PTC Datasheet
RUEF Series
Radial Leaded
RoHS
Description
Littelfuse PolySwitch radial-leaded devices represent the most
comprehensive and complete set of PPTC products available in the
industry today. RUEF series is for balance of voltage rating (30V)
and hold current (up to 9A)
Features & Benefits
■ Resettable and single-use overcurrent devices
■ Wide range of form factor and termination methods
■ Devices compatible with high-volume electronics
assembly
■ RoHS compliant, Lead-Free and Halogen-Free
Applications
Additional Information
Resources
Accessories
■ Satellite video receivers
■ CD-ROMs
■ Industrial controls
■ Game machines
■ Transformers
■ Battery packs
■ Computer motherboards
■ Phones
■ Modems
■ Fax machines
■ USB hubs, ports and
peripherals
■ Analog and digital line cards
■ IEEE 1394 ports
Samples
■ Printers
Agency Approvals
Agency
Agency File Number
E74889
78165
72161784
Electrical Characteristics
IH
IT
(A)
(A)
(VDC)
(VAC RMS)
(DCADC)
RUEF090 RF2639-000
0.90
1.80
30
30
100
RUEF110
RF2624-000
1.10
2.20
30
30
100
RUEF135 RF2644-000
1.35
2.70
30
30
RUEF160 RF2645-000
1.60
3.20
30
30
Part
Number
Ordering Part
Number
VMAX
IMAX
PD Typ
(ACARMS)
Max Time-to-trip
RMIN
RMAX
R1MAX
(Ω)
(Ω)
(Ω)
Lead Size
(mm2/AWG)
(W)
(A)
(s)
70
0.60
4.50
5.9
0.070 0.120 0.22
0.205/24
70
0.70
5.50
6.6
0.070 0.100
0.205/24
100
70
0.80
6.75
7.3
0.040 0.080 0.13
0.205/24
100
70
0.90
8.00
8.0
0.030 0.070
0.205/24
RUEF – 30V
0.17
0.11
RUEF185 RF2559-000
1.85
3.70
30
30
100
70
1.00
9.25
8.7
0.030 0.060 0.09
0.205/24
RUEF250 RF2626-000
2.50
5.00
30
30
100
70
1.20
12.50
10.3
0.020 0.040 0.07
0.205/24
0.205/24
RF2611-000
3.00
6.00
30
30
100
70
2.00
15.00
10.8
0.020 0.050 0.08
RUEF400 RF2561-000
RUEF300
4.00
8.00
30
30
100
70
2.50
20.00
12.7
0.010 0.030 0.05
0.205/24
RUEF500 RF2643-000
5.00 10.00
30
30
100
70
3.00
25.00
14.5
0.010 0.030 0.05
0.520/20
RUEF600 RF2652-000
6.00 12.00
30
30
100
70
3.50
30.00
16.0
0.005 0.020 0.04
0.520/20
RUEF700 RF2653-000
7.00 14.00
30
30
100
70
3.80
35.00
17.5
0.005 0.020 0.03
0.520/20
RUEF800 RF2738-000
8.00 16.00
30
30
100
70
4.00
40.00
18.8
0.005 0.013
0.02
0.520/20
RUEF900 RF2723-000
9.00 18.00
30
30
100
70
4.20
45.00
20.0
0.005 0.010
0.02
0.520/20
Notes:
IH : Hold current: maximum current device will pass without interruption in 20°C still air.
IT : Trip current: minimum current that will switch the device from low resistance to
high resistance in 20°C still air.
VMAX : Maximum continuous voltage device can withstand without damage at rated current.
IMAX : Maximum fault current device can withstand without damage at rated voltage.
PD : Power dissipated from device when in the tripped state in 20°C still air.
RMIN : Minimum resistance of device as supplied at 20°C unless otherwise specified.
RMAX : Maximum resistance of device as supplied at 20°C unless otherwise specified.
R1MAX : Maximum resistance of device when measured one hour post reflow
(surface-mount device) or one hour post trip ( radial-leaded device) at 20°C unless
otherwise specified.
* Electrical characteristics determined at 25°C.
1
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 07/16/21
PTC Datasheet
RUEF Series
Radial Leaded
Temperature Rerating
Maximum Ambient Temperature
-40°C
-20°C
0°C
20°C
25°C
40°C
50°C
60°C
70°C
85°C
Hold Current (A)
RUEF – 30V
RUEF090
1.31
1.17
1.04
0.90
0.87
0.75
0.69
0.61
0.55
0.47
RUEF110
1.60
1.43
1.27
1.10
1.07
0.91
0.85
0.75
0.67
0.57
RUEF135
1.96
1.76
1.55
1.35
1.31
1.12
1.04
0.92
0.82
0.70
RUEF160
2.32
2.08
1.84
1.60
1.55
1.33
1.23
1.09
0.98
0.83
RUEF185
2.68
2.41
2.13
1.85
1.79
1.54
1.42
1.26
1.13
0.96
RUEF250
3.63
3.25
2.88
2.50
2.43
2.08
1.93
1.70
1.53
1.30
RUEF300
4.35
3.90
3.45
3.00
2.91
2.49
2.31
2.04
1.83
1.56
RUEF400
5.80
5.20
4.60
4.00
3.88
3.32
3.08
2.72
2.44
2.08
RUEF500
7.25
6.50
5.75
5.00
4.85
4.15
3.85
3.40
3.05
2.60
RUEF600
8.70
7.80
6.90
6.00
5.82
4.98
4.62
4.08
3.66
3.12
RUEF700
10.15
9.10
8.05
7.00
6.79
5.81
5.39
4.76
4.27
3.64
RUEF800
11.60
10.40
9.20
8.00
7.76
6.64
6.16
5.44
4.88
4.16
RUEF900
13.05
11.70
10.35
9.00
8.73
7.47
6.93
6.12
5.49
4.68
Temperature Rerating Curve
% of Rated Hold and Trip Current
200
150
100
50
0
-40
-20
0
20
40
60
80
Ambient Temperature (˚C)
2
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 07/16/21
PTC Datasheet
RUEF Series
Radial Leaded
Typical Time-to-Trip Curves at 20°C
100
H = RUEF400
I = RUEF500
J = RUEF600
K = RUEF700
L = RUEF800
M = RUEF900
A B C
D E
F G
H
I J
K LM
10
Time-to-Trip (s)
RUEF
A = RUEF090
B = RUEF110
C = RUEF135
D = RUEF160
E = RUEF185
F = RUEF250
G = RUEF300
1
M
0.1
L
K
J
I
H
G
F
E
D
0.01
1
A B
10
C
100
Fault Current (A)
Physical Specifications
Lead Material
RUEF090 to RUEF250: Tin-plated Copper-clad Steel, 0.205mm2 (24AWG)
RUEF300 to RUEF900: Tin-plated Copper, 0.52mm2 (20AWG), ø0.81mm (0.032in)
Soldering Characteristics
Solderability per ANSI/J-STD-002 Category 3
Solder Heat Withstand
per IEC 60068-2-20, Test Tb, Method 1; Can withstand 10s at 260°C ±5°
Insulating Material
Cured, Flame-retardant Epoxy Polymer; Meets UL 94V-0
Operation Temperature
-40°C~85°C
Note: Devices are not designed to be placed through a reflow process.
Environmental Specifications
Test
Conditions
Resistance Change
70°C, 1000 hrs
±5%
85°C, 1000 hrs
±5%
Humidity Aging
85°C, 85% R.H., 1000 hrs
±5%
Thermal Shock
85°C to -40°C (10 times)
±5%
Solvent Resistance
MIL-STD-202, Method 215F
No change
Moisture Resistance Level
Level 1, J-STD-020
Storage Conditions
40°C max, 70% RH max; devices should remain in original sealed bags prior to use.
Devices may not meet specified values if these storage conditions are exceeded.
Passive Aging
3
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 07/16/21
C C C
L L
CL to CL
CL to CL
A
A
E
E
A
A
B
Radial Leaded
C
CL to CL
A
F
CL CL
B
D
D
A
A
A
A
C
CL to CL
C
F
CL to CL C C
L L
F
CL CL
C
CL to CL
Figure 1
CL to CL
E
A
Dimensions
and Weights
A
Dimensions in Millimeters (Inches)
A
J
Max
BE
Min
Max
E
Min
C
H
Max
Min
A
C
H
E
D
F
CL CL
Figure 4
Max
3.0CL to CL 0.89CL to CL0.8
(0.12) (0.035) (0.03)
1,3,4
0.183
Max
DC
J
Typ D
Typ
D
C
—
3.0
0.89
0.8
(0.12) (0.035) (0.03)
1,3,4
0.204
8.9
(0.35)
—
13.5
4.3
5.8
7.6
(0.53) (0.17) (0.23) (0.30)
—
—
3.0
0.89
1.0
(0.12) (0.035) (0.04)
1,3,4
0.255
8.9
(0.35)
—
15.2
4.3
5.8
7.6
(0.60) (0.17) (0.23) (0.30)
—
—
3.0
0.89
1.0
(0.12) (0.035) (0.04)
1,3,4
0.289
—
10.2
(0.40)
—
15.7
4.3
5.8
7.6
(0.62) (0.17) (0.23) (0.30)
—
—
3.0
0.89
1.0
(0.12) (0.035) (0.04)
1,3,4
0.379
RUEF250
—
11.4
(0.45)
—
18.3
4.3
5.8
7.6
(0.72) (0.17) (0.23) (0.30)
—
—
3.0
0.89
1.2
(0.12) (0.035) (0.05)
1,3,4
0.493
RUEF300
—
11.4
(0.45)
—
16.5
4.3
5.8
7.6
(0.65) (0.17) (0.23) (0.30)
—
—
3.0
1.19
1.5
(0.12) (0.047) (0.06)
2,3,4
0.516
RUEF400
—
14.0
(0.55)
—
19.3
4.3
5.8
7.6
(0.76) (0.17) (0.23) (0.30)
—
—
3.0
1.19
1.7
(0.12) (0.047) (0.07)
2,3,4
0.670
RUEF500
—
14.0
(0.55)
—
24.1
9.4
10.9
7.6
(0.95) (0.37) (0.43) (0.30)
—
—
3.0
1.19
1.0
(0.12) (0.047) (0.04)
2,3,4
0.926
RUEF600
—
16.5
(0.65)
—
24.1
9.4
10.9
7.6
(0.95) (0.37) (0.43) (0.30)
—
—
3.0
1.19
1.0
(0.12) (0.047) (0.04)
2,3,4
1.352
RUEF700
—
19.1
(0.75)
—
25.9
9.4
10.9
7.6
(1.02) (0.37) (0.43) (0.30)
—
—
3.0
1.19
1.2
(0.12) (0.047) (0.05)
2,3,4
1.543
RUEF800
—
21.6
(0.85)
—
28.4
9.4
10.9
7.6
(1.12) (0.37) (0.43) (0.30)
—
—
3.0
1.19
1.5
(0.12) (0.047) (0.06)
2,3,4
1.852
RUEF900
—
24.1
(0.95)
—
29.0
9.4
10.9
7.6
(1.14) (0.37) (0.43) (0.30)
—
—
3.0
1.19
1.5
(0.12) (0.047) (0.06)
2,3,4
2.104
D
RUEF185
—
Device Mass (g)
(Only for Reference)
H
—
RUEF160
—
D
Figure
B
14.2
4.3
5.8
7.6
(0.56) (0.17) (0.23) (0.30)
B
7.4
E
(0.29)
Min
B
B
—
RUEF135
—
E
C—
CL to CL
RUEF110
A
—
E
E
E
12.2
4.3
5.8
7.6
(0.48) (0.17) (0.23) (0.30)
RUEF090
7.4
(0.29)
B
H
D
RUEF – 30V
A
A
E
A
C
C
J
Min
—
E
B
D
C
C
CL to CL
CL to CL
F
CL CL
Figure 2
A
J
C
CL to CL
C
C
F
CL to CL C C
L L
C
A
Part
Number
D
F
CL CL
E
J
Figure 3
F
CL CL
A
J
D
B
D
C
F
CL to CL C C
L L
E
B
J
D
D
F
CL CL
C
CL to CL
E
B
J
D
E
B
B
B
A
B
E
E
J
D
A
D
F
C
F
D C
CL CL
CL to CL C C
CL to CL
L L
C
F
C CC
F
Dimension
CL to CLFigures
L L
CL CL
CL to CL
B
B
E B
F
CL CL
PTC Datasheet
E
E
C
F
CL to CL C C
L L
C
CL to CL
E
E
A
D
D
C
F
CL to CL C C
L L
A
B
D
D
E
A
B
C C C
L L
CL to CL
CL to CL
A
A
RUEF Series
B
E
E
B
F
CL CL
4
—C
CL to CL
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 07/16/21
H
PTC Datasheet
RUEF Series
Radial Leaded
Packaging and Marking Information
Part
Number
Bag
Quantity
Tape and Reel
Quantity
Ammo Pack
Quantity
Standard Package
Quantity
Part
Marking
Agency
Recognition
500
—
—
10,000
U90
UL, CSA, TÜV, CQC
—
3,000
—
15,000
U90
UL, CSA, TÜV, CQC
RUEF – 30V
RUEF090
RUEF090-2
RUEF090-AP
—
—
2,000
10,000
U90
UL, CSA, TÜV, CQC
500
—
—
10,000
U110
UL, CSA, TÜV, CQC
RUEF110-2
—
3,000
—
15,000
U110
UL, CSA, TÜV, CQC
RUEF110-AP
—
—
2,000
10,000
U110
UL, CSA, TÜV, CQC
RUEF110
RUEF135
RUEF135-2
RUEF135-AP
500
—
—
10,000
U135
UL, CSA, TÜV, CQC
—
3,000
—
15,000
U135
UL, CSA, TÜV, CQC
—
—
2,000
10,000
U135
UL, CSA, TÜV, CQC
500
—
—
10,000
U160
UL, CSA, TÜV, CQC
RUEF160-2
—
3,000
—
15,000
U160
UL, CSA, TÜV, CQC
RUEF160-AP
—
—
2,000
10,000
U160
UL, CSA, TÜV, CQC
RUEF160
RUEF185
RUEF185-2
RUEF185-AP
500
—
—
10,000
U185
UL, CSA, TÜV, CQC
—
3,000
—
15,000
U185
UL, CSA, TÜV, CQC
—
—
2,000
10,000
U185
UL, CSA, TÜV, CQC
500
—
—
10,000
U250
UL, CSA, TÜV, CQC
RUEF250-2
—
3,000
—
15,000
U250
UL, CSA, TÜV, CQC
RUEF250-AP
—
—
2,000
10,000
U250
UL, CSA, TÜV, CQC
RUEF250
RUEF300
RUEF300-2
RUEF300-AP
500
—
—
10,000
U300
UL, CSA, TÜV, CQC
—
2,500
—
12,500
U300
UL, CSA, TÜV, CQC
—
—
1,000
5,000
U300
UL, CSA, TÜV, CQC
500
—
—
10,000
U400
UL, CSA, TÜV, CQC
RUEF400-2
—
1,500
—
7,500
U400
UL, CSA, TÜV, CQC
RUEF400-AP
—
—
1,000
5,000
U400
UL, CSA, TÜV, CQC
RUEF400
RUEF500
RUEF500-2
RUEF500-AP
RUEF600
RUEF600-2
RUEF600-AP
250
—
—
5,000
U500
UL, CSA, TÜV, CQC
—
1,500
—
7,500
U500
UL, CSA, TÜV, CQC
—
—
1,000
5,000
U500
UL, CSA, TÜV, CQC
250
—
—
5,000
U600
UL, CSA, TÜV, CQC
—
1,000
—
5,000
U600
UL, CSA, TÜV, CQC
—
—
1,000
5,000
U600
UL, CSA, TÜV, CQC
250
—
—
5,000
U700
UL, CSA, TÜV, CQC
RUEF700-2
—
1,000
—
5,000
U700
UL, CSA, TÜV, CQC
RUEF700-AP
—
—
1,000
5,000
U700
UL, CSA, TÜV, CQC
RUEF700
RUEF800
RUEF800-2
RUEF800-AP
250
—
—
5,000
U800
UL, CSA, TÜV, CQC
—
1,000
—
5,000
U800
UL, CSA, TÜV, CQC
—
—
1,000
5,000
U800
UL, CSA, TÜV, CQC
250
—
—
5,000
U900
UL, CSA, TÜV, CQC
RUEF900-2
—
1,000
—
4,000
U900
UL, CSA, TÜV, CQC
RUEF900-AP
—
—
1,000
4,000
U900
UL, CSA, TÜV, CQC
RUEF900
5
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 07/16/21
PTC Datasheet
RUEF Series
Radial Leaded
Part Ordering Number System
RUEF 250 U 2
Packaging
Blank = Packaged in Bags
-1 = 25.4mm (1.0 in) Minimum Lead Length
-2 = Tape and Reel
-AP = Ammo Pack
-X.X = Special Lead Cut Length (in)
Modifier
K
= Standard Kinked Lead
B
= Special Kinked Lead
S
= Straight Lead
U
= Uncoated Device
Hold Current Indicator
Product Series
An “F” at the end of product series indicates Pb-free version of product.
Note: Kinked parts are recommended to control the height of the part on the PCB in non-auto PCB applications.
6
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 07/16/21
PTC Datasheet
RUEF Series
Radial Leaded
Tape and Reel Specifications
RUEF devices are available in tape and reel packaging per EIA468–B/IEC60286–2 standards.
See Figures 1 and 2 for details.
EIA Mark
Dimension (mm)
Carrier Tape Width
Description
W
18
-0.5/+1.0
Hold-down Tape Width
W4
11
Minimum
Top Distance between Tape Edges
W6
3
Maximum
Sprocket Hole Position
W5
9
-0.5/+0.75
Sprocket Hole Diameter
W0
4
± 0.2
Abscissa to Plane (Straight Lead)* (RUEF300 to RUEF900)
H
18.5
± 2.5
Abscissa to Plane (Kinked Lead) (RUEF090 to RUEF250)
H0
16.0
± 0.5
Abscissa to Top (RUEF090 to RUEF300)
H1
32.2
Maximum
Abscissa to Top* (RUEF400 to RUEF900)
H1
45.0
Maximum
Overall Width with Lead Protrusion (RUEF090 to RUEF300)
C1
43.2
Maximum
Overall Width with Lead Protrusion (RUEF400 To RUEF900)
C1
56
Maximum
Overall Width without Lead Protrusion (RUEF090 to RUEF300)
C2
42.5
Maximum
Overall Width without Lead Protrusion (RUEF400 to RUEF900)
C2
56
Maximum
Lead Protrusion
L1
1.0
Maximum
Protrusion of Cut-out
L
11
Maximum
Protrusion beyond Hold-down Tape
I2
Not Specified
—
Sprocket Hole Pitch
P0
12.7
± 0.3
Device Pitch (RUEF090 to RUEF300)
—
12.7
± 0.3
Device Pitch (RUEF400 to RUEF900)
—
25.4
± 0.6
Pitch Tolerance
—
20 Consecutive
±1
Tape Thickness
T
0.9
Maximum
Overall Tape and Lead Thickness (RUEF090 to RUEF50)
T1
1.5
Maximum
Overall Tape and Lead Thickness* (RUEF300 to RUEF900)
T1
2.3
Maximum
Splice Sprocket Hole Alignment
—
0
± 0.3
Body Lateral Deviation
Dh
0
± 1.0
Body Tape Plane Deviation
0
± 1.3
Ordinate to Adjacent Component Lead (RUEF090 to RUEF300)
Dp
P1
3.81
± 0.7
Ordinate to Adjacent Component Lead (RUEF400 to RUEF900)
P1
7.62
± 0.7
Lead Spacing* (RUEF090 to RUEF400)
F
5.05
± 0.75
Lead Spacing* (RUEF500 to RUEF900)
F
10.15
± 0.75
Reel Width (RUEF090 to RUEF400)
W2
56.0
Maximum
Reel Width (RUEF500* to RUEF900)
W2
63.5
Maximum
A
370.0
Maximum
Space between Flanges* (RUEF090 to RUEF400)
W1
48.0
Maximum
Space between Flanges* (RUEF500 to RUEF900)
W1
55.0
Maximum
Arbor Hold Diameter
C
26.0
± 12.0
Core Diameter*
N
91.0
Maximum
Maximum
Reel Diameter
Tolerance
Box
—
64/372/362
Consecutive Missing Places
—
None
—
Empty Places per Reel
—
0.1%
Maximum
*Differs from EIA specification.
7
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: GD. 07/16/21
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