Eaton / Cutler-Hammer GDB3070D Molded Case Circuit Breaker
- 70A
- 3 Pole
- Unit Mount
Eaton / Cutler-Hammer
GDB3070D
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
GDB3070D
Quantity
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Eaton / Cutler-Hammer GDB3070D - 70A 3 Pole Molded Case Circuit Breaker
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Description
Designed to handle demanding commercial loads, the GDB3070D provides robust overcurrent protection. This 3-pole, 70A molded case circuit breaker is part of the Eaton Series C family. It installs into Eaton Series C panelboards, switchboards, and motor control centers. The unit-mount design ensures a secure connection within compatible G-frame enclosures. Rated for 65kAIC at 240VAC, this breaker features fixed thermal-magnetic trip units and is HACR rated.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | GDB3070D |
| Series | GDB |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 125/250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 14kA @ 480VAC, 10kA @ 250VDC |
| Terminal Type | Stud/Tapped Pad |
|---|---|
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| 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 |
|---|---|
| Accessories | Mounting Hardware |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Current Limiting, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
7 answersWhich panelboards and enclosures are compatible with the GDB3070D?
This breaker is designed for use in Eaton Series C panelboards, switchboards, and motor control centers that accept G-frame circuit breakers.
Can the Eaton GDB3070D replace older Westinghouse or Cutler-Hammer breakers with the same part number?
Yes. Eaton acquired the Cutler-Hammer and Westinghouse distribution equipment lines. The GDB3070D is a direct replacement for legacy Westinghouse and Cutler-Hammer breakers sharing the exact same catalog number.
Is the GDB3070D suitable for use in DC circuits?
Yes, this breaker is rated for direct current applications up to 250VDC, providing a 10kA interrupting capacity for DC systems.
Can I adjust the trip settings on the GDB3070D?
No, this breaker features a non-interchangeable trip unit with fixed thermal and fixed magnetic settings. If your application requires a different trip curve or amperage, the entire breaker must be replaced.
Does this breaker mount onto a standard DIN rail?
No, the GDB3070D is a unit-mount, bolt-on circuit breaker designed to be bolted directly to the chassis or bus of compatible panelboards and switchboards. It is not designed for DIN rail installation.
What does the LI trip function indicate on this breaker?
The LI designation means the breaker provides Long-Time (thermal) and Instantaneous (magnetic) protection. This is the standard configuration for protecting cables and equipment against overloads and short circuits.
Can I install this G-frame breaker in an F-frame space?
No, G-frame and F-frame breakers have different physical dimensions and mounting configurations. The GDB3070D must be installed in a chassis specifically designed for Eaton Series C G-frame breakers.
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