Eaton / Cutler-Hammer EC3070 Molded Case Circuit Breaker
- 70A
- 3 Pole
- Bolt-On
Quantity
Eaton / Cutler-Hammer EC3070 - 70A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Designed for industrial power distribution, this 70-amp, three-pole Eaton MCCB provides robust overcurrent defense. The fixed thermal-magnetic trip operates within 240VAC environments. Installation utilizes a bolt-on design compatible with Cutler-Hammer MP200, MP100, and CS5 panelboards. For facilities updating infrastructure, this model crosses over to the EHD3070. With a 10kAIC rating, it ensures safe fault clearing. The breaker accommodates 14-1/0 AWG wire and is HACR rated.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | EC3070-R |
| Series | EC |
| Amperage | 70A |
| 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, Non-Interchangeable Trip |
Product FAQs
6 answersWhich panelboards accept the EC3070 circuit breaker?
This bolt-on breaker is compatible with Cutler-Hammer CS5, MP40, MP100, and MP200 panelboards, as well as EE switchboards.
What is the current Eaton replacement for the legacy EC3070?
For facilities updating older panels, the legacy EC3070 crosses over to the modern Eaton EHD3070 molded case circuit breaker.
What wire gauge is supported by the terminals on this breaker?
The load side lugs accept 14 AWG to 1/0 AWG copper or aluminum (Cu/Al) conductors.
Is the EC3070 rated for HVAC equipment?
Yes, this breaker is HACR rated, making it suitable for heating, air conditioning, and refrigeration applications.
How does the thermal-magnetic trip unit function on this breaker?
The fixed thermal element provides long-time protection against sustained overloads, while the magnetic element offers instantaneous protection to quickly clear short circuits.
What frame group does the EC3070 belong to?
It is part of the legacy Westinghouse E Frame group, which dictates its physical dimensions and mounting compatibility within older Cutler-Hammer and Westinghouse enclosures.
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