Siemens CQD140 Molded Case Circuit Breaker
- 40A
- 1 Pole
- DIN Rail
Siemens
CQD140
Molded Case Circuit Breaker
Brand
Siemens
SKU
CQD140
Quantity
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Siemens CQD140 - 40A 1 Pole Molded Case Circuit Breaker
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Description
The CQD140 is part of Siemens' Sentron family, designed for robust electrical distribution. Built for commercial applications, it provides reliable long-time and instantaneous trip functions. This 40A breaker installs onto DIN rails, making it ideal for OEM control panels. It features a reverse-feed capable design and includes factory-installed lugs. Rated at 65 kAIC at 120/240VAC, the unit is HACR and HID rated. The thermal-magnetic mechanism ensures consistent performance.Specifications
| Brand | Siemens |
|---|---|
| Part Number | CQD140 |
| Series | CQD |
| Amperage | 40A |
| Poles | 1 |
| Mounting Style | DIN Rail |
| Voltage | 120VAC, 240VAC, 277VAC, 125VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 120VAC, 65kA @ 240VAC, 14kA @ 277VAC, 14kA @ 125VDC |
| Frame Type | CQD |
|---|---|
| Terminal Type | Lugs |
| For Use With | DIN Rail Enclosures, OEM Panels |
| Wire Gauge | 14-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 AWG (Cu), 12 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 |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, HID, RoHS, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
7 answersHow is the Siemens CQD140 mounted in an enclosure?
The CQD140 is designed for DIN rail mounting. It snaps directly onto a standard 35mm DIN rail, which is typical for OEM control panels and industrial enclosures.
What is the difference between Siemens CQD and BQD circuit breakers?
While they share the same frame size and electrical ratings, their mounting methods differ. CQD breakers are designed for DIN rail mounting, whereas BQD breakers are panel mounted or bolted onto surfaces.
Can the CQD140 be used in DC voltage applications?
Yes, the CQD140 is rated for DC applications up to 125VDC, providing an interrupting rating of 14kAIC for direct current systems.
Are lugs included with the CQD140, or do they need to be ordered separately?
The CQD140 features a feed-thru connection and includes built-in lugs on both the line and load sides. The terminals accept 14-6 AWG copper or 12-6 AWG aluminum wire.
Is the CQD140 compatible with standard Siemens residential load centers?
No, the CQD140 is a DIN rail mounted breaker intended for OEM panels and industrial control enclosures. It will not fit into standard plug-on or bolt-on residential load centers.
How does the interrupting rating of the CQD140 change depending on the system voltage?
The breaker provides a 14kAIC rating at its maximum voltage of 277VAC. However, when applied in 120VAC or 240VAC systems, the interrupting capacity increases to 65kAIC.
What type of trip unit does the CQD140 use?
It utilizes a fixed thermal-magnetic trip unit with Long-Time and Instantaneous (LI) trip functions. The thermal and magnetic settings are fixed and 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
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