• 20mm NTC Power Thermistor 20D , Semiconductor Ceramic Element
20mm NTC Power Thermistor 20D , Semiconductor Ceramic Element

20mm NTC Power Thermistor 20D , Semiconductor Ceramic Element

Thông tin chi tiết sản phẩm:

Nguồn gốc: Dongguan，Guangdong,China
Hàng hiệu: UCHI
Chứng nhận: 5D-20
Số mô hình: UL.VDE.SGS.

Thanh toán:

Số lượng đặt hàng tối thiểu: 5000PCS
Giá bán: Negotiable
chi tiết đóng gói: Bulk/Ammo/Reel
Thời gian giao hàng: 3~5 working days
Điều khoản thanh toán: T/T,Paypal,Western Union,Money gram
Khả năng cung cấp: 8000,000,000PCS Per Month
Giá tốt nhất Tiếp xúc

Thông tin chi tiết
Điểm nổi bật:

ntc temperature sensor

,

power ntc thermistor

Mô tả sản phẩm

20mm NTC Power Thermistor 20D , Semiconductor Ceramic Element

 

Quick Detail:

 

• Small Size and fast response

• High Power handling capability

• Fast response to surge current

• High material constant (B value)

• Low residual resistance

• Wide operating temperature range -55 to +200C

• R25 allowable tolerance is ±20%

• Long-term Stability and Reliability

 

 

Description:

 

The MF72 power NTC thermistor is a kind of semiconductor ceramic element that mostly made from transition metal oxide material, and belongs to negative temperature thermistors. When you tune on an electrical equipment ,the surge current can be restrained by a power NTC thermistor connected in series with the power circuit .Because of the continuing action of current, temperature of power NTC thermistor raising, the resistance will rapidly drop to a small value, the consumed power can be ignored. So it can not affect normal operating current. Therefore, using power NTC thermistor is a most effectively amd most brief measure to restrain surge current, protecting electrical equipment from destruction.

 

 

Applications:

 

Can be installed into the power circuits of:

• Power supplies and inverters

• Uninterruptible Power Supplies

• Energy saving lamps

• Electronic Ballasts

• Filament Protection of various types of lamps

• Some types of heaters

• For higher power circuits ask about the MF73

 and MF74 series surge suppressors.

 

 

Specifications:

 

Part No.: MF72-5-D20MSSB

NTC THERMISTOR

5Ohm

Rev.: 1/A (2012.06.29)

  

1. APPEARANCE

  

 

1-1. Dimensions (mm)

 

 

           20mm NTC Power Thermistor 20D , Semiconductor Ceramic Element 0

 

1-2. Marking

■  NTC

5D-20

□No marking  

  

 

1-3.Coating

 

 □ No coating     

■      Coating

 

  

      

Material

      ■PF resin

      □Silicon

     □Epoxy

      □Others

 

 

Color

 □Green

 □Red

 □Tan

 ■Black

 □Blue

  

1-4. Leads

□Tin – plated copper wire

■Tin-plated steel wire

■Straight      □ Axis-formed

□In-Forming  □ No Lead

 

  

DMax: 22.0

TMax: 7.0

F: 7.5/10±1.0

  

d: 0.8/1.0±0.5

LMin: 29

 

  

2. MECHANICAL CHARACTERISTICS

  

Item

Specification

Test Conditions & Methods

  

2-1. Solder-ability

The terminals shall be uniformly tinned, and its area≥95%

 

Dipping theNTC terminals to a depth of 15mm in a soldering bath of 245±5℃ and to the place of 6mm far from NTC body for 3±0.5s (See IEC68-2-20 /GB2423.28 Ta )

  

 2-2. Resistance To Soldering Heat

 

No visible mechanical damage.

ΔR/RN ≤20%

(ΔR =∣RN-RN'∣)

 

Dipping the NTC terminals to a depth of 15mm in a soldering bath of 260±5℃ and to the place for 6mm below from NTC body for 3±0.5s.After recovering4-5h under 25±2℃. The rated zero power resistance value RN' shall be measured.

(See IEC68-2-20 /GB2423.28 Tb)

 

  

 

Part No.: MF72-5-D20MSSB

NTC THERMISTOR

5Ohm

Rev.: 1/A (2012.06.29)

 2-3. Strength of lead terminal

 

No break out

ΔR/RN ≤20%

(ΔR =∣RN-RN'∣)

Fasten the body and apply a force gradually to each lead until 10N and then keep for 10sec, Hold body and apply a force to each lead until　 90°slowly at 5N in the direction of lead axis and then keep for 10sec, and do this in the opposite direction repeat for other terminal. After recovering 4~5h under 25±2℃, the rated zero power resistance value RN' shall be measured.

 (See IEC68-2-21/GB2423.29 Ua / Ub)

3.ELECTRICAL CHARACTERISTICS

3-1.Test Conditions & Method

Items

Spec.

Test Conditions & Methods

3-1-1.Rated Zero-Power Resistance

RN (Ohm)

   5±20%

Ambient temp. Range:25℃±2℃(TA).

Testing voltage: 1.5VDC

After placing for 1~2 hours under TA, the resistance value shall be measured.

 

3-1-2.Thermal Dissipation Constant

 (mW/°C)

25

The thermal dissipation constant(d) could be calculated by the ratio of a change in power dissipation(DP) of the thermistor to a change in temperature(DT) of the thermistor at a specified ambient temperature

 

3-1-3.Thermal Time Constant

t (s)

103

The time(t) shall be measured within which the temperature change of NTC thermistor is reached at 63.2% of the ambient temperature change under zero power condition

 

3-1-4.Material Constant

B (°K)

3000±5%

B=T1T2/( T2- T1) ×Ln (R1/R2)

R1 , R2 is zero-power resistance at T1 , T2

T1 = 298.15°K(25°C)  T2 = 323.15°K(50°C)

                 

 

 

Part No.: MF72-5-D20MSSB

NTC THERMISTOR

5Ohm

Rev.: 1/A (2012.06.29)

3-1-5.Max.Steady State Current

(A)

             8

No visible mechanical damage.

ΔRN / RN ≤20%

(ΔR =∣RN-RN'∣)

Ambient temp. Range:25℃±2℃.

Testing Current :7A

 

 

4. Reliability Test

Items

Spec.

Test Conditions & Methods

*4-1. Temp. Cycling Testing  

    

 

 

No visible mechanical damage.

 

ΔRN / RN ≤20%

(ΔR =∣RN-RN'∣)

 

Ta:-40±3℃/ 30min→25±2℃/ 5min→ Tb:160±3℃/ 30min→25±2℃/ 5min      Cycles: 5times

After recovering 4~5 h under 25±2℃, the rated zero power resistance value RN' shall be measured.

*4-2. Electrical Cycling Testing

    

Ambient temp. Range:25℃±2℃.

Cycles: 2,000times     On / Off: 5 s / 55 s

Test Current: 7A

After recovering 4~5h under 25±2℃, the rated zero power resistance value RN' shall be measured.

 

*4-3.LoadLife ( Endurance ) Testing

 

Ambient temp. Range:25℃±2℃; 7A/ 1,000±24h

After recovering 4~5 h under 25±2℃, the rated zero power resistance value RN' shall be measured.

 

*4-3. Humidity Testing

    

No visible mechanical damage.

 

ΔRN / RN ≤20%

(ΔR =∣RN-RN'∣)

Ambient temp. range : 40℃±2℃

R.H.:93±3% ,  Energized time:1000±24 h

After recovering 4~5 h under 25±2℃, the rated zero power resistance value RN' shall be measured.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Part No.: MF72-5-D20MSSB

NTC THERMISTOR

5W 

Rev.: 1/A (2012.06.29)

5. INSPECTION

5-1. Lot Inspection

Sampling with IEC410 / DIN ISO 2859-1 (GB/T2828.1-2003) ;  Testing with SPEC.NO.: WWSMF21-15-18.

Item

IL

AQL

 

Item

IL

AQL

Appearance

Ⅱ

0.65

Rated Zero-Power Resistance RN

Ⅱ

0.65

 

Soldering-ability

S-2

2.5

Max.Steady State Current (A)

S-2

2.5

 

 

 

 

 

 

5-2. Periodic Inspection

See the items with

 

6. NUMBERING SYSTEM AND PACKING

6-1. PART NUMBERING

 

MF72

-

5

-

D20

M

S

S

B

　       ①              ②              ③      ④      ⑤      ⑥      ⑦　　

 

① Series: MF72 - For limiting of inrush current

② Rated Zero Power Resistance: 5 - 5Ω

③ Disc. Diameter: D15 - 15mm    D11 - 11mm

④ Tolerance of Resistance:  M - ±20%   K - ±10%   

⑤ Shape of Leads: U - In-formed      S - Straight            

A - Axis Formed    N - No Leads

⑥ Coating Material :S - Silicone      N - No Coating

P - PF Resin     E - Epoxy

⑦ Packing Type :B - Bulk   A - Ammo  R - Reel

 

 

 

6-2.Lot Numbering

 

0

 

1

 

01

 

①          ②           ③

① Year of ex-factory  0: 2000 (1: 2001, …, 9: 2009)

② Month of ex-factory 1: January (2: Feb,…, 9: Sep, O: Oct, N: Nov, D: Dec).

③ Serial number of ex-factory in current month: 01～99: No. 01～99,  J0: No.100,  J1～J9: No.101～109,  K0:No.110,

K1～K9: No.111～119,  S0: No.190,  S1～S9: No.191～199,  T0: No.200, …
 
 

Part No.: MF72-5-D20MSSB

NTC THERMISTOR

5Ohm

Rev.: 1/A (2012.06.29)

6-3. Packing Type

■ Bulk       

□ Ammo     

□ Reel        

   

7. Operating Temperature Range:

-55 ~ + 200℃

8. STORAGE CONDITIONS:

8-1.Temperature: -10℃～+40℃ 

8-2. Humidity: ≤70%RH

8-3. Term: ≤6 months (First-in/ First-out)

8-4. Place: 

Do not exposing the components to the following conditions, otherwise, it may result in deterioration of characteristics.

1) Corrosive gas or deoxidizing gas.

2) Flammable and explosive gases. 

3) Oil, water and chemical liquid.

4) Under the sunlight. 

8-5. Handling after seal open: After unpacking of the minimum package, reseal it promptly or store it inside a sealed container with a drying agent.

 

9. WARNING  !

Do not apply the components under the following conditions, otherwise, it may result in deterioration of characteristics, destruction of components or in the worst case, to catching fire.

1) Exceeding Imax. 

2) Exceeding rated temperature range. 

3) Inferior thermal dissipation (Due to badly inferior thermal dissipation, some part of the components body will become overheated and then be damaged.)
 

 

Competitive Advantage:

 

  1. Factory supply directly
  2. Completed certificates such as UL,VDE,SGS,etc and high quality available
  3.  Quick delivery
  4. Best after-sales services
  5. OEM & ODM available

 

20mm NTC Power Thermistor 20D , Semiconductor Ceramic Element 1

Từ khóa:

power ntc thermistor

ntc thermistor assembly

ntc temperature sensor

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