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©2009 Littelfuse, Inc.

Revised: December 2, 2009

Surface Mount > 1812L Series

1812L Series

Specifications are subject to change without notice.

Please refer to www.littelfuse.com/series/1812L.html for current information.

1812L Series

The 1812L Series PTC provides surface mount overcurrent

protection for applications where resettable protection is

desired.

Electrical Characteristics

Part Number

Marking

I

hold

(A)

I

trip

(A)

V

max

(Vdc)

I

max

(A)

P

d

max.

(W)

Maximum Time

To Trip

Resistance

Agency

Approvals

Current

(A)

Time

(Sec.)

R

min

(Ω)

R

1max

(Ω)

1812L010

LF010

0.10

0.30

30

100

0.8

0.50

1.50

1.600

15.000

XX

1812L014

LF014

0.14

0.34

60

10

0.8

1.50

0.15

1.500

6.000

XX

1812L020

LF020

0.20

0.40

30

100

0.8

8.00

0.02

0.800

5.000

XX

LF050

0.50

1.00

15

100

0.8

8.00

0.15

0.150

1.000

XX

1812L050/30

LF050-30

0.50

1.00

30

100

0.8

8.00

0.15

0.150

1.000

XX

LF075

0.75

1.50

13.2

100

0.8

8.00

0.20

0.100

0.450

XX

1812L075/24

LF075-24

0.75

1.50

24

100

0.8

8.00

0.20

0.110

0.290

XX

1812L075/33

LF075-33

0.75

1.50

33

20

0.8

8.00

0.20

0.110

0.400

XX

LF110

1.10

2.20

6

100

0.8

8.00

0.30

0.040

0.210

XX

1812L110/16

LF110-16

1.10

1.95

16

100

0.8

8.00

0.30

0.060

0.180

XX

1812L110/24

LF110-24

1.10

1.95

24

20

0.8

8.00

0.50

0.060

0.200

XX

1812L110/33

LF110-33

1.10

1.95

33

20

0.8

8.00

0.50

0.060

0.200

XX

LF125

1.25

2.50

15

100

0.8

8.00

0.40

0.050

0.250

XX

1812L125/6

LF125-6

1.25

2.50

6

100

0.8

8.00

0.40

0.050

0.140

XX

LF125-16

1.25

2.50

16

100

0.8

8.00

0.40

0.050

0.140

XX

LF150

1.50

3.00

8

100

0.8

8.00

0.30

0.040

0.110

XX

1812L150/12

LF150-12

1.50

3.00

12

100

0.8

8.00

0.50

0.040

0.110

XX

1812L150/24

LF150-24

1.50

3.00

24

20

0.8

8.00

1.50

0.040

0.120

XX

LF160

1.60

2.80

8

100

0.8

8.00

1.00

0.030

0.100

XX

1812L160/12

LF160-12

1.60

2.80

12

100

0.8

8.00

1.00

0.030

0.100

XX

LF200

2.00

3.50

8

100

0.8

8.00

2.00

0.020

0.070

XX

LF260

2.60

5.00

8

100

0.8

8.00

2.50

0.015

0.047

XX

1812L260/12

LF260-12

2.60

5.00

12

100

0.8

8.00

5.00

0.015

0.055

XX

1812L300

LF300

3.00

5.00

6

100

0.8

8.00

4.00

0.012

0.040

XX

Description

Applications

• Plug and play protection

for motherboards and

peripherals

• USB peripherals

• PCI cards

• Game console port

protection

Agency Approvals

AGENCY

AGENCY FILE NUMBER

E183209

R50119118

Features

• RoHS compliant, lead-free

• Fast response

• Compact design

• Low resistance

• Low-profile

• Compatible with high

temperature solders

I

I

V

I

P

R

R

R

soldering of 260°C for 20 sec.

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

1 Effective September 15, 2009 onward, all 1812L PTC products will be manufactured Halogen Free (HF). Existing Non-Halogen Free 1812L PTC products will continue to be

sold until supplies are depleted. Effective January 1, 2010, all 1812L PTC product will be manufactured and sold as Halogen Free by default, and the “HF” part number suffix

code will be discontinued -- Refer to Part Ordering Number System and Packaging Options sections for additional information.

2 Some older references to these devices may include “–C“ in the Part Number. The “–C“ should be omitted when placing new orders for the device.

3 Part numbers ending in “TH” refer to new lower profile devices. For these items the “TH” suffix must be included in the ordering instructions.

Please refer also to the Dimensions and Part Ordering Number System sections of this document for additional information. Orders for the original thicker product (No TH in

part number) may be accepted in some instances through October 31, 2009. Please contact Littelfuse for additional information or arrangements.