Product Specification
SMD MELF 10K OHM High Temperature Resistant Glass Sealed High
Precision Fast Response NTC Thermistor
MF59 Glass Encapsulated Thermistor NTC thermistor is a negative
temperature coefficient thermistor. It uses a single high-purity
material with a density close to the theoretical density and is a
high-performance ceramic structure. Therefore, while achieving
miniaturization, it also has the characteristics of small
fluctuations in resistance with temperature, rapid response to
temperature changes and other characteristics, which can achieve
high sensitivity and high precision detection. Our company provides
small, high-reliability products of various shapes and functions to
meet customer requirements.
R25(Ω): 0.1K～1000K
Application: office automation equipment, digital equipment,
rechargeable batteries
Product features:
● The NTC chip is encapsulated in glass and can be used in any
harsh environment such as high temperature and high humidity.
● To ensure the heat resistance of the product, the product is
encapsulated in glass and can work stably and reliably at a high
temperature of 300℃.
●High temperature measurement accuracy, good stability and wide
resistance range. The resistance accuracy is up to 0.3℃ and the B
value accuracy is up to 0.5%.
●The packaging method and results of its products determine its
fast response speed and high sensitivity.
●Due to its small size and light weight.
●The resistance decreases with increasing temperature, also known
as linear negative temperature coefficient thermistor.
●Due to the use of DHD, mechanical strength is guaranteed.
●No leads, easy to install through SMT automation
Scope of application
●Office automation equipment (such as laptops, copiers, printers,
etc.)
●Air conditioning heating and cooling appliances.
●Digital devices (mobile phones, PDAs, etc.)
●LED lighting, lithium battery temperature protection, mobile phone
rechargeable batteries (lithium batteries, nickel-metal hydride
batteries, etc.).
●Hydraulic sensors, medical equipment, electronic cigarettes.
●Temperature compensation of instrument coils, integrated circuits,
and quartz crystal oscillators
Product Specifications
1.Scope
This specification deals with shape, dimensions, characteristics,
inspection standard etc.
2.Specifications
| 103-3435-1 |
| NTC Thermistor | Resistance value | B value |
| 10 kΩ | ±1% | 3435 | ±1% | B25/50 |
3.Shape and dimension(Unit:mm)
4. Specifications:
example:
LK---MELF- 233- 4200 - 1
—— ——— ——— — —
① ② ③ ④ ⑤
Among them, ① represents Linkun Electronic Technology Co., Ltd.
②Indicates NTC thermistor with glass seal.
③Standard resistance value at 25°C (R25°C) For example: 233 means
R25°C is 23KΩ.
④B value (B25/50°C) For example: 4200 means B25/50°C is 4200K.
⑤ R25°C resistance value accuracy: 1 (±1%), 2 (±2%), 3 (±3%), 5(±5%)
5.Electrical characteristics
| Item
| Symbol | Test Condition
| Min.
| Nor.
| Min.
| Unit
|
| a | Resistance at 25°C
| R25 | 25±0.05°C | 9.9 | 10 |
10.1
| kΩ |
| b | Bvalue
| B25/50 |
| 3400.7 | 3435 | 3469.4 | k |
| c | Insulation resistance
| / | 500VDC | 100 | / | / | MΩ |
| d | Thermal time constant
| τ | in still air
| / | / | 8~12 | sec |
| e | Thermal dissipation constant
| δ | in still air
| 1.4 | / | / | mw/°C |
| f | Operating temperature range
| / | / | -50 | / | 300 | °C |
6.Reliability
| Item
| Specification
| Method of Examination
|
| 6.1 | high Temp. storage | *ΔR25/ R25≤±2% | After storeage at 250°C for 1000hrs
|
| 6.2 | Low Temp. storage
| After storeage at -40°C for 1000hrs
|
| 6.3 | High temperature and humidity | After storeage at 60°C 95%RH for 1000hrs
|
| 6.4 | Thermal shock
| *ΔR25/ R25≤±2%
| 100 cycles of following sequence -40°C 10min.---5min. room temp. ---200°C 10min.---5 min. room temp.
|
| 6.5 | Vibration
| * no visible damage
*ΔR25/ R25≤±2% | After vibrate test , Frequence 10-500Hz 15min.max amplitude 1.5mm
,in X and Y directions
|
| 6.6 | Pulling
| * no visible damage
*ΔR25/ R25≤±2% | After applling a force of 5N in the axial direction of thermistor,
and maintain the force for 60sec. |
| 6.7 | Fall down
| * no visible damage
*ΔR25/ R25≤±2% | After dropped freely onto wood floor from 1 meter height for 10
times
|
7.Outgoing Inspection
7.1 The product shall be inspected at every delivery lot inspection
items, sampling quantities and sampling acceptable standard are as
follows.
Inspection Item
| Sampling acceptable Standard
| Remarks
|
Resistance value
| N=20,Ac=0,Re=1 | 4(a) |
B value
| N=10,Ac=0,Re=1 | 4(b) |
Insulation Resistance
| N=5,Ac=0,Re=1 | 4(c) |
Shape & dimensions
| N=5,Ac=0,Re=1 | 3 |
Appearance
| N=5,Ac=0,Re=1 | 3 |
7.2 Inspection data
Inspection data will be issued for pay upon request.
8.Packing
Packing shall be done not to cause damage or soil during delivery
9.Product List:
| Specification | R25℃
(KΩ) |
R25℃/50℃
(K)
| Dissipation coefficient(mW/℃) | Time constant
(S) | Range of working temperature
(℃) |
| MF59-202-3900-1 | 2K | 3900 |
2.1 mW/℃
in static air |
5～10S
in static air |
—50～+350℃ |
| MF59-502-4557-1 | 5K | 4557 |
| MF59-103-3380-1 | 10K | 3380 |
| MF59-153-3600-1 | 15K | 3600 |
| MF59-203-3850-1 | 20K | 3850 |
| MF59-303-3900-1 | 30K | 3900 |
| MF59-803-3500-1 | 80K | 3500 |
| MF59-104-4100-1 | 100K | 4100 |
| MF59-254-3950-1 | 250K | 3950 |
Note: NTC thermistors of various specifications can provide
products with different R value and B value accuracy according to
customer requirements
10.Precautions
1. LK-59 series thermistors are glass-sealed, please do not shake
or squeeze them to prevent the glass tube from breaking.
2. Do not test the LK 59 thermistor in the air. The temperature
difference in the air is large, and the measurement is very
inaccurate. It often produces a deviation of more than 1-2°C. It
must be measured with a high-precision constant temperature oil
tank. After entering the constant temperature oil tank, the
temperature of the constant temperature tank must be stable before
measurement.
3. The voltage should be as low as possible during measurement to
reduce the measurement error caused by NTC self-heating.
4. When measuring high temperature, it is necessary to use a
thermometer to correct and check the temperature of the constant
temperature
Product display:
tank.
