B57237S229M54 EPCOS Inc, B57237S229M54 Datasheet - Page 8

CURRENT LIMITR INRSH 2.2 OHM 20%

B57237S229M54

Manufacturer Part Number
B57237S229M54
Description
CURRENT LIMITR INRSH 2.2 OHM 20%
Manufacturer
EPCOS Inc
Type
NTCr
Series
B57237r
Datasheet

Specifications of B57237S229M54

R @ 25°c
2.2 Ohm
Current - Steady State Max
7A
Tolerance
±20%
Diameter
0.59" (15mm)
Lead Spacing
0.295" (7.50mm)
Mounting Style
Through Hole
Pin Count
2
Thermal Time Constant
90s
Percentage Of Resistance Tolerance @ 25c
±20
Product Length (mm)
Not Requiredmm
Product Height (mm)
Not Requiredmm
Resistance
2.2 Ohms
Termination Style
Radial
Operating Temperature Range
- 55 C to + 170 C
Current Rating
7 Amps
Dimensions
15 mm Dia. x 7 mm W x 22 mm H
Power Rating
3.1 W
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
R @ Current
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
B57237S 229M 54
B57237S0229M054
Mounting instructions
1
1.1
Leaded thermistors comply with the solderability requirements specified by CECC.
When soldering, care must be taken that the NTC thermistors are not damaged by excessive
heat. The following maximum temperatures, maximum time spans and minimum distances have
to be observed:
Bath temperature
Soldering time
Distance from thermistor
Under more severe soldering conditions the resistance may change.
Solderability (test to IEC 60068-2-58)
Preconditioning: Immersion into flux F-SW 32.
Evaluation criterion: Wetting of soldering areas 95%.
Solder
SnAg (3.0 ... 4.0), Cu (0.5 ... 0.9)
1.1.1
Preconditioning: Immersion into flux F-SW 32.
Evaluation criterion: Leaching of side edges 1/3.
Solder
SnAg (3.0 ... 4.0), Cu (0.5 ... 0.9)
Please read Cautions and warnings and
Important notes at the end of this document.
Inrush current limiters
ICLs
Soldering
Leaded NTC thermistors
Resistance to soldering heat (test to IEC 60068-2-58)
Dip soldering
max. 260 C
max. 4 s
min. 6 mm
Page 8 of 15
Bath temperature ( C)
245 3
Bath temperature ( C)
260
Iron soldering
max. 360 C
max. 2 s
min. 6 mm
5
Dwell time (s)
3
Dwell time (s)
10
B57237
S237

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