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Eaton / Cutler-Hammer EC3050 Molded Case Circuit Breaker
- 50A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
EC3050
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
EC3050
Quantity
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Eaton / Cutler-Hammer EC3050 - 50A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for 240VAC commercial applications, the Eaton EC3050 provides robust thermal-magnetic protection. This three-pole, 50-amp MCCB features fixed trip units to handle overloads effectively. Designed as a bolt-on solution, it installs into Cutler-Hammer CS5, MP40, and MP100 panelboards. This legacy Westinghouse E-Frame unit is officially replaced by the EHD3050 model for modern upgrades. Rated at 10kAIC, this HACR-rated breaker is suitable for HVAC equipment and includes load-side lugs.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | EC3050-R |
| Series | EC |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Cutler-Hammer CS5 Panelboards, MP40 Panelboards, MP100 Panelboards, MP200 Panelboards, EE Switchboards |
| Wire Gauge | 14-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | NEMA AB 1, UL 489 |
| Approval | UL |
| Temp Rating | 40°C |
| Construction Features | HACR Rated, HID Rated, Non-Interchangeable Trip |
Product FAQs
4 answersWhich panelboards and switchboards are compatible with the EC3050 breaker?
This bolt-on breaker is designed for use in Cutler-Hammer CS5, MP40, MP100, and MP200 panelboards, as well as EE switchboards.
What wire sizes and materials are accepted by the terminals on the EC3050?
The factory-installed lugs accept wire gauges from 14 AWG up to 1/0 AWG. The terminals are rated for both copper (Cu) and aluminum (Al) conductors.
Can the EC3050 replace older Westinghouse E-frame breakers?
Yes, the EC3050 is part of the legacy Westinghouse E-frame family. Eaton acquired Cutler-Hammer and Westinghouse distribution equipment, so this breaker serves as a direct replacement for older E-frame models with matching specifications.
How does the fixed thermal-magnetic trip unit operate on this breaker?
The EC3050 features a fixed Long-Time and Instantaneous (LI) trip function. The thermal element provides inverse time delay for overload protection, while the magnetic element provides instantaneous tripping for short circuits. Both settings are factory fixed and non-adjustable.
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