B57237S0709M000 datasheet(2/14 Pages) EPCOS

Part #	B57237S0709M000

Description	NTC thermistors for inrush current limiting

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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

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 2 g

General technical data

Climatic category

(IEC 60068-1)

55/170/21

Max. power

(at 25

°C)

Pmax

3.1

W

Resistance tolerance

∆R

R/RR

±20

%

Rated temperature

TR

25

°C

Dissipation factor

(in air)

δ

th

approx. 17

mW/K

Thermal cooling time constant

(in air)

τ

c

approx. 90

s

Heat capacity

Cth

approx. 1530

mJ/K

Electrical specification and ordering codes

R25

Ω

Imax

(0...25

°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

1

9.0

2700

700

2800

0.622

1.27

B57237S0109M0**

2.2

7.0

2800

700

2800

0.806

1.30

B57237S0229M0**

2.5

6.5

2800

700

2800

0.843

1.30

B57237S0259M0**

4.7

5.1

2900

700

2800

1.03

1.32

B57237S0479M0**

5

5.0

2900

700

2800

1.05

1.32

B57237S0509M0**

7

4.2

3000

700

2800

1.16

1.33

B57237S0709M0**

10

3.7

3060

700

2800

1.29

1.34

B57237S0100M0**

15

3.0

3000

700

2800

1.49

1.33

B57237S0150M0**

22

2.8

3300

700

2800

1.57

1.37

B57237S0220M0**

Inrush current limiters

B57237S0***M0**

ICLs

S237

Page 2 of 14

Please read Cautions and warnings and

Important notes at the end of this document.

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