Datasheet

ManualsBrandsLittelfuse ManualsFuses & Fuse AccessoriesResettable SMD Fuse 24V 1.5A

Revised: July 12, 2010

POLYFUSE

Resettable PTCs

1812L Series

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

hold

(A)

trip

(A)

max

(Vdc)

max

(A)

typ.

(W)

Max. Time To Trip Resistance Agency Approvals

Current

(A)

Time

(Sec.)

min

(Ω)

1max

(Ω)

1812L010 LF010 0.10 0.30 30 100 0.8 0.50 1.50 1.600 15.000

1812L014 LF014 0.14 0.34 60 10 0.8 1.50 0.15 1.500 6.000

1812L020 LF020 0.20 0.40 30 100 0.8 8.00 0.02 0.800 5.000

1812L035/30 LF035-30 0.35 0.75 30 100 0.8 8.00 0.02 0.800 5.000

1812L050

LF050 0.50 1.00 15 100 0.8 8.00 0.15 0.150 1.000

1812L050/30 LF050-30 0.50 1.00 30 100 0.8 8.00 0.15 0.150 1.000

1812L075

LF075 0.75 1.50 13.2 100 0.8 8.00 0.20 0.100 0.450

1812L075/24 LF075-24 0.75 1.50 24 100 0.8 8.00 0.20 0.110 0.290

1812L075/33 LF075-33 0.75 1.50 33 20 0.8 8.00 0.20 0.110 0.400

1812L110

LF110 1.10 2.20 6 100 0.8 8.00 0.30 0.040 0.210

1812L110/16 LF110-16 1.10 1.95 16 100 0.8 8.00 0.30 0.060 0.180

1812L110/24 LF110-24 1.10 1.95 24 20 0.8 8.00 0.50 0.060 0.200

1812L110/33 LF110-33 1.10 1.95 33 20 0.8 8.00 0.50 0.060 0.200

1812L125

LF125 1.25 2.50 15 100 0.8 8.00 0.40 0.050 0.250

1812L125/6 LF125-6 1.25 2.50 6 100 0.8 8.00 0.40 0.050 0.140

1812L125/16 LF125-16 1.25 2.50 16 100 0.8 8.00 0.40 0.050 0.140

1812L150

LF150 1.50 3.00 8 100 0.8 8.00 0.30 0.040 0.110

1812L150/12 LF150-12 1.50 3.00 12 100 0.8 8.00 0.50 0.040 0.110

1812L150/24 LF150-24 1.50 3.00 24 20 0.8 8.00 1.50 0.040 0.120

1812L160

LF160 1.60 2.80 8 100 0.8 8.00 1.00 0.030 0.100

1812L160/12 LF160-12 1.60 2.80 12 100 0.8 8.00 1.00 0.030 0.100

1812L200TH

2,3

LF200 2.00 3.50 8 100 0.8 8.00 2.00 0.020 0.070

1812L260TH

2,3

LF260 2.60 5.00 8 100 0.8 8.00 2.50 0.015 0.047

1812L260/12 LF260-12 2.60 5.00 12 100 0.8 8.00 5.00 0.015 0.055

1812L300 LF300 3.00 5.00 6 100 0.8 8.00 4.00 0.012 0.040

Description

Applications

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for motherboards and

peripherals

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t1$*DBSET

t(BNFDPOTPMFQPSU

protection

Agency Approvals

AGENCY AGENCY FILE NUMBER

E183209

R50119118

Features

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and halogen-free

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t$PNQBDUEFTJHO

t-PXSFTJTUBODF

t-PXQSPmMF

t$PNQBUJCMFXJUIIJHI

temperature solders

hold

= Hold current: maximum current device will pass without tripping in 20°C still air.

trip

= Trip current: minimum current at which the device will trip in 20°C still air.

max

= Maximum voltage device can withstand without damage at rated current (I max)

max

= Maximum fault current device can withstand without damage at rated voltage (V

max

)

= Power dissipated from device when in the tripped state at 20°C still air.

min

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

typ

= Typical resistance of device in initial (un-soldered) state.

1max

= Maximum resistance of device at 20°C measured one hour after tripping or reﬂow

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.

Summary of content (6 pages)

PAGE 1
POLYFUSE® Resettable PTCs Surface Mount > 1812L Series 1812L Series Description The 1812L Series PTC provides surface mount overcurrent protection for applications where resettable protection is desired.
PAGE 2
POLYFUSE® Resettable PTCs Surface Mount > 1812L Series Temperature Rerating Ambient Operation Temperature -40°C -20°C 0°C 23°C 0.16 0.23 0.29 0.50 0.77 0.77 1.15 1.06 1.10 1.59 1.58 1.55 1.55 2.00 2.00 2.00 2.06 2.04 2.05 2.20 2.20 2.60 3.40 3.40 4.13 0.14 0.19 0.26 0.45 0.68 0.68 1.01 0.95 1.00 1.43 1.43 1.40 1.40 1.75 1.75 1.75 1.93 1.88 1.87 2.06 2.06 2.44 3.16 3.16 3.75 0.12 0.17 0.23 0.40 0.59 0.59 0.88 0.84 0.88 1.26 1.27 1.25 1.25 1.52 1.52 1.52 1.79 1.68 1.67 1.91 1.91 2.22 3.00 3.00 3.30 0.
PAGE 3
POLYFUSE® Resettable PTCs Surface Mount > 1812L Series 0.75A/24V 1.10A/33V 1.10A/16V 1.25A/6V 1.50A/24 1.60A 1.60A/12V 0.10A 0.14A 0.20A 0.35A/30 0.50A, 0.50A/30 0.75A 0.75A/33V 1.10A 1.10A/24V 1.25A, 1.25A/16 1.50A 1.50A/12V 2.00A 2.60A, 2.60A/12V 3.00A Average Time Current Curves 1812L 100 Time in Seconds Time in Seconds 100 10 10 1 1 0.10 0.1 1812L 1000 1812L Series 1000 1 10 0.10 0.
PAGE 4
POLYFUSE® Resettable PTCs Surface Mount > 1812L Series Dimensions MARKING CODE VARIES WITH AMPERAGE AND VOLTAGE RATING (See Electrical Characteristics Table) SHOWN ARE: - 1.1A/6V RATING (LEFT) - 1.1A/33V RATING (RIGHT) C A Top View 110 Bottom View 110 D 110 -33 B 3.45 mm (.135”) Pad Layout E Inches 3.15 mm (.124”) 1.78mm (.
PAGE 5
POLYFUSE® Resettable PTCs Surface Mount > 1812L Series Part Ordering Number System 1812 L xxx /xx TH Y R HF HALOGEN FREE PRODUCT INDICATOR Required for some items. See Packaging section. PACKAGING STYLE R: Tape & Reel QUANTITY CODE: M=1000 D=1500 P or Z =2000 LOW PROFILE DEVICE INDICATOR (Required, for L200 and L260 device orders only. Refer to “C” in Dimensions section.) SPECIAL VOLTAGE RATING ITEM (Not applicable to all parts.
PAGE 6
POLYFUSE® Resettable PTCs Surface Mount > 1812L Series Tape and Reel Speciﬁcations TAPE SPECIFICATIONS: EIA-481-1 (mm) 1812L020 1812L035/30 1812L050 1812L075 1812L110 1812L125/6 1812L150 1812L160 1812L200TH 1812L010 1812L014 1812L050/30 1812L075/24 1812L075/33 1812L110/16 1812L110/24 1812L125 1812L125/16 1812L150/12 1812L160/12 1812L260TH 1812L110/33 1812L150/24 1812L260/12 1812L300 W 12.00+0.30-0.10 12.00+/- 0.30 12.00+/- 0.30 H 16.0+/- 0.2 F 5.50+/- 0.05 5.50+/- 0.05 5.50+/- 0.05 W 13.