Littelfuse 30R User Manual

30R Series

POLYFUSE® Resettable PTCs

Radial Leaded > 30R Series

Description

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provide overcurrent protection for low voltage (≤30V)
applications where space is not a concern and resettable
protection is preferred.

Features

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epoxy polymer insulating
material meets UL 94V-0
requirements

Agency Approvals

AGENCY AGENCY FILE NUMBER

E183209

Applications

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and peripherals

R50119318

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Electrical Characteristics

Part Number

I

hold

(A)

I
(A)

trip

V

max

(Vdc)

I

(A)

max

P
typ.
(W)

d

Current

Maximum Time

To Trip

Time

(A)

(Sec.)

30R090 0.90 1.80 30 40 0.6 4.50 5.90 0.070 0.220

30R110 1.10 2.20 30 40 0.7 5.50 6.60 0.050 0.170

30R135 1.35 2.70 30 40 0.8 6.75 7.30 0.040 0.130

30R160 1.60 3.20 30 40 0.9 8.00 8.00 0.030 0.110

30R185 1.85 3.70 30 40 1.0 9.25 8.70 0.030 0.090

30R250 2.50 5.00 30 40 1.2 12.50 10.30 0.020 0.070

30R300 3.00 6.00 30 40 2.0 15.00 10.80 0.020 0.080

30R400 4.00 8.00 30 40 2.5 20.00 12.70 0.010 0.050

30R500 5.00 10.00 30 40 3.0 25.00 14.50 0.010 0.050

30R600 6.00 12.00 30 40 3.5 30.00 16.00 0.005 0.040

30R700 7.00 14.00 30 40 3.8 35.00 17.50 0.005 0.030

30R800 8.00 16.00 30 40 4.0 40.00 18.80 0.005 0.020

30R900 9.00 18.00 30 40 4.2 40.00 20.00 0.005 0.020

I

= Hold current: maximum current device will pass without tripping in 23°C still air.

hold

= Trip current: minimum current at which the device will trip in 23°C still air.

I

trip

= Maximum voltage device can withstand without damage at rated current (I

V

max

= Maximum fault current device can withstand without damage at rated voltage (V

I

max

= Power dissipated from device when in the tripped state at 23°C still air.

P

d

)

max

R

= Minimum resistance of device in initial (un-soldered) state.

min

= Maximum resistance of device at 23°C measured one hour after tripping.

R

1max

Caution: Operation beyond the specified rating may result in damage and possible arcing
and flame.

)

max

Resistance

R

min

(Ω)

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Free and Halogen-Free*

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Agency

Approvals

R

1max

(Ω)

XX

XX

XX

XX

XX

XX

XX

XX

XX

XX

XX

XX

XX

30R Series

* Effective January 1, 2010, all 30R PTC products will be manufactured Halogen Free (HF). Existing Non-Halogen Free 30R PTC products may continue to be sold, until supplies are depleted.

© 2010 Littelfuse, Inc

Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/30R.html for current information.

75

Revised: July 12, 2010

30R Series

POLYFUSE® Resettable PTCs

Radial Leaded > 30R Series

Temperature Rerating

Ambient Operation Temperature

-40°C -20°C 0°C 23°C 40°C 50°C 60°C 70°C 85°C

Part Number

30R090 1.31 1.17 1.04 0.90 0.75 0.69 0.61 0.55 0.47

30R110 1.60 1.43 1.27 1.10 0.91 0.85 0.75 0.67 0.57

30R135 1.96 1.76 1.55 1.35 1.12 1.04 0.92 0.82 0.70

30R160 2.32 2.08 1.84 1.60 1.33 1.23 1.09 0.98 0.83

30R185 2.68 2.41 2.13 1.85 1.54 1.42 1.26 1.13 0.96

30R250 3.63 3.25 2.88 2.50 2.08 1.93 1.70 1.53 1.30

30R300 4.35 3.90 3.45 3.00 2.49 2.31 2.04 1.83 1.56

30R400 5.80 5.20 4.60 4.00 3.32 3.08 2.72 2.44 2.08

30R500 7.25 6.50 5.75 5.00 4.15 3.85 3.40 3.05 2.60

30R600 8.70 7.80 6.90 6.00 4.98 4.62 4.08 3.66 3.12

30R700 10.15 9.10 8.05 7.00 5.81 5.39 4.76 4.27 3.64

30R800 11.60 10.40 9.20 8.00 6.64 6.16 5.44 4.88 4.16

30R900 13.05 11.70 10.35 9.00 7.47 6.93 6.12 5.49 4.68

Hold Current (A)

Average Time Current Curves

0.90A

1.10A

1.35A

1.60A

1.85 A

2.50A

100000

10000

1000

100

10

Time in Seconds

1

0.1

0.01

0.1 1 10 100

3.00A

Current in Amperes

4.00A

5.00A

6.00A

7.00A

8.00A

9.00A

30R

Temperature Rerating Curve

170%

150%

130%

110%

90%

70%

50%

Percentage of Rated Current

30%

10%

-40 -30 -20 -10 0 10 20 30 40 50 60 70 80

Temperature (°C)

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.

30R Series

Revised: July 12, 2010

76

Please refer to www.littelfuse.com/series/30R.html for current information.

Specifications are subject to change without notice.

© 2010 Littelfuse, Inc.

Soldering Parameters - Wave Soldering

Refer to the condition recommended

Pre-Heating Zone

by the flux manufacturer.

Max. ramping rate should not exceed
4°C/Sec.

POLYFUSE® Resettable PTCs

Radial Leaded > 30R Series

260

220

Soldering Cooling

Soldering Zone

Max. solder temperature should not
exceed 260°C

Cooling Zone Cooling by natural convection in air.

Physical Specifications

Lead Material

Soldering
Characteristics

Insulating Material

Device Labeling

0.90-2.50A: Tin-plated Copper clad steel

3.00-9.00A: Tin-plated Copper

Solderability per MIL–STD–202,
Method 208E

Cured, flame retardant epoxy polymer
meets UL94V-0 requirements.

Marked with ‘LF’, voltage, current rating,
and date code.

190

160

Temperature (°C)

0

Preheating

60 min.

5 max.

Time(s)

Environmental Specifications

Operating/Storage
Temperature

Maximum Device Surface
Temperature in Tripped State

Passive Aging

Humidity Aging

Thermal Shock

Solvent Resistance

-40°C to +85°C

125°C

+85°C, 1000 hours

-/+5% typical resistance
change

+85°C, 85% R.H., 1000 hours

-/+5% typical resistance
change

+85°C to -40°C 10 times

-/+5% typical resistance
change

MIL–STD–202, Method 215F
No change

30R Series

© 2010 Littelfuse, Inc

Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/30R.html for current information.

Moisture Resistance Level Level 1, J–STD–020C

77

Revised: July 12, 2010

30R Series