Littelfuse VL User Manual

VL Series

POLYFUSE® Resettable PTCs

POLYFUSE® Resettable PTCs

Axial Lead Battery Strap Type > VL Series

Description

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

Features

• RoHS compliant and
lead–free

• Weldable Nickel terminals

• Slim, low profile design

Agency Approvals

AGENCY AGENCY FILE NUMBER

Applications

E183209

• Rechargeable battery cell

R50119583

protection

Electrical Characteristics

Maximum Time

d

Current

(A)

To Trip

Time

(Sec.)

Part Number

I

hold

(A)

I
(A)

V

trip

(Vdc)

max

I

(A)

max

P

max.

(W)

12VL170 1.70 4.10 12 100 1.4 8.50 5.00 0.018 0.032 0.064

12VL175L 1.75 4.20 12 100 1.4 8.75 5.00 0.017 0.031 0.062

12VL175XL 1.75 4.20 12 100 1.4 8.75 5.00 0.017 0.031 0.062

12VL230 2.30 5.00 12 100 1.5 10.00 5.00 0.012 0.018 0.036

I

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

hold

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

I

trip

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

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 20°C still air.

P

d

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

R

min

)

max

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

R

typ

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

R

1max

soldering of 260°C for 20 sec.

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

R

(Ω)

min

Resistance

R

typ

(Ω)

• Compact design saves
board space

• Low resistance

Agency

Approvals

R

1max

(Ω)

XX

XX

XX

XX

VL Series

© 2010 Littelfuse, Inc

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

125

Revised: June 4, 2010

VL Series

POLYFUSE® Resettable PTCs

Axial Lead Battery Strap Type > VL Series

Temperature Rerating

Ambient Operation Temperature

-40°C -20°C 0°C 25°C 40°C 50°C 60°C 70°C

Part Number Hold Current (A)

12VL170 3.5 2.9 2.4 1.70 1.2 1.0 0.7 0.3

12VL175L 3.5 2.9 2.4 1.75 1.3 1.0 0.8 0.3

12VL175XL 3.5 2.9 2.4 1.75 1.3 1.0 0.8 0.3

12VL230 5.0 4.2 3.4 2.30 1.7 1.3 0.9 0.4

Average Time Current Curves

1.70 A

2.30 A

1.75 A

10

1

Time in Seconds

0.1

0.01

1.0

10 100 1000

Current in Amperes

VL

Temperature Rerating Curve

220%

190%

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.

VL Series

Revised: June 4, 2010

126

© 2010 Littelfuse, Inc.

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

Specifications are subject to change without notice.