PolySwitch® Resettable PPTCs
Radial Leaded > RXEF Series
RXEF Series
RoHS
Description
Littelfuse PolySwitch radial-leaded devices represent the
most comprehensive and complete set of PPTC products
available in the industry today. RXEF series offers low hold
currents (down to 50mA) and high voltage rating
(up to 72V).
Features
• Resettable and single-use overcurrent devices
• Wide range of form factor and termination methods
• Devices compatible with high-volume electronics
assembly
Agency Approvals
• RoHS compliant, Lead-Free and Halogen-Free
AGENCY
AGENCY FILE NUMBER
Applications
E74889
78165
72161785
• 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
• Printers
• IEEE 1394 ports
Additional Information
Datasheet
Samples
Resources
Electrical Characteristics
Part
Number
IH
IT
(A)
(A)
VMAX
(VDC)
IMAX
(VAC RMS)
(DCADC)
PD Typ
(ACARMS)
(W)
Max Time-to-trip
(A)
(s)
RMIN
RMAX
R1MAX
(Ω)
(Ω)
(Ω)
Lead Size
(mm2/AWG)
RXEF – 60V
RXEF005
0.05
0.10
60
–
40
–
0.22
0.25
5.0
7.3
11.10
20.00
0.128/26
RXEF010
0.10
0.20
60
–
40
–
0.38
0.50
4.0
2.5
4.50
7.50
0.205/24
RXEF017
0.17
0.34
60
–
40
–
0.48
0.85
3.0
3.3
5.21
8.00
0.205/24
Notes:
IH
: Hold current: maximum current device will pass without interruption in 20°C still air.
RMIN : Minimum resistance of device as supplied at 20°C unless otherwise specified.
I T
: Trip current: minimum current that will switch the device from low resistance to
high resistance in 20°C still air.
RMAX : Maximum resistance of device as supplied at 20°C unless otherwise specified.
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.
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.
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/22/18
PolySwitch® Resettable PTCs
Radial Leaded > RXEF Series
Electrical Characteristics
Part
Number
IH
IT
(A)
(A)
(Cont’d)
VMAX
(VDC)
IMAX
(VAC RMS)
(DCADC)
PD Typ
(ACARMS)
(W)
Max Time-to-trip
(A)
(s)
RMIN
RMAX
R1MAX
(Ω)
(Ω)
(Ω)
Lead Size
(mm2/AWG)
RXEF – 72V
RXEF020
0.20
0.40
72
72
40
40
0.41
1.00
2.2
1.83
2.75
4.40
0.205/24
RXEF025
0.25
0.50
72
72
40
40
0.45
1.25
2.5
1.25
1.95
3.00
0.205/24
RXEF030
0.30
0.60
72
72
40
40
0.49
1.50
3.0
0.88
1.33
2.10
0.205/24
RXEF040
0.40
0.80
72
72
40
40
0.56
2.00
3.8
0.55
0.86
1.29
0.205/24
RXEF050
0.50
1.00
72
72
40
40
0.77
2.50
4.0
0.50
0.77
1.17
0.205/24
RXEF065
0.65
1.30
72
72
40
40
0.88
3.25
5.3
0.31
0.48
0.72
0.205/24
RXEF075
0.75
1.50
72
72
40
40
0.92
3.75
6.3
0.25
0.40
0.60
0.205/24
RXEF090
0.90
1.80
72
72
40
40
0.99
4.50
7.2
0.20
0.31
0.47
0.205/24
RXEF110
1.10
2.20
72
72
40
40
1.50
5.50
8.2
0.15
0.25
0.38
0.520/20
RXEF135
1.35
2.70
72
72
40
40
1.70
6.75
9.6
0.12
0.19
0.30
0.520/20
RXEF160
1.60
3.20
72
72
40
40
1.90
8.00
11.4
0.09
0.14
0.22
0.520/20
RXEF185
1.85
3.70
72
72
40
40
2.10
9.25
12.6
0.08
0.12
0.19
0.520/20
RXEF250
2.50
5.00
72
72
40
40
2.50
12.50
15.6
0.05
0.08
0.13
0.520/20
RXEF300
3.00
6.00
72
72
40
40
2.80
15.00
19.8
0.04
0.06
0.10
0.520/20
RXEF375
3.75
7.50
72
72
40
40
3.20
18.75
24.0
0.03
0.05
0.08
0.520/20
Notes:
IH
: Hold current: maximum current device will pass without interruption in 20°C still air.
RMIN : Minimum resistance of device as supplied at 20°C unless otherwise specified.
I T
: Trip current: minimum current that will switch the device from low resistance to
high resistance in 20°C still air.
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.
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
* Electrical characteristics determined at 25°C.
: Power dissipated from device when in the tripped state in 20°C still air.
Typical Time-to-Trip Curves at 20°C
1000
J = RXEF075
K = RXEF090
L = RXEF110
M = RXEF135
N = RXEF160
O = RXEF185
P = RXEF250
Q = RXEF300
R = RXEF375
B
C D E F G H I J K L MNO P Q R
100
A
10
Time-to-Trip (s)
RXEF
A = RXEF005
B = RXEF010
C = RXEF017
D = RXEF020
E = RXEF025
F = RXEF030
G = RXEF040
H = RXEF050
I = RXEF065
R
Q
P
1
0.1
0.01
A
0.001
0.1
1
B
Fault Current (A)
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/22/18
10C D E F
G
O
N
M
L
K
J
I
H
100
PolySwitch® Resettable PPTCs
Radial Leaded > RXEF Series
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)
RXEF – 60V
RXEF005
0.078
0.068
0.06
0.05
0.048
0.04
0.035
0.032
0.027
0.02
RXEF010
0.160
0.140
0.11
0.10
0.096
0.08
0.072
0.067
0.050
0.04
RXEF017
0.260
0.230
0.21
0.17
0.160
0.14
0.120
0.110
0.090
0.07
0.16
0.14
0.13
0.11
0.08
RXEF – 72V
RXEF020
0.31
0.27
0.24
0.20
0.19
RXEF025
0.39
0.34
0.30
0.25
0.24
0.20
0.18
0.16
0.14
0.10
RXEF030
0.47
0.41
0.36
0.30
0.29
0.24
0.22
0.20
0.16
0.12
RXEF040
0.62
0.54
0.48
0.40
0.38
0.32
0.29
0.25
0.22
0.16
RXEF050
0.78
0.68
0.60
0.50
0.48
0.41
0.36
0.32
0.27
0.20
RXEF065
1.01
0.88
0.77
0.65
0.62
0.53
0.47
0.41
0.35
0.26
RXEF075
1.16
1.02
0.89
0.75
0.72
0.61
0.54
0.47
0.41
0.30
RXEF090
1.40
1.22
1.07
0.90
0.86
0.73
0.65
0.57
0.49
0.36
RXEF110
1.71
1.50
1.31
1.10
1.06
0.89
0.79
0.69
0.59
0.44
RXEF135
2.09
1.84
1.61
1.35
1.30
1.09
0.97
0.85
0.73
0.54
RXEF160
2.48
2.18
1.90
1.60
1.54
1.30
1.15
1.01
0.86
0.64
RXEF185
2.87
2.52
2.20
1.85
1.78
1.50
1.33
1.17
1.00
0.74
RXEF250
3.88
3.40
2.98
2.50
2.40
2.03
1.80
1.58
1.35
1.00
RXEF300
4.65
4.08
3.57
3.00
2.88
2.43
2.16
1.89
1.62
1.20
RXEF375
5.81
5.10
4.46
3.75
3.60
3.04
2.70
2.36
2.03
1.50
Temperature Rerating Curve
% of Rated Hold and Trip Current
200
150
100
50
0
-40
-20
0
20
40
60
80
Ambient Temperature (˚C)
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/22/18
PolySwitch® Resettable PTCs
Radial Leaded > RXEF Series
Physical Specifications
RXEF005: Tin-plated Nickel-copper Alloy, 0.128mm2 (26AWG), ø0.40mm (0.016in)
RXEF010: Tin-plated Nickel-copper Alloy, 0.205mm2 (24AWG), ø0.51mm (0.020in)
Lead Material
RXEF017 to 040: Tin-plated Copper-clad Steel, 0.205mm2 (24AWG), ø0.51mm (0.020in)
RXEF050 to 090 : Tin-plated Copper, 0.205mm2 (24AWG), ø0.51mm (0.020in)
RXEF110 to 375: Tin-plated Copper, 0.52mm2 (20AWG), ø0.81mm (0.032in)
Soldering Characteristics
Solder Heat Withstand
Solderability per ANSI/J-STD-002 Category 3
RXEF005, RXEF010 Meet ANSI/J-STD-002 Category 1
RXEF005- RXEF025: per IEC-STD 68-2-20, Test Tb, Method 1a, Condition a;
Can Withstand 5s at 260°C ±5°C
All Other Sizes: per IEC-STD 68-2-20, Test Tb, Method 1a, Condition b;
Can Withstand 10s at 260°C ±5°C
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
-40°C, 1000 hrs
±5%
85°C, 1000 hrs
±5%
Humidity Aging
85°C, 85% R.H., 1000 hrs
±10%
Thermal Shock
85°C to -40°C 10 times
±10%
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
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/22/18
E
E
E
A
E
A
E
A
C
B
B
® CL CL
PolySwitch
Resettable PPTCs
B
B
B
to
B
E
A
F
CL CL
B
B
C
CL to CL
B
F
CL CL
B
CL
Radial Leaded > RXEF Series
D
D
D
F
C
CL toCLCL CL
C F
CL toCC
LL CL
D
D
F
C
CL to CL
C
CL to CL
CL CL
A
D
E
D
D
A
D
C
CL to CL
C
CL toBCL
C
CL to CL
D
E
C
F
CL CL
CL to CL
C
CL to CL
CL
B
Dimension Figures
A E
AE
A E
A
E
A E
D
A
E
A
C
CL to CL
B
B
B
D
D
D
C F
CL toCLCL CL
CL
CL
A
C F
CL toCLCLCL
B
B
A E
E
F
CL CL
B
B
D
E
J
B
C
CL to CL
B
F
CL CL J
E
CL
Figure 4
D
D
C
C
F
CL CL
C F
CL CL
CL toCL
F
CL to CL CL
CL to CL
Figure 1
D
D
D
D
A
J
C
C
F
CL CL
CL to CL CL
J
CL to CL
Figure 2
C F
C
CL to C
LL CL
F
Figure 3
C
F
CL CL
A
E
E
H
Figure 5
A E
A E
A E
A
E
A E
A E
A
E
A E
E
B
CL
Dimensions and Weights
B
B
B
B
B
Dimensions in Millimeters (Inches)
A
Part
Number
A
D
D
C F
C
CL to C
LL CL
Min D
C F
CL toCLCLCL
Max
—
8.0
(0.32)
RXEF010
—
7.4
(0.29)
J
RXEF020
C
CL to CL
E
—
C
D
Max
C F
CL to CL
CL CL
C F
CL to C
L CL
D
Min
8.3
(0.33)
4.3
(0.17)
5.8
(0.23)
7.6
(0.30)
—
11.6
(0.46)
4.3
(0.17)
5.8
(0.23)
7.6
(0.30)
4.3 C 5.8
(0.17) (0.23)
7.6
C
(0.30)
H
H
—
J
12.7
C
(0.50)
E
7.4
(0.29)
—
E
C
CL to CL
—
—
A
—
3.0
1.17
(0.12)C (0.046)
4.3
(0.17)
5.8
(0.23)
7.6
(0.30)
—
C
F
CL CL
1.0
(0.04)
1,4,5
A E
E
1.0
(0.04)
1.7
(0.07)
0.069
2,4,5
0.128
2,4,5
0.174
B
CL to CL
C to CL
1.0
(0.04)
D
2,4,5
0.119
2,4,5
0.130
C
CL to CL
1.0
3.0L
(0.12)
1.17
(0.046)
—
—
3.0
(0.12)
1.17
(0.046)
1.0
(0.04)
2,4,5
0.143
7.6
(0.30)
—
—
3.0
(0.12)
1.17
(0.046)
1.2
(0.05)
2,4,5
0.202
5.8
(0.23)
7.6
(0.30)
—
—
3.0
(0.12)
1.17
(0.046)
1.2
(0.05)
2,4,5
0.210
4.3
(0.17)
5.8
(0.23)
7.6
(0.30)
—
—
3.0
(0.12)
1.17
(0.046)
1.5
(0.06)
2,4,5
0.277
—
12.7
(0.50)
4.3
(0.17)
5.8
(0.23)
7.6
(0.30)
RXEF040
—
7.6
(0.30)
—
13.5
(0.53)
4.3
(0.17)
5.8
(0.23)
7.9
(0.31)
—
13.7
(0.54)
4.3
(0.17)
9.4
(0.37)
—
14.5
(0.57)
CL to CL
C F
CL to CC
LL CL
—
7.4
E
(0.29)
C
D
D
11.7
(0.46)
—
C
B
1.68
(0.066)
D
H
A ERXEF030A E
D
1.07
(0.042)
Typ
Device Mass (g)
for Reference)
CL to CL(Only
RXEF – 72V
—
—
A E
B
7.6
(0.30)
D
1.07
(0.042)
3.0
(0.12)
5.8
(0.23)
RXEF065
3.0
(0.12)
—
4.3
(0.17)
D
C F
CL to CL CL
—
A
12.7
(0.50)
—
Typ
3.0
(0.12)
—
RXEF050
D
D
Max
—
7.4
(0.29)
B
D
CL to CL
D
Figure C
J
C
—
—
B
B
CL CL
RXEF025
B
Min
H
RXEFF– 60V
—
A
E
Max
B
E
D
DMax
Min
A
7.4
(0.29)
—
J
Min
F
CL CL
RXEF005
RXEF017
J
J
B
B
B
B
(0.04)
RXEF075
—
10.2
(0.40)
—
15.2
(0.60)
4.3
(0.17)
5.8
(0.23)
7.6
(0.30)
—
—
3.0
(0.12)
1.17
(0.046)
1.5
(0.06)
2,4,5
0.310
RXEF090
—
11.2
(0.44)
—
15.8
(0.62)
4.3
(0.17)
5.8
(0.23)
7.6
(0.30)
—
—
3.0
(0.12)
1.17
(0.046)
1.5
(0.06)
2,4,5
0.365
CL to CL
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/22/18
A
E
B
A
E
E
A
E
A
E
A
C
®
PolySwitch
Resettable
PTCs
B
B
B
B
CL to CL
B
E
A
F
CL CL
B
B
B
E
D
D
D
C
CL to CL
F
CL CL
B
Radial Leaded > RXEF Series
D
D
F
C
CL toCLCL CL
C F
CL toCC
LL CL
C
CL to CL
D
D
D
F
C
CL to CL
C
CL to CL
CL CL
A
D
C
CL to CL
C
CL toBCL
C
CL to CL
D
A
E
C
F
CL CL
CL to CL
C
CL to CL
B
Dimension Figures
A E
A
AE
A E
A
E
A E
D
A
E
A
C
CL to CL
B
B
B
D
D
D
C F
CL toCLCL CL
C
CL to CL
C F
CL toCLCLCL
B
B
A E
E
F
CL CL
B
B
B
D
E
J
C
CL to CL
B
F
CL CL J
Figure 4
D
D
C
C
F
CL CL
C F
CL CL
CL toCL
F
CL to CL CL
CL to CL
Figure 1
D
D
D
D
A
J
C
C
F
CL CL
CL to CL CL
J
CL to CL
Figure 2
C F
C
CL to C
LL CL
F
Figure 3
C
F
CL CL
A
E
E
H
Figure 5
A E
A
A E
A E
A
E
A E
A E
A
E
A E
E
B
Dimensions and Weights
B
B
(Cont’d)
B
B
B
Dimensions in Millimeters (Inches)
A
D
A
D
C F
C
CL to C
LL CL
C
CL to CL
Min D
C F
CL toCLCLCL
C
CL to CL
Max
12.8
(0.50)
RXEF135
—
14.5
(0.57)
J
E
—
17.5
(0.69)
RXEF250
—
RXEF300
A E
RXEF375
C
D
Max
C F
CL to CL
CL CL
C F
CL to C
L CL
D
Min
17.5
(0.69)
4.3
(0.17)
5.8
(0.23)
7.6
(0.30)
—
19.1
(0.75)
4.3
(0.17)
5.8
(0.23)
7.6
(0.30)
4.3 C 5.8
(0.17) (0.23)
7.6
C
(0.30)
H
5.8
(0.23)
7.6
(0.30)
A
—
J
20.8
C
(0.82)
E
E
Min
B
H
CL CL
C
CL to CL
—
—
D
A
J
D
D
Max
Typ
C F
CL to CL CL
RXEFF– 72V
—
A
E
Max
3.0
(0.12)
1.37
(0.054)
A E
—
3.0
(0.12)
1.37
(0.054)
1.5
(0.06)
—
—
3.0
D
(0.12)
1.37
D
(0.054)
1.5
(0.06)
3.0 C 1.37
(0.12)
CL to CL(0.054)
C
(0.07)
CL to
CL
H
H
B
F
CL CL
3,4,5
A E
—
Device Mass (g)
for Reference)
CL to CL(Only
D
1.2
(0.05)
3.0
(0.12)
B
Figure C
C F
CL to CC
LL CL
—
A
1.37
(0.054)
Typ
C
—
CL to CL
D
E
D
DMax
Min
B
0.546
E
1.2
(0.05)
3,4,5
0.653
3,4,5
0.684
3,4,5
0.808
3,4,5
1.139
B
—
22.4
(0.88)
4.3
(0.17)
20.8
(0.82)
—
25.4
(1.00)
9.4
(0.37)
10.9
(0.43)
7.6
(0.30)
—
C—
CL to CL
—
23.9
(0.94)
—
28.6
(1.13)
9.4
(0.37)
10.9
(0.43)
7.6
(0.30)
—
—
3.0
(0.12)
1.37
(0.054)
1.7
(0.07)
3,4,5
1.379
—
27.2E
(1.07)
—
31.8
(1.25)
9.4
(0.37)
10.9
(0.43)
7.6
(0.30)
—
—
3.0
(0.12)
1.37
(0.054)
1.7
(0.07)
3,4,5
1.708
B
B
B
D
D
D
C
CL to CL
C
CL to CL
16.3
(0.64)
—
RXEF185
A E
Min
F
CL CL
—
J
A
B
RXEF110
RXEF160
J
J
J
Part
Number
B
B
B
C
CL to CL
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/22/18
1.7
D
PolySwitch® Resettable PPTCs
Radial Leaded > RXEF Series
Packaging and Marking Information
Part
Number
Bag
Quantity
Tape and Reel
Quantity
Ammo Pack
Quantity
Standard Package
Quantity
Part
Marking
Agency
Recognition
RXEF – 60V
500
—
—
10,000
—
UL, CSA, TÜV, CQC
RXEF005-2
RXEF005
—
3,000
—
15,000
—
UL, CSA, TÜV, CQC
RXEF005-AP
—
—
2,000
10,000
—
UL, CSA, TÜV, CQC
RXEF010
RXEF010-2
RXEF010-AP
500
—
—
10,000
X10
UL, CSA, TÜV, CQC
—
3,000
—
15,000
X10
UL, CSA, TÜV, CQC
—
—
2,000
10,000
X10
UL, CSA, TÜV, CQC
500
—
—
10,000
X17
UL, CSA, TÜV, CQC
RXEF017-2
—
2,500
—
12,500
X17
UL, CSA, TÜV, CQC
RXEF017-AP
—
—
2,000
10,000
X17
UL, CSA, TÜV, CQC
RXEF017
RXEF – 72V
RXEF020
RXEF020-2
RXEF020-AP
500
—
—
10,000
X20
UL, CSA, TÜV, CQC
—
3,000
—
15,000
X20
UL, CSA, TÜV, CQC
—
—
2,000
10,000
X20
UL, CSA, TÜV, CQC
500
—
—
10,000
X25
UL, CSA, TÜV, CQC
RXEF025-2
—
3,000
—
15,000
X25
UL, CSA, TÜV, CQC
RXEF025-AP
—
—
2,000
10,000
X25
UL, CSA, TÜV, CQC
500
—
—
10,000
X30
UL, CSA, TÜV, CQC
RXEF030-2
—
3,000
—
15,000
X30
UL, CSA, TÜV, CQC
RXEF030-AP
—
—
2,000
10,000
X30
UL, CSA, TÜV, CQC
RXEF025
RXEF030
500
—
—
10,000
X40
UL, CSA, TÜV, CQC
RXEF040-2
RXEF040
—
3,000
—
15,000
X40
UL, CSA, TÜV, CQC
RXEF040-AP
—
—
2,000
10,000
X40
UL, CSA, TÜV, CQC
RXEF050
RXEF050-2
RXEF050-AP
500
—
—
10,000
X50
UL, CSA, TÜV, CQC
—
3,000
—
15,000
X50
UL, CSA, TÜV, CQC
—
—
2,000
10,000
X50
UL, CSA, TÜV, CQC
500
—
—
10,000
X65
UL, CSA, TÜV, CQC
RXEF065-2
—
3,000
—
15,000
X65
UL, CSA, TÜV, CQC
RXEF065-AP
—
—
2,000
10,000
X65
UL, CSA, TÜV, CQC
500
—
—
10,000
X75
UL, CSA, TÜV, CQC
RXEF075-2
—
3,000
—
15,000
X75
UL, CSA, TÜV, CQC
RXEF075-AP
—
—
2,000
10,000
X75
UL, CSA, TÜV, CQC
RXEF065
RXEF075
RXEF090
RXEF090-2
RXEF090-AP
500
—
—
10,000
X90
UL, CSA, TÜV, CQC
—
3,000
—
15,000
X90
UL, CSA, TÜV, CQC
—
—
2,000
10,000
X90
UL, CSA, TÜV, CQC
500
—
—
10,000
X110
UL, CSA, TÜV, CQC
RXEF110-2
—
1,500
—
7,500
X110
UL, CSA, TÜV, CQC
RXEF110-AP
—
—
1,000
5,000
X110
UL, CSA, TÜV, CQC
RXEF110
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/22/18
PolySwitch® Resettable PTCs
Radial Leaded > RXEF Series
Packaging and Marking Information
Part
Number
Bag
Quantity
(Cont’d)
Tape and Reel
Quantity
Ammo Pack
Quantity
Standard Package
Quantity
Part
Marking
Agency
Recognition
RXEF – 72V
500
—
—
10,000
X135
UL, CSA, TÜV, CQC
RXEF135-2
RXEF135
—
1,500
—
7,500
X135
UL, CSA, TÜV, CQC
RXEF135-AP
—
—
1,000
5,000
X135
UL, CSA, TÜV, CQC
RXEF160
RXEF160-2
RXEF160-AP
500
—
—
10,000
X160
UL, CSA, TÜV, CQC
—
1,500
—
7,500
X160
UL, CSA, TÜV, CQC
—
—
1,000
5,000
X160
UL, CSA, TÜV, CQC
500
—
—
10,000
X185
UL, CSA, TÜV, CQC
RXEF185-2
—
1,500
—
7,500
X185
UL, CSA, TÜV, CQC
RXEF185-AP
—
—
1,000
5,000
X185
UL, CSA, TÜV, CQC
250
—
—
5,000
X250
UL, CSA, TÜV, CQC
RXEF250-2
—
1,000
—
5,000
X250
UL, CSA, TÜV, CQC
RXEF250-AP
—
—
1,000
5,000
X250
UL, CSA, TÜV, CQC
RXEF185
RXEF250
RXEF300
RXEF300-2
RXEF300-AP
RXEF375
250
—
—
5,000
X300
UL, CSA, TÜV, CQC
—
1,000
—
5,000
X300
UL, CSA, TÜV, CQC
—
—
1,000
5,000
X300
UL, CSA, TÜV, CQC
250
—
—
5,000
X375
UL, CSA, TÜV, CQC
Part Ordering Number System
RXEF 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.
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/22/18
PolySwitch® Resettable PPTCs
Radial Leaded > RXEF Series
Tape and Reel Specifications
RXEF devices are available in tape and reel packaging per EIA468-B/IEC60286-2 standards.
See Figures 1 and 2 for details.
Description
EIA Mark
Dimension (mm)
Tolerance
Carrier Tape Width
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
D0
4
± 0.2
Abscissa to Plane (Straight Lead) (RXEF110 To RXEF300)
H
18.5
± 2.5
Abscissa to Plane (Kinked Lead) (RXEF010 To RXEF090)
H0
16.0
± 0.5
Abscissa to Top (RXEF010 To RXEF090)
H1
32.2
Maximum
Abscissa to Top* (RXEF110 To RXEF300)
H1
47.5
Maximum
Overall Width with Lead Protrusion (RXEF010 To RXEF090)
C1
43.2
Maximum
Overall Width with Lead Protrusion* (RXEF110 To RXEF300)
C1
58
Maximum
Overall Width without Lead Protrusion (RXEF010 To RXEF090)
C2
42.5
Maximum
Overall Width without Lead Protrusion* (RXEF110 To RXEF300)
C2
57.0
Maximum
Lead Protrusion
L1
1.0
Maximum
Protrusion of Cut-Out
L
11.0
Maximum
Protrusion beyond Hold-down Tape
I2
Not Specified
—
Sprocket Hole Pitch
P0
12.7
± 0.3
Device Pitch (RXEF010 To RXEF090)
—
12.7
± 0.3
Device Pitch (RXEF110 To RXEF300)
—
25.4
± 0.61
Pitch Tolerance
—
20 Consecutive
±1
Tape Thickness
T
0.9
Maximum
Overall Tape and Lead Thickness (RXEF010 To RXEF090)
T1
1.5
Maximum
Overall Tape and Lead Thickness (RXEF110 To RXEF300)
T1
2.3
Maximum
Splice Sprocket Hole Alignment
—
0
± 0.3
Body Lateral Deviation
h
0
± 1.0
Body Tape Plane Deviation
p
0
± 1.3
± 0.7
Ordinate to Adjacent Component Lead (RXEF010 To RXEF185)
P1
3.81
Ordinate to Adjacent Component Lead (RXEF250 To RXEF300)
P1
7.62
± 0.7
Lead Spacing* (RXEF010 To RXEF185)
F
5.05
± 0.75
Lead Spacing* (RXEF250 To RXEF300)
F
10.15
± 0.75
Reel Width (RXEF010 To RXEF090)
W2
56.0
Maximum
Reel Width* (RXEF110 To RXEF300)
W2
63.5
Maximum
A
370.0
Maximum
Space between Flanges* (RXEF010 To RXEF090)
W1
48.0
Maximum
Space between Flanges* (RXEF110 To RXEF300)
W1
55.0
Maximum
C
26.0
± 12.0
Reel Diameter
Arbor Hold Diameter
Core Diameter*
N
91.0
Maximum
Box
—
64/372/362
Maximum
Consecutive Missing Places
—
None
—
Empty Places per Reel
—
0.1%
Maximum
*Differs from EIA specification.
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/22/18
PolySwitch® Resettable PTCs
Radial Leaded > RXEF Series
Tape and Reel Diagrams
h
p
h
p
Reference Plane
H1
P1
H1
F
A
L
H0
B
D4
C2
C1
H
W5
W
I2
L1
P0
D0
Figure 1
Direction of Unreeling
Cross Section A-B
t
Reel
Upper Side
n
Type
a
Direction of
Unreeling
Lower Side
c
w1
Cross Section
w2
Optional Shape: Circular or Polygonal
Figure 2
WARNING
• Users should independently evaluate the suitability of and test each product selected for their own application.
• Operation beyond the maximum ratings or improper use may result in device damage and possible electrical arcing and flame.
• These devices are intended for protection against damage caused by occasional overcurrent or overtemperature fault conditions and should not be used when
repeated fault conditions or prolonged trip events are anticipated.
• Contamination of the PPTC material with certain silicone-based oils or some aggressive solvents can adversely impact the performance of the devices.
• Device performance can be impacted negatively if devices are handled in a manner inconsistent with recommended electronic, thermal, and mechanical
procedures for electronic components.
• PPTC devices are not recommended for installation in applications where the device is constrained such that its PTC properties are inhibited, for example in rigid
potting materials or in rigid housings, which lack adequate clearance to accommodate device expansion.
• Operation in circuits with a large inductance can generate a circuit voltage (Ldi/dt) above the rated voltage of the device.
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each
product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications.
Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 10/22/18
