Description
Ametherm SL15 40002 Thermistor 40 ohm 2 Amp Inrush Current Limiter
Thermistors are thermally sensitive resistors whose prime function is to exhibit a large, predictable and precise change in electrical resistance when subjected to a corresponding change in body temperature. Negative Temperature Coefficient (NTC) thermistors exhibit a decrease in electrical resistance when subjected to an increase in body temperature and Positive Temperature Coefficient (PTC) thermistors exhibit an increase in electrical resistance when subjected to an increase in body temperature. U.S. Sensor produces thermistors capable of operating over the temperature range of -100° to over +600° Fahrenheit. Because of their very predictable characteristics and their excellent long term stability, thermistors are generally accepted to be the most advantageous sensor for many applications including temperature measurement and control.
Mechanical Specifications (mm)
^D: 15.00
^T: 5.00
^Lead Diameter: 0.80
^S: 7.80
^L: 38.00
^Coating Run Down
^Straight Lead
^B: 4.00
^C: 43.50
Electrical Specifications
^Resistance: 40 20%
^Max Steady State Current up to 25c 2 A
^Max Recommended Energy 35 J
^Actual Energy Failure 70 J
^Max Capacitance @ 120 VAC: 0
^Max Capacitance @ 240 VAC: 0
^Max Capacitance @ 480 VAC: 0
^Max Capacitance @ 680 VAC: 0
^Resistance @ 100% Max Current: 0.3 ohm
^Resistance @ 50% Max Current: 0.9 ohm
^BodyTemperature @ Max Current 178c
^Dissipation Constant: 27 mw/c
^Thermal Time Constant: 48 mw/s
^Material Type (for Beta and Curve) G
RoHS Status Lead free / RoHS Compliant
Category Circuit Protection
Family Inrush Current Limiters (ICL) / Thermistors
Series SL15
Packaging Bulk
R @ 25°C 40 Ohm
Tolerance ±20%
Current – Steady State Max 2A
R @ Current 0.650 Ohm
Approvals UL
Online Catalog Standard SL Series
Other Names SL1540002 , SL15 40002
Surge currents that occur when electrical circuits are switched on can cause serious damage to sensitive electronic components if their rated current values are exceeded. Damaging surge currents can be prevented by placing an Inrush Current Limiting (ICL) thermistor in series with the load, thereby protecting critical parts of the circuit.
Connected in series with the load, at “switch-on” the Inrush Curent Limiting thermistor limits the current due to its relatively high cold resistance. As a result of current flow the thermistor self-heats – reducing its resistance value so that once the initial surge current has been safely held off, the resistance in the thermistor is maintained at a low value to maximise efficiency.
Features:
- Ambient operating temperature range -40°C to +150°C
- Recommended temperature range for 100% Imax is 0° to +65°C
- CSA approved (File No. CA 110861)
Applications
- Limit current inrush to PSUs and battery chargers.
- Lighting circuits & thermostat protection.
- Electric motor soft start.
Manufacturer:Ametherm
Datasheet:Ametherm/SL1540002.pdf
