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Siemens CQD250 Molded Case Circuit Breaker
- 50A
- 2 Pole
- DIN Rail
Siemens
CQD250
Molded Case Circuit Breaker
Brand
Siemens
SKU
CQD250
Quantity
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Siemens CQD250 - 50A 2 Pole Molded Case Circuit Breaker
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Description
A dependable solution for commercial power distribution, the Siemens CQD250 delivers 50A of 2-pole molded case circuit protection. It utilizes a fixed thermal-magnetic trip unit to safeguard critical industrial circuits and equipment from overcurrents. This compact device secures onto standard 35mm DIN rails, making it ideal for OEM panels and control enclosures. Line and load lugs are included for straightforward termination.Specifications
| Brand | Siemens |
|---|---|
| Part Number | CQD250 |
| Series | CQD |
| Amperage | 50A |
| 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, OEM Panels |
| 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 Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | None included |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Reverse Feed, Common Trip, Non-Interchangeable Trip, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
8 answersWhat is the difference between Siemens CQD and BQD circuit breakers?
The primary difference is the mounting configuration. The CQD250 is designed for DIN rail or surface mounting in OEM panels, whereas the BQD series is a bolt-on breaker designed for Siemens panelboards. Both share the same footprint and electrical characteristics.
Does the CQD250 require a specific DIN rail size for installation?
The CQD250 mounts directly onto a standard 35mm DIN rail. It can also be independently bolted directly to a flat surface for custom OEM panel applications.
Are line and load lugs included with the CQD250?
Yes, the CQD250 comes standard with factory-installed lugs on both the line and load ends. The terminals are rated for 8-1 AWG copper or 6-1/0 AWG aluminum conductors.
Is the Siemens CQD250 suitable for reverse feed applications?
Yes, Siemens CQD series circuit breakers are UL Listed for reverse feed applications. This allows for flexible wiring configurations where power can be supplied to either the top or bottom terminals without compromising protection.
Can I install auxiliary accessories on the CQD250?
Yes, the CQD250 supports field-installable accessories like shunt trips, auxiliary switches, and alarm switches. These operational devices are contained within an add-on module that attaches exclusively to the left side of the breaker.
Is the CQD250 rated for HVAC equipment?
Yes, the CQD250 carries an HACR rating, meaning it is tested and approved for use with heating, air conditioning, and refrigeration equipment motor loads.
How should the CQD250 be wired for 250VDC applications?
When applying this 2-pole breaker on a 250VDC system, it must be wired with one pole on each leg of the direct current supply circuit to ensure proper fault interruption.
Are the trip settings adjustable on the CQD250?
No, the CQD250 features a fixed thermal and fixed magnetic trip unit. The long-time and instantaneous trip functions cannot be adjusted in the field.
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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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1 review
- LSLuis S.ReviewingSiemens CQD350 - 50A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/29/17Excellent service
Ill recommend super breakers
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