Siemens CMD63B800H Circuit Breaker
- 800
- 3 Pole
Quantity
Siemens CMD63B800H 3 Pole Circuit Breaker
Re-Certified
Quantity
Description
Siemens CMD63B800H 3 Pole Circuit Breaker
The Siemens CMD63B800H is a 3 Pole thermal magnetic molded case circuit breaker with a current rating of 800 Amps and a voltage rating of 600V. It has an interrupting rating of 100kAIC at 480V. The CMD63B800H has a bolt-on connection type and includes long time and instantaneous trip functions.
Specifications
| Brand | Siemens |
|---|---|
| Series | Sentron |
| Amperage | 800 A |
| Poles | 3 |
| Voltage | 600V |
| Phase | 3 |
| AIC Rating | 100kAIC at 480V |
| Frame Type | MD |
|---|
| Trip Technology | Thermal Magnetic |
|---|
| Standards | RoHS, REACh |
|---|---|
| Temp Rating | 40 °C |
Product FAQs
6 answersWhat lug kits are compatible with this MD frame breaker?
The CMD63B800H does not typically include lugs from the factory. It is compatible with Siemens 3TA2N8750 aluminum body lug kits, which accept 500 to 750 kcmil copper or aluminum wire. For smaller wire configurations, the TA3K500 lug kit accepts 1/0 AWG to 500 kcmil wire.
What types of equipment can this breaker be installed in?
This Sentron MD frame breaker is designed for use in Siemens UL 891 switchboards, motor control centers, and large distribution panelboards. It is commonly used for main or large feeder circuit protection in commercial and industrial electrical systems.
Does this breaker feature an interchangeable trip unit?
No, the CMD63B800H features a non-interchangeable thermal-magnetic trip unit. The trip unit is factory sealed and provides both long-time and instantaneous overcurrent protection.
How is this breaker mounted in a panelboard?
The CMD63B800H is a bolt-on circuit breaker. It must be securely bolted directly to the busbars of a compatible Siemens distribution panel or switchboard using the appropriate mounting hardware. Always torque the connections to the manufacturer specifications found on the breaker label.
What is the difference between the CMD and standard MD or HMD breaker types?
The CMD type offers a higher interrupting capacity than standard MD or HMD breakers. While a standard MD63B800 is rated for 50kAIC at 480V and the HMD63B800 is rated for 65kAIC at 480V, the CMD63B800H provides a 100kAIC rating at 480V for systems requiring maximum short-circuit protection.
What safety precautions should be taken before installing this 800A breaker?
Installation should only be performed by a qualified electrical professional. Ensure all power to the switchboard or panelboard is completely de-energized and verified with a voltage meter before beginning work. Proper personal protective equipment must be worn, and all connections must be torqued to the specifications printed on the breaker to prevent arcing or overheating.
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