RHEF550 - LITTELFUSE - Datasheet.Live

PolySwitch® Resettable PPTCs

Speciﬁcations are subject to change without notice.

Revised: 10/22/18

Radial Leaded > RHEF Series

RHEF Series RoHS

Description

Littelfuse PolySwitch radial-leaded devices represent the

most comprehensive and complete set of PPTC products

available in the industry today. RHEF series offers ﬂatter

thermal derating and operating temperatures up to 125°C.

Features

• 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

• Satellite video receivers

• Industrial controls

• Transformers

• Computer motherboards

• Modems

• USB hubs, ports and

peripherals

• IEEE 1394 ports

• CD-ROMs

• Game machines

• Battery packs

• Phones

• Fax machines

• Analog and digital line cards

• Printers

Agency Approvals

AGENCY AGENCY FILE NUMBER

E74889

78165

72161789

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.

Electrical Characteristics

Part

Number

IHITVMAX IMAX PD Typ Max Time-to-trip RMIN RMAX R1MAX Lead Size

(mm2/AWG)

(A) (A) (VDC) (VAC RMS) (DCADC)(ACARMS) (W) (A) (s) (Ω) (Ω) (Ω)

RHEF* – 30V - High Temperature

RHEF050 0.5 0.9 30 — 40 — 0.9 2.5 2.5 0.480 0.780 1. 10 0.205/24

RHEF070 0.7 1. 4 30 — 40 — 1. 4 3.5 3.2 0.300 0.540 0.80 0.205/24

RHEF100 1. 0 1. 8 30 — 40 — 1. 4 5.0 5.2 0.180 0.300 0.43 0.205/24

Additional Information

Datasheet Resources Samples

PolySwitch® Resettable PTCs

Speciﬁcations are subject to change without notice.

Revised: 10/22/18

Radial Leaded > RHEF Series

Electrical Characteristics (Cont’d)

Part

Number

IHITVMAX IMAX PD Typ Max Time-to-trip RMIN RMAX R1MAX Lead Size

(mm2/AWG)

(A) (A) (VDC) (VAC RMS) (DCADC)(ACARMS) (W) (A) (s) (Ω) (Ω) (Ω)

RHEF* – 16V - High Temperature

RHEF200 2.0 3.8 16 —100 —1. 4 10.0 4.3 0.0450 0.07400 0.1100 0.205/24

RHEF300 3.0 6.0 16 —100 — 3.0 15.0 5.0 0.0330 0.05300 0.0790 0.520/20

RHEF400 4.0 7. 5 16 —100 — 3.3 20.0 5.0 0.0240 0.04000 0.0600 0.520/20

RHEF450 4.5 7. 8 16 —100 — 3.6 22.5 3.0 0.0220 0.03600 0.0540 0.520/20

RHEF550 5.5 10.0 16 —100 — 3.5 27.5 6.0 0.0150 0.02500 0.0370 0.520/20

RHEF600 6.0 10.8 16 —100 — 4.1 30.0 5.0 0.0130 0.02150 0.0320 0.520/20

RHEF650 6.5 12.0 16 —100 — 4.1 32.5 5.5 0.0110 0.01750 0.0260 0.520/20

RHEF700 7. 0 13.0 16 —100 — 4.0 35.0 7. 0 0.0100 0.01640 0.0250 0.520/20

RHEF750 7. 5 13.1 16 —100 — 4.5 37.5 7. 0 0.0094 0.01530 0.0220 0.520/20

RHEF800 8.0 15.0 16 —100 — 4.2 40.0 8.0 0.0080 0.01350 0.0200 0.520/20

RHEF900 9.0 16.5 16 —100 — 5.0 45.0 10.0 0.0074 0.01200 0.0170 0.520/20

RHEF1000 10.0 18.5 16 —100 — 5.3 50.0 9.0 0.0062 0.01050 0.0150 0.520/20

RHEF1100 11. 0 20.0 16 —100 — 5.5 55.0 11. 0 0.0055 0.00900 0.0130 0.520/20

RHEF1300 13.0 24.0 16 —100 — 6.9 65.0 13.0 0.0041 0.00690 0.0100 0.823/18

RHEF1400 14.0 27.0 16 —100 — 6.9 70.0 13.0 0.0030 0.00600 0.0090 0.823/18

RHEF1500 15.0 28.0 16 —100 —7. 0 75.0 20.0 0.0032 0.00613 0.0092 0.823/18

Typical Time-to-Trip Curves at 20°C

RHEF (data at 25°C)

A = RHEF050

B = RHEF070

C = RHEF100

D = RHEF200

E = RHEF300

F = RHEF400

G = RHEF450

H = RHEF550

I = RHEF600

J = RHEF650

K = RHEF700

L = RHEF750

M = RHEF800

N = RHEF900

O = RHEF1000

P = RHEF1100

Q = RHEF1300

R = RHEF1400

S = RHEF1500

Time-to-Trip (s)

Fault Current (A)

1000

100

10

1

0.1

0.01 11

01

00

ABCDEF

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CDEFGHIJKLMNOP QRS

A

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.

PolySwitch® Resettable PPTCs

Speciﬁcations are subject to change without notice.

Revised: 10/22/18

Radial Leaded > RHEF 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 125°C

Hold Current (A)

RHEF – 30V - High Temperature

RHEF050 0.68 0.62 0.56 0.51 0.50 0.44 0.40 0.36 0.34 0.28 0.12

RHEF070 0.95 0.87 0.79 0.72 0.70 0.62 0.56 0.51 0.47 0.39 0.17

RHEF100 1.36 1.24 1. 13 1.03 1. 0 0 0.89 0.80 0.73 0.67 0.56 0.24

RHEF – 16V - High Temperature

RHEF200 2.71 2.49 2.26 2.06 2.00 1.77 1.60 1.46 1.34 1. 11 0.49

RHEF300 4.07 3.74 3.41 3.09 3.00 2.65 2.40 2.21 2.00 1.66 0.74

RHEF400 5.57 5.11 4.65 4.22 4.00 3.62 3.29 3.01 2.73 2.27 1. 01

RHEF450 6.10 5.60 5.10 4.60 4.50 4.00 3.60 3.30 3.00 2.50 1. 10

RHEF550 7.47 6.86 6.24 5.66 5.50 4.85 4.41 4.04 3.66 3.05 1.36

RHEF600 8.20 7.50 6.80 6.20 6.00 5.30 4.90 4.40 4.00 3.30 1.50

RHEF650 8.80 8.10 7.40 6.70 6.50 5.70 5.30 4.80 4.30 3.60 1.60

RHEF700 9.51 8.73 7.95 7.20 7. 0 0 6.17 5.61 5.15 4.66 3.88 1.73

RHEF750 10.20 9.40 8.60 7.70 7.50 6.60 6.10 5.60 5.00 4.10 1.90

RHEF800 10.87 9.98 9.08 8.23 8.00 7.06 6.41 5.88 5.33 4.43 1.97

RHEF900 12.21 11. 19 10.16 9.26 9.00 7.97 7.20 6.56 6.04 5.01 2.19

RHEF1000 13.60 12.50 11.40 10.30 10.00 8.80 8.10 7.40 6.60 5.50 2.50

RHEF1100 14.94 13.72 12.49 11.31 11. 0 0 9.70 8.82 8.09 7.32 6.09 2.71

RHEF1300 17.70 16.30 14.80 13.40 13.00 11.40 10.50 9.60 8.60 7.20 3.30

RHEF1400 19.01 17.46 15.89 14.40 14.00 12.35 11.22 10.29 9.32 7. 7 6 3.45

RHEF1500 20.40 18.80 1 7. 1 0 15.50 15.00 13.20 12.10 11. 10 9.90 8.30 3.80

-40 -20 0604020 80 100120

% of Rated Hold and Tr ip Current

Ambient Temperature (˚C)

200

150

100

50

0

Temperature Rerating Curve

PolySwitch® Resettable PTCs

Speciﬁcations are subject to change without notice.

Revised: 10/22/18

Radial Leaded > RHEF Series

Physical Speciﬁcations

Lead Material

RHEF050 to RHEF200 : Tin-plated Copper-clad Steel, 0.205mm2 (24AWG), ø0.51mm/0.020in

RHEF300 to RHEF1100 : Tin-plated Copper, 0.52mm2 (20AWG), ø0.81mm/0.032in

RHEF1300 to RHEF1500 : Tin-plated Copper, 0.82mm2 (18AWG), ø1.0mm/0.04in

Soldering Characteristics Solderability per ANSI/J-STD-002 Category 3

Solder Heat Withstand per IEC 68-2-20, Test Tb, Method 1a, Condition b;

Can Wthstand 10s at 260°C ±5°C

Insulating Material Cured, Flame-retardant Epoxy Polymer; Meets UL 94V-0

Operation Temperature -40°C~125°C

Note: Devices are not designed to be placed through a reﬂow process.

Environmental Speciﬁcations

Test Conditions Resistance Change

Passive Aging 70°C, 1000 hrs

85°C, 1000 hrs

±5%

Humidity Aging 85°C, 85% R.H., 1000 hrs ±5%

Thermal Shock 125°C, -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.

PolySwitch® Resettable PPTCs

Speciﬁcations are subject to change without notice.

Revised: 10/22/18

Radial Leaded > RHEF Series

Dimensions and Weights

Part

Number

Dimensions in Millimeters (Inches)

Figure Device Mass (g)

(Only for Reference)

A B C D E F H J

Min Max Min Max Min Max Min Max Min Max Ty p Typ Ty p

RHEF – 30V - High Temperature

RHEF050 —7.4 —12.7 4.3 5.8 7.6 — — 3.0 1.2 — — 1,4,5 0.177

(0.29) (0.50) (0.17) (0.23) (0.30) (0.12) (0.05)

RHEF070 —6.9 —10.8 4.3 5.8 7.6 — — 3.0 1.2 1.24 1.2 2,4,5 0.259

(0.27) (0.43) (0.17) (0.23) (0.30) (0.12) (0.05) (0.049) (0.05)

RHEF100 —9.7 —13.6 4.3 5.8 7.6 — — 3.0 ———1,4,5 0.312

(0.38) (0.54) (0.17) (0.23) (0.30) (0.12)

RHEF – 16V - High Temperature

RHEF200 —9.4 —14.4 4.3 5.8 7.6 —— 3.1 — — — 1,4,5 0.278

(0.37) (0.57) (0.17) (0.23) (0.30) (0.12)

RHEF300 —8.8 —13.8 4.3 5.8 7.6 — — 3.0 1.2 — — 3,4,5 0.433

(0.35) (0.55) (0.17) (0.23) (0.30) (0.12) (0.05)

RHEF400 —10.0 —15.0 4.3 5.8 7.6 —— 3.0 1.2 1.24 1.6 3,4,5 0.509

(0.39) (0.59) (0.17) (0.23) (0.30) (0.12) (0.05) (0.049) (0.06)

RHEF450 —10.4 —15.6 4.3 5.8 7.6 — — 3.0 1.2 1.24 1.6 3,4,5 0.605

(0.41) (0.61) (0.17) (0.23) (0.30) (0.12) (0.05) (0.049) (0.06)

RHEF550 —11.2 —18.9 4.3 5.8 7.6 — — 3.0 1.2 — — 3,4,5 0.704

(0.44) (0.74) (0.17) (0.23) (0.30) (0.12) (0.05)

RHEF600 —11.2 —21.0 4.3 5.8 7.6 — — 3.0 1.2 1.24 1.7 3,4,5 0.792

(0.44) (0.83) (0.17) (0.23) (0.30) (0.12) (0.05) (0.049) (0.067)

RHEF650 —12.7 —22.2 4.3 5.8 7.6 — — 3.0 1.2 1.24 1.8 3,4,5 0.952

(0.50) (0.88) (0.17) (0.23) (0.30) (0.12) (0.05) (0.049) (0.07)

RHEF700 —14.0 —21.9 4.3 5.8 7.6 — — 3.0 1.2 — — 3,4,5 0.850

(0.55) (0.86) (0.17) (0.23) (0.30) (0.12) (0.05)

Figure 2

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Dimension Figures

PolySwitch® Resettable PTCs

Speciﬁcations are subject to change without notice.

Revised: 10/22/18

Radial Leaded > RHEF Series

Dimensions and Weights (Cont’d)

Part

Number

Dimensions in Millimeters (Inches)

Figure Device Mass (g)

(Only for Reference)

A B C D E F H J

Min Max Min Max Min Max Min Max Min Max Ty p Typ Typ

RHEF – 16V - High Temperature

RHEF750 —14.0 —23.5 4.3 5.8 7.6 — — 3.0 1.2 1.24 2.0 3,4,5 1.054

(0.55) (0.93) (0.17) (0.23) (0.30) (0.12) (0.05) (0.049) (0.08)

RHEF800 —16.5 —22.5 4.3 5.8 7.6 — — 3.0 1.2 — — 3,4,5 1.073

(0.65) (0.88) (0.17) (0.23) (0.30) (0.12) (0.05)

RHEF900 —16.5 —25.7 4.3 5.8 7.6 — — 3.0 1.2 — — 3,4,5 1.516

(0.65) (1.01) (0.17) (0.23) (0.30) (0.12) (0.05)

RHEF1000 —17.5 —26.5 9.4 10.9 7.6 — — 3.0 1.2 1.24 1.5 3,4,5 1.791

(0.69) (1.04) (0.37) (0.43) (0.30) (0.12) (0.05) (0.049) (0.06)

RHEF1100 —21.0 —26.1 9.4 10.9 7.6 — — 3.0 1.2 — — 3,4,5 1.570

(0.83) (1.03) (0.37) (0.43) (0.30) (0.12) (0.05)

RHEF1300 —23.5 —28.7 9.4 10.9 7.6 — — 3.6 1.4 1.45 1.9 3,4,5 2.257

(0.925) (1.13) (0.37) (0.43) (0.30) (0.14) (0.06) (0.057) (0.084)

RHEF1400 —23.5 —28.6 9.4 10.9 7.6 — — 3.6 1.4 — — 3,4,5 2.051

(0.925) (1.13) (0.37) (0.43) (0.30) (0.14) (0.06)

RHEF1500 —23.5 —28.7 9.4 10.9 7.6 — — 3.6 1.4 1.45 1.9 3,4,5 2.257

(0.925) (1.13) (0.37) (0.43) (0.30) (0.14) (0.06) (0.057) (0.084)

Figure 2

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Dimension Figures

PolySwitch® Resettable PPTCs

Speciﬁcations are subject to change without notice.

Revised: 10/22/18

Radial Leaded > RHEF Series

Packaging and Marking Information

Part

Number

Bag

Quantity

Tape and Reel

Quantity

Ammo Pack

Quantity

Standard Package

Quantity

Part

Marking

Agency

Recognition

RHEF – 30V - High Temperature

RHEF050 500 — — 10,000 H0.5 UL, CSA, TÜV

RHEF050-2 — 2,500 — 12,500 H0.5 UL, CSA, TÜV

RHEF070 500 — — 10,000 H0.7 UL, CSA, TÜV

RHEF070-2 — 2,500 — 12,500 H0.7 UL, CSA, TÜV

RHEF100 500 — — 10,000 H1 UL, CSA, TÜV

RHEF100-2 — 2,500 — 12,500 H1 UL, CSA, TÜV

RHEF – 16V - High Temperature

RHEF200 500 — — 10,000 H2 UL, CSA, TÜV

RHEF200-2 — 2,500 — 12,500 H2 UL, CSA, TÜV

RHEF200-AP — — 2,500 12,500 H2 UL, CSA, TÜV

RHEF300 500 — — 10,000 H3 UL, CSA, TÜV

RHEF300-2 — 2,000 — 10,000 H3 UL, CSA, TÜV

RHEF300-AP — — 2,000 10,000 H3 UL, CSA, TÜV

RHEF400 500 — — 10,000 H4 UL, CSA, TÜV

RHEF400-2 — 1,500 — 7,500 H4 UL, CSA, TÜV

RHEF400-AP — — 1,500 7,500 H4 UL, CSA, TÜV

RHEF450 500 — — 10,000 H4.5 UL, CSA, TÜV

RHEF450-2 — 1,500 — 7,500 H4.5 UL, CSA, TÜV

RHEF450-AP — — 1,500 7,500 H4.5 UL, CSA, TÜV

RHEF550 500 — — 10,000 H5.5 UL, CSA, TÜV

RHEF550-2 — 2,000 — 10,000 H5.5 UL, CSA, TÜV

RHEF550-AP — — 2,000 10,000 H5.5 UL, CSA, TÜV

RHEF600 500 — — 10,000 H6 UL, CSA, TÜV

RHEF600-2 — 2,000 — 10,000 H6 UL, CSA, TÜV

RHEF600-AP — — 2,000 10,000 H6 UL, CSA, TÜV

RHEF650 500 — — 10,000 H6.5 UL, CSA, TÜV

RHEF650-2 — 1,500 — 7,500 H6.5 UL, CSA, TÜV

RHEF650-AP — — 1,500 7,500 H6.5 UL, CSA, TÜV

RHEF700 500 — — 10,000 H7 UL, CSA, TÜV

RHEF700-2 — 1,500 — 7,500 H7 UL, CSA, TÜV

RHEF700-AP — — 1,500 7,500 H7 UL, CSA, TÜV

RHEF750 500 — — 10,000 H7.5 UL, CSA, TÜV

RHEF750-2 — 1,000 — 5,000 H7.5 UL, CSA, TÜV

RHEF750-AP — — 1,000 5,000 H7.5 UL, CSA, TÜV

RHEF800 500 — — 10,000 H8 UL, CSA, TÜV

RHEF800-2 — 1,000 — 5,000 H8 UL, CSA, TÜV

RHEF800-AP — — 1,000 5,000 H8 UL, CSA, TÜV

PolySwitch® Resettable PTCs

Speciﬁcations are subject to change without notice.

Revised: 10/22/18

Radial Leaded > RHEF Series

Packaging and Marking Information (Cont’d)

Part

Number

Bag

Quantity

Tape and Reel

Quantity

Ammo Pack

Quantity

Standard Package

Quantity

Part

Marking

Agency

Recognition

RHEF – 16V - High Temperature

RHEF900 250 — — 5,000 H9 UL, CSA, TÜV

RHEF900-2 — 1,000 — 5,000 H9 UL, CSA, TÜV

RHEF900-AP — — 1,000 5,000 H9 UL, CSA, TÜV

RHEF1000 250 — — 5,000 H10 UL, CSA, TÜV

RHEF1000-2 — 1,000 — 5,000 H10 UL, CSA, TÜV

RHEF1000-AP — — 1,000 5,000 H10 UL, CSA, TÜV

RHEF1100 250 — — 5,000 H11 UL, CSA, TÜV

RHEF1100-2 — 1,000 — 5,000 H 11 UL, CSA, TÜV

RHEF1100-AP — — 1,000 5,000 H 11 UL, CSA, TÜV

RHEF1300 250 — — 5,000 H13 UL, CSA, TÜV

RHEF1300-2 — 1,000 — 5,000 H13 UL, CSA, TÜV

RHEF1300-AP — — 1,000 5,000 H13 UL, CSA, TÜV

RHEF1400 250 — — 5,000 H14 UL, CSA, TÜV

RHEF1400-2 — 1,000 — 5,000 H14 UL, CSA, TÜV

RHEF1400-AP — — 1,000 5,000 H14 UL, CSA, TÜV

RHEF1500 250 — — 5,000 H15 UL, CSA, TÜV

RHEF1500-2 — 1,000 — 5,000 H15 UL, CSA, TÜV

RHEF1500-AP — — 1,000 5,000 H15 UL, CSA, TÜV

Part Ordering Number System

RHEF 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.

PolySwitch® Resettable PPTCs

Speciﬁcations are subject to change without notice.

Revised: 10/22/18

Radial Leaded > RHEF Series

Tape and Reel Speciﬁcations

RHEF 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 W18 -0.5/+1.0

Hold-Down Tape Width W411 Minimum

Top Distance between Tape Edges W63 Maximum

Sprocket Hole Position W59 -0.5/+0.75

Sprocket Hole Diameter D04 ± 0.2

Abscissa to Plane (Straight Lead) H 18.5 ± 2.5

Abscissa to Plane (Kinked Lead) (RHEF050 to RHEF1500) H016.0 ± 0.5

Abscissa to Top (RHEF050 to RHEF450) H132.2 Maximum

Abscissa to Top* (RHEF550 to RHEF1500) H145.0 Maximum

Overall Width with Lead Protrusion (RHEF050 to RHEF450) C143.2 Maximum

Overall Width with Lead Protrusion (RHEF550 to RHEF1500) C155 Maximum

Overall Width without Lead Protrusion (RHEF050 to RHEF450) C242.5 Maximum

Overall Width without Lead Protrusion (RHEF550 to RHEF1500) C254 Maximum

Lead Protrusion L11. 0 Maximum

Protrusion of Cut-out L 11 Maximum

Protrusion beyond Hold-down Tape I2Not Speciﬁed —

Sprocket Hole Pitch P012.7 ± 0.3

Device Pitch (RHEF050 to RHEF600) — 25.4 ± 0.61

Device Pitch (RHEF650 to RHEF1500) — 25.4 ± 0.6

Pitch Tolerance — 20 Consecutive ± 1

Tape Thickness T 0.9 Maximum

Overall Tape and Lead Thickness* (RHEF050 to RHEF1100) T12.0 Maximum

Overall Tape and Lead Thickness* (RHEF1300 to RHEF1500) T12.3 Maximum

Splice Sprocket Hole Alignment — 0 ± 0.3

Body Lateral Deviation h 0 ± 1.0

Body Tape Plane Deviation p 0 ± 1.3

Ordinate to Adjacent Component Lead (RHEF050 to RHEF900) P13.81 ± 0.7

Ordinate to Adjacent Component Lead (RHEF1000 to RHEF1500) P17.62 ± 0.7

Lead Spacing* (RHEF050 to RHEF900) F 5.05 ± 0.75

Lead Spacing* (RHEF1000 to RHEF1500) F 10.15 ± 0.75

Reel Width (RHEF050 to RHEF450) W256.0 Maximum

Reel Width* (RHEF550 to RHEF1500) W263.5 Maximum

Reel Diameter A 370.0 Maximum

Space between Flanges* (RHEF050 to RHEF450) W148.0 Maximum

Space between Flanges* (RHEF550 to RHEF1500) W155.0 Maximum

Arbor Hold Diameter C 26.0 ± 12.0

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.

PolySwitch® Resettable PTCs

Speciﬁcations are subject to change without notice.

Revised: 10/22/18

Radial Leaded > RHEF Series

w1

n

a

c

w2

Cross Section

Direction of

Unreeling

Reel

Type

Upper Side

Lower Side

Optional Shape: Circular or Polygonal

h

H1P1

D4

H0

H1

C1

C2

F

AB

Reference Plane

Direction of Unreeling

Cross Section A-B

W5

H

W

t

P0D0

I2

L

L1

hpp

Tape and Reel Diagrams

Figure 1

Figure 2

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.

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.