Littelfuse LR Series User Manual

Polyfuse, Resettable ptcs, Lr series

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113

Revised: June 4, 2010

POLYFUSE

®

Resettable PTCs

© 2010 Littelfuse, Inc

POLYFUSE

®

Resettable PTCs

LR Series

Axial Lead Battery Strap Type > LR Series

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

LR S

eries

LR Series

The new LR Series device provides reliable, noncycling
protection against overcharging and short circuits events
for rechargeable battery cells where resettable protection
is desired.

Agency Approvals

Electrical Characteristics

Part Number

I

hold

(A)

I

trip

(A)

V

max

(Vdc)

I

max

(A)

P

d

max.

(W)

Maximum Time

To Trip

Resistance

Agency

Approvals

Current

(A)

Time

(Sec.)

R

min

(Ω)

R

typ

(Ω)

R

1max

(Ω)

15LR190

1.9

3.9

15

100

1.2

9.50

5.00

0.039

0.072

0.102

X

X

15LR190S

1.9

3.9

15

100

1.2

9.50

5.00

0.039

0.072

0.102

X

X

15LR260

2.6

5.8

15

100

2.5

13.00

5.00

0.020

0.042

0.063

X

X

15LR260S

2.6

5.8

15

100

2.5

13.00

5.00

0.020

0.042

0.063

X

X

15LR380

3.8

8.3

15

100

2.5

19.00

5.00

0.013

0.026

0.037

X

X

20LR450

4.5

8.9

20

100

2.5

22.50

5.00

0.011

0.020

0.028

X

X

20LR550

5.5

10.5

20

100

2.8

27.50

5.00

0.009

0.016

0.022

X

X

20LR600

6.0

11.7

20

100

2.8

30.00

5.00

0.007

0.014

0.019

X

X

20LR730

7.3

14.1

20

100

3.3

30.00

5.00

0.006

0.012

0.015

X

X

I

hold

= Hold current: maximum current device will pass without tripping in 20°C still air.

I

trip

= Trip current: minimum current at which the device will trip in 20°C still air.

V

max

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

I

max

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

max

)

P

d

= Power dissipated from device when in the tripped state at 20°C still air.

R

min

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

R

typ

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

R

1max

= Maximum resistance of device at 20°C measured one hour after tripping or reflow

soldering of 260°C for 20 sec.

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

Description

Features

Applications

• RoHS compliant and

lead–free

• Weldable Nickel terminals
• Slim, low profile design

• Compact design saves

board space

• Low resistance
• Fast trip time

• Rechargeable battery cell

protection

• Portable Computers

• Camcorders

AGENCY

AGENCY FILE NUMBER

E183209

R50119583

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