The Allen-Bradley/Rockwell Automation 140G-J3F3-D15 molded case circuit breaker is an adjustable thermal/magnetic type of molded case circuit breaker from the Bulletin 140G series. It comes with a Size J frame, 3 poles, and bolt-on end cap terminals. The adjustable thermal trip range for the 140G-J3F3-D15 molded case circuit breaker is from 105 to 150 Amps and the adjustable magnetic trip range is from 750 to 1500 Amps. It supports an interrupting rating of 35 kiloamps. The 140G-J3F3-D15 molded case circuit breaker can be installed on a DIN Rail or in a cabinet in any required position.
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Manufacturer | Eaton Cutler-Hammer |
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Brand | Eaton Cutler-Hammer |
Part Number/Catalog No. | 140G-J3F3-D15 |
Product Type | Molded Case Circuit Breaker |
Frame | J |
Amps | 250 |
Interrupting Rating | 35 kA |
Protection Type | Adjust Thermal/ Adjust Magnetic |
Current Range | 150 A |
Rated Insulation Voltage | 1000V |
Rated Impulse Withstand Voltage | 8 kV |
Weight | 5.51 lb |
Mechanical Life | 240 Operations/hr. |
Electrical Life | 120 Operations/ hr. |
The Allen-Bradley/Rockwell Automation 140G-J3F3-D15 circuit breaker is a 3-phase circuit breaker. It has a current range rating of 150 Amps, it supports a maximum voltage of 600 Volts AC, and has a breaking capacity or interrupting capacity of 35 kiloAmps at a voltage of 480 Volts AC. The interrupt capacity of a breaker is the amount of fault current that it can safely interrupt without damaging itself. The 140G-J3F3-D15 circuit breaker has an adjustable thermal/adjustable magnetic trip unit. Note that the trip unit is the brain of the breaker. The unit functions by tripping the operating mechanism when a short circuit occurs or when there is an extended overload current.
The Allen-Bradley 140G-J3F3-D15 circuit breaker’s trip unit uses a temperature-sensitive device combined with an electromagnetic device to provide protection to the electrical circuits. For the frequency, the 140G-J3F3-D15 circuit breaker retains the same tripping functionalities when it is used in a system with a frequency of either 50 Hertz or 60 Hertz. However, with higher frequency systems, the 140G-J3F3-D15 circuit breaker may need to be derated to recalibrate. The 140G-J3F3-D15 circuit breaker has 3 poles, indicating that it supports 3-phase distribution systems. The 140G-J3F3-D15 circuit breaker has a molded case and its maximum operating ambient temperature is rated at 40 degrees Celsius. Note that the reliability of the 140G-J3F3-D15 circuit breaker can be highly affected by extreme differences in the surrounding temperature since the breaker’s trip unit is temperature-sensitive. For example, at an ambient temperature above 40 degrees Celsius, nuisance tripping is likely to occur and dangerous temperatures may be present at the breaker terminals.
Revision Part # | Also known as | |
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140G-J3F3-D15 Ser A | 140G-J3F3-D15/A, Series A, Rev A | Request a quote |
Don't see your particular revision? Contact us now. |
The Allen-Bradley 140G-J3F3-D15 Molded Case Circuit Breaker has a J Frame and 250 Amps. It also has a 35 kA Interrupting Rating and 3 Poles.