1812L075/33DR Littelfuse Inc, 1812L075/33DR Datasheet - Page 2

• Manufacturer Part Number: 1812L075/33DR
• Description: PTC RESETTABLE 33V 750MA 1812L
• Manufacturer: Littelfuse Inc
• Series: POLYFUSE® 1812Lr

Specifications of 1812L075/33DR

• Package / Case: 1812 (4532 Metric)
• R Min/max: 0.110 ~ 0.400 Ohm
• Voltage - Max: 33V
• Time To Trip: 0.2s
• Current - Hold (ih) (max): 750mA
• Current - Trip (it): 1.5A
• Current - Max: 20A
• Hold Current: 0.75 Amp
• Trip Current: 1.5 Amps
• Current Rating (max): 20 Amps
• Resistance: 0.4 Ohms
• Maximum Voltage: 33 VoltsDC
• Termination Style: SMD/SMT
• Mounting Style: SMD/SMT
• Current Rating: 20 Amps
• Dimensions: 4.37 mm L x 3.07 mm W
• Operating Temperature Range: - 40 C to + 85 C
• Holding Current: 750mA
• Tripping Current: 1.5A
• Initial Resistance Max: 0.4ohm
• Operating Voltage: 33VDC
• Ptc Fuse Case: 1812
• External Depth: 1.55mm
• Initial Resistance Min: 0.11ohm
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 1812L075/33DR; F3355TR

*Note: Some devices in this product series may have “–C“ in the Part Number. The “–C“ should be omitted when placing orders for the device.
1812L Series
Temperature Rerating
Temperature Rerating Curve
Part Number*
1812L075/24
1812L075/33
1812L150/12
1812L150/24
1812L160/12
1812L110/16
1812L110/33
170%
150%
130%
110%
1812L050
1812L075
1812L125
1812L150
1812L160
1812L200
1812L260
1812L110
1812L125/6
90%
70%
50%
30%
10%
1812L020
1812L010
1812L014
-40 -30 -20
–C
–C
–C
–C
–C
–C
–C
–C
-10
0
-40°C
0.16
0.23
0.29
0.77
2.00
2.00
2.06
2.04
2.05
2.20
2.18
3.08
4.00
1.15
1.06
1.10
1.59
1.58
1.55
10
Temperature (°C)
20
30
POLYFUSE
-20°C
0.14
0.19
0.26
0.68
0.95
2.06
2.01
2.71
3.52
1.01
1.00
1.43
1.43
1.40
1.75
1.75
1.93
1.88
1.87
40
50
60
Surface Mount > 1812L Series
0.12
0.17
0.23
0.59
0.88
0.84
0.88
2.35
3.06
1.26
1.27
1.25
1.52
1.52
1.79
1.68
1.67
1.91
1.79
0°C
70
80 85
®
Revised: October 24, 2008
Resettable PTCs
Ambient Operation Temperature
23°C
0.14
0.20
0.50
0.75
0.75
0.75
2.00
2.60
0.10
1.10
1.10
1.10
1.25
1.25
1.50
1.50
1.50
1.60
1.60
The average time current curves and Temperature Rerating curve performance is affected
by a number or variables, and these curves provided as guidance only. Customer must
verify the performance in their application.
Hold Current (A)
Average Time Current Curves
40°C
0.08
0.44
0.65
0.60
0.66
0.95
0.95
0.93
2.34
0.12
0.17
1.00
1.00
1.28
1.25
1.25
1.36
1.34
1.80
100000
10000
1000
0.01
100
0.1
10
1
0.1
Please refer to www.littelfuse.com/series/1812L.html for current information.
50°C
0.07
0.40
0.60
0.55
0.60
0.87
0.85
0.83
0.95
0.95
2.08
0.10
0.15
1.08
1.60
1.10
1.10
1.17
1.16
Current in Amperes
1
Specifications are subject to change without notice.
60°C
0.06
0.09
0.37
0.55
0.50
0.56
0.80
0.77
0.73
0.90
0.90
0.95
0.14
1.02
1.00
1.09
1.07
1.50
1.95
10
70°C
0.05
0.08
0.12
0.33
0.49
0.45
0.47
0.71
0.71
0.63
0.75
0.75
0.80
0.80
0.77
0.85
0.83
1.07
1.39
©2008 Littelfuse, Inc.
1812L
85°C
0.03
0.06
0.10
0.29
0.43
0.37
0.36
0.60
0.58
0.50
0.53
0.53
0.68
0.60
0.60
0.72
0.60
0.80
1.04
100