1% 3380K 1005 Metric SMD NTC Thermistor Battery Chargers 10K OHM Thermistor

1005 Metric SMD NTC Thermistor 0402 10kOhms 1% 3380K For Battery Chargers
 
I Description Of The SMD NTC Thermistor 0402
 
NTC thermistor is a ceramic semiconductor thermal crystal sintered from various metal oxides mainly manganese, cobalt and nickel. It is extremely sensitive to temperature changes. Its zero-power resistance varies with the body temperature. As the temperature increases, the resistance value decreases exponentially, and the temperature coefficient is as high as (3~6%/℃). A small temperature change will cause a large resistance value change. According to the R-T resistance temperature curve of the thermistor, the precise resistance value of each temperature point can be measured. In the circuit, the temperature can be digitally corresponded through the resistance value for temperature measurement and control.AMPFORT thermistors have low thermal time constants which result in extremely high rates of resistance change to accurately track the temperature.
 
 
II Features Of The SMD NTC Thermistor 0402
 
1. Excellent solderability and high stability in environment
2. Excellent long time aging stability
3. High accuracy in resistance and B-constant
4. Reflow soldering possible
5. Lead is not contained in the product.
6. Recognized by UL/cUL
 

 
III Applications Of The SMD NTC Thermistor 0402
 
Temperature sensing, protection and compensation in industrial, telecom and consumer applications. Examples are:
• Battery chargers
• Power suppliers
• Office equipment
• LCD compensation
• In-car entertainment
 
 
IV Dimensional Drawing Of The SMD NTC Thermistor 0402(unit:mm)
 

 

V Sample application: Temperature detection and temperature compensation for smartphones and tablets
 
Many NTC thermistors are used in smartphones and tablets for temperature detection and temperature compensation.
Fig. 1: Major temperature detection and temperature compensation applications of NTC thermistors in smartphones and tablets

 
The basic circuit is a voltage-dividing circuit with an NTC thermistor and a fixed resistor connected in series. The resistance value of an NTC thermistor placed near a heat generating part such as a CPU or a power module decreases with rise of temperature and changes the output voltage of the voltage-dividing circuit.
This change is sent to a microcontroller to initiate temperature compensation actions and protect circuit components from overheating.
Fig. 2: Basic circuits for temperature detection and temperature compensation
 

 

VI Main Techno-Parameters(In static air) Of The SMD NTC Thermistor 0402
 

P/N	Resistance(25℃) (kΩ)	B Value(25/50℃)(K)	B Value(25/85℃)(K)	Permissible Operating Current(25℃)(mA)	Dissipation Factor (mW/℃)	Thermal Time Constant (s)
QN0402X102F3450FB	1.0	3450±1%	3500	1.00	0	<3
QN0402X152F3950FB	1.5	3950±1%	3987	0.81
QN0402X222F3450FB	2.2	3450±1%	3500	0.67
QN0402X222F3950FB	2.2	3950±1%	3987	0.67
QN0402X332F3450FB	3.3	3450±1%	3500	0.55
QN0402X332F3950FB	3.3	3950±1%	3987	0.55
QN0402X472F3500FB	4.7	3500±1%	3545	0.46
QN0402X472F3950FB	4.7	3950±1%	3987	0.46
QN0402X682F3500FB	6.8	3500±1%	3545	0.38
QN0402X682F3950FB	6.8	3950±1%	3987	0.38
QN0402X103F3380FB	10	3380±1%	3435	0.31
QN0402X103F3900FB	10	3900±1%	3935	0.31
QN0402X153F3950FB	15	3950±1%	3987	0.25
QN0402X223F3950FB	22	3950±1%	3987	0.21
QN0402X333F4050FB	33	4050±1%	4100	0.17
QN0402X473F4050FB	47	4050±1%	4100	0.14
QN0402X473F4485FB	47	4485±1%	4545	0.14
QN0402X493F3937FB	49.1	3937±1%	3973	0.13
QN0402X503F4100FA	50	4050	4100±1%	0.13
QN0402X683F4150FB	68	4150±1%	4210	0.12
QN0402X683F4485FB	68	4485±1%	4545	0.12
QN0402X104F4250FB	100	4250±1%	4310	0.10
QN0402X104F4360FB	100	4360±1%	4403	0.10
QN0402X104F4485FB	100	4485±1%	4545	0.10
QN0402X154F4500FB	150	4500±1%	4582	0.08
QN0402X224F3950FB	220	3950±1%	3987	0.06
QN0402X224F4250FB	220	4250±1%	4310	0.06
QN0402X224F4500FB	220	4500±1%	4582	0.06
QN0402X334F3950FB	330	3950±1%	3987	0.05
QN0402X334F4500FB	330	4500±1%	4582	0.05	0	<3
QN0402X474F4000FB	470	4000±1%	4045	0.04
QN0402X474F4500FB	470	4500±1%	4582	0.04
QN0402X684F4100FB	680	4100±1%	4135	0.03
QN0402X684F4500FB	680	4500±1%	4582	0.03

 
 
VII Advantages Of The SMD NTC Thermistor 0402
 
NTC thermistors are temperature-sensitive resistor elements using semiconductor ceramics with negative temperature coefficients (NTC). That means that the resistance decreases exponentially with rising temperature. The steeper the RT curve, the greater the change in resistance within a specified temperature range. With this property, they are often used as temperature sensors and also used as temperature protection devices for purposes such as temperature measurement and temperature compensation.
 

VIII Frequently Asked Question FAQ

Q: Are you manufacturer ?
A: Yes, we are manufacturer and distributor of famous brand such as Littelfuse.
Q: Which city does your factory in ?
A: Dongguan City,Guangdong Province, China
Q: May i know your working time ?
A: Official working time is 8:00 ~ 12:00 AM, 1:30 ~ 5:30 PM.However, sales in our overseas department will do overtime working and 7x24hours online.
Q: Do you accept custom made ?
A: Yes, we are professional in customization model based on rich experiences and professional engineering.It’s helpful if you can provide drawing or detailed specification should be.
Q: May i know your lead time ?
A: Lead time is 7 days for standard model and exact lead time depend on detailed requirements if special model selected.
Q: May i receive samples before place order ?
A: Yes, generally samples is free but sample cost should be charged if quantity is too many ,product cost is too much or new mould fee required.
Q: What’s your payment terms ?
A: T/T, Paypal etc.
Q: What’s currency you can accept ?
A: Mainly US dollars and Chinese Yuan
Q: Does your package method safe for transportation ?
A: Yes, our package would be 10~1000pcs per plastic bag -> multiple bags per box -> multiple boxes per carton and it is safe for express/air/boat shipment.