Ametherm BigAMP Thermistors / Inrush Current Limiters
Quick Overview
Ametherm BigAMP Thermistors
Ametherm BigAMP thermistors (Inrush Current Limiters0 absorbs high amounts of inrush current when electrical equipment is turned on by offering a high resistance to current and quickly decreasing in resistance once steady state current begins to flow through the thermistor. The bigAMP Inrush Current Limiters are specially designed thermistors able to withstand up to 36 amperes of continuous current and 260 joules of input energy. Applications include switching power supplies, AC motors, Uninterruptible Power Supplies, and frequency generators.
Details
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.
An NTC thermistor is an electrical resistor with a large negative temperature coefficient of resistance.
A Thermistor is useful for measuring temperature.
Used as electrical circuit components
for temperature compensation,
voltage regulation,
circuit protection,
time delay, and
volume control.
thermistor, thermistors, ntc thermistor
A Thermistor is a semiconducting ceramic composed of mixtures of several metal oxides.
bigAMP Inrush Current Limiters / Thermistors
The bigAMP Inrush Current Limiter absorbs high amounts of inrush current when electrical equipment is turned on by offering a high resistance to current and quickly decreasing in resistance once steady state current begins to flow through the thermistor.
In a switching power supply, the instantaneous surge energy is caused by the large input filter capacitors and AC input voltage.
During the absorption of energy, the initial high resistance of the thermistor drops within milliseconds to a negligible resistance in preparation of allowing high levels steady state current to flow with a minimal loss of power through the circuit.
The bigAMP Inrush Current Limiter will absorb up to 260 joules of input energy and carry 36 amperes of steady state current.
FEATURES
- 0.2Ω to 120Ω
- 3A to 36A SSI
- 65 joules to 250 joules
- 22mm to 32mm in diameter
- High current
- UL and CSA certified
The bigAMP Inrush Current Limiter is useful in:
- Switching Power Supplies
- AC Motors
- Uninterruptible Power Supplies
- Variable Frequency Drive
- Other equipment that can be improved with inrush current protection
| Part Number (PDF) | UL | CSA | Resistance @ 25 °C | Joules Max | SSI Max | Max Cap 120 VAC | Max Cap 240 VAC | D Max (mm) | T Nom (mm) |
|---|---|---|---|---|---|---|---|---|---|
| SL32 0R230 | UL | 0.3 | 100 | 30 | 6,946 | 1,736 | 31 | 6.0 | |
| SL32 0R530 | CSA | 0.5 | 150 | 30 | 10,419 | 2,604 | 31 | 5.0 | |
| SL32 0R536 | CSA | 0.5 | 150 | 36 | 17,366 | 4,341 | 31 | 5.0 | |
| SL32 1R030 | UL | CSA | 1.0 | 160 | 30 | 11,114 | 2,778 | 31 | 5.0 |
| SL32 1R036 | CSA | 1.0 | 160 | 36 | 11,114 | 2,778 | 31 | 6.0 | |
| SL32 2R023 | UL | CSA | 2.0 | 250 | 23 | 17,366 | 4,341 | 31 | 6.0 |
| SL32 2R025 | UL | CSA | 2.0 | 250 | 25 | 20,839 | 5,209 | 31 | 7.0 |
| SL32 4R023 | UL | 4.0 | 200 | 23 | 13,893 | 3,473 | 31 | 6.3 | |
| SL32 5R020 | UL | CSA | 5.0 | 200 | 20 | 13,893 | 3,473 | 31 | 6.0 |
| SL32 10015 | UL | CSA | 10.0 | 150 | 15 | 10,419 | 2,604 | 31 | 6.0 |
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