B57364S209M EPCOS Inc, B57364S209M Datasheet - Page 12

• Manufacturer Part Number: B57364S209M
• Description: CURRENT LIMITER INRSH 2 OHM 20%
• Manufacturer: EPCOS Inc
• Type: NTCr

Specifications of B57364S209M

• Lead Spacing: 0.295" (7.50mm)
• R @ 25°c: 2.0 Ohm
• Current - Steady State Max: 12A
• Tolerance: ±20%
• Diameter: 0.825" (21mm)
• Thermistor Type: NTC
• Resistance: 2ohm
• Beta Value (k): 2900
• Svhc: No SVHC (18-Jun-2010)
• Beta Value Lower Limit Temperature: 25°C
• Body Diameter: 21mm
• Current Max: 12A
• Lead Length: 32mm
• Termination Style: Radial
• Operating Temperature Range: - 55 C to + 170 C
• Current Rating: 12 Amps
• Power Rating: 5.1 W
• Mounting Style: Through Hole
• Pin Count: 2
• Thermal Time Constant: 100s
• Percentage Of Resistance Tolerance @ 25c: ±20
• Accuracy: ±3
• Product Length (mm): Not Requiredmm
• Product Height (mm): Not Requiredmm
• Thermistor Tolerance: ± 20%
• 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: 495-4114; B57364S 209M; B57364S0209M000; B57364S0209M000; Q1848236; Q3180393; Q3247542

Mounting
Operation
Please read Cautions and warnings and
Important notes at the end of this document.
Inrush current limiters
ICLs
When NTC thermistors are encapsulated with sealing material or overmolded with plastic
material, the precautions given in chapter “Mounting instructions”, “Sealing and potting” must
be observed.
Electrode must not be scratched before/during/after the mounting process.
Contacts and housings used for assembly with thermistor have to be clean before mounting.
During operation, the inrush current limiters surface temperature can be very high. Ensure that
adjacent components are placed at a sufficient distance from the thermistor to allow for proper
cooling of the thermistors.
Ensure that adjacent materials are designed for operation at temperatures comparable to the
surface temperature of the thermistor. Be sure that surrounding parts and materials can
withstand this temperature.
Make sure that inrush current limiters are adequately ventilated to avoid overheating.
Avoid contamination of thermistor surface during processing.
Use thermistors only within the specified operating temperature range.
Use inrush current limiters only within the specified voltage and current ranges.
Environmental conditions must not harm the thermistors. Use thermistors only in normal
atmospheric conditions.
Contact of NTC thermistors with any liquids and solvents should be prevented. It must be
ensured that no water enters the NTC thermistor (e.g. through plug terminals). For
measurement purposes (checking the specified resistance vs. temperature), the component
must not be immersed in water but in suitable liquids (e.g. Galden).
In case of exposure of the NTC thermistors to water, electrolytes or other aggressive media,
these media can penetrate the coating and reach the surface of the ceramic. Low-ohmic or
high-ohmic behavior may occur due to the formation of an electrolyte with metals (silver/lead/tin
from metallization or solder). Low-ohmic behavior is caused by electrochemical migration,
high-ohmic behavior by dissolving of the electrode. Ineither case, the functionality of the NTC
thermistorscannot be assured.
Be sure to provide an appropriate fail-safe function to prevent secondary product damage
caused by malfunction (e.g. use a metal oxide varistor for limitation of overvoltage condition).
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