Power NTC Thermistor for Inrush Current Limiting Surge Suppression, Max. Current 5A, R25 3 Ohm, TDK Epcos ICL B57236S0309M000 Cross.

AMWEI Product Code: ICL11-3R5A

Appearance Dimension 

ICL Inrush Current Limit NTC Kinked Pin

ICL Inrush Current Limit NTC Kinked Pin

Unit: mm

  • Body Diameter D: 13 mm max
  • Body Thickness T: 5.5 mm max
  • Lead Length L1:  17 mm min
  • Lead Length L2:  8±2 mm
  • Lead Space F1: 7.5±1 mm
  • Lead Space F2: 5±1.5 mm
  • Lead Diameter d: 0.8±0.05 mm

NTC Thermistor Inrush Current Limiter 3 Ohm 5A Application

Inrush current limiting, e.g. in switch-mode power supplies, soft-start motors

NTC Thermistor Inrush Current Limiter 3 Ohm 5A Electric Characteristics Data

  • Resistance at 25C R25: 3 ohm+/-20%
  • Max. steady state current: 5A
  • Approximate resistance @ max. current: 0.100 ohm
  • Thermal Time Constant (in still air): 43 seconds.
  • Dissipation Coefficien:13 (mW/C)
  • Voltage Proof: AC1500V,1 minute.
  • Insulation resistance:  DC1000V , 1 minute, ≥500MΩ
  • Operating temperature range: -40 — +170C.
  • Beta Value (K): 2600 +/-10%

ICL NTC Thermistor Features:

Power NTC Thermistor Load Temperature Characteristics

Power NTC Thermistor Load Temperature Characteristics

  • Resin coated disk NTC thermistor with uninsulated lead-wires.
  • Suitable for both AC and DC circuits up to a voltage of 265 V(rms).
  • Excellent mechanical strength.
  • Suitable for PCB mounting.
  • Alternative to TDK Epcos NTC thermistors for inrush current limiting Series/Type: S236/**/M**, Ordering code: B57236S0309M000

NTC Thermistor Inrush Current Limiter 3 Ohm 5A Reliability Data

Test Item Standard Test Conditions Specifications
Lead wire tensile IEC 60068-2-21 Test Ua: Force 20N,
On 10 Seconds;
ΔR25/R25 <15%,
No visible damage
Solderability IEC 60068-2-20 245 ±3℃, 3 ± 0.3 sec At least 95% of terminal electrode is covered by new solder
Resistance to Soldering Heat IEC 60068-2-20 260 ± 3℃, 10 ± 1 sec ΔR25/R25 <15%,
No visible damage
Storage in dry heat IEC 60068-2-2 Storage at upper category  temperature
Temperature 170C
Time 1000h
ΔR25/R25 <20%,
No visible damage
Storage in damp heat, steady state IEC 60068-2-78 Temperature of air: 40C
Relative humidity of air: 93%
Duration: 21 days
ΔR25/R25 <20%,
No visible damage
Rapid change of temperature IEC 60068-2-14 Lower test temperature: -40C
t: 30 min
Upper test temperature: 170C
t: 30 min
Time to change from lower to
upper temperature: < 30 s
Number of cycles: 10
ΔR25/R25 <20%,
No visible damage
Endurance with
max. current
IEC 60539-1 Ambient temperature: 25 ±5C
t: 1000h
ΔR25/R25 <20%,
No visible damage
Cyclic endurance IEC 60539-1 I=Imax
On-time=1 min
Cooling time=6 min
Number of cycles: 1000
ΔR25/R25 <20%,
No visible damage

Inrush Current Limit NTC Thermistor Application Precautions

  • For inrush current limiting, the NTC thermistor must be connected in series with the load circuit. Several inrush current limiters can also be connected in series for higher damping.
    Inrush current limiters must NOT be connected in parallel.
  • In general inrush current limiters require time to get back to cold state, in which they can provide adequate inrush current limiting due to their high resistance. The cooling down time depends on ambient conditions.
  • It should be considered that the surrounding area of NTC thermistor may become quite hot. Ensure the adjacent components are placed at sufficient distance from a thermistor to allow for proper cooling time of the thermistor.
  • Make sure that adjacent materials are designed for operation at temperatures comparable to the surface temperature of the thermistor. Make sure that surrounding parts and materials can withstand this temperature.
  • Make sure that thermistor are adequately ventilated to avoid overheating.
  • Avoid contamination of the thermistor surface.
  • Avoid contact of NTC thermistor  with any liquids and solvents. Ensure that no water enters an NTC thermistor.

More information on ICLs NTC Cautions Warnings on Storage Handling Soldering Mounting Operation can be founded in Power NTC Thermistors for Inrush Current Limiting Surge Suppression.

Related AMWEI PTC NTC Thermistors Products for Current Surge Protection