B57238S0509M000 datasheet(2/14 Pages) EPCOS

Part #	B57238S0509M000

Description	NTC thermistors for inrush current limiting Leaded and coated disks

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Manufacturer	EPCOS [EPCOS]

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1) For details on the capacitance Ctest as well as on the parameters k and n refer to "Application notes", chapters 1.6 and 1.7.

Applications

Switch-mode power supplies

Soft-start motors, e.g. in vacuum cleaners

Features

Useable in series connections

up to 265 VRMS

Coated thermistor disk for line applications

Kinked leads of tinned copper wire

Wide resistance range

UL approval (E69802)

Options

Resistance tolerance <20% and alternative lead

configurations available on request

Delivery mode

Bulk (standard) or with cardboard tape on 500-mm reel

Dimensional drawing

Dimensions in mm

Approx. weight 3 g

General technical data

Climatic category

(IEC 60068-1)

55/170/21

Max. power

(at 25

°C)

Pmax

3.9

W

Resistance tolerance

∆R

R/RR

±20

%

Rated temperature

TR

25

°C

Dissipation factor

(in air)

δ

th

approx. 20

mW/K

Thermal cooling time constant

(in air)

τ

c

approx. 80

s

Heat capacity

Cth

approx. 1600

mJ/K

Electrical specification and ordering codes

R25

Ω

Imax

(0...65

°C)

A

B25/100

K

Ctest1)

230 V AC

µF

Ctest1)

110 V AC

µF

Param.

for R(I)1)

k

Param.

for R(I)1)

n

Ordering code

** = Delivery mode

00 = Bulk

51 = Reel packing

2.5

8.4

2800

700

2800

0.984

1.36

B57238S0259M0**

3

7.4

2900

700

2800

1.04

1.36

B57238S0309M0**

4.7

6.6

2965

700

2800

1.20

1.37

B57238S0479M0**

5

6.4

2965

700

2800

1.23

1.37

B57238S0509M0**

7

6.0

2965

700

2800

1.34

1.38

B57238S0709M0**

8

5.5

3065

700

2800

1.40

1.39

B57238S0809M0**

10

5.0

3065

700

2800

1.50

1.39

B57238S0100M0**

15

4.4

3165

700

2800

1.67

1.40

B57238S0150M0**

16

4.0

3165

700

2800

1.69

1.39

B57238S0160M0**

Inrush current limiters

B57238S0***M0**

ICLs

S238

Page 2 of 14

Please read Cautions and warnings and

Important notes at the end of this document.

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