NTC thermistors for
inrush current limiting
Leaded and coated disks, P27 series
Series/Type: B57127P0***M301
Date: November 2015
© EPCOS AG 2015. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
EPCOS AG is a TDK Group Company.
1) For details on the capacitance C
test
please refer to "Application notes", chapter 1.6.
Applications
Inrush current limiting, e.g. in switch-mode power
supplies, soft-start motors
Features
Leaded and coated NTC thermistors
Tinned copper wire, kinked
Coating material flame retardant to UL 94 V-0
Component marking includes the manufacturer's
logo, resistance value and date code
Highly stable electrical characteristics
Approvals
UL 1434 (file number E69802)
Options
Resistance tolerance <20% and alternative lead
configurations available on request
Delivery mode
Bulk
Dimensional drawing
Dimensions in mm
Approx. weight 10 g
General technical data
Climatic category (IEC 60068-1) 55/170/21
Max. power (at 25 °C) P
max
10.0 W
Resistance tolerance R
R
/R
R
±20 %
Rated temperature T
R
25 °C
Dissipation factor (in air) δ
th
approx. 50 mW/K
Thermal cooling time constant (in air) τ
c
approx. 200 s
Heat capacity C
th
approx. 10000 mJ/K
Electrical specification and ordering codes
R
25
I
test
A
I
max
(0 ...
25 °C)
A
C
test
1)
280 V AC
µF
C
test
1)
240 V AC
µF
C
test
1)
120 V AC
µF
Maximum
energy
J
R
min
(@ I
test
,
25 °C)
Ordering code
0.5 30 24 1300 3500 16000 200 0.011 B57127P0508M301
1 30 22 1300 3500 16000 200 0.013 B57127P0109M301
2 23 16 1300 3500 16000 200 0.022 B57127P0209M301
5 20 12 1300 3500 16000 200 0.033 B57127P0509M301
7 17 11 1300 3500 16000 200 0.045 B57127P0709M301
10 15 9 1300 3500 16000 200 0.058 B57127P0100M301
Inrush current limiters B57127P0***M301
ICLs P27
Page 2 of 19Please read Cautions and warnings and
Important notes at the end of this document.
Reliability data
Test Standard Test conditions R
25
/R
25
(typical)
Remarks
Storage in
dry heat
IEC
60068-2-2
Storage at upper
category temperature
T: 170 °C
t: 1000 h
< 20% No visible
damage
Storage in damp
heat, steady state
IEC
60068-2-78
Temperature of air: 40 °C
Relative humidity of air: 93%
Duration: 21 days
< 20% No visible
damage
Thermal schock IEC
60068-2-14
Lower test temperature: 55 °C
t: 30 min
Upper test temperature: 170 °C
t: 30 min
Time to change from lower to
upper temperature: < 30 s
Number of cycles: 10
< 20% No visible
damage
Endurance IEC
60539-1
Ambient temperature: 25 ±5 °C
I = I
max
t: 1000 h
< 20% No visible
damage
High current
endurance
Ambient temperature: 25 ±5 °C
I = I
test
t: 50 h
< 20% No visible
damage
Cyclic
endurance
IEC
60539-1
Ambient temperature: 25 ±5 °C
I = I
max
On-time = 1 min
Cooling time = 5 min
Number of cycles: 1000
< 20% No visible
damage
Maximum
permissible
capacitance test
IEC
60539-1
Ambient temperature: 25 ±5 °C
Capacitance = C
test
Number of cycles: 1000
< 20% No visible
damage
Note
The self-heating of a thermistor during operation depends on the load applied and the
applicable dissipation factor.
When loaded with maximum allowable current/power and the specified dissipation factor is
taken as a basis, the NTC thermistor may reach a mean temperature of up to 250 °C.
The heat developed during operation will also be dissipated through the lead wires. So the
contact areas, too, may become quite hot at maximum load.
When mounting NTC thermistors you have to ensure that there is an adequate distance
between the thermistor and all parts which are sensitive to heat or combustible.
Inrush current limiters B57127P0***M301
ICLs P27
Page 3 of 19Please read Cautions and warnings and
Important notes at the end of this document.

B57127P100M301

Mfr. #:
Manufacturer:
EPCOS / TDK
Description:
NTC THERMISTOR P27/10 /M
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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