2381 661 55411 Vishay BCcomponents, 2381 661 55411 Datasheet - Page 3

• Manufacturer Part Number: 2381 661 55411
• Manufacturer: Vishay BCcomponents

ELECTRICAL CHARACTERISTICS
I
I
PTC when passing from the low ohmic to high ohmic state at rated voltage.
When other voltages are present after tripping, the I
Voltages below V
TYPICAL TRIP-TIME AS A FUNCTION OF TRIP CURRENT RATIO
10
Trip-time or switching time (t
To check the trip-time for a specific PTC, refer to the Electrical Data and Ordering Information tables for the value I
overload or trip current by this I
0 and 70 °C. Adapt the correct non-trip current with the appropriate curve in the Current Deviation as a Function of the Ambient
Temperature graph. The relationship between the I
above graphs.
Example
What will be the trip-time at I
Overload current = 3 A; factor I
and I
Document Number: 29085
Revision: 06-Feb-07
t
max
10
s
MAX
10
-1
I
I
1
2
nt
nt
1
: 470 x 1.12 = 526 mA (at 0 °C).
as stated in the Electrical data and ordering information tables, is the maximum overload current that may flow through the
from the table: 470 mA at 25 °C
t
/I
AS A FUNCTION OF VOLTAGE
nt
= 5.70, the typical trip-time is 1.7 s.
2
rated
4
will allow higher overload currents to pass the PTC.
ol
= 3 A and T
t
s
/I
I
(%)
max
)
200
150
100
nt
80
6
nt
:
3
and you realize the factor I
/
0
0.526
For technical questions, contact: [e-mail]
= 5.70. In the typical trip-time as a function of trip current ratio graph, at the 8.5 mm line
amb
30 to 60 V PTC Thermistors
8
= 0 °C of a thermistor type 2381 661 54711; 2.5 Ω; Ø D
For Overload Protection
40
50
max
t
/I
nt
value can be derived from the above I
factor and the switching time is a function of the PTC diameter; see the
10
70
t
/I
nt
100
. This rule is valid for any ambient temperature between
12
2381 66. 5...1/PTCCL..H....BE
120
14
150
(1)
(2)
(3)
(4)
(5)
(6)
(7)
I
t
/I
nt
V
rated
Vishay BCcomponents
16
max
(%)
as a function of voltage graph.
Curve 1: ∅ D
Curve 2: ∅ D
Curve 3: ∅ D
Curve 4: ∅ D
Curve 5: ∅ D
Curve 6: ∅ D
Curve 7: ∅ D
Measured in accordance with
“IEC 60738”.
max
= 8.5 mm:
max
max
max
max
max
max
max
= 20.5 mm
= 16.5 mm
= 12.5 mm
= 10.5 mm
= 8.5 mm
= 7.0 mm
= 5.0 mm
www.vishay.com
nt
. Divide the
17