Siemens CFD63B070 Molded Case Circuit Breaker
- 70A
- 3 Pole
- Bolt-On
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Siemens CFD63B070 - 70A 3 Pole Molded Case Circuit Breaker
New
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Description
A high-performance solution for industrial facilities, the Siemens CFD63B070 is a 3-pole, 70A molded case circuit breaker from the Sentron FD-Frame family. It utilizes a fuseless, current-limiting architecture with blow-apart contacts to safely interrupt high-level short circuits. Designed for secure integration, this breaker mounts into Siemens P2 and P3 panelboards, switchboards, and motor control centers via a bolt-on connection. It features fixed thermal and adjustable magnetic trip units.Specifications
| Brand | Siemens |
|---|---|
| Part Number | CFD63B070 |
| Series | CFD6 |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| 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 P2, P3 Panelboards, Switchboards, Motor Control Centers |
| 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, Motor Operator, Rotary Handle, Padlock Attachment |
|---|---|
| Accessories | Lugs Not Included |
| Standards | HACR Rated, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, Non-Interchangeable Trip, Fuseless |
Product FAQs
7 answersWhat panelboards and enclosures are compatible with the CFD63B070 circuit breaker?
This breaker is designed for installation in Siemens P2 and P3 panelboards, as well as compatible Siemens switchboards and motor control centers.
What wire sizes are accepted by the terminal lugs on this breaker?
The lugs support 6 AWG to 350 kcmil copper wire, or 4 AWG to 350 kcmil aluminum wire.
Can the CFD63B070 be used in direct current (DC) applications?
Yes, it is rated for DC systems up to 500VDC with a maximum interrupting capacity of 50kA.
What does the current-limiting feature of the CFD frame provide?
The CFD frame utilizes a fuseless, current-limiting design with blow-apart contacts. This rapidly interrupts high-level short circuits, reducing let-through energy to protect downstream equipment from thermal and magnetic damage.
Are internal accessories interchangeable within the Siemens FD frame family?
Yes, standard Sentron FD frame internal accessories, such as shunt trips and auxiliary switches, are compatible with the CFD63B070.
How does the trip unit function on this breaker?
It features a thermal-magnetic trip unit with fixed thermal protection for overloads and an adjustable magnetic setting to fine-tune the instantaneous short-circuit response.
How is this circuit breaker mounted into the panel?
It utilizes a bolt-on connection, securing directly to the panelboard bus bars for a stable, high-vibration resistant installation.
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