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Siemens CFD63B090 Molded Case Circuit Breaker
- 90A
- 3 Pole
- Unit Mount
Siemens
CFD63B090
Molded Case Circuit Breaker
Brand
Siemens
SKU
CFD63B090
Quantity
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Siemens CFD63B090 - 90A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for heavy-duty applications, the Siemens CFD63B090 is a 90A, 3-pole molded case circuit breaker from the Sentron FD-Frame family. It provides reliable long-time and instantaneous (LI) thermal-magnetic trip functions. This unit-mount breaker installs into Siemens Sentron panelboards and switchboards. It requires separate lug kits for wire termination, accommodating up to 350 kcmil conductors.Specifications
| Brand | Siemens |
|---|---|
| Part Number | CFD63B090 |
| Series | CFD6 |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480VAC, 100kA @ 600VAC, 50kA @ 500VDC |
| Frame Type | CFD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, Switchboards |
| Wire Gauge | 6 AWG - 350 kcmil (Cu), 4 AWG - 350 kcmil (Al) |
| Max Wire | 350 kcmil |
| Min Wire | 6 AWG (Cu), 4 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | HACR Rated, IEC 60947-2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, Fuseless |
Product FAQs
6 answersWhat panelboards and switchboards are compatible with the CFD63B090?
This breaker is designed for installation in Siemens Sentron panelboards and switchboards.
What does the CFD frame designation indicate?
The CFD prefix designates a fuseless current limiting breaker within the Siemens Sentron FD frame family. It is engineered to restrict let-through energy during a fault to protect downstream equipment.
What wire sizes are accepted by the terminals on this breaker?
The standard lugs accommodate 6 AWG to 350 kcmil copper conductors, or 4 AWG to 350 kcmil aluminum conductors.
Which replacement lug kits fit this CFD frame breaker?
You can install the TA1FD350A lug kit for aluminum or copper wire, or the TC1FD350 lug kit for copper wire only.
How is the trip unit adjusted on the CFD63B090?
The thermal magnetic trip unit features a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short circuit protection.
How does the current limiting function operate during a fault?
The breaker utilizes magnetic repulsion to rapidly separate the contacts during a high-level short circuit. This blow-apart action interrupts the fault before it reaches its peak, reducing thermal and mechanical stress on the electrical system.
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