
Resistance r25 ín100 ín300 ª+
Resistance at a temperature of tk-5k ín550 ín1650 ª+
Resistance at a temperature of tk +5k í²1330 í²3990 ª+
Resistance at a temperature of tk +15k í²4 í²12 kª+
Thermal response time td ín5 ín5 s
Insulation test voltage v ac2.5 ac2.5 kv
Max.Operating temprature 200 200 c
Max.Storage temperature 160 160 c
Min.Srorage temperature -25 -25 c
Weight 2 3.5 g
Description
A thermistor is a thermally sensitive resistor
Whose primary function is to exhibit a change
In electrical resistance with a change in body
Temperature.
Ntc thermistor is one in which the zero-power
Resistance decreases with an increase in temperature.
Features
Multilayer structure allows diverse resistance value in the same b constant.
Ultra small size, low capacitor, high b value.
Glass coated perform for long term reliability
Non-polarized for mounting.
Possibility for flow/reflow soldering.
Applications
Temperature compensation for crystal oscillatorf]tcxof^.
Temperature compensation for personal computer.
Temperature detection for cpu and memory device.
Temperature detection for battery pack.
Temperature compensation for contrast of lcd.
Temperature compensation and sensing of car audio equipments.
(cd, md, tuner).
Thermistor protection relay
Used for giving fool proof protection against overheating alongwith PTC thermistor
Uses the signal of ptc thermistors and switches off the equipment to be protected when dangerous temperature is attained
Available with large variety of input supply voltages for the convinience of the user
The relay is din rail mounting type
Weight is approximately 200 gms
Dimensions (h x w x d):
77 x 30 x 115 mm
Taped In Reel High Accuracy 0805 Monolithic Multilayer NTC Thermistor 100K 5% 4250
I Description Of The Multilayer NTC Thermistor 0805
Standard Surface Mount NTC Thermistor available in the 0805 package.
NTC (Negative Temperature Coefficient) thermistors, which are typically composed of metal oxides, are manufactured to take on the form of disks, rods, chips and other shapes. A more common shape, the SMD (surface mount device), is widely used in standard reflow soldering processes. The different values and tolerances offered by the industry allow many renditions of package sizes within the dimensional constraints of an EIA standard. Although the SMD EIA standard specifies a maximum component height, in most cases a minimum is not, allowing the manufacturer greater flexibility in offering different values within an NTC. This bulletin will focus on the methods and materials recommended for component attachment either through hand soldering for prototype construction or reflow/wave soldering operations for normal production.
II Application Of The Multilayer NTC Thermistor 0805
· Temperature sensing, control and detection
· Temperature compensation of transistors, ICs and crystal oscillators in mobile
· Consumer electronics
· Automotive electronics
· LCD controls
· Office automation equipment
· Communication equipment
· IT equipment
· Mobile devices
· Battery packs
· Battery chargers
· Hybrid ICs
· AV equipment
IV Main Techno-Parameters(In static air) Of The Multilayer NTC Thermistor 0805
P/N Resistance(25) B Value(25/50)(K) B Value(25/85)(K) Operating Current (25)(mA) Dissipation Factor (mW/) Thermal Time Constant (s)
(k)
QN0805X102F3650FB 1 3650±1% 3700 1.4 2
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