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250V 800mA Resettable Fuse SMD PPTC Devices For Computer , Peripherals

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Guangdong Uchi Electronics Co.,Ltd

City: dongguan

Province/State:guangdong

Country/Region:china

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250V 800mA Resettable Fuse SMD PPTC Devices For Computer , Peripherals

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Place of Origin Dongguan,Guangdong,China
Brand Name UCHI
Certification ROHS,SGS,UL,VDE
Model Number LT250800
Minimum Order Quantity 5000PCS
Price Negotiable
Packaging Details Bulk 500PCS/BAG
Delivery Time 3~5 working days
Payment Terms T/T,Paypal,Western Union,Money gram
Supply Ability 8000,000,000PCS Per Month
Detailed Product Description

250V 800mA Resettable Fuse SMD PPTC Devices For Computer , Peripherals

 

Quick Detail:

 

■ Radial leaded devices
■ Fast tripping resettable PTCs
■ Binned and sorted narrow resistance ranges available
■ RoHS compliant
 

 

Description:

 

The Cooper Bussmann family of PolyTron™ resettable PPTCs is ideally suitedfor protecting applications sensitive to high ambient operating temperatures orsubject to frequent overcurrent conditions.PPTCs operate as a positive temperature coefficient device. High temperatures and excessive current will cause the device resistance to increase until it limits the unsafe current level.Upon reaching the design temperature/current limit, the PPTC will effectively“open” the circuit to provide protection from the overcurrent or elevated ambient temperature condition.Once the fault is removed or the ambient temperature cools, the PPTC will automatically “reset” and conduct safe current levels again, allowing current to flow through the circuit.PPTCs are commonly used in applications where constant uptime is required and/or in circuits not easily accessible by a user or service technician.Available in surface mount and radial packages, Cooper Bussmann resettable PPTCs help improve the safety and reliability of customer equipment worldwide.

 

 

Applications:

 

■ Customer Premise Equipment (CPE)
■ Central Offi ce / Telecom Centers (CO)
■ Access equipment

 

 

Specifications:

 

Product Dimensions in Millimeter 

 

 

 

 

 

 

 

 

 

Part Number

A

B

C

D

E

Lead

Max

Max

Max

Min

Typ.

Style

Size(Φ)

LT250-020

7.4

12.7

4.5

7.6

5.1

1

CP 0.5

     LT250-040

5.8

9.9

4.5

7.6

5.1

1

 

LT250-055

5.8

9.9

4.6

4.7

5.1

1

0.6

LT250-080

5.8

9.9

4.6

4.7

5.1

1

0.6

LT250-080U

4.8

9.3

3.8

4.7

5.1

1

0.6

LT250-110

6.5

11.0

4.6

4.7

5.1

2

0.6

LT250-110U

6.0

10.0

3.8

4.7

5.1

2

0.6

LT250-120

6.5

11.0

4.6

4.7

5.1

2

0.6

LT250-120U

6.0

10.0

3.8

4.7

5.1

2

0.6

LT250-145

6.5

11.0

4.6

4.7

5.1

2

0.6

LT250-145U

6.0

10.0

3.8

4.7

5.1

2

0.6

LT250-180

11.0

13.6

4.6

4.7

5.1

2

0.6

LT250-180U

10.4

12.6

3.8

4.7

5.1

2

0.6

 

 

Electrical Characteristics at 25 ℃                                                               

Part Number

Ih(mA)

Vmax(V)

Imax(A)

Rmax(Ω)

Rmin(Ω)

Pdtyp(W)

LT250-060

60

250

3

45.0

20.0

1.0

LT250-080

80

250

3

22.0

10.0

1.0

LT250-090

90

250

3

20.0

7.0

1.0

LT250-110

110

250

3

12.0

6.0

1.0

LT250-120

120

250

3

10.5

6.0

1.0

LT250-145

145

250

3

6.5

3.5

1.0

LT250-180

180

250

10

3.0

1.0

1.0

LT250-200

200

250

10

6.0

3.0

1.0

LT250-400

400

250

10

3.0

1.0

1.0

LT250-600

600

250

10

2.0

0.6

1.0

LT250-800

800

250

10

1.0

0.4

1.0

LT250-030

30

250

1

90.0

35.0

1.0

LT250-040

40

250

3

65.0

27.0

1.0

 

IH=Hold current: maximum current at which the device will not trip at 25℃ still air.

IT=Trip current: minimum current at which the device will always trip at 25℃ still air.

Vmax=Maximum voltage device can withstand without damage at rated current.

Imax=Maximum fault current device can withstand without damage at rated voltage.

Ttrip=Maximum time to trip(s) at assigned current.

Pdtyp=Typical power dissipation: typical amount of power dissipated by the device when in state air environment.

Rmin=Minimum device resistance at 25℃ prior to tripping.

Rmax=Maximum device resistance at 25℃ prior to tripping.                                                    

 

 

Thermal Derating [ Hold Current (A) at Ambient Temperature (℃)]                                                               

 

 Part Number

Maximum Ambient Operating Temperature (℃)

-40

-20

0

25

40

50

60

70

85

  LT250-080

0.124

0.110

0.095

0.080

0.066

0.059

0.051

0.044

0.033

  LT250-080U

0.124

0.110

0.095

0.080

0.066

0.059

0.051

0.044

0.033

  LT250-110

0.171

0.151

0.131

0.110

0.091

0.081

0.071

0.061

0.046

  LT250-110U

0.171

0.151

0.131

0.110

0.091

0.081

0.071

0.061

0.046

  LT250-120

0.191

0.170

0.148

0.120

0.104

0.093

0.082

0.071

0.055

  LT250-120U

0.191

0.170

0.148

0.120

0.104

0.093

0.082

0.071

0.055

  LT250-145

0.225

0.199

0.172

0.145

0.119

0.106

0.093

0.080

0.060

  LT250-145U

0.225

0.199

0.172

0.145

0.119

0.106

0.093

0.080

0.060

  LT250-180

0.269

0.240

0.211

0.180

0.153

0.138

0.123

0.109

0.087

  LT250-180U

0.269

0.240

0.211

0.180

0.153

0.138

0.123

0.109

0.087

Reliability Test                                                                        

 

Test

Test Conditions

Accept/Reject Criteria

Resistance

In still air @ 25℃

Rmin≤R≤Rmax

Time to Trip

Specified current, Vmax, 25℃

T≤maximum Time to Trip

Hold Current

30min, at IH

No trip

Trip Cycle Life

Vmax, Imax, 100cycles

No arcing or burning

Trip Endurance

Vmax, 24hours

No arcing or burning

 

Typical Time-to-Trip Curves at 25 ℃                                                          

 

A = LT250-020/080U

B = LT250-110/0110U

C = LT250-120/120U

D = LT250-145/145U

E = LT250-180/180U

 

Package Information                                                                   

 

Bulk:

LT250-020 ~ LT250-040……………….1000 pcs per bag

LT250-055 ~ LT250-180……………….  500 pcs per bag

 

 

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

 

   

 
Product Tags: polyswitch resettable fuse   resettable fuse ptc  
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