Eaton / Cutler-Hammer GDB3020D Molded Case Circuit Breaker
- 20A
- 3 Pole
- Unit Mount
Eaton / Cutler-Hammer
GDB3020D
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
GDB3020D
Quantity
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Eaton / Cutler-Hammer GDB3020D - 20A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for industrial applications, the Eaton GDB3020D is a 3-pole, 20A molded case circuit breaker from the Series C family. It provides dependable long-time and instantaneous (LI) protection. This G-frame breaker features a unit mount design, integrating seamlessly into Eaton Series C panelboards, switchboards, and motor control centers. Rated at 14 kAIC at 480VAC, this current-limiting MCCB is HACR rated. The fixed thermal-magnetic trip ensures consistent performance.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | GDB3020D |
| Series | GDB |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 125/250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 14kA @ 480VAC, 10kA @ 250VDC |
| Frame Type | GDB |
|---|---|
| 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 answersWhat equipment is the GDB3020D compatible with?
This G-frame breaker is designed for installation in Eaton Series C panelboards, switchboards, and motor control centers configured for bolt-on unit mount breakers.
Is the Eaton GDB3020D the same as the Cutler-Hammer or Westinghouse version?
Yes. Eaton acquired the Cutler-Hammer and Westinghouse circuit breaker lines. An Eaton GDB3020D is the exact, authentic replacement for older Cutler-Hammer or Westinghouse breakers sharing the same catalog number.
How is the GDB3020D installed in a panel?
This is a unit-mount, bolt-on circuit breaker. It must be mechanically bolted directly to the panel bus or mounting chassis, ensuring a secure connection that will not vibrate loose in industrial environments.
Are line and load terminals included with this breaker?
Yes, the D suffix in the GDB3020D catalog number indicates that it comes complete with line and load terminals. The factory-installed stud and tapped pad connections are ready for field wiring.
How does the fixed thermal-magnetic trip unit operate?
The non-interchangeable trip unit uses a bimetallic thermal element to provide a delayed trip for sustained overloads. A separate magnetic assembly provides an instantaneous trip response to safely clear high-level short circuits.
Can the GDB3020D be used in direct current (DC) systems?
Yes, in addition to its standard AC ratings, this breaker is rated for use in DC circuits up to 250VDC. It provides a 10kA interrupting capacity for compatible direct current applications.
Can I interchange the trip unit on the GDB3020D to change the amperage?
No, the GDB3020D features a non-interchangeable trip unit. The 20A thermal and magnetic trip settings are fixed at the factory and cannot be modified or swapped in the field.
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