UL CQC MF51E Medical Application Varnished Wire Enamelled Wire Bead Type NTC Thermistor 10KOhm 3435

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Overview

MF51E Medical Application Varnished Wire Enamelled Wire NTC Thermistors were specially designed for use in electronic thermometers which require better than average accuracy. The extremely small size allows the thermistor to respond very quickly to tiny changes in temperature. The MF51E can be supplied un-calibrated with standard tolerances or calibrated and grouped according to R at 37°C±0.01% for extreme interchangeability so as to eliminate the need for other calibrations.

Application

Electronic Thermometers
Medical Equipment and Patient Monitoring

Features

• Small Size and fast response and light weight
• Available tolerances: ±0.5%, ±1%, ±2%, ±3% and ±5%
• B Value tolerances: ±0.5%, ±1.0% and ±2.0%
• Resistance calibration available at 37°C ±0.01% (see table for details of grouping)
• Long-term Stability and Reliability
• Excellent Tolerance and Interchangeability
• Available in all popular resistance values
• Dissipation Constant ≥0.7mW/°C
• Time Constant of ≤3.2 seconds
• Rated Power: 3.5mW
• Operating Temperature Range -40°C to 125°C

Specification

Dimension (Unit:mm)

Resistance Calibration at 37†C +/- 0.005℃ of MF51E303E3950

R37℃=30.025KΩ±2.664% B30/45=3950K±0.5%

Introduction of test and inspection equipments

Name: High/Low-Thermal Shock Chamber Function:test product withstand high/low-thermal shock chamber	Name : Constant temperature and humidity chamber Function: test products storage state under steady damp and heat
Name : Vibration testing equipment Function : test the effect on product during transportation generated by vibration frequency and amplitude	Name : Salt spray test machine Function: Test product resistance to oxidation,corrosion

Name : Laser particle size analyzer Function : Analyse material of laser particle size	Name : Vacum & high temperature dry oven Function : high temperature aging test
Name : Spectrum analyzer Function : analyze harmful substance content of products	Name : Electrolytic thickness gauge Function : Used for testing coating thickness of raw material

Name : Constant temp oil bath instrument Function : test ambient temperature at constant point resistance (tolerance ±0.002℃)	Name : Low Temperature precision test sink Function : Test temperature at constant point resistance during -70℃~0℃ (tolerance ±0.01℃)
Name : DC constant voltage and constant current power supply (high current) Function : Test U-I Curve	Name : High precision thermistor sorter Function : Test resistance of thermistor

Name : Dissipation and thermal time constant testing instrument Function : Test dissipation and thermal time constant	Name : NTC Impact tester Function : Test impulse capacitance which products can endure
Name : Withstand voltage test instrument Function : Test insulation withstand voltage	Name : DC constant voltage power supply Function : Test rated power consumption

Name : Projector Function : Test out appearance and inner structure	Name : Elongation rate instrument Function : Test elongation rate of leads
	Name : Aging stage Function : Test aging reliability of product

Reliability Test

Test Item	Test Standard	Test method	Performance requirements
Zero Power Resistance	IEC 60539-1	Immerse samples in the constant temperature bath at 25℃±0.005℃,test steady resistance	Resistance tol ±1%
B value	IEC60539-1	Immerse samples in the constant temperature bath at 25℃,50℃(or 85℃), test steady resistance,and calculate B value	Resistance tol ±1%
Free fall	IEC60068-2-32	Fall height: 1.5±0.1m,Surface: Cement , 1 time	No obvious damage, R25 △R/R≤±1%
Insulation	IEC60539-1	500V pressure on insulation shell test insulation resistance	>500MOhm
Withstand voltage	IEC60539-1	Withstand voltage: 1500V/AC ,Leakage current:2mA Lasting: 60sec	No obvious damage
Tension	IEC60068-2-21	Pull uniform speed at the end, F>4.0KG(requested by customer)	No obvious damage, R25 △R/R≤±1%
Vibration	Q/HBm 108-94	Test frequency: 10~500Hz,swing: 1.2mm acceleration: 30m/s2 Direction X,Y,Z Time:8Hour/direction	No obvious damage, R25 △R/R≤±1%
Steady humidity and heat	IEC60068-2-78	Temp:40±2℃ Humidity:92-95%RH Time:1000±24Hour	No obvious damage, R25 △R/R≤±1%
Thermal time constant	EC60539-1	Immerse in 25℃ water,after thermal balance,immerse in 85℃,resistance arrives 63.2%,calculate total time	<10 sec
High temperature storage	IEC60068-2-2	Temp:125℃±5℃ Time: 1000±24Hour	No obvious damage, R25 △R/R≤±1%
Cold and thermal shock	IEC60068-2-14	-40℃~+125℃ T1:30min Cycle time:1000	No obvious damage, R25 △R/R≤±1%
Knock experiment	IEC60068-2-77	Acceleration:250m/s2 Pulse lasting: 6ms Knock times: 1000 Recovery time: 2 Hour	No obvious damage, R25 △R/R≤±1%
Low temperature storage	IEC60068-2-1	Temp: 40±2℃ Time: 1000±24Hour	No obvious damage, R25 △R/R≤±1%
Salt spray	IEC60068-2-11	Temp: 35±2℃ Collection hour : 1.0mL~2.0mL Time: determine per as actual demand	No obvious damage, R25 △R/R≤±1%

Uchi was established in 2006 in Dongguan, China. 

After years of development, Uchi has become a large scale hi-tech enterprise that specialized in development and production of complete series of MOV,PTC, NTC series, PPTC series, Fuse(ALL TYPE),Resistor、integrated circuit 、 Capacitor, surge protector and protective devices of lightning protection products. It ranks front in the industry and has heartquarter in Hong Kong. With its excellent technology and quality products, Uchi has won wide recognition of overseas customers. Saini Impex PVT.LTD is our authorized sole distributor in india .

China's leading enterprise of circuit protection components​

Our strength ：

A large number of product series in our factory have passed the certification of various international standards




Factory Tour​ ：

Advanced equipment, lean production

Uchi boasts with a production base that covers an area of nearly 15000 square meters.
 

We successively imported high-tech fully automated production equipments and high precision testing instruments and have put into production to realize the automation, large scale and standardization.

Uchi has a galaxy of hi-tech talent teams headed up by national class experts to engage in the work of product development, product quality control, sales andservice technical support, etc., and has successively obtained tens of certificates of appearance patents, utility patents and inventions.
 

To guarantee the quality, we successfully passed the certification of ISO9001:2008 quality management system, scientific and efficient managing mode to carry out lean production and form scientific and efficient quality control system. The products are certified with UL, CUL, TUV, VDE, CSA and SGS, RACH 73 environmentally friendly testing certifications.

Exquisite quality at customers' favor

Uchi is an export membership of Alibaba with free import and export rights. It is appraised as Guangdong Famous Star Enterprise and Dongguan Private Enterprise. Our products have doubled and redoubled to provide more kinds and high quality and reliable products and service. Our products mainly consist of: 

Metal Oxide Varistor
DIP Varistor & SMD Varistor
Thermally Protected Varistor

DC-Link Capacitor for New energy vehicles supporting the HEVEV

Automotive Fuse Links for EV Plugin HEV FCEV
PTC Thermistor

NTC Thermistor

PPTC Resettable Fuse

Thermal Fuse

Auto Blade Fuse

Glass Fuses

Metal Film Resistor

Carbon Film Resistor

Cement Resistor

NTC Temperature Sensor

CDS Photoconductive Cell

Our products are widely used in New energy vehicles, home appliance, medical equipment, office equipment, communication equipment, phone battery, electronic calendar, electronic thermometer and temperature controller to cover military telecommunications, IT, automobile and consumer electronic fields.
Cooperation with good faiths to win in the market.
Excellent quality sincere service is the key to the success of Uchi. 

In the future Uchi will still stick to the tenets of "Quality first, customer foremost." "First class quality, first class service and customersatisfaction" to manufacture the high quality, technically advanced and reasonable prices products. We hope to trigger with global partners the revolution in resistor products. We cordially welcome friends from home and abroad to visit us for guidance and cooperation.