Allen Bradley 140MF8EC32 140M-F8E-C32 - 32A 3 Pole Motor Protection Circuit Breaker
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Allen Bradley 140M-F8E-C32 - 32A 3 Pole Motor Protection Circuit Breaker
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Description
Engineered for demanding motor control centers, this Allen Bradley 32A protector provides comprehensive thermal-magnetic defense. It features an adjustable thermal setting from 23-32A alongside a fixed magnetic trip, ensuring precise response to overloads. It installs onto standard DIN rail systems and is optimized for use with Bulletin 100 contactors. For facility upgrades, this model is officially replaced by the 140MT-F9E-C32. It delivers a 65 kAIC rating at 480Y/277VAC.Specifications
| Brand | Allen Bradley |
|---|---|
| Part Number | 140MF8EC32 |
| Series | 140M |
| Amperage | 32A |
| Poles | 3 |
| Mounting Style | DIN Rail |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 30kA @ 600Y/347VAC |
| Amperage Range | 23-32A |
|---|
| Terminal Type | Screw/Clamp Terminal |
|---|---|
| For Use With | Bulletin 100 Contactors, Motor Control Centers |
| Wire Gauge | 14-4 AWG |
| Max Wire | 4 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable Thermal, Fixed Magnetic |
| Available Options | Auxiliary Switch, Shunt Trip, Undervoltage Release, Busbar System |
|---|---|
| Standards | CSA C22.2 No. 14, IEC 60947-2, IEC 60947-4-1, UL 508 |
| Approval | CCC, CE, CSA, cULus, GOST, UL |
| Temp Rating | -25C to 60C |
| Construction Features | Phase Loss Protection, Current Limiting |
Product FAQs
7 answersWhich contactors are compatible with the 140M-F8E-C32 motor protection circuit breaker?
This F-frame breaker is designed to integrate directly with Allen Bradley Bulletin 100 contactors for building complete motor starters in motor control centers.
What is the thermal adjustment range for the 140M-F8E-C32?
The thermal trip unit is adjustable from 23 to 32 Amps. This allows panel builders to fine-tune the overload protection to match the specific full load amps (FLA) of the connected motor.
What is the magnetic trip setting on this F-frame breaker?
The 140M-F8E-C32 features a fixed magnetic trip set at 13 times the rated operational current (13 x Ie). This provides instantaneous short-circuit protection without nuisance tripping during normal motor startup inrush.
What is the overload trip class for this motor protection circuit breaker?
The 140M-F8E-C32 provides Class 10 thermal overload protection, meaning it is designed to trip within 10 seconds under locked rotor conditions.
What does the F8E designate in the 140M-F8E-C32 catalog number?
In Allen Bradley nomenclature, the F indicates the frame size, and the 8E signifies that it is a high breaking capacity model. This high performance rating allows it to achieve up to 65kAIC at 480VAC.
How is the 140M-F8E-C32 mounted in a control panel?
The breaker mounts directly onto a standard 35mm DIN rail (top hat rail). It utilizes screw and clamp terminals that accept 14 to 4 AWG wire for secure connections in industrial environments.
Is there a direct replacement for the legacy 140M-F8E-C32?
Yes. For facility upgrades or new panel builds, the 140M-F8E-C32 is officially replaced by the newer Allen Bradley 140MT-F9E-C32 motor protection circuit breaker.
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