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SMD1812

产品型号:


产品特点

2920 系列提供微型 suSrace mount 可复位过流保护具有从 0.3A 到 7.0A 的保持电流。 该系列适用于广泛的在空间有限的现代电子产品中的应用。
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Positive Temperature Coefficient (PTC) Data Sheet

 

Description

 

The 1812 series provides surface mount resettable overcurrent protection with holding current from 0.1A to 9.0A. This series offers complete portfolio in terms of holding current and working voltage, and is suitable for wide range of application.

 

Features

 

■ RoHS compliant and lead-free

 Halogen-free

■ Compact design saves board space

 Low profile

 Fast response to fault current

 Compatible with high temperature solders

 

Applications

 

 USB hubs, ports and peripherals

 Set-top-box and HDMI

 Game console port protection

 Motherboard USB & IEEE 1394 protection

 Optical disk drives

 General electronics

 

 

Electrical Characteristics

 

Part

Number

Ihold

(A)

Itrip

(A)

Vmax

(Vdc)

Imax

(A)

Pd typ. 

(W)

Maximum

Time To Trip

Resistance

Time

(Sec.)

Current

(A)

Rmin

(Ω)

R1max

(Ω)

SMD1812SR010

0.10

0.30

30

100

0.8

1.50

0.50

0.750

15.000

SMD1812SR010/60

0.10

0.30

60

100

0.8

1.50

0.50

0.750

15.000

SMD1812SR014

0.14

0.40

60

100

0.8

0.02

8.00

0.350

5.000

SMD1812SR020

0.20

0.40

30

100

0.8

0.02

8.00

0.350

5.000

SMD1812SR020/60

0.20

0.40

60

100

0.8

0.02

8.00

0.350

5.000

SMD1812SR030

0.30

0.60

30

100

0.8

0.10

8.00

0.250

3.000

SMD1812SR030/60

0.30

0.60

60

100

0.8

0.10

8.00

0.250

3.000

SMD1812SR050

0.50

1.00

15

100

0.8

0.15

8.00

0.150

1.400

SMD1812SR050/33

0.50

1.00

33

100

0.8

0.15

8.00

0.150

1.400

SMD1812SR050/60

0.50

1.00

60

100

0.8

0.15

8.00

0.150

1.400

SMD1812SR075

0.75

1.50

13.2

100

0.8

0.20

8.00

0.090

0.450

SMD1812SR075/24

0.75

1.50

24

100

0.8

0.20

8.00

0.090

0.450

SMD1812SR075/33

0.75

1.50

33

100

0.8

0.20

8.00

0.090

0.450

SMD1812SR110

1.10

1.95

8

100

0.8

0.50

8.00

0.050

0.250

SMD1812SR110/16

1.10

1.95

16

100

0.8

0.50

8.00

0.050

0.250

SMD1812SR110/24

1.10

1.95

24

100

0.8

0.50

8.00

0.050

0.250

SMD1812SR110/33

1.10

1.95

33

100

0.8

0.50

8.00

0.050

0.250

SMD1812SR125/8

1.25

2.50

8

100

0.8

0.40

8.00

0.050

0.250

SMD1812SR125/16

1.25

2.50

16

100

0.8

0.40

8.00

0.050

0.250

SMD1812SR150

1.50

3.00

8

100

0.8

0.50

8.00

0.040

0.160

SMD1812SR150/16

1.50

3.00

16

100

0.8

0.50

8.00

0.040

0.160

SMD1812SR150/24

1.50

3.00

24

100

0.8

0.50

8.00

0.040

0.160

SMD1812SR200

2.00

4.00

8

100

0.8

2.00

8.00

0.020

0.100

SMD1812SR260

2.60

5.00

8

100

0.8

2.50

8.00

0.015

0.050

SMD1812SR300

3.00

6.00

6

100

2.0

4.00

10.0

0.008

0.030

SMD1812SR350

3.50

7.00

6

100

2.0

4.00

10.0

0.005

0.025

SMD1812SR400

4.00

8.00

6

100

2.0

5.00

20.0

0.004

0.020

SMD1812SR450

4.50

9.00

6

50

2.0

5.00

22.5

0.004

0.015

SMD1812SR500

5.00

10.00

6

50

2.0

5.00

25.0

0.003

0.014

SMD1812SR550

5.50

11.00

6

50

2.0

5.00

27.5

0.002

0.012

SMD1812SR600

6.00

12.00

6

50

2.0

5.00

30.0

0.001

0.010

SMD1812SR650

6.50

13.00

6

50

2.0

5.00

32.5

0.001

0.009

SMD1812SR700

7.00

14.00

6

50

2.0

5.00

35.0

0.001

0.008

SMD1812SR750

7.50

15.00

6

50

2.0

5.00

37.5

0.0005

0.007

SMD1812SR800

8.00

16.00

6

50

2.0

5.00

40.0

0.0005

0.006

SMD1812SR900

9.00

18.00

6

50

2.0

5.00

45.0

0.0005

0.005

 

Note on Electrical Characteristics

 

 Vocabulary

·Ihold = Hold current: maximum current device will pass without tripping in 23℃ still air.

·Itrip = Trip current: minimum current at which the device will trip in 23℃ still air.

·Vmax = Maximum voltage device can withstand without damage at rated current (Imax)

·Imax = Maximum fault current device can withstand without damage at rated voltage (Vmax)

·Pd typ. = Typical power dissipated from device when in the tripped state at 23 still air.

·Rmin = Minimum resistance of device in initial (un-soldered) state.

·R1max = Maximum resistance of device at 23 measured one hour after tripping or reflow soldering of 260 for 20 sec.

 Value specified is determined by using the PWB with 0.030*1.5oz copper traces.

 Caution: Operation beyond the specified rating may result in damage and possible arcing and flame.

 Specifications are subject to change without notice.

 

Polymeric PTC Selecting Guide

 

 Determine the following operating parameters for the circuits:

·Normal operating current (Ihold)

·Maximum interrupt current (Imax)

·Maximum circuit voltage (Vmax)

·Normal operating temperature surrounding device (min/max)

 Select the device from factor and dimension suitable for the application

 Compare the maximum rating for Vmax and Imax of the PPTC device with the circuit in application and make sure the circuit’s requirement does not exceed the device rating.

 Check that PPTC devices trip time (time-to-trip) will protect the circuit.

 Verify that the circuit operating temperature is within the PPTC devices normal operating temperature range.

 Verify that performance and suitability of the chosen PPTC device in the application.
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WARNING

 Mechanical Stress

·PPTC devices will undergo a thermal expansion during fault condition. If PPTC devices are installed or placed in an application where the space between PPTC devices and the surrounding materials (e.g., covering materials, packaging materials, encapsulate materials and the like) is insufficient, it will cause an inhibiting effect upon the thermal expansion. Pressing, twisting, bending and other kinds of mechanical stress will also adversely affect the performance of the PPTC devices, and shall not be used or applied.

 Chemical Pollutants

·Silicone-based oils, oils, solvents, gels, electrolytes, fuels, acids, and the like will adversely affect the properties of PPTC devices, and shall not be used or applied.

 Electronic and Thermal Effect

·PPTC devices are secondary protection devices and are used solely for sporadic, accidental over-current or over-temperature error condition, and shall NOT be used if or when constant or repeated fault conditions (such fault conditions may be caused by,among others, incorrect pin-connection of a connector) or over-extensive trip events may occur.

·PPTC devices are different from fuses and, when a fault condition occurs, will go into high-resistance state and do not open circuit, in which case the voltage at such PPTC devices may reach a hazardous level.

·Operation over the maximum rating or other forms of improper use may cause failure, arcing, flame and/or other damage to the PPTC devices.

·Conductive material contamination, such as metal particle, may induce shortage, flame or arcing.

·Due to the inductance, the operation circuits may generate a circuit voltage (Ldi/dt) above the rated voltage of PPTC devices, which shall not be used under such circumstances.

General

·Customers shall evaluate and test the properties of PPTC devices independently to verify and ensure that their individual applications will be met.

·The performance of PPTC devices will be adversely affected if they are improperly used under electronic, thermal and/or mechanical procedures and/or conditions non-conformant to those recommended by manufacturer.

·Customers shall be responsible for determining whether it is necessary to have back-up, failsafe and/or fool-proof protection To avoid or minimize damage that may result from extra-ordinary, irregular function or failure of PPTC devices.

·Any and all responsibilities and liabilities are disclaimed if any item under this notice of warning is not complied with.

 

Thermal Derating Curve

 

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Thermal Derating Chart

Recommended Hold Current (A) at Ambient Temperature ()

 

Part

Number

Ambient Operation Temperature

-40

-20

0

23

40

50

60

70

85

SMD1812SR010

0.16

0.14

0.12

0.10

0.08

0.07

0.06

0.05

0.03

SMD1812SR014

0.23

0.19

0.17

0.14

0.12

0.10

0.09

0.08

0.06

SMD1812SR020

0.29

0.26

0.23

0.20

0.17

0.15

0.14

0.12

0.10

SMD1812SR030

0.44

0.39

0.35

0.30

0.26

0.23

0.21

0.18

0.15

SMD1812SR050

0.77

0.68

0.59

0.50

0.44

0.40

0.37

0.33

0.29

SMD1812SR075

1.10

1.00

0.88

0.75

0.66

0.60

0.56

0.47

0.36

SMD1812SR110

1.55

1.40

1.25

1.10

0.93

0.83

0.73

0.63

0.50

SMD1812SR125

2.00

1.75

1.52

1.25

1.00

0.95

0.90

0.75

0.53

SMD1812SR150

2.05

1.87

1.67

1.50

1.25

1.08

0.95

0.77

0.60

SMD1812SR160

2.10

1.96

1.88

1.60

1.26

1.12

0.98

0.84

0.63

SMD1812SR200

2.60

2.44

2.22

2.00

1.78

1.67

1.50

1.45

1.29

SMD1812SR260

3.90

3.42

2.96

2.60

2.33

2.07

1.94

1.35

1.00

SMD1812SR300

4.15

3.76

3.46

3.00

2.55

2.28

2.01

1.61

1.33

 

Average Time-Current Curve

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Average Time-Current Curve

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Physical Dimensions (mm)

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Part

Number

A

B

C

D

E

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

SMD1812SR010

4.37

4.73

3.07

3.41

0.40

1.25

0.30

1.20

0.15

0.65

SMD1812SR014

4.37

4.73

3.07

3.41

0.40

1.25

0.30

1.20

0.15

0.65

SMD1812SR020

4.37

4.73

3.07

3.41

0.40

1.25

0.30

1.20

0.15

0.65

SMD1812SR030

4.37

4.73

3.07

3.41

0.40

2.00

0.30

1.20

0.15

0.65

SMD1812SR050

4.37

4.73

3.07

3.41

0.40

1.25

0.30

1.20

0.15

0.65

SMD1812SR075

4.37

4.73

3.07

3.41

0.40

1.25

0.30

1.20

0.15

0.65

SMD1812SR110

4.37

4.73

3.07

3.41

0.40

2.00

0.30

1.20

0.15

0.65

SMD1812SR125

4.37

4.73

3.07

3.41

0.40

1.25

0.30

1.20

0.15

0.65

SMD1812SR150

4.37

4.73

3.07

3.41

0.40

1.25

0.30

1.20

0.15

0.65

SMD1812SR200

4.37

4.73

3.07

3.41

0.40

2.10

0.30

1.20

0.15

0.65

SMD1812SR260

4.37

4.73

3.07

3.41

0.40

1.25

0.30

1.20

0.15

0.65

SMD1812SR300

4.37

4.73

3.07

3.41

0.40

1.25

0.30

1.20

0.15

0.65

 

 

Environmental Specifications

Operating / Storage temperature -40℃ to +85℃
Maximum Device Surface Temperature in Tripped State 125℃
Passive Aging

+85℃, 1000 hours

±50% typical resistance change

Humidity Aging

+85℃, 85%R.H. 1000 hours

±50% typical resistance change

Thermal Shock

MIL-STD-202, Method 107G

+85℃/-40℃ 20 times

-50% typical resistance change

Solvent Resistance

MIL-STD-202, Method 215

No change

Vibration

MIL-STD-883C, Method 2007.1, Condition A

No change

Moisture Level Sensitivity Level 1, J-STD-020C

 

 

Packaging Quantity and Marking

 

Recommended Pad Layout (mm)

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Part Number

Marking

Quantity

SMD1812SR010

010

2000

SMD1812SR010/60

010

2000

SMD1812SR014

014

2000

SMD1812SR020

020

2000

SMD1812SR020/60

020

2000

SMD1812SR030

030

2000

SMD1812SR030/60

030

2000

SMD1812SR050

050

2000

SMD1812SR050/33

050

2000

SMD1812SR050/60

050

2000

SMD1812SR075

075

2000

SMD1812SR075/24

075

2000

SMD1812SR075/33

075

2000

SMD1812SR110

110

1500

SMD1812SR110/16

110

1500

SMD1812SR110/24

110

1500

SMD1812SR110/33

110

1500

SMD1812SR125/8

125

1500

SMD1812SR125/16

125

1500

SMD1812SR150

150

1500

SMD1812SR150/16

150

1500

SMD1812SR150/24

150

1500

SMD1812SR200

200

1500

SMD1812SR260

260

1500

SMD1812SR300

300

1500

◎ 8mm tape on 7 inch reel per EIA-481 (equivalent to IEC286, part 3)

 

Physical Specifications

Terminal Material Solder-Plated Copper (Solder Material: Matte Tin (Sn))
Lead Solderability Meets EIA Specification RS186-9E, ANSI/J-STD-002 Category 3.

 

Packaging

 

Tape

 

 

 

 

 

 

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Symbol

Dimensions (mm)

 

 

 

W

12.00±0.30

12.00±0.30

12.00±0.10

F

5.50±0.05

5.50±0.05

5.50±0.05

E

1.75±0.10

1.75±0.10

1.75±0.10

D0

1.55±0.05

1.55±0.05

1.55±0.05

D1

1.55(MIN)

1.50±0.10

1.55(MIN)

P0

4.00±0.10

4.00±0.10

4.00±0.10

P1

8.00±0.10

8.00±0.10

8.00±0.10

P2

2.00±0.05

2.00±0.05

2.00±0.05

A0

3.58±0.10

3.50±0.10

3.58±0.10

B0

4.93±0.10

4.85±0.10

4.93±0.10

T

0.25±0.10

0.25±0.10

0.25±0.10

K0

0.87±0.10

1.25±0.10

2.10±0.10

Leader min.

390

390

390

Trailer min.

160

160

160

Reel

 

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C

Φ178.0±1.0

D

Φ60.2±0.5

H

16.0±0.5

W

13.2±1.5

 

Part Number System

 

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