B57237S220M51 EPCOS Inc, B57237S220M51 Datasheet - Page 8

• Manufacturer Part Number: B57237S220M51
• Description: CURRENT LIMITER INRSH 22 OHM 20%
• Manufacturer: EPCOS Inc
• Type: NTCr
• Series: B57237r

Specifications of B57237S220M51

• Tolerance: ±20%
• Lead Spacing: 0.295" (7.50mm)
• R @ 25°c: 22 Ohm
• Current - Steady State Max: 2.8A
• Diameter: 0.59" (15mm)
• Resistance: 22 Ohms
• Termination Style: Radial
• Operating Temperature Range: - 55 C to + 170 C
• Current Rating: 2.8 Amps
• Dimensions: 15 mm Dia. x 7 mm W x 22 mm H
• Power Rating: 3.1 W
• Thermistor Type: NTC
• Thermistor Tolerance: ± 20%
• Beta Value (k): 3300K
• Thermistor Case Style: Radial Leaded
• No. Of Pins: 2
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• R @ Current: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: B57237S 220M 51; B57237S0220M051

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
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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