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Siemens CQD280 Molded Case Circuit Breaker
- 80A
- 2 Pole
- DIN Rail
Siemens
CQD280
Molded Case Circuit Breaker
Brand
Siemens
SKU
CQD280
Quantity
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Siemens CQD280 - 80A 2 Pole Molded Case Circuit Breaker
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Description
Delivering 80 amps of continuous current, the Siemens CQD280 is a 2-pole MCCB designed for commercial applications. It features a space-saving 1-inch pole width. This cable-in/cable-out breaker mounts onto DIN rails in control panels and OEM enclosures. The lugs accommodate 8-1 AWG copper and 6-1/0 AWG aluminum wiring. Providing fixed thermal-magnetic trip functions, it boasts a 65kAIC rating at 240V. The breaker is UL 489 listed, HACR rated, and approved for reverse feed.Specifications
| Brand | Siemens |
|---|---|
| Part Number | CQD280 |
| Series | CQD |
| Amperage | 80A |
| Poles | 2 |
| Mounting Style | DIN Rail |
| Voltage | 120VAC, 240VAC, 480Y/277VAC, 125/250VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 120VAC, 65kA @ 240VAC, 14kA @ 480Y/277VAC, 14kA @ 125/250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | DIN Rail Enclosures |
| Wire Gauge | 8-1 AWG (Cu), 6-1/0 AWG (Al) |
| Max Wire | 1 AWG (Cu), 1/0 AWG (Al) |
| Min Wire | 8 AWG (Cu), 6 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
7 answersWhat type of mounting does the Siemens CQD280 require?
The CQD280 is designed for DIN rail mounting. It snaps onto standard DIN rails inside control panels, automation enclosures, and OEM equipment, rather than plugging into a traditional breaker panel bus.
What wire sizes and materials are compatible with the CQD280 lugs?
The built-in line and load lugs accept 8 to 1 AWG copper (Cu) conductors, or 6 to 1/0 AWG aluminum (Al) conductors.
Can the Siemens CQD280 be used in direct current (DC) systems?
Yes, this breaker is dual-rated for both AC and DC systems. It supports up to 125/250VDC with a 14kA interrupting rating, making it suitable for specific DC control and power circuits.
What is the frame size of the CQD280 circuit breaker?
The CQD280 belongs to the Siemens BQD/CQD frame group, which utilizes a compact design with a maximum frame rating of 100 amps.
How does the trip unit function on the CQD280?
It features a fixed thermal-magnetic trip unit with Long-Time and Instantaneous (LI) protection. The thermal component responds to prolonged overloads, while the magnetic component trips instantly during short-circuit faults.
Is the trip point adjustable on the CQD280?
No, the thermal-magnetic trip unit on this breaker is fixed. It does not offer adjustable settings for the long-time or instantaneous trip functions.
What is the interrupting capacity (AIC) difference between 240V and 480V applications?
When used in 120VAC or 240VAC systems, the breaker provides a high interrupting rating of 65kA. In 277/480VAC systems, the interrupting capacity is 14kA.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Total 5 star reviews: 1 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
1 review
- LSLuis S.ReviewingSiemens CQD350 - 50A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/29/17Excellent service
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