The 1812L Series PTC provides surface mount overcurrent
protection for applications where resettable protection is
desired.
Features
• RoHS compliant, lead-free
and halogen-free
1
• Fast response
• Compact design
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E183209
R50119118
Applications
• Plug and play protection
for motherboards and
peripherals
• USB peripherals
• PCI cards
• Game console port
protection
Electrical Characteristics
I
hold
(A)
0.10
0.14
0.20
0.50
0.50
0.75
0.75
0.75
1.10
1.10
1.10
1.10
1.25
1.25
1.25
1.50
1.50
1.50
1.60
1.60
2.00
2.60
2.60
3.00
I
trip
(A)
0.30
0.34
0.40
1.00
1.00
1.50
1.50
1.50
2.20
1.95
1.95
1.95
2.50
2.50
2.50
3.00
3.00
3.00
2.80
2.80
3.50
5.00
5.00
5.00
V
max
(Vdc)
30
60
30
15
30
13.2
24
33
6
16
24
33
15
6
16
8
12
24
8
12
8
8
12
6
I
max
(A)
100
10
100
100
100
100
100
20
100
100
20
20
100
100
100
100
100
20
100
100
100
100
100
100
P
d
max.
(W)
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
Maximum Time
To Trip
Current
Time
(A)
(Sec.)
Resistance
R
min
(Ω)
R
1max
(Ω)
Agency
Approvals
Part Number
1812L010
1812L014
1812L020
1812L050
2
1812L050/30
1812L075
2
1812L075/24
1812L075/33
1812L110
2
1812L110/16
1812L110/24
1812L110/33
1812L125
2
1812L125/6
1812L125
/16
1812L150
2
1812L150/12
1812L150/24
1812L160
2
1812L160/12
1812L200TH
2,3
1812L260TH
2,3
1812L260/12
1812L300
Marking
LF010
LF014
LF020
LF050
LF050-30
LF075
LF075-24
LF075-33
LF110
LF110-16
LF110-24
LF110-33
LF125
LF125-6
LF125-16
LF150
LF150-12
LF150-24
LF160
LF160-12
LF200
LF260
LF260-12
LF300
0.50
1.50
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
8.00
1.50
0.15
0.02
0.15
0.15
0.20
0.20
0.20
0.30
0.30
0.50
0.50
0.40
0.40
0.40
0.30
0.50
1.50
1.00
1.00
2.00
2.50
5.00
4.00
1.600
1.500
0.800
0.150
0.150
0.100
0.110
0.110
0.040
0.060
0.060
0.060
0.050
0.050
0.050
0.040
0.040
0.040
0.030
0.030
0.020
0.015
0.015
0.012
15.000
6.000
5.000
1.000
1.000
0.450
0.290
0.400
0.210
0.180
0.200
0.200
0.250
0.140
0.140
0.110
0.110
0.120
0.100
0.100
0.070
0.047
0.055
0.040
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
I
hold
= Hold current: maximum current device will pass without tripping in 20°C still air.
I
trip
= Trip current: minimum current at which the device will trip in 20°C still air.
V
max
= Maximum voltage device can withstand without damage at rated current (I max)
I
max
= Maximum fault current device can withstand without damage at rated voltage (V
max
)
P
d
= Power dissipated from device when in the tripped state at 20°C still air.
R
min
= Minimum resistance of device in initial (un-soldered) state.
R
typ
= Typical resistance of device in initial (un-soldered) state.
R
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.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/1812L.html for current information.
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
SERIES
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. Refer to Electrical
Characteristics
Table
for additional information)
I
HOLD
HOLD CURRENT CODE
(Refer to Electrical Characteristics
Table)
L: LITTELFUSE SURFACE MOUNT PPTC
DEVICE SIZE CODE
(0.18 x 0.12 inch)
Packaging
Part Number
1812L010
1812L014
1812L020
1812L050
1812L050/30
1812L075
1812L75/24
1812L75/33
1812L110
1812L110/16
1812L110/24
1812L110/33
1812L125
1812L125/6
1812L125/16
1812L150
1812L150/12
1812L150/24
1812L160
1812L160/12
1812L200TH
1812L260TH
1812L260/12
1812L300
Ordering Number
1812L010DRHF
1812L010DR
1812L014DRHF
1812L014DR
1812L020PRHF
1812L020PR
1812L050PRHF
1812L050PR
1812L050/30PR
1812L075PRHF
1812L075PR
1812L075/24DRHF
1812L075/24DR
1812L075/33DRHF
1812L075/33DR
1812L110PRHF
1812L110PR
1812L110/16DRHF
1812L110/16DR
1812L110/24DR
1812L110/33MRHF
1812L110/33MR
1812L125DRHF
1812L125DR
1812L125/6PRHF
1812L125/6PR
1812L125/16DR
1812L150ZR
1812L150ZRHF
1812L150/12DRHF
1812L150/12DR
1812L150/24MRHF
1812L150/24MR
1812L160PRHF
1812L160PR
1812L160/12DRHF
1812L160/12DR
1812L200THPR
1812L260THDR
1812L260/12MR
1812L300MR
Halogen Free*
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Yes
Yes
Yes
I
hold
(A)
0.10
0.14
0.20
0.50
0.50
0.75
0.75
0.75
1.10
1.10
1.10
1.10
1.25
1.25
1.25
1.50
1.50
1.50
1.60
1.60
2.00
2.60
2.60
3.00
I
hold
Code
010
014
020
050
050
075
075
075
110
110
1.10
110
125
125
125
150
150
150
160
160
200
260
260
300
/12
/12
/24
/6
/16
/16
/24
/33
Tape and Reel
/24
/33
/30
Voltage
Option
Packaging
Option
Quantity
1500
1500
2000
2000
2000
2000
1500
1500
2000
1500
1500
1000
1500
2000
1500
2000
1500
1000
2000
1500
2000
1500
1000
1000
Quantity &
Packaging Code
DR
DR
PR
PR
PR
PR
DR
DR
PR
DR
DR
MR
DR
PR
DR
ZR
DR
MR
PR
DR
PR
DR
MR
MR
/12
*
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 “HF” part number suffix code will be discontinued.
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
